Mendonça Gustavo, Mendonça Daniela Baccelli Silveira, Fernandes-Neto Alfredo Júlio, Neves Flávio Domingues
Department of Prosthodontics, Catholic University of Brasilia, Brasilia, Brazil.
Implant Dent. 2009 Feb;18(1):10-6. doi: 10.1097/ID.0b013e318192cafe.
An implant fracture may be one of the major causes of late implant failures. Complications, such as loosening or fracture of the prosthesis restorative components, or even fracture of the implant, may occur and dental professionals should be aware of the causes of these complications. This study reports a clinical situation involving a patient restored with a mandibular overdenture that presented a fractured implant 2 years after placement. The probable cause of the implant fracture was due to biomechanical overload caused by parafunctional habits. The implant head was flattened to make it smooth, retapping the internal screw, installing a new abutment (longer), and fabricating part of the overdenture bar. This treatment was timesaving for the patient in that the prosthesis was repaired in the shortest time possible.
种植体折断可能是种植体后期失败的主要原因之一。可能会出现诸如修复部件松动或折断甚至种植体折断等并发症，牙科专业人员应了解这些并发症的成因。本研究报告了一例临床情况，一名患者下颌覆盖义齿修复后，种植体在植入2年后发生折断。种植体折断的可能原因是由异常功能习惯导致的生物力学过载。将种植体头部磨平使其光滑，重新攻丝内螺纹，安装新的（更长的）基台，并制作覆盖义齿杆的一部分。这种治疗方法为患者节省了时间，因为义齿在尽可能短的时间内得到了修复。
