Open Access, Peer-reviewed, Quarterly
pISSN 0301-2875
eISSN 2005-3789
    J Korean Acad Prosthodont. 2013 Jul;51(3):199-207. Korean.
    Published online Jul 29, 2013.
    https://doi.org/10.4047/jkap.2013.51.3.199
    Copyright © 2013 The Korean Academy of Prosthodontics
    Original Article

    Analysis of occlusal contact and guidance pattern during maximal intercuspal position and protrusive movement

    Jiyeon Kim, DMD, MSD, Kang-Hyun Kim, DMD, Kwantae Noh, DMD, MSD, PhD, Hyeong-Seob Kim, DMD, MSD, PhD, Yi-Hyung Woo, DMD, MSD, PhD and Ahran Pae, DMD, MSD, PhD
      • Department of Prosthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea.
    • Corresponding Author: Ahran Pae. Department of Prosthodontics, School of Dentistry, Kyung Hee University, Hoegi-Dong 1, Dongdaemun-Gu, Seoul, 130-701, Korea. +82 2 958 9340: Email: ahranp@khu.ac.kr
    Received June 18, 2013; Revised July 09, 2013; Accepted July 15, 2013.

    This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

    Abstract

    Purpose

    The importance of occlusal contacts of the natural dentition for durability of teeth, mandibular stabilization, and restorative dentistry is well known. The purpose of this study is to analyze the occlusal contact and guidance pattern of Koreans by evaluating the static occlusion on maximal intercuspal position and measuring dynamic occlusion during straight protrusion.

    Materials and methods

    The occlusal contacts at maximal interincisal position and the occlusal guidance pattern during straight protrusion of 29 subjects were recorded with shimstock foil (Whaledent, Langenau, Germany), T-Scan III (Tekscan Inc., Boston, MA, USA), polyvinylsiloxane registration material (Genie Bite, Sultan Healthcare, Hackensack, NJ, USA) and compared. Occlusal registration procedures were repeated 3 times. The position was fixed to an upright position and the head position was fixed with the Frankfurt horizontal plane paralleling the horizontal plane. Fisher's Exact Test (R-General Public License, ver. 2.14.1) and Pearson's Test were used to assess the significance level of the differences between the experimental groups (α=.05).

    Results

    When using shimstock foil, T-Scan III system, and polyvinylsiloxane registration material, most of the patients showed contact on anterior, premolar, and molar teeth during maximal intercuspal position. Approximately 51% of maximal intercuspal position showed anterior contact using shimstock foil. When examining the protrusive movement using shimstock foil and T-Scan III system, guidance pattern with the central incisor was the most common.

    Conclusion

    During maximal intercuspal position, there were cases in which not all of the teeth showed occlusal contact. During mandibular protrusive movements, one or more maxillary central incisors frequently joined in straight protrusion and the posterior teeth were disoccluded. Therefore, the anterior teeth protect the posterior teeth, and vice versa. Thus, mutually protected occlusion should be applied when reconstructing occlusion.

    Keywords
    Occlusal pattern; Maximal intercuspal position; Protrusive movement; Mutually protected occlusion

    Figures

    Fig. 1
    Classification of occlusal contact pattern.

    Fig. 2
    Number of contact tooth of Mx. in maximal intercuspal position evaluated with shimstock foil (n = 406); CI: central incisor, LI: lateral incisor, C: canine, P1: first premolar, P2: second premolar, M1: first molar, M2: second molar.

    Fig. 3
    Distribution of contact pattern evaluated with shimstock foil (n = 29).

    Fig. 4
    Number of contact tooth of Mx. in maximal intercuspal position evaluated with T-Scan III system (n = 406); CI: central incisor, LI: lateral incisor, C: canine, P1: first premolar, P2: second premolar, M1: first molar, M2: second molar.

    Fig. 5
    Distribution of contact pattern evaluated with T-Scan III system (n = 29).

    Fig. 6
    Number of contact tooth of Mx. in maximal intercuspal position evaluated with polyvinylsiloxane registration material (n = 406); CI: central incisor, LI: lateral incisor, C: canine, P1: first premolar, P2: second premolar, M1: first molar, M2: second molar.

    Fig. 7
    Distribution of contact pattern evaluated with polyvinylsiloxane registration material (n = 29).

    Fig. 8
    Number of contact tooth of Mx. in straight protrusion evaluated with shim-stock foil (n = 406); CI: central incisor, LI: lateral incisor, C: canine, P1: first premolar, P2: second premolar, M1: first molar, M2: second molar.

    Fig. 9
    Distribution of contact pattern evaluated with shimstock foil (n = 29).

    Fig. 10
    Number of contact tooth of Mx. in straight protrusion evaluated with T-Scan III system (n = 406); CI: central incisor, LI: lateral incisor, C: canine, P1: first premolar, P2: second premolar, M1: first molar, M2: second molar.

    Fig. 11
    Distribution of contact pattern evaluated with T-Scan III system (n = 29).

    Tables

    Table 1
    Classification of occlusal contact pattern (maximal intercuspal position)

    Table 2
    Classification of occlusal guidance pattern (protrusive movement)

    Table 3
    Comparison of P-value

    Table 4
    Comparison of P-value

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    MeSH Terms
    Bicuspid
    Bites and Stings
    Boston
    Delivery of Health Care
    Dental Occlusion
    Dentistry
    Dentition
    Eugenol
    Head
    Humans
    Incisor
    Licensure
    Molar
    Tooth
    Zinc Oxide
    Metrics
    Share
    Figures
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    Tables
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