Objective:To observe the periodontal healing of autogenously transplanted teeth loaded orthodontically after autotransplantation in Beagle dogs.Methods:Forty-eight teeth were autogenously transplanted,24 of which were...Objective:To observe the periodontal healing of autogenously transplanted teeth loaded orthodontically after autotransplantation in Beagle dogs.Methods:Forty-eight teeth were autogenously transplanted,24 of which were loaded postoperatively with orthodontic force at different time points and for different durations.Periodontal healing was evaluated by probing pocket depth(PPD),the expression of relevant proteins,and histomorphometric analyses.Results:The dental pockets of loaded and non-loaded teeth were both much deeper after the first postoperative week than before transplantation(P<0.05).Later,the PPD,which was measured after postoperative weeks 1,3,5,9 and 13,gradually became shallow.The expressions of alkaline phosphatase(ALP)and basic fibroblast growth factor(bFGF)were higher in loaded teeth than in non-loaded teeth(P<0.05),and in groups subjected to two weeks duration of loading than in other groups at the same load time point(P<0.05).For the same load duration,the expressions of ALP and bFGF in teeth loaded after postoperative week 4 were higher than those of other treatments(P<0.05).According to histomorphometric analyses,an orthodontic force on transplanted teeth applied after postoperative weeks 4 or 8 for two weeks duration should be favorable for periodontal healing.Conclusions:It is advisable to apply an appropriate magnitude of force on autotransplanted teeth,such as orthodontic force,at appropriate time points and for a suitable duration,to achieve the optimal clinical prognosis following autogenous tooth transplantation.These results may serve as a basis for subsequent studies in humans so as to make clinical improvements.展开更多
目的探讨空心环钻与数字化手术导板联合应用于制备自体牙移植受植窝洞的有效性及准确性。方法从2022年5—8月就诊于广州医科大学附属口腔医院颌面外科的患者中招募了16例磨牙缺失并接受自体牙移植修复的患者,实验对象采用随机数字表方...目的探讨空心环钻与数字化手术导板联合应用于制备自体牙移植受植窝洞的有效性及准确性。方法从2022年5—8月就诊于广州医科大学附属口腔医院颌面外科的患者中招募了16例磨牙缺失并接受自体牙移植修复的患者,实验对象采用随机数字表方法分为自由手组和导板组,每组8例。导板组用锥形束CT(CBCT)和口内扫描系统进行扫描,将结果导入Mimics 21.0,分析受体部位区域选择供体牙,模拟供体牙的植入以确定植入位置。设计基于空心环钻的数字化导板导向套,并生成数字化导板。自由手组按照常规自体牙移植手术流程,术中采用3D打印供牙模型试植,自由手预备窝洞。术后对患者重新进行CBCT扫描,使用Geomagic Control X匹配并对术前设计牙齿位置与术后实际牙齿位置进行比较。结果自体牙移植术后1年的随访中,两组的移植牙均成功愈合。导板组备洞时间为(323±50)s,自由手组为(522±91)s,两者相比差异有统计学意义(t=5.394,P<0.001)。导板组3D供牙试植次数(2.9±0.8)次,自由手组3D供牙试植次数(4.1±1.2)次,两者相比差异有统计学意义(t=2.357,P=0.034)。导板组术前术后牙齿的三维位置对比分析,显示牙体长轴的角度偏差为(9.0±5.5)°,3D偏差显示牙齿中心点的偏差为(1.0±0.6)mm,根尖偏差为(2.1±1.1)mm,移植牙相对于术前设计牙齿位置偏差较小。结论通过使用新方法,自体牙移植备洞时间缩短,过程可靠精确,深度可控,备洞流程简化,备洞过程中空心环钻取出骨块可用于自体牙移植牙槽骨缺损的骨移植,自体骨愈合效果好,节约成本。展开更多
Background: To present a new idea for rapid management of tooth avulsion in young children and adolescents (age: 6 to 16) by this case report. Case presentation: A nine-year-old boy presented with loss of upper perman...Background: To present a new idea for rapid management of tooth avulsion in young children and adolescents (age: 6 to 16) by this case report. Case presentation: A nine-year-old boy presented with loss of upper permanent central incisor in early mixed dentition (6 to 10 years, phase I). The not yet fully resorbed primary canine was used as tooth transplant for the lost incisor. The intentional renounce on endodontic treatment of the primary transplant permits natural exfoliation of the transplant occurring either spontaneously or due to undermining resorption through the adjacent erupting teeth. In the late mixed dentition (10 to 16 years, phase II), the primary tooth transplant is electively removed and replaced by a premolar autotransplant for long-term rehabilitation of the meanwhile adolescent patient. Results: Primary canine autoTX acts as a temporary denture with instant surgical gap closure. Ensuing premolar autoTX in phase II then acts as permanent denture with excellent 10 years survival rates. Patient satisfaction issued by a questionnaire resulted in good to very good school grades for both phases of autotransplantation. Conclusions: The “TPTX” concept is a new surgical approach that immediately restores the patient’s function and aesthetics after tooth loss in early childhood supporting the growth of local bone and soft tissue in the growing adolescent jaw.展开更多
