Abstract:

To study the effect of gap increasing resulted from orthodontic traction on the extraction of the mandibular third molar(M3) in close relationship with the inferior alveolar nerve and lingual bone. Eight vertically impacted M3s were included because they were proven to be adjacent to both the inferior alveolar nerve and the lingual bone by means of the cone-beam CT(CBCT). The miniscrews were used to enhance the anchorage and the NiTi cantilever beam were used to exert the buccal traction force for 4-6 weeks. When the traction points on the M3s moved buccally over 2 mm, they were extracted. After extraction, no patients showed any serious complications. Gap increasing resulted from orthodontic traction could reduce the risk of the extraction of the M3 adjacent to both the inferior alveolar nerve and the lingual bone

Key words: traction, gap increasing, impacted mandibular third molar, cantilever beam

摘要：

探索牵引增隙辅助拔除紧邻下牙槽神经管和舌侧骨板低位阻生智齿的效果。锥形束CT（cone-beam CT,CBCT）显示紧邻下牙槽神经管和舌侧骨板的垂直阻生智齿8例，微种植钉增强支抗，NiTi悬臂梁颊向牵引智齿4~6周，当牵引点颊向移动距离>2 mm后转外科拔除。所有智齿拔除后均未出现严重并发症。牵引增隙可有效降低拔除紧邻下牙槽神经管和舌侧骨板垂直阻生智齿的风险。

关键词: 牵引, 增隙, 下颌阻生智齿, 悬臂梁

CLC Number: 

• R782