Int J Oral Maxillofac Implants. 2024 Oct 16;39(5):713-722. doi: 10.11607/jomi.10754.
To evaluate the dimensional changes in the alveolar crest after buccal overbuilding was performed prior to tooth extraction in a dog model.
At the test sites, alveolar crest overbuilding was performed on the buccal aspect of the distal root of the third premolar using xenograft covered with a collagen membrane. No treatment was applied at the control sites. After 3 months, the distal roots of both third premolars were extracted and implants were immediately placed into the alveolus, allowing nonsubmerged healing. After 3 months, biopsy samples were collected.
Upon histologic analysis, no statistically significant differences in hard tissue dimensions were found. The buccal bone plate at the test sites presented a tendency for higher resorption compared to the control sites. However, if the contribution of the residue of biomaterial is considered, a higher volumetric gain was registered at the test than at the control sites.
The buccal overbuilding performed prior to tooth extraction did not contribute to the preservation of the alveolar crest dimensions after extraction. This could be due to failure to incorporate the graft into the newly formed bone.
评估犬模型中拔牙前颊侧骨增量术后牙槽嵴的尺寸变化。
在试验部位，使用覆盖有胶原膜的异种移植物对第三磨牙远中根的颊侧进行牙槽嵴增量。对照部位不进行任何处理。3 个月后，同时拔除双侧第三磨牙的近中根，并将种植体立即植入牙槽窝中，实现非埋入式愈合。3 个月后，采集活检样本。
组织学分析显示，硬组织尺寸无统计学差异。与对照部位相比，试验部位颊侧骨板有较高的吸收趋势。然而，如果考虑生物材料残留的贡献，试验部位的体积增加高于对照部位。
拔牙前的颊侧骨增量术并不能有助于拔牙后牙槽嵴尺寸的保留。这可能是由于移植物未能与新形成的骨结合。
