顔面非対称患者の正貌骨格形態と下顎頭運動路の関連  [in Japanese] Relation between Frontal Morphology of the Facial Skeleton and the Condylar Path in Facial Asymmetry Patients  [in Japanese]

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Author(s)

    • 加藤 嘉之 KATO YOSHIYUKI
    • 東京医科歯科大学大学院医歯学総合研究科顎顔面矯正学専攻分野 Maxillofacial Orthognathics, Graduate School, Tokyo Medical and Dental University
    • 本橋 信義 MOTOHASHI NOBUYOSHI
    • 東京医科歯科大学大学院医歯学総合研究科顎顔面矯正学専攻分野 Maxillofacial Orthognathics, Graduate School, Tokyo Medical and Dental University
    • 今村 尚子 IMAMURA NAOKO
    • 東京医科歯科大学大学院医歯学総合研究科顎顔面矯正学専攻分野 Maxillofacial Orthognathics, Graduate School, Tokyo Medical and Dental University
    • 中川 史彦 NAKAGAWA FUMIHIKO
    • 東京医科歯科大学大学院医歯学総合研究科顎顔面矯正学専攻分野 Maxillofacial Orthognathics, Graduate School, Tokyo Medical and Dental University
    • 川元 龍夫 KAWAMOTO TATSUO
    • 東京医科歯科大学大学院医歯学総合研究科顎顔面矯正学専攻分野 Maxillofacial Orthognathics, Graduate School, Tokyo Medical and Dental University
    • 小野 卓史 ONO TAKASHI
    • 東京医科歯科大学大学院医歯学総合研究科顎顔面矯正学専攻分野 Maxillofacial Orthognathics, Graduate School, Tokyo Medical and Dental University
    • 黒田 敬之 KURODA TAKAYUKI
    • 東京医科歯科大学大学院医歯学総合研究科顎顔面矯正学専攻分野 Maxillofacial Orthognathics, Graduate School, Tokyo Medical and Dental University

Abstract

It has been reported that skeletal facial asymmetry is correlated with condyle path asymmetry on protrusive movement. In this article, we investigated the degree and the direction of the condyle path asymmetry on open, protrusive, and lateral movements, and their relationship with skeletal asymmetry in the frontal dimension.<BR>The subjects were 35 patients with various facial patterns, (26 females, and 9 males ; mean age, 21.9±4. 8years). Standardized PA cephalograms were used for morphological analysis. The linear and angular measurements were based on the x-y coordinates, the Lo-Lo' plane as the x-axis, and the vertical line through Nc as the y-axis. Reference points, such as Mo, Mo', Go, Go', and Me, were chosen to analyze horizontal and vertical skeletal asymmetries. The measurements were used as skeletal asymmetry variables.<BR>Condylar movements were recorded with a computeraided Axiograph (CADIAXR, Gamma). Both horizontal condylar inclination (HCN) on the sagittal plane and the Bennet angle (BEN) on the horizontal plane were measured 5 mm from a reference point (RP), and the shortest distance between RP and the most translated position of the condyle (DIS) on the sagittal plane was measured. The difference between the right and left condyles was calculated and used as a condylar path asymmetry variable. Stepwise linear regression analysis was performed to pick up a valid skeletal asymmetry variable for describing the condylar path asymmetry variable.<BR>On open movement, stepwise linear regression analysis selected only deviation of Me as a valid parameter for the HCN difference between both condyles. Deviation of Me was also revealed to be a valid parameter for explaining the differences in HCN, BEN, and DIS on protrusive movement, and the differences in HCN and DIS on lateral movement. Upper dental arch asymmetry and horizontal cant of the occlusal plane were found to be effective parameters for HCN difference on protrusive movement. Upper dental arch asymmetry was also an effective parameter for BEN difference on lateral movement. These results indicated that horizontal and vertical skeletal facial asymmetry had a relationship with condylar path asymmetry in every mandibular movement.

Journal

  • Bulletin Of Japanese Society for Jaw Deformities  

    Bulletin Of Japanese Society for Jaw Deformities 10(3), 264-272, 2000-12-15 

    THE JAPANESE SOCIETY FOR JAW DEFORMITIES

References:  15

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Cited by:  3

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Codes

  • NII Article ID (NAID)
    10018946853
  • NII NACSIS-CAT ID (NCID)
    AN10366185
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    09167048
  • Data Source
    CJP  CJPref  J-STAGE 
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