激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2011年
6期
68-69
,共2页
根尖定位仪%根尖狭窄破坏%根尖孔直径
根尖定位儀%根尖狹窄破壞%根尖孔直徑
근첨정위의%근첨협착파배%근첨공직경
electronic apex locator%destroyed apical constriction%diameter of apical foramen
目的：比较Propex、Raypex5根尖定位仪在根尖狭窄破坏情况下定位根尖孔位置的准确性。方法：选取20颗新鲜拔除的单根管恒牙,采用锥形金刚砂针截去根尖,顺根管方向逆向自根尖破坏根尖狭窄,并放入实验模型中,使用Propex、Raypex5根尖定位仪定位根尖孔位置,比较两种根尖定位仪在不同根尖孔直径情况下测量结果与准确性的差异。结果：根尖孔开放情况下,同一根管,两种根尖定位仪测量值差值之间差异无显著性（P〉0.05）;以±0.5mm作为每个样本实际长度和电测长度差值的允许范围,同种根尖定位仪,不同根尖直径范围下,准确率差异有显著性（P〈0.05）,准确率随根尖直径增加而降低。结论：根尖狭窄被破坏后,根尖孔大小对Propex、Raypex5测量准确性有影响。临床上对根尖有吸收破坏或根尖未发育完全的患牙采用Propex、Raypex5电测法测量时,应考虑其可能的误差,配合试尖、X线等其他方法进行根尖定位。
目的：比較Propex、Raypex5根尖定位儀在根尖狹窄破壞情況下定位根尖孔位置的準確性。方法：選取20顆新鮮拔除的單根管恆牙,採用錐形金剛砂針截去根尖,順根管方嚮逆嚮自根尖破壞根尖狹窄,併放入實驗模型中,使用Propex、Raypex5根尖定位儀定位根尖孔位置,比較兩種根尖定位儀在不同根尖孔直徑情況下測量結果與準確性的差異。結果：根尖孔開放情況下,同一根管,兩種根尖定位儀測量值差值之間差異無顯著性（P〉0.05）;以±0.5mm作為每箇樣本實際長度和電測長度差值的允許範圍,同種根尖定位儀,不同根尖直徑範圍下,準確率差異有顯著性（P〈0.05）,準確率隨根尖直徑增加而降低。結論：根尖狹窄被破壞後,根尖孔大小對Propex、Raypex5測量準確性有影響。臨床上對根尖有吸收破壞或根尖未髮育完全的患牙採用Propex、Raypex5電測法測量時,應攷慮其可能的誤差,配閤試尖、X線等其他方法進行根尖定位。
목적：비교Propex、Raypex5근첨정위의재근첨협착파배정황하정위근첨공위치적준학성。방법：선취20과신선발제적단근관항아,채용추형금강사침절거근첨,순근관방향역향자근첨파배근첨협착,병방입실험모형중,사용Propex、Raypex5근첨정위의정위근첨공위치,비교량충근첨정위의재불동근첨공직경정황하측량결과여준학성적차이。결과：근첨공개방정황하,동일근관,량충근첨정위의측량치차치지간차이무현저성（P〉0.05）;이±0.5mm작위매개양본실제장도화전측장도차치적윤허범위,동충근첨정위의,불동근첨직경범위하,준학솔차이유현저성（P〈0.05）,준학솔수근첨직경증가이강저。결론：근첨협착피파배후,근첨공대소대Propex、Raypex5측량준학성유영향。림상상대근첨유흡수파배혹근첨미발육완전적환아채용Propex、Raypex5전측법측량시,응고필기가능적오차,배합시첨、X선등기타방법진행근첨정위。
Objective：To compare with the accuracy of Propex and Raypex5 electronic apex locators in canals with destroyed apical constrictions.Methods ：Apices of 20 extracted human teeth with single root canal were cut off and the apical constrictions were destroyed to different diameters by a cone shaped diamond bur.Apical foramen were located with Propex and Raypex5 electronic apex locators in models and the results and the accuracy of the two in different diameter ranges of apical foramens were compared.Results：On condition of the apical constrictions destroyed,the differences between actual root canal length and measured root canal length of two electronic apex locators in the same root canals were no statistically significant（P0.05）,and the differences between actual root canal length and measured root canal length of the same electronic apex locators in root canals with different diameter ranges of apical foramens were statistically significant（P0.05）,and the accuracy of two electronic apex locators decreased with the increase of diameters of apical foramens.Conclusion：On condition of the apical constrictions destroyed,the accuracy of Propex and Raypex5 was influenced by diameters of apical foramens.Clinically the measurement error should be considered when Propex or Raypex5 was used to locating apical foramens in roots with destroyed apical constrictions or not well developed apices,and apical foramens locating should be done by electronic apex locators combined with other methods.
