The application of laser holograph-speckle interferometry for measuring rotation of abutment teeth.

Author: Yan-zhen ZHANG ¹ ; Zhi ZHANG
Author Information

1. Department of Stomatology, 2nd Affiliated Hospital, College of Medical Sciences, Zhejiang University, Hangzhou 310009, China. zyz85@hotmail.com
Publication Type:Journal Article
MeSH: Adult; Dental Abutments; Denture, Partial, Fixed; Humans; Interferometry; methods; Male; Rotation
From:Chinese Journal of Stomatology 2006;41(9):563-564
CountryChina
Language:Chinese
Abstract:
OBJECTIVETo explore the rotation of abutment teeth of fixed partial denture in chewing and to analyze the effect of rotation on the stability of abutment teeth.
METHODSLeft mandible (without the second premolar and the first molar) was used for specimen. Holograph-speckle interferometry was employed for measuring the rotation angle.
RESULTSThe maximal rotation angle was no more than 0.6 degrees and change of the angle was obviously in nonlinearity, when load increased from 9.8 N to 225.4 N.
CONCLUSIONSThe laser holograph-speckle interferometry could be used to measure rotation of abutment teeth. The intricate surface contacting was the main reason for rotation and this rotation had no bad effect on abutment teeth of fixed partial denture in daily use.