In order to investigate the influence of abutment material on the stress of implant-supported all-ceramic single crown, a 3D finite element model of implant-supported mandibular first premolar was computed by COSMOS/M...In order to investigate the influence of abutment material on the stress of implant-supported all-ceramic single crown, a 3D finite element model of implant-supported mandibular first premolar was computed by COSMOS/M 2.85 software. Alumina, zirconia, and titanium were used as abutment materials respectively. Vertical 600 N and horizontal 225 N load was applied on the occlusal surface. The results show that the stress distribution of implant-supported single crown was similar for different abutment materials. Maximum stresses within the crown were higher when titanium abutment was used. Maximum stress of titanium abutment was lower than that of ceramic abutment. Within the screw and fixture, maximum stresses had no difference under vertical loading but higher as titanium abutment was used under horizontal loading. There was no difference of maximum stress within the bone when different abutment materials were used. The present findings indicate that the abutment material had no influence on the stress distribution of implant-supported all- ceramic single crown but maximum stress when the titanium abutment was lower than that of ceramic abutment.展开更多
[Objectives]To explore the difference between the CAD/CAM customized zirconia abutment and the finished titanium abutment in the maxillary anterior region.[Methods]A total of 60 implants were selected from 60 patients...[Objectives]To explore the difference between the CAD/CAM customized zirconia abutment and the finished titanium abutment in the maxillary anterior region.[Methods]A total of 60 implants were selected from 60 patients who had undergone maxillary single anterior implant implantation in the Department of Oral and Maxillofacial Surgery,Affiliated Hospital of Qingdao University from July 2017 to July 2018.They were randomly divided into an observation group and a control group(30 patients/group).The observation group used CAD/CAM customized zirconia abutment and all-ceramic crown,while the control group used finished titanium abutment and all-ceramic crown.Twelve months after the crown restoration,mechanical complications,pink esthetic(another spelling of aesthetic)score(PES)and white esthetic score(WES),and patient satisfaction were used as clinical observation indicators to evaluate the restoration effect.[Results]For 12 months after crown restoration,the implant survival rate of the two groups of patients was 100%,and there was no abutment breakage,loosening,falling off,or screw loosening and breakage.The PES and WES of the observation group were significantly higher than those of the control group(P<0.05).The patient satisfaction of the observation group was significantly higher than those of the control group(P<0.05).[Conclusions]CAD/CAM customized zirconia abutment implant restoration in the maxillary anterior region can obtain good esthetic restoration effect in a short term,and has good clinical application effect.展开更多
目的:探讨CAD/CAM个性化基台在缺牙种植修复中的美学效果。方法:选取2016年7月-2019年7月唐山市口腔医院收治的51例缺牙患者为研究对象,通过随机数字表法分为观察组(n=26)和对照组(n=25)。对照组采用成品基台进行种植修复,观察组采用CAD...目的:探讨CAD/CAM个性化基台在缺牙种植修复中的美学效果。方法:选取2016年7月-2019年7月唐山市口腔医院收治的51例缺牙患者为研究对象,通过随机数字表法分为观察组(n=26)和对照组(n=25)。对照组采用成品基台进行种植修复,观察组采用CAD/CAM个性化基台进行种植修复,两组均治疗3个月。比较两组治疗3个月后的龈乳头形态,对比两组治疗前、治疗3个月后的美学评分及牙周指标,统计两组治疗期间的食物嵌塞情况。结果:治疗3个月后,观察组牙龈乳头指数明显高于对照组(92.31% vs 68.00%),差异有统计学意义(P<0.05)。治疗3个月后,两组红色美学指数(PES)及白色美学指数(WES)评分较治疗前升高,观察组高于对照组,差异有统计学意义(P<0.05);而牙龈指数(GI)、牙齿菌斑指数(PLI)及龈沟出血指数(SBI)评分较治疗前降低,且观察组低于对照组,差异有统计学意义(P<0.05)。治疗期间,观察组食物嵌塞发生率低于对照组(11.54% vs 44.00%),差异有统计学意义(P<0.05)。结论:CAD/CAM个性化基台可改善缺牙患者龈乳头形态及牙周指标,提高美学效果,同时可减少患者食物嵌塞的发生。展开更多