Objective： To evaluate the effectiveness of regenerous tissue and bone substitute in autogenous tooth transplantation in the larger recipient socket. Methods：In 3 Beagle dogs, 18 incisors were transplanted to the re...Objective： To evaluate the effectiveness of regenerous tissue and bone substitute in autogenous tooth transplantation in the larger recipient socket. Methods：In 3 Beagle dogs, 18 incisors were transplanted to the recipient sockets, 2 mm wider mesio-distally. The regenerous tissue group, the bone substitute group and the control group contained 7, 7 and 4 teeth respectively. No additional material was used in control group. Clinical and radiographic examinations were done every month and were sacrificed 3 months later. Subsequently, decalcified sections were prepared for routine histological evaluation. Ordinal scores for root surface resorption were analyzed using the Kruskal-Wallis test. Results：All donor teeth survived. A statistically significant difference was found among all three treatment groups（P= 0.0001）. The proliferating tissue in space positively affected the periodontal healing without any resorption. Inflammatory resorption of the root surface and formation of new bone were observed in the bone substitute group. Surface resorptions of the roots were found in the control group. Conclusion：Proliferating tissues enhance the regeneration of periodontal tissues in larger recipient sockets and prevent root resorption. Sinbone HT is beneficial for the stabilization of the transplanted teeth in larger sockets.展开更多
基金Project supported by the Development of Science and Technology Project of Shandong Province(No.2008GG30002007)the International Technical Cooperation Plan of Shandong Province(No.2012GGE27143),China
文摘Objective:To observe the periodontal healing of autogenously transplanted teeth loaded orthodontically after autotransplantation in Beagle dogs.Methods:Forty-eight teeth were autogenously transplanted,24 of which were loaded postoperatively with orthodontic force at different time points and for different durations.Periodontal healing was evaluated by probing pocket depth(PPD),the expression of relevant proteins,and histomorphometric analyses.Results:The dental pockets of loaded and non-loaded teeth were both much deeper after the first postoperative week than before transplantation(P<0.05).Later,the PPD,which was measured after postoperative weeks 1,3,5,9 and 13,gradually became shallow.The expressions of alkaline phosphatase(ALP)and basic fibroblast growth factor(bFGF)were higher in loaded teeth than in non-loaded teeth(P<0.05),and in groups subjected to two weeks duration of loading than in other groups at the same load time point(P<0.05).For the same load duration,the expressions of ALP and bFGF in teeth loaded after postoperative week 4 were higher than those of other treatments(P<0.05).According to histomorphometric analyses,an orthodontic force on transplanted teeth applied after postoperative weeks 4 or 8 for two weeks duration should be favorable for periodontal healing.Conclusions:It is advisable to apply an appropriate magnitude of force on autotransplanted teeth,such as orthodontic force,at appropriate time points and for a suitable duration,to achieve the optimal clinical prognosis following autogenous tooth transplantation.These results may serve as a basis for subsequent studies in humans so as to make clinical improvements.
