Wu Ivy H, Bakhshalian Neema, Galaustian Razmik, Naini Roshanak Baghai, Min Seiko, Freire Marcelo, Zadeh Homayoun H
Int J Periodontics Restorative Dent. 2019 Jan/Feb;39(1):131-140. doi: 10.11607/prd.3308.
The objective of this study was to investigate marginal bone level (MBL) changes as the primary outcome of implants placed following healing of extraction sockets treated with ridge preservation, compared to implants placed following unassisted healing. A total of 268 patients (contributing 572 implants) treated from April 2005 to March 2013 were included in this retrospective study. Following estimation of the overall success rate of implants placed in the practice, 129 patients (contributing 222 implants) met the inclusion and exclusion criteria to be further evaluated. Of these, 78 patients (contributing 105 implants) received ridge preservation procedures, which entailed placement of anorganic bovine bone mineral covered with polytetrafluoroethylene membrane. The other 51 patients (contributing 117 implants), with healed sites without history of bone grafting, served as controls. Digital radiographs were taken at the time of implant placement and during follow-up visits. The mean follow-up period for ridge preservation sites was 33.6 months (range: 7.5 to 61.5 months) and for healed sites was 36.3 months (range: 6 to 91.2 months). The survival rate of implants in sites following healing of ridge preservation was 97.3%, compared to 98.5% in the nongrafted healed sites. The mean MBL changes during the observation period were 0.11 and 0.07 mm on the mesial and 0.06 and 0.06 mm on the distal aspects of the ridge preservation and healed sites, respectively (P > .05). The mean crestal bone remodeling during the observation period was 0.63 and 0.45 mm on the mesial and 0.48 and 0.12 mm on the distal aspects in the ridge preservation and healed sites, respectively (P < .05). The results of this study demonstrated stable MBL and survival of implants placed in sites following ridge preservation with xenograft as well as nongrafted healed sites.
本研究的目的是调查作为牙槽嵴保存治疗拔牙窝愈合后植入种植体的主要结果的边缘骨水平（MBL）变化，与未辅助愈合后植入的种植体相比。本回顾性研究纳入了2005年4月至2013年3月期间接受治疗的268例患者（共植入572颗种植体）。在评估该机构中植入种植体的总体成功率后，129例患者（共植入222颗种植体）符合纳入和排除标准，需进一步评估。其中，78例患者（共植入105颗种植体）接受了牙槽嵴保存程序，该程序包括放置覆盖有聚四氟乙烯膜的无机牛骨矿物质。另外51例患者（共植入117颗种植体），其愈合部位无骨移植史，作为对照。在种植体植入时和随访期间拍摄数字化X线片。牙槽嵴保存部位的平均随访期为33.6个月（范围：7.5至61.5个月），愈合部位的平均随访期为36.3个月（范围：6至91.2个月）。牙槽嵴保存愈合部位种植体的存活率为97.3%，未移植愈合部位为98.5%。在观察期内，牙槽嵴保存部位和愈合部位近中MBL变化的平均值分别为0.11和0.07mm，远中分别为0.06和0.06mm（P>.05）。在观察期内，牙槽嵴保存部位和愈合部位近中嵴顶骨重塑的平均值分别为0.63和0.45mm，远中分别为0.48和0.12mm（P<.05）。本研究结果表明，在异种移植牙槽嵴保存部位以及未移植愈合部位植入的种植体具有稳定的MBL和存活率。
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