Observation on the Main Occluding Area in Mastication Part III: The Relation between the Main Occluding Area and the Tooth Fracture of the Inlay-restored Tooth

DOI 12 Citations 17 References
  • Kato Hitoshi
    <I>Graduate School, Tokyo Med. and Dent. Univ., Div. of Oral Health Sciences, Dept. of Restorative Sciences, Fixed Prosthodontics</I>
  • Miura Hiroyuki
    <I>Graduate School, Tokyo Med. and Dent. Univ., Div. of Oral Health Sciences, Dept. of Restorative Sciences, Fixed Prosthodontics</I>
  • Hasegawa Shigeo
    <I>Meirin College</I>
  • Yoshida Keiichi
    <I>Graduate School, Tokyo Med. and Dent. Univ., Div. of Oral Health Sciences, Dept. of Restorative Sciences, Fixed Prosthodontics</I>
  • Tanaka Yoshihiro
    <I>Graduate School, Tokyo Med. and Dent. Univ., Div. of Oral Health Sciences, Dept. of Restorative Sciences, Fixed Prosthodontics</I>

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Other Title
  • 続々・咀嚼時，主機能部位の観察‐インレー装着歯に起こった歯質の破折との関係‐
  • Part III : The Relation between the Main Occluding Area and the Tooth Fracture of the Inlay-restored Tooth
  • ―インレー装着歯に起こった歯質の破折との関係―

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In order to clear the functional force loading on the occlusal surface, we explored the relation between the main occluding area and tooth fracture of an inlay-restored tooth. From the observation of 44 cases the following conclusions were obtained:<BR>1. Tooth fracture of an inlay-restored tooth could be classified into two types: fracture at the margin of the inlay (margin fracture), and fracture extending over the cusp (cusp fracture) .<BR>2 . In many cases, tooth fracture occurred at the functional cusp and coincided with the main occluding area; therefore, the main cause of the fracture could be recognized as mastication on the main occluding area.<BR>3 . Care must be taken to the main occluding area when restoring.

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