Practice More Safely // Risk Tips // Inadequate Informed Consent Leads to Legal Action Against Dentist

Inadequate Informed Consent Leads to Legal Action Against Dentist

Case Study

Marc Leffler, DDS, Esq.
January 16, 2025

Reading time: 7 minutes

Dentist speaking to patient about treatment options.

As a dentist, obtaining proper informed consent is crucial to ensure patients are aware of all the potential risks and outcomes of undergoing treatment. In this case study, a dentist fails to inform a patient about all the possible negative outcomes associated with dental implants, and when the patient’s implants eventually fail, the dentist is sued for malpractice.

Key Concepts

Obtaining Informed Consent
How proper informed consent can mitigate malpractice risk
Recording/documenting patient interactions

Background Facts

W, a retired 68-year-old woman, had been fully edentulous in her maxilla for over a decade, and she functioned adequately with a complete denture, which had been changed once and modified several times. She wore a lower removable partial denture which replaced 5 missing teeth and was very satisfied with every aspect of it. After seeing many recent television commercials talking about the great benefits of implants and implant-supported prostheses, she met with and discussed with her general dentist of many years, Dr. C, the potential for having upper implants (only), to be followed with a fixed bridge.

After examining W, clinically and radiographically, Dr. C determined that W had adequate bone anteriorly for implant placement, but placing posterior implants would require bilateral sinus lifts and grafting, which were procedures that W was unwilling to undergo. So, they both agreed that 4 upper anterior implants would be placed by Dr. C such that a semi-precision removable partial would later be fabricated and placed after implant osseointegration.

Dr. C had taken many courses regarding both the surgical and restorative aspects of implants and had incorporated that into his practice. Dr. C was very technically oriented, which was reflected in his dentistry and in his office infrastructure: among the systems installed in each of his operating suites was a camera/audio set-up, about which he advised his patients, and which was legally permissible – according to his business attorneys – in his state of practice. In this regard, the consultation visits with W were recorded, as were informed consent discussions and the dental procedures. Based upon this system, Dr. C did not employ “consent forms”, but instead conducted what he believed were casual, thorough, back-and-forth spoken interactions, very specific to each patient, to address what he believed were the important pieces of information to make his patients informed consumers.

On the day of surgery, Dr. C placed 4 maxillary implants without any apparent complications. He instructed W as to his usual post-operative protocols, and she followed all of them precisely. Two weeks after surgery, while wearing her existing denture, as modified by Dr. C for that purpose, she presented to the office with inflamed tissues around all the surgical sites, but no signs of infection; no antibiotics were prescribed, but the need for excellent hygiene was reiterated. At a month after surgery, the patient appeared similarly from a clinical standpoint, stating that she was cleaning the areas and rinsing as instructed. Dr. C took a panoramic radiograph and saw what he feared were the beginning stages of implant loss, with some loss of bone at the coronal aspects of all the implants. That situation worsened still, as demonstrated on another panoramic several weeks later.

Dr. C reached the conclusion that the implants were failing and that they should be removed. After explaining this to W, who agreed, he proceeded to remove them, which was an easy process, given their mobility upon flap elevation. Dr. C relined the denture and replaced it, telling W that he would place a new set of implants after the area fully healed. W said that she did not want more implant surgery but would rather just keep her denture and receive a refund for the fees she paid for the implants. Dr. C was unwilling to give a refund, explaining to W that he performed every step of the procedures properly, so he did not understand why he should be returning what was a significant fee. Despite W’s repeated request, Dr. C remained unwilling.

Legal Action

Upset about what she viewed as Dr. C’s inappropriate stance, she contacted an attorney. As a first step, the attorney requested W’s full set of records from Dr. C, who immediately provided copies of his chart and radiographs. When the attorney looked through what was provided, she asked W if she had signed a “consent form,” to which W responded that she had not; but she told her attorney that there was a discussion before the procedure, which she believed was recorded. So, the attorney then requested a copy of all visual and audio records involving W, which were provided.

The attorney consulted with a dental expert who examined the records, but no errors in technique were found by that expert. However, the expert advised the attorney that there was no evidence in any of the recordings that W had been advised of the possibility of implant failure, which was, according to the expert, a foreseeable and routinely advised risk. On behalf of W, her attorney instituted a malpractice lawsuit in which the sole claim was the failure to have obtained informed consent prior to the placement of implants.

