Nayana Prabhu, Nayak Sunil S, Chatterjee Abhirup, Sivaraman Karthik, Srikanth Gadicherla, Singh Chhavi
Department of Prosthodontics, Manipal College of Dental Sciences, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka.
Department of Oral and Maxillofacial Surgery, Manipal College of Dental Sciences, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka.
J Int Soc Prev Community Dent. 2022 Jun 29;12(3):287-294. doi: 10.4103/jispcd.JISPCD_318_21. eCollection 2022 May-Jun.
Implant abutment screws can fracture due to various biomechanical factors. Improper fit of the prosthesis, inadequate seating of the abutment, occlusal interference, and manufacturing errors are some of the causes that can result in an abutment screw fracture. Retrieval of the retained fractured abutment screw is quite challenging to the clinician. The objective of this review is to provide information on various fractured abutment screw retrieval techniques reported in literature and to formulate a structured treatment protocol for the management of fractured abutment screws.
An electronic search of Scopus and PubMed databases was performed for articles between January 1989 and December 2021 using the keywords "Implant screw fracture" and "screw retrieval."
Most of the articles were of the opinion that abutment screw fractures occurred due to screw loosening. Both conservative approaches and the use of commercial retrieval kits have been advocated to retrieve the fractured abutment screws. Based on various review articles, an innovative novel technique to retrieve an abutment screw fractured due to excessive torque was devised in our unit.
Although clinicians can use various techniques to remove fractured abutment screws, every effort should be made to eliminate the cause of screw fracture. Retrieval of the broken screw fragment should be done judiciously to prevent any internal damage to the implant structure.
种植体基台螺丝可能因各种生物力学因素而断裂。假体适配不当、基台就位不足、咬合干扰和制造误差是可能导致基台螺丝断裂的一些原因。取出残留的断裂基台螺丝对临床医生来说颇具挑战性。本综述的目的是提供文献中报道的各种断裂基台螺丝取出技术的信息，并制定一个结构化的治疗方案来处理断裂的基台螺丝。
使用关键词“种植体螺丝断裂”和“螺丝取出”，对1989年1月至2021年12月期间Scopus和PubMed数据库中的文章进行电子检索。
大多数文章认为基台螺丝断裂是由于螺丝松动所致。有人主张采用保守方法和使用商用取出套件来取出断裂的基台螺丝。基于各种综述文章，我们科室设计了一种创新的新技术来取出因扭矩过大而断裂的基台螺丝。
尽管临床医生可以使用各种技术来取出断裂的基台螺丝，但应尽一切努力消除螺丝断裂的原因。取出断裂的螺丝碎片时应谨慎操作，以防止对种植体结构造成任何内部损伤。
