牙胶尖与扩根器械匹配性的研究  

A study on the compatibility of gutta-percha point with dental root-canal enlarging instrument

作　　者：汪义永[1] 林希鸿[1] 吴浩凌[1] 方儒雄[1] 

机构地区：[1]福建医科大学附属第一医院口腔科,福州350005

出　　处：《口腔材料器械杂志》2003年第4期178-179,185,共3页Chinese Journal of Dental Materials and Devices

摘　　要：目的 研究牙胶尖与扩根器械的匹配情况,为根管充填提供客观依据。方法 取10颗离体前牙自颈部切断,测出每颗离体前牙的断面至根尖的长度,其根部经常规根管预备后,然后插入牙胶尖,再测其进入根管的长度,比较二者的匹配性。结果 扩孔锉与其同一号的牙胶尖的匹配率为16.25％,而与其小一号的牙胶尖的匹配率为86.25％,超填率为5％。结论 与扩孔锉同一号的牙胶尖的匹配率小于小一号的牙胶尖,相同号的牙胶尖之间也存在差异。Objective To investigate the compatibility of the gutta-percha point with dental root-canal enlarging ,offer an objective base for root-canal filling. Methods Ten extrated anterior teeth were cut from their necks. The distance between every section and each point was measured. After the root-canal was regularly prefabricated and the gutta-percha points of different sizes were respectively inserted, the inserting length was measrued.The compatibility between them was compared.Results The Compatibility between root canal file and the gutta-percha point of the same size was 16.25 percent, whereas that between the root canal file and the gutta-percha point of smaller size was 86.5 percent,over filling was 5 precent. Conclusion The compatibility between the root canal file and the gutta-percha of the same size is smaller than that between the same root cannal file and a smaller gutta-percha point ;there exist differences among gutta-percha points of the same size.

关 键 词：牙胶尖 扩根器械 匹配性 根管充填 根管预备 

分 类 号：R783.3[医药卫生—口腔医学]