[Analysis the effect on the stress of root canal wall of pulpless teeth by different degree of root canal preparation].

Abstract

OBJECTIVE:

To analyze the stress variations of wall of root canal of pulpless teeth that resulted from different diameters of root canal.

METHODS:

On the basis of the finite-element model of the mandibular first molar that modified by routine, diameter of root canal was modified and enlarged so as to the diameter of root canal was 1/3 and 1/2 of root diameter, then modified models were loaded and the maximal stress of each part of teeth and wall of root canal was calculated.

RESULTS:

The results revealed that enlargement of root canal diameter will bring on increase of stress of root canal wall at the orifice and coronal 1/3. The stress difference of lateral loading was greater than that of vertical loading.

CONCLUSION:

The principle of root canal preparation should be infected material removed and good shape of root canal gained. Over-preparation is unnecessary and harmful.

• Authors: Jin Hong, Wen-wei Xia, Huan-guo Xiong
• Journal: Shanghai kou qiang yi xue = Shanghai journal of stomatology (Shanghai Kou Qiang Yi Xue) Vol. 12 Issue 1 Pg. 23-6 (Feb 2003) ISSN: 1006-7248 [Print] China
• PMID: 14661457 (Publication Type: English Abstract, Journal Article)

Topics

• Dental Pulp Cavity (physiopathology)
• Dental Stress Analysis
• Humans
• Root Canal Preparation
• Tooth, Nonvital (physiopathology)