牙周牵张成骨拔牙法位点保存效果的对比研究

Contrastive study on alveolar ridge preservation: Tooth extraction through dentoalveolar distraction

目的用牙周牵张成骨法进行位点保存,研究其对牙槽骨量保存所起到的作用。方法 Beagle犬12只,随机分3组,实验组选择下颌一侧第三前磨牙行牙周牵张成骨拔牙(dentoalveolar distraction extraction,DDE),对照组1为传统拔牙自然愈合组(natural healing,NH);对照组2为传统拔牙后拔牙窝骨粉充填+GBR组(Bio-Oss+GBR,BOG)。牙齿拔除3个月后拍摄X线片,对比研究各组之间的牙槽骨吸收程度的差异。结果拔牙后3个月,实验组牙槽骨吸收程度明显小于对照组1和2,对照组1和2之间差异无统计意义。结论用牙周膜牵张成骨拔牙法进行位点保存,能更大程度保存牙槽骨。

Objective To evaluate the effect of site preservation on the preservation amount of alveolar bones to keep their height and width to a greater extent,using dentoalveolar distraction extraction(DDE).Methods Twelve beagle dogs were randomly divided into three groups.In experimental group,the third premolars on one side of mandible were extracted with dentoalveolar distraction.In control group 1,the third premolars were extracted traditionally without any site preservation(natural healing,NH).For the other four dogs,the third premolars on one side of mandible were extracted as control group 2,following the Bio-Oss bone dust implant and guided bone regeneration(Bio-Oss+GBR,BOG).The X-rays were taken three months after tooth extraction,and the results were compared among different groups.Results Three months after tooth extraction,the alveolar bone resorption in the experimental group was significantly lower than that in the control groups 1 and 2.There was no statistical significance between the control groups 1 and 2.Conclusion The alveolar bone can be preserved to a greater extent by using dentoalveolar distraction extraction for site preservation.