Ghensi P, Stablum W, Bettio E, Soldini M C, Tripi T R, Soldini C
Centre for Integrative Biology (CIBIO), University of Trento, Trento, Italy; IDIS (Institute for Dental & Implant Studies); Department of Neurosciences, University of Padova, Padova, Italy.
IDIS (Institute for Dental & Implant Studies).
Oral Implantol (Rome). 2017 Nov 30;10(3):335-342. doi: 10.11138/orl/2017.10.3.335. eCollection 2017 Jul-Sep.
Guided bone regeneration (GBR) is a well-established and generally predictable method for repairing alveolar ridge defects and preparing edentulous sites for implant placement. Standard GBR involves filling the space underneath a membrane with autogenous bone or a mixture composed of autogenous bone particles and allogeneic bone tissue or heterologous biomaterials. The use of a barrier membrane for GBR has sometimes been associated with complications, however - reportedly involving exposure, infection, and collapse - and the non-resorbable types of membrane seem to be involved more often than the resorbable solutions. Such complications may be severe enough to defeat the object of the GBR procedure. A non-resorbable high-density polytetrafluoroethylene (d-PTFE) membrane has recently been designed specifically for use in bone-augmentation procedures that seems to assure a good bone regeneration process even when the membrane is exposed to the oral cavity. This case report describes an exposure of a d-PTFE membrane occurring after a maxillary GBR procedure and how it was overcome successfully, enabling implants insertion.
引导骨再生（GBR）是一种成熟且通常可预测的方法，用于修复牙槽嵴缺损并为种植体植入准备无牙部位。标准GBR包括用自体骨或由自体骨颗粒与同种异体骨组织或异种生物材料组成的混合物填充膜下方的空间。然而，GBR使用屏障膜有时会出现并发症——据报道包括暴露、感染和塌陷——而且不可吸收类型的膜似乎比可吸收膜更容易出现此类情况。这些并发症可能严重到足以使GBR手术的目标落空。一种不可吸收的高密度聚四氟乙烯（d-PTFE）膜最近专门设计用于骨增量手术，即使该膜暴露于口腔中，似乎也能确保良好的骨再生过程。本病例报告描述了上颌GBR手术后发生的d-PTFE膜暴露情况以及如何成功克服该问题，从而能够植入种植体。
