CLINICAL FEATURES AND PARACLINICAL OF THIRD MOLAR TOOTH IN THE CLOSED RELATIONSHIP WITH INFERIOR ALVEOLAR NERVE IN CORONECTOMY

Ngoc Khanh Vinh Kim1,, Thi Phuong Dan Tran1, Nhut Tan Lam1
1 Can Tho University of Medicine and Pharmacy

Main Article Content

Abstract

Background: Injury of the inferior alveolar nerve (IAN) is a significant risk factor after the removal of an impacted third molar. Examining and identifying root risk factors related to the inferior alveolar nerve is an important step. Preoperative panoramic radiography and Conbeam computed tomography (CBCT) are essential to identify the root signs relevant to the inferior alveolar nerve. Objectives: Describe the clinical and radiographic features of the mandibular third molar with the inferior alveolar nerve involvement in patients undergoing coronectomy surgery. Materials and methods: 36 patients who were indicated for coronectomy surgery were diagnosed with lower third molar teeth in a closed relationship with the inferior alveolar nerve. Use a crosssectional descriptive study.  Results: The rate accounted for the highest proportion in the group of 18-25(77.8%), the proportion of the features are: Class II Pell-Gregory (97.2%), Class A PellGregory (86.1%), horizontal and mesioangular position (47.2%), loss of lamina dura of canal(44.4%), cortication of canal appears(50%), cortication of the canal is disappeared(33.3%), the inferior position(52.8%). Conclusions: The proportion of mandibular third molar roots related to the inferior alveolar nerve is quite high and is most common at the root apex, lossing of lamina dura of the canal are the most common sign on radiographs in these cases. Surveying the neurological signs of the mandibular third molar tooth root on panoramic film is very important to indicate a safe surgical method to limit the complications of nerve damage.

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References

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