Ayubianmarkazi Nader, Deporter Douglas, Dastgurdi Maziar Ebrahimi, Akhondi Nasrin, Ketabi Mohammad
Department of Periodontics, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
Department of Periodontology, Faculty of Dentistry, University of Toronto, Canada.
Dent Res J (Isfahan). 2022 Aug 16;19:66. eCollection 2022.
When immediate molar implants first were proposed, submerged initial healing and delayed loading were the norm. It is now recognized that some early loading of a nonocclusal nature can stimulate faster osseointegration, although full occlusal loading is still delayed for 3 or more months. Here, we test the hypothesis that earlier occlusal loading of mandibular premolar and molar immediate implants may be possible. In this retrospective case series study, 18 mandibular molar and nine mandibular premolar teeth were atraumatically extracted and immediate implants placed 1-2 mm apical to buccal and lingual crestal bone. Periimplant gaps received particular allograft covered with acellular dermal matrix barrier. Healing abutments were placed through puncture points in the membranes to help in stabilizing the latter and to permit nonsubmerged site healing. At 6-8 weeks, each implant was evaluated for stability using the Periotest® device and restored if the Periotest® (PTV) value seen was negative. Data were analyzed by t test and MannWhitney U at a significance level of < 0.05. Retrospective assessment of all 27 implants after 5 years' period of follow up showed all implants to have survived. Overall mean crestal bone loss was determined to be-0.25 ± 0.54 mm. Individual mean bone levels for mesial and distal surfaces were-0.24 ± 0.77 mm and-0.26 ± 0.72 mm, respectively ( = 0.78). A statistically significant difference in bone loss between genders was detected. Overall mean probing depth was 2.09 ± 0.57 mm. Based on the widely used Albrektsson criteria, the overall survival and success rate was 100%. Immediate implants placed into mandibular premolar and molar extraction sockets and allowed nonsubmerged healing may be ready for restoration at earlier times than previously thought possible.
当首次提出即刻磨牙种植时，初期采用潜入式愈合和延期负重是常规做法。现在人们认识到，一些非咬合性质的早期负重可以刺激更快的骨整合，尽管完全咬合负重仍需延迟3个月或更长时间。在此，我们检验了一个假设，即下颌前磨牙和磨牙即刻种植可能可以更早进行咬合负重。在这项回顾性病例系列研究中，18颗下颌磨牙和9颗下颌前磨牙被无创拔除，并在颊侧和舌侧牙槽嵴顶骨根尖1 - 2毫米处植入即刻种植体。种植体周围间隙使用覆盖有脱细胞真皮基质屏障的同种异体骨移植材料进行特殊处理。通过膜上的穿刺点放置愈合基台，以帮助稳定膜并允许非潜入式位点愈合。在6 - 8周时，使用Periotest®设备评估每个种植体的稳定性，如果观察到的Periotest®（PTV）值为阴性，则进行修复。数据采用t检验和Mann - Whitney U检验进行分析，显著性水平为< 0.05。对所有27颗种植体进行5年随访后的回顾性评估显示，所有种植体均存活。总体平均牙槽嵴骨吸收量确定为 - 0.25 ± 0.54毫米。近中面和远中面的个体平均骨水平分别为 - 0.24 ± 0.77毫米和 - 0.26 ± 0.72毫米（= 0.78）。检测到不同性别之间的骨吸收存在统计学显著差异。总体平均探诊深度为2.09 ± 0.57毫米。根据广泛使用的Albrektsson标准，总体存活率和成功率为100%。植入下颌前磨牙和磨牙拔牙窝并允许非潜入式愈合的即刻种植体可能比以前认为的更早可以进行修复。
