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A Study on the Root Canal Taper of 33 Mandibular Second Premolars of Chinese with Single-canal

Author: PanLi
Tutor: LiSong
School: Anhui Medical University,
Course: Clinical Stomatology
Keywords: Microscopic CT (MCT) Mandibular second premolar Root canal Taper
CLC: R781.05
Type: Master's thesis
Year: 2010
Downloads: 32
Quote: 0
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Abstract

The purpose teenagers jaw the second premolars paragraphs original taper value, select the appropriate root canal preparation equipment for clinical reference, and discussed their changes associated with aging. Collected complete dental root canal patency single root canal away from the body of mandibular second molars 33, divided into two groups according to age. 13-23 years old as the youth group 23 ,35-80-year-old as the middle-aged group (n = 10). Micro-CT specimens from the apical to the coronal tomography to obtain a cross-sectional view of the root canal. Each root canal were divided into three segments - apical 1/3, 1/3 of the root and root cap segment 1/3 in the root canal of each piece of the upper and lower cross-sectional view through the 3D-DOCTOR Trial Version measuring its near and far to the caliber and buccolingual diameter calculated three sections mesiodistal and buccolingual root canal taper. Were compared between the two groups in different direction and the horizontal segment of each root canal taper difference, and the difference between the two groups in different directions and the horizontal segment taper. Second before 1.23 13-23 years old mandibular molars single root canal buccolingual are greater than the mesiodistal diameter but the closer apical, the smaller the gap between the two diameters, Jiyu nearly apical root canal cross-section of the more tend into a circle. The root canal taper buccolingual root canal taper is greater than the near and far to the root canal taper. Specific root pipe crown, the taper in apical 1/3: buccolingual: 0.32,0.21,0.25; near and far to be: 0.06,0.08,0.07. Buccolingual three sections taper of variance test significant differences (P lt; 0.05) between paragraphs the taper change of direction in the near and far, no differences in sex (P gt; 0.05). 2.10 35-80 years of age to mandibular second molar single tube its root canal diameter and root canal taper showed a decreasing trend compared with the youth group, but the apical foramen showed oval root in the lower 1/3 buccolingual gradually reduced to the diameter difference between near and far, the root canal cross-sectional shape into by the youth group often appear oblong oval. Specific root pipe crown, the taper in apical 1/3: buccolingual: 0.09,0.18,0.34; near and far to be: 0.06,0.06,0.02. Buccolingual three sections taper of variance test significant differences (P lt; 0.05) between paragraphs the taper change of direction in the near and far, no differences in sex (P gt; 0.05). Each direction, each level of root canal taper differences for different age groups had no statistical significance (P gt; 0.05). Conclusion 1. 13-23 years old single canal mandibular second premolar root canal from the root tip from the bottom-up flat round buccolingual diameter greater than the mesiodistal diameter the buccolingual taper also were greater than the past distal to the taper. Its mesiodistal diameter and taper line root canal treatment should reference the choice of instruments; 2 root canal is not a continuous conical which root canal buccolingual taper, changed significantly, the smallest taper root in 1/3, near and far, is not very different to the taper root canal up and down. Grow older, the basic root canal diameter decreasing trend, root canal taper decreasing trend; root canal taper to the tip 1/3) in some parts (such as buccolingual significant change compared with the youth group.

A Study on the Root Canal Taper of 33 Mandibular Second Premolars of Chinese with Single-canal

Abstract

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