Document Detail

Vibration analysis of obturator prostheses with different bulb height designs.
MedLine Citation:
PMID:  12641382     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to investigate the effect on the vibratory characteristics of a cast hollow obturator prosthesis retainer when varying its bulb height. Bulb parts with high (H), middle (M), and low (L) lateral walls were prepared. A Vibration Generator was used to excite the three obturators, while a Laser-Doppler Vibrometer was employed to detect the vibrations at specified measurement points. The frequency response functions of each obturator were recorded on an FFT analyzer to enable their modal shapes to be identified. In addition, transient response simulations were carried out and the decay rate (DR) and the maximum amplitude (MA) of the rest and clasp parts of each obturator were obtained. These were statistically analyzed by ANOVA and Fisher's PLSD test (p < 0.01). The modal shapes were almost the same in all obturators. Significant differences were found in DR in all pairs among the three obturator prostheses, with the DR of the L type being the highest. On the other hand, there were no significant differences in MA. We conclude that the L type is preferable from the standpoint of its vibratory characteristics.
Makio Kobayashi; Meiko Oki; Shogo Ozawa; Takaaki Inoue; Hitoshi Mukohyama; Tsuyoshi Takato; Takashi Ohyama; Hisashi Taniguchi
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of medical and dental sciences     Volume:  49     ISSN:  1342-8810     ISO Abbreviation:  J. Med. Dent. Sci.     Publication Date:  2002 Dec 
Date Detail:
Created Date:  2003-03-18     Completed Date:  2003-05-15     Revised Date:  2010-04-12    
Medline Journal Info:
Nlm Unique ID:  9717112     Medline TA:  J Med Dent Sci     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  121-8     Citation Subset:  D; IM    
Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Japan.
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MeSH Terms
Analysis of Variance
Dental Prosthesis Design*
Dental Prosthesis Retention
Dental Stress Analysis
Fourier Analysis
Palatal Obturators*
Signal Processing, Computer-Assisted

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