Dr. C was provided with legal counsel by his malpractice carrier. Dr. C’s attorney raised the issue with Dr. C of not having advised W of the potential risk of implant loss, to which Dr. C responded that he “always does that.” Not until Dr. C viewed and listened to all recordings involving W did he acknowledge that he had apparently forgotten to advise W of that risk. With Dr. C’s agreement, the matter was settled before any further legal steps were taken.

Takeaways

While the various states might differ as to whether conversations may lawfully be recorded, and under what conditions that may occur, Dr. C’s jurisdiction did allow for exactly what he did (local attorneys are the best sources to learn whether recordings are permissible, and if so, the conditions under which they are). But dentists who choose to avail themselves of laws which allow for recording patient conversations should be aware that, in the event of litigation, those recordings might become available to other parties to the litigation and their attorneys. It is quite common for dentists who are sued to testify as to their usual course of conduct in practice, whether clinically or in communication; here, had a recording not been available, Dr. C would have likely – and seemingly in good faith – testified that, as he told his attorney, he “always” advises patients of the risk at issue, and that would have resulted in differing testimony by the opposing litigants, to be determined by a jury. But in this case, there was no dispute because of the tangible evidence that existed.

Dentists may have varying reasons for wanting to record their interactions with their patients, from memorializing conversations, to documenting their clinical techniques and results, to wanting to do periodic self-reviews to make sure that their practice methods are working. Regardless of their intended use, recordings are clear and unwavering evidence of all actual events at hand, whether intended or not. So, as valuable as they might be, they can make their way back to surface in a litigation situation, whether that litigation involves a patient, business associate, or staff member.

Addressing the clinical picture discussed in this case study, it is a simple fact that implants do, at times, fail, despite all having been properly performed. The same goes for a variety of other dental procedures. But as the plaintiff’s expert in this case appropriately noted, the fact that a result was undesired, alone, does not mean that there was actionable malpractice; for a malpractice case to succeed, there must not only be an injury, but that injury must have been caused by negligent treatment.

Next, we address the issue of informed consent. Although the specifics will differ between states, the concepts are generally constant: prior to a patient undergoing a procedure, they are entitled to be advised of the information necessary for them to become an educated consumer, to be able to make an intelligent choice as to what they might opt to undergo, or not. Here, even though the procedure was properly performed, the fact that W was not made an educated consumer in advance, and the procedure she agreed to without adequate knowledge led to an undesired result, led to a valid and viable lawsuit.

Finally, we note, without comment, that Dr. C opted against providing W with the fee refund she requested, and that was presumably a factor which led her to retain an attorney and institute suit. It is an entirely open question as to what actions W would have taken, if any, in the face of failed implants, if she had been given the refund she sought.

Note that this case presentation includes circumstances from several different closed cases, in order to demonstrate certain legal and risk management principles, and that identifying facts and personal characteristics were modified to protect identities. The content within is not the original work of MedPro Group but has been published with consent of the author. Nothing contained in this article should be construed as legal, medical, or dental advice. Because the facts applicable to your situation may vary, or the laws applicable in your jurisdiction may differ, please contact your personal or business attorney or other professional advisors if you have any questions related to your legal or medical obligations or rights, state or federal laws, contract interpretation, or other legal questions.

In this case study, dentists will discover how a rushed procedure, antibiotic selection, and non-clinical staff advice led to a malpractice lawsuit and patient harm. This article highlights the importance of informed consent, careful risk management, and keeping patient communications strictly professional.

Key Concepts

Antibiotic risks and complications in dental care
Non-clinical staff-patient communication
Patient choice vs. the standard of care

Underlying facts

D, a 26-year-old man, presented to an endodontist, Dr. Q, on referral of his family dentist, some 6-7 years following his having been struck in the face by a batted baseball. Over the past few months, tooth #8 had begun to darken and become episodically painful. Approximately a week prior to this visit, D developed a pea-sized swelling in the gingiva at the level of the tooth's apex. Radiographically, a periapical radiolucency on #8 was visible, and the tooth was non-vital. The endodontist suggested endodontic therapy, to which the patient agreed.

Upon entry into the pulp chamber, yellow, foul-smelling purulent discharge exuded through the tooth; the apical swelling immediately reduced in size. The tooth was thoroughly irrigated internally until no pus was visible. Because D was soon going out of town for work for several weeks, he asked the endodontist if she could "just finish it up" that same day, rather than returning a week later as Dr. Q had suggested. Dr. Q acceded. After the filing was completed, obturation with gutta percha was performed by Dr. Q, with the apical extent approximately 1mm short of the radiographic apex. NSAIDs were recommended as needed.

