The aim of this study was to compare the bone resorption differences between implant placement sites (IPS) and non-implant placement sites (NIPS) after autogenous block bone grafts in the anterior maxilla. Fourteen pa...The aim of this study was to compare the bone resorption differences between implant placement sites (IPS) and non-implant placement sites (NIPS) after autogenous block bone grafts in the anterior maxilla. Fourteen patients (58 edentulous sites) with alveolar atrophy in the anterior maxilla were treated with autogenous block bone grafts. CBCT examinations were performed at 1 month before surgery (T0), immediately after surgery (T1), 3 to 4 months after surgery (T2), 6 to 7 months after surgery before implant placement (T3), 12 to 13 months after surgery (T4), and the longest follow-up point (T5). Alveolar crestal and basal bone width (ACBW, ABBW), and alveolar bone height (ABH) were measured and divided into IPS (30 sites) and NIPS (28 sites). All results were compared by the Wilcoxon Signed Rank test. The bone resorption changes for both groups were the same. For these three parameters, ACBW didn’t change significantly from T2 to T3 and T4 to T5, ABBW didn’t change at every period from T2 to T5, and ABH didn’t change from T4 to T5. The bone resorption volume of ACBW and ABH in NIPS were more than in IPS after implant placement surgery, while the volume of ABBW was similar in both groups. At T5, the bone resorption percentages of ACBW, ABBW, and ABH were 25.57%, 16.85% and 43.84% in IPS, and 33.55%, 15.92% and 46.44% in NIPS. A more rapid loss of alveolar crest in NIPS resulted from implant placement surgery, and this reminded us of the importance of immediate implant placement.展开更多
BACKGROUND Severe horizontal bone deficiency of the maxillary anterior region is considered a major challenge in reconstruction and successful implant placement.Various approaches have been developed to augment bone v...BACKGROUND Severe horizontal bone deficiency of the maxillary anterior region is considered a major challenge in reconstruction and successful implant placement.Various approaches have been developed to augment bone volume.Of these approaches,onlay bone graft,alveolar bone splitting,and guided bone regeneration have been suggested.CASE SUMMARY A 22-year-old female patient,with no previous medical history,presented to the Department of Oral Implantology,Wuhan University due to a missing right maxillary incisor.The X-ray results showed severe horizontal bone deficiency,with an available bone width of 3.1-4.0 mm.The two bone blocks sandwich technique was performed to augment the bone volume.After 6 months healing,X-ray results showed that the newly formed alveolar ridge dimension increased to 4.7-9.5 mm horizontally.Implant insertion surgery was performed and allceramic restorations were fabricated.The implant was stable at the 1-year followup visit after restoration,and the X-ray showed a stable bone level around the dental implant.The scores for the pink esthetic score and white esthetic score were 12 and 8,respectively,and the patient was satisfied with the esthetic outcome.CONCLUSION The two bone blocks sandwich technique may be an alternative treatment option in augmenting severe horizontal bone deficiency of the anterior maxilla.展开更多
目的:分析上颌前牙区,延期种植同期进行引导骨再生(guided bone regeneration,GBR)术后6个月唇侧骨吸收的影响因素。探究种植二期手术时种植体唇侧骨宽度对种植体边缘骨吸收的影响。方法:本研究为回顾性队列研究,随访至最终修复后1年。...目的:分析上颌前牙区,延期种植同期进行引导骨再生(guided bone regeneration,GBR)术后6个月唇侧骨吸收的影响因素。探究种植二期手术时种植体唇侧骨宽度对种植体边缘骨吸收的影响。方法:本研究为回顾性队列研究,随访至最终修复后1年。采用锥形束CT(cone beam CT,CBCT)测量术后即刻(T1)和术后6个月(T2)种植体唇侧水平骨宽度和垂直骨高度,采用广义线性混合模型分析影响因素。根据T2时的唇侧骨宽度,将种植体分为3个队列:0骨壁组、骨壁<2 mm组和骨壁≥2 mm组,探究组间边缘骨吸收差异。结果:共纳入57例患者,94枚种植体。容纳性骨缺损、种植体连接愈合基台与更少的骨吸收显著相关;在修复后1年的随访中,组间边缘骨吸收差异无统计学意义;种植位点行软组织增量手术与更少的边缘骨丧失显著相关。结论:GBR术中使用愈合基台更有利于维持水平、垂直骨量;软组织增量手术利于维持稳定的边缘骨水平。展开更多
