The multi-piece post-crown technique is more effective in restoring residual root than other restoration techniques.Various types of adhesives have different material properties that affect restoration.Therefore,the c...The multi-piece post-crown technique is more effective in restoring residual root than other restoration techniques.Various types of adhesives have different material properties that affect restoration.Therefore,the choice of adhesive is particularly important for patients.However,the effect of different kinds of adhesives was not too precise by experimental methods when concerning about individual differences of teeth.One tooth root can only be restored with one type of adhesive in experiment.After the mechanical test,this tooth root cannot be restored with other adhesives.With the help of medical imaging technology,reverse engineering and finite element analysis,a molar model can be reconstructed precisely and restored using different types of adhesives.The same occlusal and chewing loads were exerted on the same restored residual root models with different types of adhesives separately.Results of von Mises stress analysis showed that the adhesives with low Young’s modulus can protect the root canal effectively.However,a root canal concentration is apparently produced around the root canal orifice when chewing.Adhesives with large Young’s modulus can buffer the stress concentration of the root canal orifice.However,the root canal tissue may be destroyed because the adhesive is too hard to buffer the load.展开更多
背景:纤维桩是具有卓越的机械性能、生物相容性和美学效果的非金属牙科修复材料,对于大范围牙齿结构缺损的根管治疗牙具有良好的修复效果。目的:综述纤维桩的分类特性及其在临床修复中的应用进展。方法:应用计算机在中国知网和PubMed数...背景:纤维桩是具有卓越的机械性能、生物相容性和美学效果的非金属牙科修复材料,对于大范围牙齿结构缺损的根管治疗牙具有良好的修复效果。目的:综述纤维桩的分类特性及其在临床修复中的应用进展。方法:应用计算机在中国知网和PubMed数据库中检索有关纤维桩的文献,中文检索词为“纤维桩,分类,牙本质肩领,修复失效,纤维桩拆除,CAD/CAM”,英文检索词为“dental fiber post,classification,ferrule,failure of repair,dental fiber post removal,CAD/CAM”,最终纳入82篇文献进行分析。结果与结论:根据纤维成分的不同,纤维桩可分为碳纤维桩、玻璃纤维桩和石英纤维桩等类型,其中玻璃纤维桩在临床实践中应用最为广泛。纤维桩的固位力和抗力与剩余牙本质肩领紧密相关,而剩余牙本质肩领的数量、高度和厚度通常决定了纤维桩修复适应证的选择。纤维桩的粘接过程具有一定的技术要求,因此,遵循规范化的操作流程显得尤为重要。尽管纤维桩具备良好的机械性能,但在临床使用过程中仍可能出现与根管不密合、松动、脱落、折断或修复失败后的拆除等问题。通过定制个性化纤维桩、选择适当的表面处理方法以及探索新材料和新技术,有望提升纤维桩的临床应用效果。展开更多
文摘The multi-piece post-crown technique is more effective in restoring residual root than other restoration techniques.Various types of adhesives have different material properties that affect restoration.Therefore,the choice of adhesive is particularly important for patients.However,the effect of different kinds of adhesives was not too precise by experimental methods when concerning about individual differences of teeth.One tooth root can only be restored with one type of adhesive in experiment.After the mechanical test,this tooth root cannot be restored with other adhesives.With the help of medical imaging technology,reverse engineering and finite element analysis,a molar model can be reconstructed precisely and restored using different types of adhesives.The same occlusal and chewing loads were exerted on the same restored residual root models with different types of adhesives separately.Results of von Mises stress analysis showed that the adhesives with low Young’s modulus can protect the root canal effectively.However,a root canal concentration is apparently produced around the root canal orifice when chewing.Adhesives with large Young’s modulus can buffer the stress concentration of the root canal orifice.However,the root canal tissue may be destroyed because the adhesive is too hard to buffer the load.
文摘背景:纤维桩是具有卓越的机械性能、生物相容性和美学效果的非金属牙科修复材料,对于大范围牙齿结构缺损的根管治疗牙具有良好的修复效果。目的:综述纤维桩的分类特性及其在临床修复中的应用进展。方法:应用计算机在中国知网和PubMed数据库中检索有关纤维桩的文献,中文检索词为“纤维桩,分类,牙本质肩领,修复失效,纤维桩拆除,CAD/CAM”,英文检索词为“dental fiber post,classification,ferrule,failure of repair,dental fiber post removal,CAD/CAM”,最终纳入82篇文献进行分析。结果与结论:根据纤维成分的不同,纤维桩可分为碳纤维桩、玻璃纤维桩和石英纤维桩等类型,其中玻璃纤维桩在临床实践中应用最为广泛。纤维桩的固位力和抗力与剩余牙本质肩领紧密相关,而剩余牙本质肩领的数量、高度和厚度通常决定了纤维桩修复适应证的选择。纤维桩的粘接过程具有一定的技术要求,因此,遵循规范化的操作流程显得尤为重要。尽管纤维桩具备良好的机械性能,但在临床使用过程中仍可能出现与根管不密合、松动、脱落、折断或修复失败后的拆除等问题。通过定制个性化纤维桩、选择适当的表面处理方法以及探索新材料和新技术,有望提升纤维桩的临床应用效果。
