【摘要】 为了探讨下颌后牙游离缺失存在刃状牙槽嵴时的治疗方法，本病例采用二次骨劈开配合引导骨再生（GBR）后延期种植。针对下颌牙槽嵴顶宽度不足，符合骨劈开适应证的患者，实施二阶段骨劈开：首次手术行骨皮质劈开以促进骨改建；术后1个月行二次骨劈开并同期植入种植体，联合GBR完成水平骨增量。结果可见水平骨量（牙槽骨宽度）增加4～5 mm，满足了临床种植要求，同时减少了种植过程中种植体颊舌侧暴露的风险，减少了手术创伤，缩短了治疗周期，但2年后随访发现术区颊侧骨板存在吸收（0.1～0.3 mm/年）。因此，二次骨劈开式种植法为下颌后牙区牙槽嵴重度狭窄（宽度≤3 mm）患者提供诊疗选择，但需关注远期骨吸收问题。更多还原

【Abstract】 This paper report a case of delayed implantation using staged ridge split combined with guided bone regeneration(GBR) in a patient with a knife-edge alveolar ridge due to free-end edentulism in the posterior mandible. For a patient with insufficient alveolar ridge crest width in the mandible who met the indications for ridge splitting, a two-stage ridge split was performed. The first surgery involved splitting the cortical bone to promote bone remodeling. One month later, a second ridge split was carried out with simultaneous implant placement, combined with GBR to achieve horizontal ridge augmentation. The horizontal alveolar bone width increased by 4～5 mm, meeting clinical requirements for implantation while reducing the risk of buccolingual implant exposure, minimizing surgical trauma, and shortening the treatment period. However, a two-year follow-up revealed buccal bone plate resorption in the surgical area at a rate of 0.1～0.3 mm/year. The staged ridge split technique provides a treatment option for patients with severe horizontal alveolar ridge deficiency(width ≤ 3 mm) in the posterior mandible, but attention should be paid to the issue of long-term bone resorption.更多还原