咬合検査機器による咬合接触面積測定の術者内信頼性に関する研究 Reliability of Measurements of the Occlusal Contact Area Obtained with an Occlusal Examination Device

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目的: 感圧シートを用いる咬合検査機器による咬頭嵌合位における咬合接触面積測定について, 一般化可能性理論を応用し, 測定日数と繰り返し回数を考慮に入れた術者内信頼性を検討すること.<BR>方法: 被験者は健常有歯顎者男性10名を選択した. 咬頭嵌合位における歯列全体の咬合接触面積測定はデンタルプレスケール (R) を用いた. 咬みしめ強度は中程度と最大とした.測定日2日を設け, 3回の繰り返し測定を行った. 術者内信頼性の推定には, 測定日数と繰り返し回数を相とする一般化可能性研究を行った. 次に決定研究を行い, 3つの信頼性の指標, 信頼度指数, 測定の標準誤差と探知可能な最小差を算出した. 分析的な目標を信頼度指数0.9以上とした.<BR>結果: 両咬みしめ強度において被験者, 測定日数と測定回数のかかわる交互作用が測定誤差に与える影響が大きかった. また信頼性の指標は, 測定1回の単独測定よりも複数日, 複数回から得られる平均値のほうが良好な信頼性を示した. 信頼度指数0.9以上の測定値を得るためには, 中程度咬みしめにおいて測定日数2日, 繰り返し回数3回による6回以上の平均値, 最大咬みしめでは, 測定日数1日, 繰り返し回数3回以上あるいは測定日数2日, 繰り返し回数2回以上の平均値が必要であった.<BR>結論: 感圧シートを応用した咬合検査機器の咬合接触面積測定では, 術者内信頼性は測定日数と繰り返し回数を増加させることにより向上する.

Purpose: To investigate the intra-rater reliability of the occlusal contact area measured with an occlusal examination device of a pressure-sensitive sheet (Dental Prescale System<SUP> (®) </SUP>) by using generalizability theory.<BR>Methods: Two occlusal conditions: medium clenching (MEC) and maximum (MAC), were selected. Subjects were ten males with healthy complete dentition. Measurement variability was estimated both among repetitions and between days using a repeated-measures study design, which provided 3 measurements during the same test, and 3 additional clenchings at a second test 7 days after the initial measurement. Generalizability study was used to assess the relative contribution of identified error sources (subject, occasion, and repetition) to the total measurement error. For intra-rater applications, an index of dependability, the standard error of measurement (SEM), and the smallest detectable difference (SDD) at the 0.05 level were estimated using decision study.<BR>Results: The measurement variability included two-way interaction components and a residual component, indicating that these interaction effects were important sources of measurement error. At least six measurements in MEC taken on two occasions (three measurements per occasion), and three measurements taken on a single occasion, or four measurements taken on two occasions (two measurements per occasion), for MAC, were necessary to obtain an index of dependability over 0.9. The SEM for an index of dependability over 0.9 was below 1.17mm<SUP>2</SUP> for MEC and 1.89mm<SUP>2</SUP> for MAC. Again, the SDD was below 3.24mm<SUP>2</SUP> for MEC and 5.24mm<SUP>2</SUP> for MAC.<BR>Conclusions: The clinical implication of these findings was that intra-rater reliability for occlusal contact area measurements could best be enhanced by averaging multiple measurements rather than by using a single measurement.

収録刊行物

  • 日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society

    日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society 46(3), 347-356, 2002-06-10

    社団法人 日本補綴歯科学会

参考文献:  34件中 1-34件 を表示

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各種コード

  • NII論文ID(NAID)
    10008630689
  • NII書誌ID(NCID)
    AN00197911
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03895386
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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