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Evaluation of obturator prostheses using vibration analysis.

M Oki1, H Taniguchi, T Ohyama

  • 1Department of Maxillo-Facial Prosthetics, Graduate School, Tokyo Medical and Dental University, Japan.

Journal of Medical and Dental Sciences
|August 6, 2002
PubMed
Summary

The hollow type obturator prosthesis demonstrated superior vibration damping compared to solid and buccal flange types. This suggests the hollow design may offer better energy absorption for maxillectomy rehabilitation.

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Area of Science:

  • Biomedical Engineering
  • Prosthodontics
  • Materials Science

Background:

  • Obturator prostheses are crucial for restoring function in maxillectomy patients.
  • Understanding the dynamic behavior of different obturator designs is essential for optimizing clinical outcomes.

Purpose of the Study:

  • To conduct an in vitro evaluation of vibration characteristics for three distinct obturator prosthesis bulb types.
  • To identify the optimal obturator prosthesis design based on vibration analysis and energy absorption capabilities.

Main Methods:

  • Modal analysis was employed to assess vibration patterns of solid, buccal flange, and hollow type obturator prostheses.
  • Frequency response functions were recorded using an FFT analyzer after shaker excitation.
  • Transient response simulations were performed to compare energy absorption rates via decay rate analysis.

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Main Results:

  • Modal shapes across all three obturator types were found to be similar.
  • The hollow type obturator exhibited the smallest amplitudes at rests and clasps.
  • Transient response simulations revealed significantly higher decay rates for the hollow type (p < 0.01).

Conclusions:

  • Modal analysis indicates the hollow type obturator prosthesis possesses the steepest vibration decay slope.
  • The hollow design demonstrates superior energy absorption, suggesting it may be the most effective for clinical application in maxillectomy rehabilitation.