摘要
目的比较根尖切除术中传统慢速手机与超声器械对于根尖倒预备的不同影响。方法借助扫描电镜对48颗离体前磨牙进行观察研究,使用AutoCAD2005制图软件辅助计算。结果使用传统慢速手机进行根尖倒预备后的牙根硬组织最小厚度(均值0.15mm)明显低于使用超声器械(S129D均值0.82mm,S129均值0.76mm),具有统计学显著意义(P<0.05)。结论使用超声器械进行根尖倒预备可以有效的保护牙根硬组织,保持牙根的强度。
Objective ：To evaluate the effect of retrograde preparation by using slow-speed handpiece or by ultrasonic tips. Methods：Forty-eight extracted premolars were inspected with Scanning Electron Microscope for the minimum dentine thickness recorded after preparation of root-end cavities by low-speed handpiece and ultrasonic instrument respectively. Results： By using slow-speed handpiece, the minimum dentine thickness recorded after the preparation of root-end cavities was 0.15 mm;whereas that was 0.82 mm and 0.76 mm by ultrasonic instrument with S12 9D and S12 9 respectively（ handpiece vs uhrosonic instrument, P 〈 0.05 ）. Conclusion： Ultrasonic instrument is feasible in the retropreparation of root-end in apicection.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2006年第2期159-161,共3页
Journal of Practical Stomatology
关键词
扫描电镜
超声器械
根尖倒预备
Scanning electron microscopic
Ultrasonic instruments
Retropreparation
