Abstract：
OBJECTIVE: To radiographically evaluate the effect of intact periosteum in guided bone regeneration (GBR) for the treatment of peri-implant ridge defects in posterior region.
METHODS: Twenty-eight patients who satisfied the criteria were included in this study. Buccal dehiscence defects were regenerated using demineralised bovine bone mineral (DBBM). Subjects were divided into two groups: the control group (conventional GBR, buccal trapezoidal flap and DBBM with collagen membrane coverage, n = 14) and the test group (modified GBR, buccal pouch and DBBM with collagen membrane coverage, n = 14). CBCT images obtained immediately after and 3 to 7 months following GBR were used to assess buccal bone thickness (BBT) at a level of 0, 2, 4 and 6 mm below the implant platform.
RESULTS: Immediately after surgery, BBT at 0 mm and 2 mm below the implant platform presented a significant difference between the two groups (P < 0.05) with significantly thicker buccal bone in the control group in terms of BBT-0 (3.83 ± 1.01 mm) and BBT-2 (4.88 ± 1.15 mm) than in the test group (2.33 ± 0.66 mm and 3.60 ± 1.10 mm, P = 0.000 and P = 0.008, respectively). After 3 to 7 months of healing, the BBT at all levels showed no significant difference between the two groups (P > 0.05), but more bone graft resorption (BBR) in the control group in terms of BBR-0 (2.45 ± 1.14 mm), BBR-2 (2.09 ± 0.94 mm) and BBR-0% (65.37% ± 26.62%) than the test group (BBR-0 1.07 ± 0.51 mm, P = 0.001; BBR-2, 1.22 ± 0.63 mm, P = 0.008; BBR-0% 45.70% ± 15.52%, P = 0.024).
CONCLUSIONS: In the short term, all treatment modalities achieved similar coronal BBT and the intact periosteum had a positive effect on keeping ridge dimensions even.
METHODS: Twenty-eight patients who satisfied the criteria were included in this study. Buccal dehiscence defects were regenerated using demineralised bovine bone mineral (DBBM). Subjects were divided into two groups: the control group (conventional GBR, buccal trapezoidal flap and DBBM with collagen membrane coverage, n = 14) and the test group (modified GBR, buccal pouch and DBBM with collagen membrane coverage, n = 14). CBCT images obtained immediately after and 3 to 7 months following GBR were used to assess buccal bone thickness (BBT) at a level of 0, 2, 4 and 6 mm below the implant platform.
RESULTS: Immediately after surgery, BBT at 0 mm and 2 mm below the implant platform presented a significant difference between the two groups (P < 0.05) with significantly thicker buccal bone in the control group in terms of BBT-0 (3.83 ± 1.01 mm) and BBT-2 (4.88 ± 1.15 mm) than in the test group (2.33 ± 0.66 mm and 3.60 ± 1.10 mm, P = 0.000 and P = 0.008, respectively). After 3 to 7 months of healing, the BBT at all levels showed no significant difference between the two groups (P > 0.05), but more bone graft resorption (BBR) in the control group in terms of BBR-0 (2.45 ± 1.14 mm), BBR-2 (2.09 ± 0.94 mm) and BBR-0% (65.37% ± 26.62%) than the test group (BBR-0 1.07 ± 0.51 mm, P = 0.001; BBR-2, 1.22 ± 0.63 mm, P = 0.008; BBR-0% 45.70% ± 15.52%, P = 0.024).
CONCLUSIONS: In the short term, all treatment modalities achieved similar coronal BBT and the intact periosteum had a positive effect on keeping ridge dimensions even.
摘要：
目的：通过影像学评估完整骨膜在引导骨再生（GBR）治疗后区种植体周围隆起缺损中的作用。
方法：28例符合标准的患者纳入本研究。使用去矿质牛骨矿物质（DBBM）再生颊开裂缺损。受试者分为两组:对照组(常规GBR,颊梯形皮瓣和具有胶原膜覆盖的DBBM，n=14)和试验组(改良GBR，口腔袋和具有胶原蛋白膜覆盖的DBBM，n=14)。在GBR后立即和3至7个月后获得的CBCT图像用于评估植入物平台下方0、2、4和6mm水平的颊骨厚度（BBT）。
结果：手术后立即，种植体平台以下0mm和2mm处的BBT在两组之间存在显着差异（P<0.05），对照组中BBT-0（3.83±1.01mm）和BBT-2（4.88±1.15mm）的颊骨厚度明显超过测试组（2.33±0.66mm和3.60±1.10mm，分别为P=0.000和P=0.008)。经过3到7个月的愈合，两组各水平BBT比较差异无统计学意义(P>0.05),但对照组中BBR-0（2.45±1.14mm）的骨吸收（BBR）更多，BBR-2(2.09±0.94mm)和BBR-0%(65.37%±26.62%)比试验组(BBR-01.07±0.51mm,P=0.001;BBR-2,1.22±0.63mm,P=0.008；BBR-0%45.70%±15.52%，P=0.024)。
结论：在短期内，所有治疗方式均达到相似的冠状BBT，完整的骨膜对保持脊径均匀有积极作用。
方法：28例符合标准的患者纳入本研究。使用去矿质牛骨矿物质（DBBM）再生颊开裂缺损。受试者分为两组:对照组(常规GBR,颊梯形皮瓣和具有胶原膜覆盖的DBBM，n=14)和试验组(改良GBR，口腔袋和具有胶原蛋白膜覆盖的DBBM，n=14)。在GBR后立即和3至7个月后获得的CBCT图像用于评估植入物平台下方0、2、4和6mm水平的颊骨厚度（BBT）。
结果：手术后立即，种植体平台以下0mm和2mm处的BBT在两组之间存在显着差异（P<0.05），对照组中BBT-0（3.83±1.01mm）和BBT-2（4.88±1.15mm）的颊骨厚度明显超过测试组（2.33±0.66mm和3.60±1.10mm，分别为P=0.000和P=0.008)。经过3到7个月的愈合，两组各水平BBT比较差异无统计学意义(P>0.05),但对照组中BBR-0（2.45±1.14mm）的骨吸收（BBR）更多，BBR-2(2.09±0.94mm)和BBR-0%(65.37%±26.62%)比试验组(BBR-01.07±0.51mm,P=0.001;BBR-2,1.22±0.63mm,P=0.008；BBR-0%45.70%±15.52%，P=0.024)。
结论：在短期内，所有治疗方式均达到相似的冠状BBT，完整的骨膜对保持脊径均匀有积极作用。