Two days later, D called the office and told the receptionist that he had a sudden increase in swelling and a low-grade fever; the receptionist reassured the patient by saying, "we see this all the time so it's nothing to worry about," without having consulted with Dr. Q. Three days after that, while still traveling and with the swelling now approaching the eye, D called the endodontist after hours and spoke directly with her; the patient reported an allergy to Penicillin, so Dr. Q called in a prescription for Clindamycin, which the patient started that same evening.

Now nine days after the initial treatment, the patient again called the office and spoke with Dr. Q, advising her that his facial swelling was much reduced and getting better continually, but he had spasmodic diarrhea; the endodontist told her patient that, as long as the dental symptoms were improving, which they were, he should continue and finish out the antibiotic and take over-the-counter anti-diarrheal medications. The patient did exactly that but ended up in a hospital emergency room a few days later for worsening and uncontrollable diarrhea with severe GI pain, where he was diagnosed with Clindamycin-induced pseudomembranous colitis. He was admitted for IV fluids/antibiotics and supportive care; he was monitored for a potential peritonitis, which never came to pass, and was discharged home after losing seven pounds. D was unable to secure the sales deal he had traveled for, as he was hospitalized during several scheduled meetings; the potential client made the transaction with another vendor.

Legal action

In addition to the physical upheaval that he had experienced, and the medical and hospital bills which were only partially covered by his insurance plan, D was mostly distressed by the fact that he had lost the opportunity for a large sale that he believed would have positioned him for an early-career promotion, with its associated salary increase. He sought out and retained an attorney.

The newly hired attorney forwarded the dental and medical records to two potential experts, an endodontist and a medical infectious diseases specialist. The endodontist was of the views: that under the existing conditions, the root canal treatment should not have been completed in one visit, but acknowledged that this was a judgment call such that other practitioners might well disagree; that if Dr. Q did agree to complete the procedure in one step, as she did, the prescribing of antibiotics at that time would have been preferred, but again recognized that some other endodontists would not agree; that Dr. Q's providing Clindamycin in the face of a potential Penicillin allergy, in a patient with a worsening infection and unable to be seen clinically, was an acceptable choice, although it was unclear whether Dr. Q adequately discussed the possible GI risks with D; and that the office receptionist was clearly and inappropriately acting beyond her non-professional status in providing the advice that she gave.

The medical expert confirmed that it was clearly the Clindamycin that was responsible for all of the GI symptoms experienced by D, as well as the hospital care that followed, and that the 3-day delay (and worsening infection) created by the receptionist's advice deprived both D and Dr. Q of the opportunity to have an antibiotic with less severe side effects than Clindamycin to have been used.

D's attorney opted for a simple litigation approach. On behalf of D, he filed suit against Dr. Q's practice entity – but not Dr. Q – based upon what the attorney viewed as strong arguments on both the liability and causation fronts as to the practice, with only "judgment call" issues available against Dr. Q. The damages claimed were the GI-based pain and suffering, the unpaid medical costs, the monetary values of the "lost" sale and the "loss" of salary increase. Given that Dr. Q's practice entity was covered for malpractice, the carrier provided defense counsel to put forth a defense for the practice, working with Dr. Q for that purpose, although not defending her personally.

After depositions were taken, the defense attorney applied to the Court to have the values of the lost sale and potential salary excluded from any potential damages able to be recovered. The Court agreed, determining those amounts to be entirely speculative, in that even if D would have had the chance to attend the meetings he missed, those were merely "opportunities,” so there is no way to prove that he would have been successful in his endeavor. The other claims in the case remained. Realizing the pitfalls of trying to defend the actions of the receptionist, Dr. Q and the practice's attorney, with the agreement of the carrier, worked toward and completed a settlement on behalf of the practice, for an amount which took care of expenses and physical pain and suffering, with no permanent after-effects, at a far lower value than had lost earnings been included.

