Wisdom Teeth: When Extraction Is Necessary

The real clinical indications for third molar extraction, why routine prophylactic extraction is no longer recommended, and the main complications to weigh before the procedure.

Third molars, commonly known as wisdom teeth, are the last teeth to erupt, typically between ages 17 and 25, and are also the ones with the greatest anatomical variability and the highest frequency of total or partial impaction, due to frequently insufficient arch space. For decades, prevailing clinical practice favored routine prophylactic extraction of all third molars, including asymptomatic ones with no evidence of pathology. This approach has been progressively revised: prophylactic extraction of an asymptomatic third molar, free of signs of pathology and with no radiographic evidence of risk, generally isn't recommended, and should be assessed case by case rather than applied as an automatic rule.

The real clinical indications for extraction include: recurring episodes of pericoronitis (inflammation of the gum tissue partly covering an impacted tooth, often painful and sometimes associated with trismus or swallowing difficulty); untreatable caries on the third molar or, due to proximity, on the adjacent second molar; root resorption of the neighboring tooth caused by pressure from the impacted third molar; cysts or other pathological lesions associated with the pericoronal follicle; and specific orthodontic needs, when the third molar's presence interferes with a defined treatment plan.

Radiographic classification of the impacted third molar's position and angulation (mesioangular, distoangular, vertical, horizontal) and its depth relative to the second molar's occlusal plane are decisive factors in assessing expected surgical difficulty and estimating complication risk, not just in deciding whether to extract.

The main complications to discuss with the patient before the procedure include damage to the inferior alveolar or lingual nerve, resulting in temporary or, more rarely, permanent numbness; post-extraction alveolitis (so-called "dry socket"), particularly common with impacted mandibular third molars; swelling and trismus in the days immediately following; and, for maxillary third molars in close proximity to the maxillary sinus, the risk of an oro-antral communication. Thorough informed consent, explaining these risks in proportion to the actual complexity of the specific case, remains an essential step before proceeding.

On Oralzon you'll find surgical instrumentation for third molar extraction, including oral surgery kits, suture materials and post-operative care supplies.