CAJ | 학술논문

通过比较2 种根管形态下颌第二磨牙预备前后根管横断面面积的变化以探讨手用ProTaper器械预备的清理效果.选取具有融合牙根且根管为C形和2 个独立牙根的下颌第二恒磨牙各20 颗.使用改良Bramante模型在距根尖3、 5.5、 8 mm处横断,体视显微镜下拍摄手用ProTaper预备前后根管横断面形态.软件测量根管横断面面积并进行统计分析.结果显示S组与C组不同断面间两两比较不存在明显区别.结果说明根管的解剖形态对手用ProTaper预备后根管横断面面积的变化没有明显影响.
통과비교2 충근관형태하합제이마아예비전후근관횡단면면적적변화이탐토수용ProTaper기계예비적청리효과.선취구유융합아근차근관위C형화2 개독립아근적하합제이항마아각20 과.사용개량Bramante모형재거근첨3、 5.5、 8 mm처횡단,체시현미경하박섭수용ProTaper예비전후근관횡단면형태.연건측량근관횡단면면적병진행통계분석.결과현시S조여C조불동단면간량량비교불존재명현구별.결과설명근관적해부형태대수용ProTaper예비후근관횡단면면적적변화몰유명현영향.
Investigate the cleaning ability of manual ProTaper on mandibular second molars with C-shaped (c-shaped root) or normal root canal(separated root). Twenty mandibular second molars with C-shaped root or with separated roots were sectioned at 3.0, 5.5 and 8.0 mm from the root apex. The images of pre-preparation and F1, F2, and F3-prepapared of manual ProTaper were captured respectively. The cross-sectional areas of the canals were measured and the formula of area after treatment/area before treatment was used to calculate the area ratio. The data were analyzed by SPSS 10.0. The results showed that there was no statistically difference between cross-section root canal area ratios in two groups. Significant differences were found between the cross-section canal area ratio of F1 and F2, F1 and F3 at section 5 mm of S group, and F1 and F3 at section 3 mm of C group. The results suggested that the increasing of cross-section ratio of the two kinds of canals was not obviously concerned with their anatomical morphology.