摘要
目的:分析上颌第一磨牙根管弯曲位置、方向及弯曲度。方法:收集80个上颌第一磨牙,在根管中分别插入15#-20#扩大针,拍摄近远中向和颊舌向X线片,用Photoshop6.0软件测量根管弯曲位置、方向和弯曲度。结果:上颌第一磨牙腭侧根管通畅、较直。远中颊侧根管80%在近远中方向、45%在颊舌方向有>5°的明显弯曲,弯曲位置多位于根中1/3,且近远中向弯曲度明显大于颊舌向(P<0.05)。近中颊根颊侧根管在近远中方向、颊舌方向分别有82.5%、77.5%出现>5°的明显弯曲。两个方向上的弯曲度无明显差异(P>0.05)。35%的标本探通了近颊根舌侧根管,其在近远中向、颊舌向出现明显弯曲的比例达91%和83%。结论:上颌第一磨牙四个根管在近远中向、颊舌方向均有不同程度的弯曲,其第二弯曲出现的情况也各不相同。
Objective：To analyse the root canal curvature frequency,position,direction and degree of the maxillary first molars.Method：80 randomly selected first maxillary molars were used in the study.Radiograph of teeth in buccolingual and mesiodistal directions with 15-20^# reamers in root canals was calculated and analysed by Photoshop 6.0 .Result：Lingual root canals of first maxillary molars showed no curvatures.Distobuccal root canals were 80% curved in mesiodistal direction and 45% in buccolingual direction.The curvature was in the middle 1/3 region and the curvature degree in mesiodistal direction was significant different with that in buccolingual direction （P〈0.05）.MB1 root canals were 82.5% curve in mesiodistal direction,and 77.5% in buccolingual direction .There is no difference of curvature degree in the two directions. MB2 root canals were found by the rate of 35% and were 91% curved in mesiodistal direction and 83% in buccolingual direction.Conclusion： Majority of the four root canals of first maxillary molars have curvatures at various degree in mesiodistal and buccolingual directions,The second curvatures of them were also different.
出处
《临床口腔医学杂志》
2006年第10期610-612,共3页
Journal of Clinical Stomatology
关键词
上颌第一磨牙
根管
弯曲
first maxillary molar
root canal
curvature
