Perry Michael, Hodges Nathan, Hallmon D William, Rees Terry, Opperman Lynne A
Texas A&M University System Health Science Center, Baylor College of Dentistry, Department of Biomedical Sciences, Dallas, TX 75246, USA.
Int J Oral Maxillofac Implants. 2005 Sep-Oct;20(5):695-702.
The primary goal of this study was to compare bone-to-implant contact (BIC) in alveolar bone augmented by distraction osteogenesis with BIC in alveolar bone augmented by onlay iliac crest grafting.
Alveolar bone defects were created bilaterally in 5 American foxhounds, and after healing, bone augmentation was accomplished using distraction osteogenesis on 1 side of the jaw and onlay grafting on the other. Twelve weeks after consolidation, implants were placed in augmented and control sites. The animals were sacrificed and the jaws harvested for histologic analysis after an additional 8 weeks.
The mean BIC was 54.7% +/- 14.6% for implants placed in distracted sites, 53.8% +/- 11.8% for sites where an onlay graft was used, and 51.2% +/- 14.4% for control sites. Significant differences in BIC were noted between experimental and control sites only at the apical third of the implant (19.8 +/- 1.8 for distracted sites; 15.5 +/- 1.5 for grafted sites; 8.0 +/- 0.5 for control sites; P < .05).
The data showed that both distraction osteogenesis and onlay grafting produce sufficient bone for implant placement. There were no differences between procedures in regard to BIC after 8 weeks.
These data suggest that both onlay grafting and vertical distraction are appropriate methods for bone augmentation prior to implant placement.
本研究的主要目的是比较牵张成骨术增加牙槽骨后的骨与种植体接触（BIC）与髂骨块移植增加牙槽骨后的BIC。
在5只美国猎狐犬双侧制造牙槽骨缺损，愈合后，一侧下颌采用牵张成骨术增加骨量，另一侧采用块状移植术。巩固12周后，在增加骨量的部位和对照部位植入种植体。再过8周后处死动物，取下颌骨进行组织学分析。
牵张部位植入种植体的平均BIC为54.7%±14.6%，采用块状移植部位的为53.8%±11.8%，对照部位的为51.2%±14.4%。仅在种植体根尖三分之一处，实验部位与对照部位的BIC有显著差异（牵张部位为19.8±1.8；移植部位为15.5±1.5；对照部位为8.0±0.5；P<.05）。
数据表明，牵张成骨术和块状移植术均可产生足够的骨量用于种植体植入。8周后，两种手术方法在BIC方面无差异。
这些数据表明，块状移植术和垂直牵张术都是种植体植入前增加骨量的合适方法。
