前牙区GBR后种植体唇侧颈部骨增量材料吸收及原因分析

Resorption of bone graft materials in labial neck of implant after guided bone regeneration in anterior teeth area:a case report and cause analysis

本文报道1例常规种植同期GBR,术后6个月种植体唇侧骨增量效果良好,但颈部区域骨增量材料吸收明显,二期手术同期行游离结缔组织移植,最终获得了良好的软组织轮廓的病例。通过分析前牙区GBR后种植体唇侧颈部骨增量材料吸收的原因,总结前牙区骨增量的操作注意事项。前牙区进行GBR应充分考虑生物膜及骨增量材料的稳定性和空间维持能力,可使用膜钉辅助固位,或使用空间维持能力较强的屏障膜。当骨增量无法达到预期效果时,可通过软组织增量进行补偿,以获得良好的软组织轮廓及理想的美学效果。

The paper reports a case with good effect of bone augmentation after 6 months following conventional implant placement and guided bone generation(GBR),but the resorption of bone graft materials at the labial side of the implant neck was obvious.Therefore,free connective tissue graft was carried out at the same time during the second stage of operation and an ideal soft tissue contour was finally obtained.We also analyze the causes of bone graft materials resorption at the labial side of the implant neck after GBR in the anterior teeth area and summarize operation precautions of bone augmentation in the anterior teeth area.The stability and space maintenance ability of biomembrane and bone graft material should be fully considered when GBR is performed in the anterior tooth area.Titanium pins or barrier membranes with strong space maintenance ability can be used to assist retention.When the bone augmentation cannot achieve the expected effect,it can be compensated by the soft tissue graft to obtain a good soft tissue contour and ideal aesthetic effect.