Abstract
Background
The removal of mandibular third molar teeth is one of the most common oral surgical procedures. In a significant number of patients it carries a degree of associated morbidity, including damage to the inferior alveolar nerve (IAN). For this reason, practitioners desire the most up-to-date guidance on the most appropriate technique, informed by the best available evidence that will produce the lowest incidence of iatrogenic complications.
Objective
Perform a systematic review comparing the effect of coronectomy versus complete surgical extraction of mandibular third molar teeth on the risk of IAN injury and other complications in adults.
Data Sources
Studies were identified through Embase (1980-2015) and Ovid MEDLINE (1946-2015) database searches. Search terms included coronectomy, partial root removal, deliberate vital root retention, odontectomy, surgical removal, surgical extraction, complete tooth extraction, and extract*. Limits included humans, English language, and randomized controlled trials (RCTs).
Inclusion criteria
Only RCTs comparing IAN damage associated with surgical extraction of mandibular third molars versus coronectomy were included.
Results
From our database searches, we identified two unique RCTs matching the inclusion criteria. Both evaluated patients who had specific radiographic signs of intimate relationships with the IAN. Upon detailed analysis, the studies were noted to exhibit a high risk of bias in many categories, thereby rendering their results inconclusive.
Conclusion
Although evidence from two RCTs suggests that coronectomy can reduce the risk of IAN injury compared to surgical removal of high-risk mandibular third molars, the quality of evidence is insufficient to provide definitive conclusions regarding the preferred technique.
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