The Journal of Advanced Prosthodontics

  • 제10권6호
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  • Pages.401-407
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  • 2018
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  • 2005-7806(pISSN)
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  • 2005-7814(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
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The influence of horizontal cephalic rotation on the deviation of mandibular position

  • Katayama, Naoto (Functional Occlusal Treatment, The Nippon Dental University Graduate School of Life Dentistry at Niigata) ;
  • Koide, Kaoru (Functional Occlusal Treatment, The Nippon Dental University Graduate School of Life Dentistry at Niigata) ;
  • Koide, Katsuyoshi (Comprehensive Dental Care, The Nippon Dental University Niigata Hospital) ;
  • Mizuhashi, Fumi (Removable Prosthodontics, The Nippon Dental University School of Life Dentistry at Niigata)
  • 투고 : 2017.11.13
  • 심사 : 2018.11.18
  • 발행 : 2018.12.31
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초록

PURPOSE. When performing an occlusal procedure, it is recommended that the patient should be sitting straight with the head in a natural position. An inappropriate mandibular position caused by an incorrect occlusal record registration or occlusal adjustment can result in damaged teeth and cause functional disorders in muscles and temporomandibular joints. The purpose of this study was to clarify the influence of horizontal cephalic rotation on mandibular position by investigating the three-dimensional positions of condylar and incisal points. MATERIALS AND METHODS. A three-dimensional jaw movement measurement device with six degrees of freedom (the WinJaw System) was used to measure condylar and incisal points. The subjects were asked to sit straight with the head in a natural position. The subjects were then instructed to rotate their head horizontally $0^{\circ}$, $10^{\circ}$, $20^{\circ}$, $30^{\circ}$, $40^{\circ}$, $50^{\circ}$and $60^{\circ}$ in the right or left direction. RESULTS. The results indicated that horizontal cephalic rotation made the condyle on the rotating side shift forward, downward, and toward the inside, and the condyle on the counter rotating side shift backward, upward, and toward the outside. Significant differences in deviations were found for angles of rotation higher than $20^{\circ}$. The incisal point shifted in the forward and counterrotating directions, and significant differences were found for angles of rotation higher than $20^{\circ}$. CONCLUSION. The mandibular position was altered by horizontal cephalic rotations of more than $20^{\circ}$. It is essential to consider the possibility of deviation of the mandibular position during occlusal procedures.

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참고문헌

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