Takeaways

In essence, D's expert endodontist determined that all of the actions taken by Dr. Q – the one-visit RCT, the non-prescribing of antibiotics at that time, and the choice of Clindamycin – were judgment calls, subject to opinions as to appropriateness on both sides of the fence, thereby leading D's attorney to refrain from pursuing those claims. [We note here that not all attorneys for plaintiffs would approach this in the same way.] Instead, the lawsuit was focused on what D's attorney viewed as a sole "winning argument," which was in fact the result. To reiterate a concept discussed in prior case studies, the general principle is that a plaintiff must prove through expert testimony that – with a general standard of "more likely than not" – a defendant dentist departed from good and accepted practice standards, thereby directly causing injury to the patient. For all issues except for the receptionist's involvement, the endodontist expert for D did not adequately meet that hurdle, at least in the eyes of D's attorney; the medical expert causally connected the receptionist's actions with the injuries to D.

There has been and continues to be controversy in the dental community regarding the use of Clindamycin. While its potentially severe side effects are well-publicized, it has therapeutic benefits as well: the classic double-edged sword. We do not comment upon the propriety of a given practitioner's choice to prescribe it in a particular situation, but just as with all choices, they are best made with a sound and deliberative thought process, so that a defense can be meaningfully put forward if untoward results come to pass.

As a side thought, we visit the issue of a case settling as against a practice entity versus the dentist him/herself; if such a potential ever exists during a malpractice case management, it is something to be coordinated between the dentist, liability carrier, and defense counsel. As a general rule, although potentially with exceptions, payments for professional liability against individual practitioners are reportable to national – and sometimes state – data banks and authorities, whereas those against an entity, as here, are not. To be clear, it is never a given that case resolutions of the type done here can always be made; to the contrary, it is not very common in the world of dental malpractice, with carriers constrained to do so only after an assessment that no specific provider bore any liability. But none of this negates the importance of dental practitioners assuring that dental/medical advice to patients must only be given by dental professionals, leaving only administrative tasks to non-professional staff members.

We end with a brief discussion about dentists acceding to performing procedures that patients "demand," even when those dentists do not believe that doing so is in those patients' best interests. Yes, patients have an absolute right to decide which of multiple alternatives they wish to pursue, but only if those alternatives are dentally and/or medically viable. Patients can refuse anything, but they should not dictate what a dentist must do.

Description / Intro

Ever wondered what happens when dentists step into sleep medicine without the right safeguards? This real-life case study shows how an Obstructive Sleep Apnea (OSA) treatment went wrong - leading to broken appliances, unexpected costs, a dental board complaint, and a malpractice claim.

Key Concepts

Practicing within your scope
Malpractice litigation which includes Dental Board findings
Attorney analysis in dental malpractice claims

Background facts

C presented to the dental office of Dr. M, based upon Dr. M's social media advertising that C's adult children had seen. At the time, C was 71 years old, obese with a large neck circumference, and, according to his wife, a frequent and loud snorer. Although retired, he often felt tired and struggled to get through the day without a nap. Upon meeting with his new patient, Dr. M expanded upon his online ads, explaining how he had managed many patients with sleep disorders that negatively and significantly had impacts upon their sleeping and waking lives. Dr. M initially suspected, based upon C's outward physical appearance and related history, that C was suffering from some degree of obstructive sleep apnea (OSA).

Dr. M did an oral examination, noting enlarged tonsils, a seemingly large tongue, dental wear consistent with bruxism, and mild mandibular retrognathia, all of which are frequent findings in patients with OSA. To work toward determining the validity of a presumptive OSA diagnosis, Dr. M suggested that C undergo home sleep apnea testing (HSAT) by using a kit that Dr. M was able to obtain from an overseas manufacturer and source. The process would involve C self-applying a device at home - just prior to going to sleep – with a number of sensors that measure parameters associated with assessing oxygenation, airflow, and breathing effort/patterns, among others. Dr. M explained that, if the OSA diagnosis was confirmed, he would be able to treat C dentally and reduce his life-disrupting symptoms. C was fully on board.

Dr. M obtained the HSAT device, instructed C on its use (which would involve applying it for only one night), and asked him to return upon its completion so that he could analyze the raw data. C did as he was asked, leading to Dr. M diagnosing what he characterized as "moderate to severe OSA." Dr. M fabricated an acrylic oral appliance to be worn while sleeping, the stated purpose of which was to pull the mandible and tongue forward, thereby opening the oral airway space and keeping it that way during sleep. After wearing the device for several weeks, C (and his wife) saw no benefits; rather, C was experiencing TMD-type muscle pain, which was new for him. Dr. M's response to C was that the process takes time, so he should continue on.

