Analysis of risk factors of alveolar bone defect and inferior alveolar nerve injury after extraction of impacted mandibular third molar

doi:10.19438/j.cjoms.2018.05.011

Abstract

Abstract: PURPOSE: To investigate the influencing factors of alveolar bone defect and inferior alveolar nerve (IAN) injury after mandibular mesially impacted third molar extraction, and to provide reference for future development of more targeted preventive measures. METHODS: The clinical data, imaging data and follow-up data of 500 cases of mandibular impacted third molar extraction were retrospectively analyzed, and the data of the patients with no alveolar bone defect and IAN injury were compared and analyzed. The independent risk factors of alveolar bone defect and IAN injury were analyzed by logistic regression analysis with SPSS 18.0 software package. RESULTS: In 500 patients, 52 (10.40%) had IAN damage. Single factor analysis and Logistic regression analysis showed that the age of patients, surgical incision, dental instruments, dental surgery, postoperative complications (hematoma, infection, dry socket) were factors of alveolar bone defect and IAN injury (P<0.05). CONCLUSIONS: The age of patients, anatomical structure of the impacted third molar, the relationship between the anatomical structure, the position of the root and the mandibular canal should be fully investigated before operation, in order to prevent and minimize postoperative complications.

Key words: Mandibular mesially impacted third molar, Alveolar bone defect, Inferior alveolar nerve injury, Risk factors

CLC Number:

R782.1

SUN Lei, ZHAO Qi-rong, ZHENG Hao. Analysis of risk factors of alveolar bone defect and inferior alveolar nerve injury after extraction of impacted mandibular third molar[J]. China Journal of Oral and Maxillofacial Surgery, 2018, 16(5): 441-444.

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