目的:探究伴牙周炎患者种植牙同期行引导骨组织再生术(Guided bone regeneration,GBR)治疗的美学修复效果及对牙槽骨吸收的影响。方法:病例选取笔者医院2019年6月-2021年6月收治的牙周炎牙种植患者78例作为研究对象,按照随机数字表法分...目的:探究伴牙周炎患者种植牙同期行引导骨组织再生术(Guided bone regeneration,GBR)治疗的美学修复效果及对牙槽骨吸收的影响。方法:病例选取笔者医院2019年6月-2021年6月收治的牙周炎牙种植患者78例作为研究对象,按照随机数字表法分为对照组和观察组,对照组给予患者常规种植修复,观察组在对照组基础上采用GBR治疗,比较两组患者术后6个月、12个月的牙周探查深度(Periodontal exploration depth,PD)、改良龈沟出血指数(Sulcular bleeding index,mSBI)、改良菌斑指数(Plaque index,mPLI)、骨吸收量以及美学修复效果。结果:术后6个月、12个月,观察组患者的mSBI均低于对照组患者(P<0.05)。种植体周围骨吸收量比较,术后12个月两组患者的近中骨吸收量和远中骨吸收量均较术后6个月显著降低(P<0.05),且术后12个月观察组患者的近中骨吸收量和远中骨吸收量均显著低于对照组。美学效果比较,观察组患者术后6个月、12个月红色美学指数评分均显著高于对照组(P<0.05),且术后12个月两组红色美学指数评分均显著高于术后6个月(P<0.05),术后6个月、12个月,两组白色美学指数评分差异无统计学意义(P>0.05),且两组术后12个月与术后6个月白色美学指数评分比较,差异无统计学意义(P>0.05)。结论:牙周炎患者牙种植同期应用GBR能有效改善患者牙周健康指标,防止种植体周围骨吸收,进而提高种植体留存率,满足患者治疗中种植美学的要求。展开更多
文摘The aim of this study was to compare the bone resorption differences between implant placement sites (IPS) and non-implant placement sites (NIPS) after autogenous block bone grafts in the anterior maxilla. Fourteen patients (58 edentulous sites) with alveolar atrophy in the anterior maxilla were treated with autogenous block bone grafts. CBCT examinations were performed at 1 month before surgery (T0), immediately after surgery (T1), 3 to 4 months after surgery (T2), 6 to 7 months after surgery before implant placement (T3), 12 to 13 months after surgery (T4), and the longest follow-up point (T5). Alveolar crestal and basal bone width (ACBW, ABBW), and alveolar bone height (ABH) were measured and divided into IPS (30 sites) and NIPS (28 sites). All results were compared by the Wilcoxon Signed Rank test. The bone resorption changes for both groups were the same. For these three parameters, ACBW didn’t change significantly from T2 to T3 and T4 to T5, ABBW didn’t change at every period from T2 to T5, and ABH didn’t change from T4 to T5. The bone resorption volume of ACBW and ABH in NIPS were more than in IPS after implant placement surgery, while the volume of ABBW was similar in both groups. At T5, the bone resorption percentages of ACBW, ABBW, and ABH were 25.57%, 16.85% and 43.84% in IPS, and 33.55%, 15.92% and 46.44% in NIPS. A more rapid loss of alveolar crest in NIPS resulted from implant placement surgery, and this reminded us of the importance of immediate implant placement.
文摘BACKGROUND Severe horizontal bone deficiency of the maxillary anterior region is considered a major challenge in reconstruction and successful implant placement.Various approaches have been developed to augment bone volume.Of these approaches,onlay bone graft,alveolar bone splitting,and guided bone regeneration have been suggested.CASE SUMMARY A 22-year-old female patient,with no previous medical history,presented to the Department of Oral Implantology,Wuhan University due to a missing right maxillary incisor.The X-ray results showed severe horizontal bone deficiency,with an available bone width of 3.1-4.0 mm.The two bone blocks sandwich technique was performed to augment the bone volume.After 6 months healing,X-ray results showed that the newly formed alveolar ridge dimension increased to 4.7-9.5 mm horizontally.Implant insertion surgery was performed and allceramic restorations were fabricated.The implant was stable at the 1-year followup visit after restoration,and the X-ray showed a stable bone level around the dental implant.The scores for the pink esthetic score and white esthetic score were 12 and 8,respectively,and the patient was satisfied with the esthetic outcome.CONCLUSION The two bone blocks sandwich technique may be an alternative treatment option in augmenting severe horizontal bone deficiency of the anterior maxilla.
