Kan J Y, Lozada J L, Boyne P J, Goodacre C J, Rungcharassaeng K
Center for Prosthodontics and Implant Dentistry, Loma Linda University School of Dentistry, California 92350, USA.
Int J Oral Maxillofac Implants. 1997 Sep-Oct;12(5):655-9.
A patient with a severely atrophic right posterior mandible had three endosseous implants placed in conjunction with transposition of the inferior alveolar nerve. Three weeks following implant placement surgery, the patient experienced a spontaneous fracture of the mandible involving the two anterior implants. The two implants were removed, and the fracture was treated with open reduction and fixation with titanium mesh. The fracture healed, and the posterior implant integrated. This report suggests that the buccolingual and superior-inferior position of the mandibular canal can increase the possibility of mandibular fracture by increasing the size of the buccal cortical plate that is removed to expose the nerve during surgery.
一名右下颌后牙区严重萎缩的患者接受了3枚骨内种植体植入，并同时进行了下牙槽神经移位术。种植体植入手术3周后，患者下颌骨发生自发性骨折，累及2枚前部种植体。取出这2枚种植体，骨折采用切开复位并用钛网固定治疗。骨折愈合，后部种植体成功骨结合。本报告提示，下颌管的颊舌向及上下位置会因增加手术中为暴露神经而去除的颊侧皮质骨板面积，从而增加下颌骨骨折的可能性。
