Bashutski Jill D, D'Silva Nisha J, Wang Hom-Lay
Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA.
J Periodontol. 2009 Apr;80(4):700-4. doi: 10.1902/jop.2009.080581.
Implants fail for a variety of reasons; it can be difficult to determine the exact cause of failure, especially if there are multiple contributing factors. Overcompression of the adjacent bone during implant placement is a potential contributing factor to implant failure that is not well documented in the literature.
This case report reviews the concept of bone loss induced by overcompression and presents a case of implant failure with overcompression as a potential etiology. Histology, radiographs, and clinical data are presented that document the failure of four implants placed in the posterior mandible of a 48-year-old female patient.
After uneventful implant placement, one implant exfoliated 3 weeks postoperatively. The other three implants were removed because of severe bone loss up to 2 months later. Histology of the area revealed non-viable bony sequestra with bacterial colonization.
This case highlights unusual implant failures that likely occurred as a result of overcompression of the bone during placement. Areas involving dense bone seem to be at increased risk for compression necrosis.
种植体失败的原因多种多样；很难确定失败的确切原因，尤其是存在多种促成因素时。种植体植入过程中相邻骨组织的过度压缩是种植体失败的一个潜在促成因素，而这在文献中记载并不充分。
本病例报告回顾了过度压缩导致骨丢失的概念，并呈现了一例以过度压缩为潜在病因的种植体失败病例。文中展示了组织学、X光片及临床数据，记录了一名48岁女性患者下颌后部植入的4枚种植体的失败情况。
种植体植入过程顺利，但其中一枚在术后3周脱落。另外三枚种植体在术后2个月因严重骨丢失而被取出。该区域的组织学检查显示存在带有细菌定植的无活力骨块。
本病例突出了因植入过程中骨组织过度压缩而可能导致的异常种植体失败情况。涉及致密骨的区域似乎发生压缩性坏死的风险更高。
