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Observations of interproximal contact relations during clenching
K Kasahara1, H Miura, M Kuriyama
1Department of Fixed Prosthodontics, Faculty of Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-Ku, Tokyo 113-8549, Japan. k.kasahara.pro2@dent.tmd.ac.jp
The International Journal of Prosthodontics
|February 24, 2001
Summary
Molar teeth exhibit small gaps at rest, but these spaces close during clenching. This study used a charge-coupled device (CCD) microscope to investigate interproximal contact dynamics in vivo.
Area of Science:
- Dental science
- Biomechanics
- Microscopy
Background:
- Previous research indicates molar teeth pulsate at rest and displace during maximal clenching.
- Understanding interproximal contact is crucial for occlusion and dental health.
Purpose of the Study:
- To investigate interproximal contact between teeth during clenching using a charge-coupled device (CCD) microscope.
- To quantify the dynamic changes in tooth spacing during occlusal force application.
Main Methods:
- In vivo study on two subjects with normal dentition.
- Utilized a CCD microscope to observe interproximal spaces, detecting them via light bands.
- Measured tooth contact tightness with stainless steel strips of varying thickness.
- In vitro analysis correlated light band width with interproximal distance.
Main Results:
- A resting interproximal distance of 3 to 21 microns was observed between adjacent teeth.
- This observed distance disappeared completely during clenching at maximal intercuspation.
Conclusions:
- Teeth do not maintain contact with adjacent teeth when at rest.
- Interproximal contact is established only during the act of clenching.