An experimental study of magnetic maxillary expansion by electronic speckle pattern interferometry
- VernacularTitle:用电子散斑干涉技术作磁力扩弓效应的实验研究
- Author:
Hongyan HUANG
;
Chunzi ZHANG
;
Daming QIU
- Publication Type:Journal Article
- Keywords:
Magnetics;
NdFeB magnet;
Palatal expansion techniq ue;
Electronic speckle pattern interferometry(ESPI)
- From:
Journal of Practical Stomatology
2001;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the biomechanical effect of magn et ic expansion by a new electronic speckle pattern interferometry. Methods :One fresh human skull of 12 years old with intact suture tissues and pe riodontal membrane was adopted. Magnetic expansion was loaded on the maxilla for 1,5,15,30 and 60 min respectively by magnetic force (NdFeB).Relative informa tion on the maxillary complex was acquired by electronic speckle pattern interfe rometry(ESPI). The deforming fringes was processed by the microcomputer image s ystem and the corresponding out-of plane displacement of the maxillary complex was analyzed. Results:Fringes of the maxillary complex were obs erved on monitor screen when magnetic force was loaded. From 1 min to 30 min-lo ading the fringe density was increasing, but decreased 1 h after loading. There was no fringe in the suture of the skull. Greate deformity was found on the lowe r part of maxilla. Conclusion:Magnetic force of expansion is con centrated in the deep structure of the maxillary complex.