At approximately 3 months after the appliance was first used, C suddenly awoke to severe coughing and feeling a sharp edge on the appliance, which had clearly broken into pieces, likely (according to Dr. M's later statements) due to C's heavy bite and grinding. C was unable to locate some of the broken pieces, and he had persistent coughing and sharp pain in his throat. An emergency room physician determined that C had swallowed a few pieces of cracked acrylic; an endoscopy under general anesthesia was required for their removal, after which C remained hospitalized for a day, to be certain that there was no latent bleeding from the esophagus or stomach. His discomfort remained for some time, and he never returned to Dr. M for a new appliance to be made.

C submitted his bills to his medical and dental insurance carriers. While some of the hospital costs were covered, neither carrier reimbursed for Dr. M's fees, stating that Dr. M was not the type of provider fit to diagnose OSA without collaboration with a physician; as such, the high costs of the HSAT, the dental work-up, and the appliance had to be fully borne by C.

Legal action

C was upset about the costs that he had not anticipated, so he sought out a lawyer's opinion as to whether and how they could be recovered. In speaking with the attorney, the discussion led to C's "choking" experience, his hospitalization, and his subsequent discomfort.

Both agreed on an approach to sue Dr. M for dental malpractice (in fabricating the type of appliance that would be subject to breakage – and its consequences - due to C's known bruxing tendencies), and filing a Dental Board complaint, employing the concepts C heard from the insurance companies, that Dr. M had practiced beyond his lane. C's attorney was of the view that a Board finding against Dr. M, for essentially practicing outside of the dental profession's limits, would help the cause in the parallel malpractice case.

The attorney was correct. Following a Board hearing, at which Dr. M was represented by the attorney defending the malpractice case against him, Dr. M was sanctioned, with the Board determining that, in the State where Dr. M practiced, dentists are not permitted to diagnose OSA on their own, with that being solely within the purview of physicians; the Board reasoned that OSA is a medical (not dental) diagnosis, and while dentists may properly treat OSA using dental modalities, the process of testing and analyzing test results is not part of the practice of dentistry. Concerned about the potential impact of that finding by the Board upon a malpractice trial jury, Dr. M agreed with the suggestion of his attorney that the malpractice case should be settled, which it was. The monetary amount of settlement was modest, given that it was limited to the actual out-of-pocket medical and dental costs, a relatively small degree of pain, and the lack of any permanent injuries.

Takeaways

States might differ as to what they consider to be within the bounds of dentistry, and that might sometimes be even more tailored based upon specialty training and experience. As an example, treatment of the zygoma might be acceptable for an oral surgeon, but perhaps not for other dental practitioners. The bottom line is that dentists are wise to check into definitions of the "practice of dentistry" prior to engaging in areas outside of what is thought of as "traditional" dentistry. The same goes for related diagnostic testing, as explained in this case study by the Board. It is worth noting that it is far from unusual that an acrylic oral appliance might break due to occlusal stresses, which would most likely not be negligent (although it might be argued as such here in the face of C's bruxism); but bruxism aside, the difference here is that the breakage event took place as a by-product of – at least according to this Dental Board – a rule violation, which some lawyers might refer to as negligence per se, giving the malpractice case an entirely new complexion (, one that can be explored more deeply in a future case study).

Specifically with regard to the facts involved here, and as obvious as this sounds, OSA is a serious medical condition, with general systemic implications that go well beyond dentistry. If the facts of this case study were to have changed, such that, instead of the injury being a broken acrylic appliance and its associated complications, C had suffered an MI or a stroke as a result of inadequately addressed OSA that was thereby allowed to worsen, the results for both C and Dr. M could have been far more severe.

While often overlooked, a significant driver of malpractice claims is a money-based issue, whether it is fees seen by a patient as excessive, or non-reimbursement by a health insurance carrier (as here), or attempts by a dentist to collect unpaid fees, or unanticipated subsequent costs, or prolonged time out of work so as to cause loss of income. Looking below the surface, it is not necessarily only these financial considerations that come into play in malpractice lawsuits; they may well serve as the basis for a patient to seek legal counsel, which then extends to more avenues of investigation, which then leads to different and more components to the suit. Money disputes can spur a patient's initial actions, but they are often not the end of the story.

