Noncarious Cervical Lesions in Relation to Toothbrushing Habit, Occlusal Force, Occlusal Contact Area, and Average Pressure

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  • TAKANO Tomotsugu
    Okadama Base of Ground Self-Defence Force:Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University
  • TAKEHARA Junji
    Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University
  • MORITA Manabu
    Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University

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Other Title
  • 非う蝕性歯頸部欠損と歯磨き習慣,咬合力,咬合接触面積および平均圧力との関係
  • ヒウショクセイ シケイブ ケッソン ト ハミガキ シュウカン コウゴウリョク コウゴウ セッショク メンセキ オヨビ ヘイキン アツリョク トノ カンケイ

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Abstract

The purpose of this study was to examine the relationship of noncarious cervical lesions (NCCLs) with the toothbrushing habit, bruxing habit, occlusal force, occlusal contact area, and average pressure. One hundred and thirty male (average : 36.2 years old) self-defense officials at Okadama Base of the Ground Self-Defence Force participated in this study. All existing teeth were examined for the presence and type of NCCL using the tooth wear index. Then, they were interviewed regarding bruxing and toothbrushing habits. Finally, occlusal force, occlusal contact area, and average pressure were measured using a pressure-detecting sheet. Seventy-eight subjects (60.0%) had at least one NCCL-tooth. A total of 3, 708 were examined, and 298 teeth (8.0%) were diagnosed as having NCCLs. The number of teeth with NCCL Grade 2 (defect less than 1 mm deep) was 208, followed by Grade 3 (41 teeth, defect 1-2 mm deep) and Grade 1 (40 teeth, minimal loss of contour). The prevalence of teeth with NCCLs was greater in the maxilla than mandible. Most NCCL-teeth were premolars. There was no significant difference in teeth with NCCLs between left and right sides. Logistic regression analysis revealed that the age (36 years or older, OR=2.43), toothbrushing pressure (400 g, OR=4.88), and occlusal contact area (>23.1 mm^2, OR=5.11) were associated with the presence of NCCL-teeth. It was concluded that aging, toothbrushing pressure, and occlusal factors were associated with the presence of NCCLs.

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