Kupershmidt Irit, Levin Liran, Schwartz-Arad Devorah
Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
J Periodontol. 2007 Jun;78(6):991-6. doi: 10.1902/jop.2007.060443.
The purpose of this study was to evaluate inter-implant bone crest height changes between immediate and non-immediate dental implants placed in the anterior maxillary region.
A retrospective study was conducted on consecutively treated patients requiring at least two adjacent implants in the anterior maxillary region that were placed in the same operation during 1994 to 2004. Files of 45 healthy patients reporting 200 implants were reviewed. Age, gender, smoking status, and implant characteristics (coating and dimensions) were recorded. Inter-implant bone measurements were taken on two panoramic radiographs from each patient: one after implant placement and the other at the last follow-up. The distance between adjacent implants was measured at the implant-abutment interface (implant platform).
Overall, 130 inter-implant gaps were found. Follow-up ranged from 8 to 146 months. Two-tailed Pearson correlation tests revealed a negative correlation between inter-implant distance and bone loss (P = 0.036). Mean peak-crest bone loss for immediate implants was higher than for delayed implants (P = 0.026). There was more bone loss when hydroxyapatite (HA)-coated implants were used, although no statistical significance was observed. No statistically significant difference was found between the different locations in the anterior maxilla. No correlation was found between patient's age, smoking habits, and bone loss or between follow-up time and bone loss.
A negative correlation was found between inter-implant distance and bone loss at the inter-implant bone crest in the anterior maxillary region. Bone loss was small in this study cohort.
本研究的目的是评估在上颌前部区域即刻种植与非即刻种植的种植体间牙槽嵴高度变化。
对1994年至2004年期间连续接受治疗、上颌前部区域至少需要植入两颗相邻种植体且在同一手术中植入的患者进行回顾性研究。回顾了45例健康患者报告的200颗种植体的档案。记录年龄、性别、吸烟状况和种植体特征（涂层和尺寸）。从每位患者的两张全景X线片上进行种植体间骨测量：一张在种植体植入后，另一张在最后一次随访时。在种植体-基台界面（种植体平台）测量相邻种植体之间的距离。
总体而言，共发现130个种植体间间隙。随访时间为8至146个月。双尾Pearson相关性检验显示种植体间距离与骨吸收之间呈负相关（P = 0.036）。即刻种植体的平均牙槽嵴顶骨吸收高于延期种植体（P = 0.026）。使用羟基磷灰石（HA）涂层种植体时骨吸收更多，尽管未观察到统计学意义。上颌前部不同位置之间未发现统计学显著差异。未发现患者年龄、吸烟习惯与骨吸收之间或随访时间与骨吸收之间存在相关性。
在上颌前部区域，种植体间距离与种植体间牙槽嵴顶骨吸收之间呈负相关。本研究队列中的骨吸收较小。