We end with some thoughts about the analytical processes engaged in by attorneys, who are significant players for both the patient-plaintiff and the dentist-defendant. Attorneys for plaintiffs, especially those who are seasoned, understand, and often apply a multi-pronged approach against dentists on behalf of their clients. That might be seen by some as a "whatever sticks to the wall" tactic, which can be distasteful to defendants. This is far from unusual, particularly at the start of cases; as cases mature, though, the stronger aspects remain, while the weaker ones fall away: the discovery component of litigation is a critical factor in developing the points of focus which will be the heart of the trial. C's attorney reasoned, in good faith (as attorneys are required to do), that the pressures placed by both a Board action and a malpractice suit would work to his client's benefit in the end; that is not always the case, either in approach or result, but defendant-dentists ought not be surprised if they find themselves on the receiving end.

Attorneys for defendants go through their own analyses, sometimes to answer strategies by their counterparts, but other times to steer the ship independently, which can effectively thwart the actions of plaintiffs' attorneys and take them away from planned techniques. The world of litigation is cat and mouse, working with facts, law, and personalities. All told, litigation styles are unique, with those employed in a given case needing to comport with the available facts, the law, and the people involved. It is complicated but rarely dull.

[post_title] => Dental Malpractice Risks in Treating Obstructive Sleep Apnea [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => dental-malpractice-risks-in-treating-obstructive-sleep-apnea [to_ping] => [pinged] => [post_modified] => 2026-01-16 12:16:45 [post_modified_gmt] => 2026-01-16 17:16:45 [post_content_filtered] => [post_parent] => 0 [guid] => https://medprodental.com/?p=10163 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [2] => WP_Post Object ( [ID] => 10134 [post_author] => 180159417 [post_date] => 2025-12-09 14:48:33 [post_date_gmt] => 2025-12-09 19:48:33 [post_content] =>

In this case study, dentists will gain insight into how an inferior alveolar nerve injury following a routine mandibular block led to a malpractice lawsuit. These lessons underscore how clinical decisions and communication can significantly impact legal outcomes.

Key Concepts

Nerve injury after local anesthesia
Why informed consent matters
Depositions and malpractice defense

Underlying facts

Dr. L, a general dentist, had been treating Y, a middle-aged woman, for several years, handling all of her dental needs. Y was generally healthy, with her only stated medical concerns being medication- and diet-controlled diabetes. Y presented with a straightforward, albeit deep, occlusal carious lesion treated with a composite restoration.

Concerned that Y might feel discomfort during the procedure due to the depth of the caries, he opted to give her a mandibular block using a commonly used 4% local anesthetic solution. [We opt here to refrain from identifying any particular brand name.] Dr. L gave the block as he had done so many times in the past, using anatomic landmarks to reach the specific injection site and aspirating prior to releasing the anesthetic. Y did not react as though she felt anything untoward, and she soon reported being numb in the areas expected. Dr. L performed a Class I restoration, using a base following the removal of decay, and then placing the composite material he had planned. Y was discharged home shortly after.

The following morning, Y called the office asking why her lower lip on the side of the treatment remained profoundly numb. The receptionist was unable to provide an answer, so she left a note for Dr. L to return Y's call as soon as he finished treating his current patient. Dr. L was surprised by what Y explained to him, so he asked her to come to the office to see him, which she did two days later.

On examination, Dr. L confirmed that Y was experiencing paresthesia to the region innervated by the mandibular nerve; he explained to Y that, in his opinion, the problem was due to a lingering effect of the local anesthesia, as he had not done anything else that was even remotely close to any portion of that nerve or the broader trigeminal nerve. He followed Y for several months, finding no improvement, and eventually referred Y to see an oral surgeon at about the 4-month post-treatment mark.

The oral surgeon agreed that the issue likely arose from the injection, but offered Y no surgical or other resolution, saying that nerve injuries induced by anesthetic shots were not amenable to surgical repair – generally because there was no sectioned nerve that could be "put back together" – and because, without any pain component to the injury, no medications were indicated. Y never regained sensation. Y asked Dr. L why he never warned her about this possibility, and he responded that he had never discussed that risk with any patient unless he was about to perform surgery near a nerve branch.