基金the National Natural Science Foundation of China (No.30801312)
文摘In order to investigate the influence of abutment material on the stress of implant-supported all-ceramic single crown, a 3D finite element model of implant-supported mandibular first premolar was computed by COSMOS/M 2.85 software. Alumina, zirconia, and titanium were used as abutment materials respectively. Vertical 600 N and horizontal 225 N load was applied on the occlusal surface. The results show that the stress distribution of implant-supported single crown was similar for different abutment materials. Maximum stresses within the crown were higher when titanium abutment was used. Maximum stress of titanium abutment was lower than that of ceramic abutment. Within the screw and fixture, maximum stresses had no difference under vertical loading but higher as titanium abutment was used under horizontal loading. There was no difference of maximum stress within the bone when different abutment materials were used. The present findings indicate that the abutment material had no influence on the stress distribution of implant-supported all- ceramic single crown but maximum stress when the titanium abutment was lower than that of ceramic abutment.
文摘[Objectives]To explore the difference between the CAD/CAM customized zirconia abutment and the finished titanium abutment in the maxillary anterior region.[Methods]A total of 60 implants were selected from 60 patients who had undergone maxillary single anterior implant implantation in the Department of Oral and Maxillofacial Surgery,Affiliated Hospital of Qingdao University from July 2017 to July 2018.They were randomly divided into an observation group and a control group(30 patients/group).The observation group used CAD/CAM customized zirconia abutment and all-ceramic crown,while the control group used finished titanium abutment and all-ceramic crown.Twelve months after the crown restoration,mechanical complications,pink esthetic(another spelling of aesthetic)score(PES)and white esthetic score(WES),and patient satisfaction were used as clinical observation indicators to evaluate the restoration effect.[Results]For 12 months after crown restoration,the implant survival rate of the two groups of patients was 100%,and there was no abutment breakage,loosening,falling off,or screw loosening and breakage.The PES and WES of the observation group were significantly higher than those of the control group(P<0.05).The patient satisfaction of the observation group was significantly higher than those of the control group(P<0.05).[Conclusions]CAD/CAM customized zirconia abutment implant restoration in the maxillary anterior region can obtain good esthetic restoration effect in a short term,and has good clinical application effect.
文摘目的:探讨CAD/CAM个性化基台在缺牙种植修复中的美学效果。方法:选取2016年7月-2019年7月唐山市口腔医院收治的51例缺牙患者为研究对象,通过随机数字表法分为观察组(n=26)和对照组(n=25)。对照组采用成品基台进行种植修复,观察组采用CAD/CAM个性化基台进行种植修复,两组均治疗3个月。比较两组治疗3个月后的龈乳头形态,对比两组治疗前、治疗3个月后的美学评分及牙周指标,统计两组治疗期间的食物嵌塞情况。结果:治疗3个月后,观察组牙龈乳头指数明显高于对照组(92.31% vs 68.00%),差异有统计学意义(P<0.05)。治疗3个月后,两组红色美学指数(PES)及白色美学指数(WES)评分较治疗前升高,观察组高于对照组,差异有统计学意义(P<0.05);而牙龈指数(GI)、牙齿菌斑指数(PLI)及龈沟出血指数(SBI)评分较治疗前降低,且观察组低于对照组,差异有统计学意义(P<0.05)。治疗期间,观察组食物嵌塞发生率低于对照组(11.54% vs 44.00%),差异有统计学意义(P<0.05)。结论:CAD/CAM个性化基台可改善缺牙患者龈乳头形态及牙周指标,提高美学效果,同时可减少患者食物嵌塞的发生。