文摘目的探讨空心环钻与数字化手术导板联合应用于制备自体牙移植受植窝洞的有效性及准确性。方法从2022年5—8月就诊于广州医科大学附属口腔医院颌面外科的患者中招募了16例磨牙缺失并接受自体牙移植修复的患者,实验对象采用随机数字表方法分为自由手组和导板组,每组8例。导板组用锥形束CT(CBCT)和口内扫描系统进行扫描,将结果导入Mimics 21.0,分析受体部位区域选择供体牙,模拟供体牙的植入以确定植入位置。设计基于空心环钻的数字化导板导向套,并生成数字化导板。自由手组按照常规自体牙移植手术流程,术中采用3D打印供牙模型试植,自由手预备窝洞。术后对患者重新进行CBCT扫描,使用Geomagic Control X匹配并对术前设计牙齿位置与术后实际牙齿位置进行比较。结果自体牙移植术后1年的随访中,两组的移植牙均成功愈合。导板组备洞时间为(323±50)s,自由手组为(522±91)s,两者相比差异有统计学意义(t=5.394,P<0.001)。导板组3D供牙试植次数(2.9±0.8)次,自由手组3D供牙试植次数(4.1±1.2)次,两者相比差异有统计学意义(t=2.357,P=0.034)。导板组术前术后牙齿的三维位置对比分析,显示牙体长轴的角度偏差为(9.0±5.5)°,3D偏差显示牙齿中心点的偏差为(1.0±0.6)mm,根尖偏差为(2.1±1.1)mm,移植牙相对于术前设计牙齿位置偏差较小。结论通过使用新方法,自体牙移植备洞时间缩短,过程可靠精确,深度可控,备洞流程简化,备洞过程中空心环钻取出骨块可用于自体牙移植牙槽骨缺损的骨移植,自体骨愈合效果好,节约成本。
文摘Background: To present a new idea for rapid management of tooth avulsion in young children and adolescents (age: 6 to 16) by this case report. Case presentation: A nine-year-old boy presented with loss of upper permanent central incisor in early mixed dentition (6 to 10 years, phase I). The not yet fully resorbed primary canine was used as tooth transplant for the lost incisor. The intentional renounce on endodontic treatment of the primary transplant permits natural exfoliation of the transplant occurring either spontaneously or due to undermining resorption through the adjacent erupting teeth. In the late mixed dentition (10 to 16 years, phase II), the primary tooth transplant is electively removed and replaced by a premolar autotransplant for long-term rehabilitation of the meanwhile adolescent patient. Results: Primary canine autoTX acts as a temporary denture with instant surgical gap closure. Ensuing premolar autoTX in phase II then acts as permanent denture with excellent 10 years survival rates. Patient satisfaction issued by a questionnaire resulted in good to very good school grades for both phases of autotransplantation. Conclusions: The “TPTX” concept is a new surgical approach that immediately restores the patient’s function and aesthetics after tooth loss in early childhood supporting the growth of local bone and soft tissue in the growing adolescent jaw.
基金Jiangsu Provincial Education Department Fund(No.06 KJD320124)
文摘Objective： To evaluate the effectiveness of regenerous tissue and bone substitute in autogenous tooth transplantation in the larger recipient socket. Methods：In 3 Beagle dogs, 18 incisors were transplanted to the recipient sockets, 2 mm wider mesio-distally. The regenerous tissue group, the bone substitute group and the control group contained 7, 7 and 4 teeth respectively. No additional material was used in control group. Clinical and radiographic examinations were done every month and were sacrificed 3 months later. Subsequently, decalcified sections were prepared for routine histological evaluation. Ordinal scores for root surface resorption were analyzed using the Kruskal-Wallis test. Results：All donor teeth survived. A statistically significant difference was found among all three treatment groups（P= 0.0001）. The proliferating tissue in space positively affected the periodontal healing without any resorption. Inflammatory resorption of the root surface and formation of new bone were observed in the bone substitute group. Surface resorptions of the roots were found in the control group. Conclusion：Proliferating tissues enhance the regeneration of periodontal tissues in larger recipient sockets and prevent root resorption. Sinbone HT is beneficial for the stabilization of the transplanted teeth in larger sockets.
