Surgical Management and Complications of Mandibular Third Molars

Mandibular third molars frequently present as partially or fully impacted teeth requiring surgical management. Extraction techniques span full odontectomy with tooth sectioning to coronectomy when intimate proximity to the inferior alveolar nerve heightens risk. Preoperative evaluation has evolved from panoramic radiography to three-dimensional cone-beam computed tomography (CBCT), improving visualisation of root morphology, bone quality and nerve position. Surgical planning integrates angulation classifications and alveolar bone thickness profiles to determine buccal or lingual access, flap design, osteotomy and sectioning parameters. Intraoperative priorities include atraumatic manipulation, nerve preservation and avoidance of mandibular fractures, sometimes aided by custom fixation devices. Postoperative complications such as inferior alveolar or lingual nerve injury, dry socket, trismus, infection and swelling vary with patient age, root anatomy and surgeon experience. Advances in image guidance, standardised protocols and biomaterial implants are converging to enhance safety, predictability and patient outcomes worldwide.

Research from Nature Portfolio

A foundational study introduced a CBCT-based classification of deeply impacted mandibular third molars according to bucco-lingual alveolar bone thickness, defining buccal, central and lingual types. This scheme correlates with the course of the inferior alveolar canal and informs the optimal surgical approach. The predominance of the lingual type in deeply impacted cases highlights the need for tailored access strategies. By standardising anatomical descriptors, this framework enhances preoperative planning, facilitates inter-centre communication and may reduce iatrogenic nerve injuries across diverse practice settings.

Surgical Management and Complications of Mandibular Third Molars publication trend

The graph below shows the total number of articles in surgical management and complications of mandibular third molars across all publications each year (not limited to Nature Index journals).

Technical terms

Impacted mandibular third molar: A wisdom tooth in the lower jaw that fails to fully erupt due to obstruction by bone or adjacent teeth.

Coronectomy: A surgical technique in which the crown of an impacted tooth is removed while retaining the roots to reduce risk of nerve injury.

Inferior alveolar nerve: A sensory branch of the mandibular nerve that traverses the mandible, supplying sensation to lower teeth, chin and lower lip.

Cone-beam computed tomography (CBCT): A volumetric imaging modality providing high-resolution three-dimensional views of maxillofacial structures for precise surgical planning.

Bucco-lingual alveolar bone thickness: The horizontal width of the jawbone measured between the cheek (buccal) and tongue (lingual) aspects around a tooth.

References

1. Customized Titanium Plates for Preventing Mandibular Fractures in Lower Third Molar Extractions. Journal of Functional Biomaterials (2025).
2. Application of Cone Beam Computed Tomography in Risk Assessment of Lower Third Molar Surgery. Diagnostics (2023).
3. Establishing universal sectioning depth and angle for surgical coronectomy of impacted mandibular third molars: an imaging-based study. Frontiers in Oral Health (2024).
4. Variations in the buccal-lingual alveolar bone thickness of impacted mandibular third molar: our classification and treatment perspectives. Scientific Reports (2016).