Practice More Safely // Risk Tips // IAN Injury After Local Anesthesia: Legal and Clinical Takeaways

IAN Injury After Local Anesthesia: Legal and Clinical Takeaways

Marc Leffler, DDS, Esq.
January 30, 2026

Reading time: 7 minutes

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.

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.

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Dentists must stay informed on new guidelines regarding patients with planned joint replacement surgeries. In this case study, a dentist performs tooth extractions less than two weeks before the patient’s knee replacement. The orthopedic surgeon cancels the surgery upon learning about the extractions, explaining to the patient that there are new guidelines for the timing of such procedures. The patient complains to the dentist about their inconvenience and lack of awareness, but no legal action is ultimately taken.

Key Concepts

Staying informed on evolving dental guidelines
Understanding protocols for patients with joint replacements
The importance of documentation in dentistry

Background Facts

P knew, from years of being told by various dental professionals, that he needed a number of teeth extracted due to gross decay. He admittedly did not have regular and adequate home oral hygiene habits, often leaving him with plaque build-up throughout his mouth and several areas of calculus, particularly on his lower anterior teeth. With an elective knee replacement surgery coming up in 2 weeks, he thought that this would be a good time to have those teeth extracted, in large part because he had read some online information about knee surgery and the potential for mouth bacteria to spread to that surgical site and lead to knee prosthesis loss.

When Dr. N examined P, clinically and radiographically, she noted 8 teeth in need of extraction, in addition to a long-overdue prophylaxis. P made Dr. N aware of the upcoming knee surgery. She arranged for P to have a cleaning that same day, with the extractions to be completed in 3 days.

The extractions went forward uneventfully, leaving a week-and-a-half before the scheduled orthopedic surgery. P saw Dr. N post-operatively to check the extraction sites, 5 days before the knee was to be treated, and all appeared to be healing within normal limits, although a lone bone spicule was easily removed.

P met with his orthopedic surgeon, Dr. C, in the hospital's pre-surgical waiting area, where P casually mentioned that he had multiple dental extractions about 10 days prior, and the removal of a "small sliver of bone 5 days ago." Dr. C immediately canceled the knee replacement surgery and told P to contact his office to reschedule once there would be no further dental intervention in those sites. At P's request to understand more, Dr. C explained that current guidelines, which had "just taken effect," included that there be a waiting period between oral surgery procedures and certain elective joint surgeries. Frustrated at the situation – because he had taken time off from work, asked family members to rearrange their own schedules to assist him upon his return home, would now need to redo his pre-operative lab testing, and would have to again go through the stress in anticipation of surgery. P contacted Dr. N's office, asking to come in immediately.

Dr. N was surprised to see P, expecting that he would have been hospitalized and under his orthopedic surgeon's care. P angrily explained what had happened, with Dr. N listening intently. Dr. N said that she had been unaware of any protocols in place that would have led Dr. C to cancel surgery for a dental-based reason. Nevertheless, she apologized profusely, but P never returned to see her. P located another dental practitioner, who determined the extraction sites to be completely healed, roughly a month or so later. P underwent successful knee replacement surgery, albeit several months after initially planned, with no complications.

Legal Action

Still upset over the entire episode, P spoke with a cousin who is an attorney, as well as a local medical malpractice lawyer. Both gave him the same advice, namely that, although he had suffered from significant inconvenience due to Dr. N's lack of knowledge, he had no damages which would reasonably be compensable. The second attorney also pointed out that, even if Dr. N had been aware of the new protocol, the teeth were quite likely in need of extraction before the joint surgery anyway, so the orthopedist would have postponed the procedure in any event. All of P's frustrations would have, therefore, been essentially the same.

Understanding that suing Dr. N would only be able to happen if he represented himself, P sent her a letter requesting copies of his entire chart, and asking her to report the incident to her malpractice carrier, which she did. No further action was ever taken by P.