Legal action

Dissatisfied with that answer, Y did some internet research, learning that she was not alone and locating a local attorney who had handled cases like this before. That attorney gathered the needed records and asked a dentist, with whom he had worked on litigation matters before, to assist Y. The dentist, soon to serve as Y's expert, concluded, in addition to an inadequate obtaining of informed consent, that the injury happened as a result of two possible scenarios, both of which were negligent: (1) that Dr. L used an anesthetic agent which was well-known to be implicated in leading to nerve injuries when used for mandibular blocks; or (2) that Dr. L was unaware of "safe versus danger zones" for the delivery of the solution. A dental malpractice lawsuit was begun against Dr. L, claiming lack of informed consent and negligence in the choice of anesthetic and/or its delivery.

A sworn deposition (a usual component of the discovery phase of dental malpractice cases) was taken of Dr. L by Y's attorney, in the presence of Dr. L's attorney. During that proceeding, Dr. L was asked why he did not advise Y of this potential risk, and he responded exactly as he had done a year prior when responding to Y's same question. He was then asked about his injection technique, providing a solid and detailed discussion about piercing the pterygomandibular raphe, contacting the medial aspect of the ramus, and then advancing the needle toward the lingula after pulling back from bony contact "a tiny bit", and then aspirating to determine that there was no vascular involvement, before slowly injecting the solution. A particularly adversarial portion of the deposition took place when the attorney asked Dr. L about his views regarding the use of the 4% solution of the anesthetic he employed: Dr. L was only minimally aware of the controversy within the dental community in that regard, so he was unable to fully justify his rationale for doing so.

Just prior to the trial, Y's attorney abandoned his claim based upon technical and anatomic deficiencies in the injection process, essentially due to Dr. L's strong deposition testimony on that issue, deciding upon going to the jury with the theories of lack of informed consent and the improper use of his chosen anesthetic agent. The expert on behalf of Dr. L, a dentist on school faculty, acknowledged that some dental schools did not permit the use of that specific anesthetic agent for blocks, even though his school did not have such a policy.

As was learned from attorney interviews with jurors after they rendered a verdict for Y, and awarded her a sizeable sum of money for her permanent injury, the members of the panel concluded from the testimony of Dr. L's expert that, if there were some dental schools that did not permit the anesthetic solution at issue for block injections, specifically because of the same potential result as occurred here, there had to be a good scientific basis for the theory presented. On the other hand, the jury rejected the notion of lack of informed consent in this situation, with 2 jurors individually saying, "I've had a number of those injections, and my dentist never said anything about a potential nerve injury." For the plaintiff to have been successful, as she was here, she needed to prove only one of her theories of malpractice that caused an injury.

Takeaways

This case speaks to the great importance of deposition testimony, both positively and negatively, toward the eventual case outcome; pre-trial testimony has the same force and effect as though it were elicited in a courtroom in front of a jury. Dr. L's demonstrated expertise regarding the technique of giving mandibular blocks, including his knowledge of the related anatomy, led to plaintiff's counsel dropping that claim from the case. Conversely, his lack of full understanding of the profession-wide debate about the propriety of using a particular anesthetic agent was arguably a significant factor in Y's attorney's choice of moving forward at trial in that direction and was clearly a critical consideration for the jury. The point to be made is that pre-deposition preparation, ideally in tandem with defense counsel, is critical to a case's ultimate result. When carriers who defend dental malpractice cases on a regular basis choose their defense counsel, those attorneys are expected to be fully familiar with all potential and actual case issues, so that they can best guide their dentist clients through every litigation step; but with or without the guidance of veteran defense counsel, defendant-dentists do well when they fully prepare themselves so as to best self-advocate.

As to whether a particular anesthetic solution – or in fact any dental product – is appropriate for patient use in a given situation, we do not provide opinions one way or the other, instead leaving that set of considerations solely in the hands of the treating dentist. We do suggest, however, that every "judgment call" determination be based upon principles that the dentist is able to justify, in the event that a lawsuit arises about it later on.

Finally, we discuss the concept of informed consent in the context of local anesthesia. Strictly speaking, patients are always entitled to be provided with foreseeable risks, planned procedure benefits, and viable alternatives before the start of any and every dental procedure. Simply because many dentists do not routinely engage their patients in such a process, as this jury concluded to be the case regarding local anesthesia, does not mean that the process is not warranted; and simply because this jury decided as it did does not necessarily mean that another similarly situated jury would not act otherwise. It might well be that a robust informed consent process is not particularly helpful for success on the business end of dental practice, so that internal battle is left to each dentist to work through for themselves, always keeping patients' best interests at the forefront. Informed consent is not solely a signed piece of paper titled "consent form," but instead an interactive process between dentist and patient; the paper merely memorializes that process.

