临床上，常规拔牙后牙槽骨的自然愈合存在不同程度的牙槽骨吸收［1］，影响未来的种植体植入修复位置，角度及软、硬组织处理。研究表明，采取微创拔牙和位点保存技术可以减少牙槽骨吸收，显著保留牙槽嵴宽度及高度［2-3］，减少或避免种植治疗同期实施复杂的植骨手术。另有文献指出，种植体周围至少需要2 mm的角化龈及1 mm的附着龈，方能维护种植体周围组织健康，获得长期稳定疗效。本研究完整展示了1例针对牙周牙髓联合病变磨牙的病情分析，采取微创拔牙结合位点保存和游离龈移植术创造良好软、硬组织条件，获得最终较好种植修复效果的具体实施步骤，积累了针对此类问题的临床经验。

For ideal implant rehabilitation, an adequate bone volume, optical implant position, and stable and healthy soft tissue are required. The reduction of alveolar bone and changes in its morphology subsequent to tooth extraction will result in insufficient amount of bone and adversely affect the ability to optimally place dental implants in edentulous sites. Preservation of alveolar bone volume through ridge preservation has been demonstrated to reduce the vertical and horizontal contraction of the alveolar bone crest after tooth extraction and reduce the need for additional bone augmentation procedures during implant placement. In this case, a patient presented with a mandible molar of severe periodontal disease, the tooth was removed as atraumatically as possible and the graft material of Bio-Oss was loosely placed in the alveolar socket without condensation and covered with Bio-Gide to reconstruct the defects of the alveolar ridge. Six months later, there were sufficient height and width of the alveolar ridge for the dental implant, avoiding the need of additional bone augmentation and reducing the complexity and unpredictability of the implant surgery. Soft tissue defects, such as gingival and connective tissue, played crucial roles in long-term implant success. Peri-implant plastic surgery facilitated development of healthy peri-implant structure able to withstand occlusal forces and muco-gingival stress. Six months after the implant surgery, the keratinized gingiva was absent in the buccal of the implant and the vestibular groove was a little shallow. The free gingival graft technique was used to solve the vestibulum oris groove supersulcus and the absence of keratinized gingiva around the implant. The deepening of vestibular groove and broadening of keratinized gingiva were conducive to the long-term health and stability of the tissue surrounding the implant. Implant installation and prosthetic restoration showed favorable outcome after six months.