Takeaways

The "current guidelines" referenced by Dr. C came into effect in late 2024, by way of protocols jointly developed by the American Academy of Orthopedic Surgeons (AAOS), the American Dental Association, and several other organizations. By way of history, the use of antibiotics in association with dental procedures for patients with joint replacements was recommended until as recently as approximately 2012, when the guidance changed to consider discontinuing that practice. The current approach regarding the relationship between dentistry and joint replacements takes antibiotics out of the picture, and instead speaks to the timing of certain dental procedures, both before elective total joint arthroplasty (TJA) and after any TJA. The organizations involved carefully referred to them as guidelines, as compared with standards of care (SOC). But in a litigation setting, it is far from unforeseeable that an expert for a plaintiff might well incorporate the guidelines into their testified-to SOC, if the guidelines were not followed and a negative event ensued.

The new guidelines, briefly stated, are: (1) noninvasive and minimally invasive dental procedures can be performed until the day before elective TJA; (2) dental extractions and other oral surgery procedures should be completed at least 3 weeks before elective TJA (because they can be expected to take up to 3 weeks to heal); and (3) most dental procedures should be delayed – if possible – for 3 months after TJA. The goal, according to the co-chair of the guideline group, is to prevent infections that might emanate from dental procedures, due to bacterial entrance into the bloodstream, which can then attach to the new joint prosthesis, thereby infecting it.

Even though litigation never took place in this case study, it would not be unexpected to imagine that litigation might well have gone forward if the result to P were different. For example, if P had the TJA and then presented to Dr. N 1-2 months later, and if Dr. N had performed the extractions at that time (with both P and Dr. N unaware of the new guidelines), and if the joint prosthesis were then lost to infection due to bacteria commonly found in the mouth, an expert for P, as plaintiff, would be able to make a colorable argument that P suffered as a result of Dr. N not following a published guideline, namely the waiting for 3 months after the TJA to extract the teeth.

A fair reading of the guidelines leaves some room for interpretation, such as what constitutes “noninvasive and minimally invasive dental procedures,” and what dentistry fits under the umbrella of "most dental procedures." If unclear, a risk-protective approach is to directly involve the orthopedic surgeon, explaining what dentistry is planned, so that the surgeon replacing the joint can have input into the plan of action. In such situations, documentation of those communications is critical, in the event that a lawsuit or Board action were to later arise. A written plan – a letter, email, or text message – from the orthopedist is ideal, but absent that, a detailed, contemporaneous entry by the dentist/oral surgeon into the patient's chart will serve as a solid, if not perfect, memorialization.

With dentistry and medicine fronts expanding at a fast pace, and with technology fueling that expansion, sometimes seemingly overnight, the burdens upon dental professionals to stay up to date about all aspects of patient care can be daunting. But that is exactly what is required to practice within the standard of care. The fact that a dentist might not be aware of very recent, yet relevant, changes that directly affect their practice will not serve to excuse any lapses that occur as a result. An approach looked at today as up-to-date might be viewed as old-fashioned and outdated tomorrow. Here, although Dr. N was made aware of P's upcoming knee replacement surgery, she was not aware of the potential impact of her planned dental treatment upon that surgery. That directly and negatively affected P, but fortunately, in not very significant ways.

A question to consider is whether the patient, P, bears any responsibility for the events in this case, particularly by allowing his teeth to fall into such disrepair, all at his own hand, and for waiting until the virtual eve of knee surgery before seeking to address his dental problems. States vary in their handling of this type of issue during the course of litigation. But even when a particular jurisdiction allows for claims by the defendant against the plaintiff that might greatly reduce or completely eliminate monetary compensation, it becomes a strategic question for defense counsel (and the dentist's malpractice carrier) as to whether there is value in going down that road, with the specter of the potential for a jury to be angered by the attempt to "blame the victim." Litigation is a process that includes facts, law, strategy, ethics, and assessments of human nature, complex and intellectually stimulating.

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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

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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.

Canceled Joint Replacement Results from Dentist’s Lack of Awareness

Learn how a dentist’s lack of awareness of new protocols can lead to major inconveniences for a patient.

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.