[post_title] => IAN Injury After Local Anesthesia: Legal and Clinical Takeaways [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => ian-injury-after-local-anesthesia-legal-and-clinical-takeaways [to_ping] => [pinged] => [post_modified] => 2025-12-16 10:08:52 [post_modified_gmt] => 2025-12-16 15:08:52 [post_content_filtered] => [post_parent] => 0 [guid] => https://medprodental.com/?p=10134 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) ) [post_count] => 3 [current_post] => -1 [before_loop] => 1 [in_the_loop] => [post] => WP_Post Object ( [ID] => 10195 [post_author] => 180159417 [post_date] => 2026-01-09 04:03:29 [post_date_gmt] => 2026-01-09 09:03:29 [post_content] =>

Key Concepts

Antibiotic risks and complications in dental care
Non-clinical staff-patient communication
Patient choice vs. the standard of care

Underlying facts

Legal action

Takeaways

[post_title] => Clindamycin Side Effects Lead to Dental Malpractice Lawsuit [post_excerpt] => [post_status] => publish [comment_status] => closed [ping_status] => closed [post_password] => [post_name] => clindamycin-side-effects-lead-to-dental-malpractice-lawsuit [to_ping] => [pinged] => [post_modified] => 2026-01-16 13:00:09 [post_modified_gmt] => 2026-01-16 18:00:09 [post_content_filtered] => [post_parent] => 0 [guid] => https://medprodental.com/?p=10195 [menu_order] => 0 [post_type] => post [post_mime_type] => [comment_count] => 0 [filter] => raw ) [comment_count] => 0 [current_comment] => -1 [found_posts] => 75 [max_num_pages] => 25 [max_num_comment_pages] => 0 [is_single] => [is_preview] => [is_page] => [is_archive] => 1 [is_date] => [is_year] => [is_month] => [is_day] => [is_time] => [is_author] => [is_category] => 1 [is_tag] => [is_tax] => [is_search] => [is_feed] => [is_comment_feed] => [is_trackback] => [is_home] => [is_privacy_policy] => [is_404] => [is_embed] => [is_paged] => [is_admin] => [is_attachment] => [is_singular] => [is_robots] => [is_favicon] => [is_posts_page] => [is_post_type_archive] => [query_vars_hash:WP_Query:private] => 0bb710c47d69ee774e7bc8b4a1671174 [query_vars_changed:WP_Query:private] => [thumbnails_cached] => [allow_query_attachment_by_filename:protected] => [stopwords:WP_Query:private] => [compat_fields:WP_Query:private] => Array ( [0] => query_vars_hash [1] => query_vars_changed ) [compat_methods:WP_Query:private] => Array ( [0] => init_query_flags [1] => parse_tax_query ) [query_cache_key:WP_Query:private] => wp_query:c830980a3b14e69f64902e9ca2279945:0.06867900 17686258480.16070600 1768625848 )

Additional Risk Tips content

Clindamycin Side Effects Lead to Dental Malpractice Lawsuit

A dental malpractice case reveals the risks of clindamycin, informed consent gaps, and the impact of non-clinical staff advice on patient safety.

Dental Malpractice Risks in Treating Obstructive Sleep Apnea

Learn how a dentist’s OSA treatment led to malpractice claims. Explore legal risks, informed consent strategies, and key lessons for dental professionals.

IAN Injury After Local Anesthesia: Legal and Clinical Takeaways

Explore a real-world dental malpractice case involving inferior alveolar nerve (IAN) injury after local anesthesia. Learn key risk management principles, the role of informed consent, and how deposition testimony can influence case outcomes.

This document does not constitute legal or medical advice and should not be construed as rules or establishing a standard of care. Because the facts applicable to your situation may vary, or the laws applicable in your jurisdiction may differ, please contact your attorney or other professional advisors if you have any questions related to your legal or medical obligations or rights, state or federal laws, contract interpretation, or other legal questions.

MedPro Group is the marketing name used to refer to the insurance operations of The Medical Protective Company, Princeton Insurance Company, PLICO, Inc. and MedPro RRG Risk Retention Group. All insurance products are underwritten and administered by these and other Berkshire Hathaway affiliates, including National Fire & Marine Insurance Company. Product availability is based upon business and/or regulatory approval and/or may differ among companies.