非頸動脈病変（NCCL）と関連因子：ブラジル南部のコホート研究におけるマルチレベル分析

Non-carious Cervical Lesions (NCCLs) and associated factors: a multilevel analysis in a cohort study in Southern Brazil.

抄録

目的:

1982年ペロタス出生コホートの成人における非頸動脈病変（NCCL）の有病率と、個人因子および歯に関する因子との関連を調査する。

AIM: To investigate the prevalence of Non-carious Cervical Lesions (NCCLs) and the association with individual and tooth-related factors in adults from the 1982 Pelotas Birth Cohort.

材料と方法:

参加者はインタビューを受け、31歳の時点で臨床検査を受けた。NCCLは、歯頸部に細菌の侵襲を伴わない歯組織の喪失と定義した。独立変数は、社会経済的特徴、人口統計学的特徴、行動的特徴、臨床的特徴とした。関連性は、マルチレベルポアソン回帰モデルを用いて検証した。

MATERIALS AND METHODS: Participants were interviewed and clinically examined at the age 31. NCCL was defined as loss of dental tissue without bacterial involvement in the cervical region. Independent variables were socioeconomic, demographic, behavioural and clinical characteristics. Associations were tested using a multilevel Poisson regression model.

結果:

539名が臨床検査を受け、NCCLの有病率は26％で、上顎（56.5％）と前歯（72.9％）に多く見られた。マルチレベル分析では，女性は男性よりも有病率が低く[PR 0.59 (0.48-0.73)]，22歳と30歳の両方で喫煙したと答えた人は，喫煙しなかった人よりもNCCLが多く[PR 1.65 (1.31-2.07)]，高頻度に歯磨きをする人は低頻度に歯磨きをする人よりも有病率が高かった[PR 1.26 (1.03-1.55)]。歯肉退縮はNCCLの有病率を10倍に増加させたが[PR 10.03 (8.15-12.35)]，歯周ポケット（4mm以上）の存在はNCCLの有病率を減少させた[PR 0.43 (0.28-0.66)]という結果が得られた。

RESULTS: 539 participants were clinically examined, with a 26% prevalence of NCCLs, which were more prevalent in the maxilla (56.5%), and in premolars (72.9%). In the multilevel analysis, women presented lower prevalence than men [PR 0.59 (0.48-0.73)]; those who reported smoking at both 22 and 30 years of age had more NCCLs than those who never smoked [PR 1.65 (1.31-2.07)]; and high frequency brushers presented higher prevalence than low frequency brushers [PR 1.26 (1.03-1.55)]. Gingival recession increased 10 times the prevalence of NCCLs [PR 10.03 (8.15-12.35)], while presence of periodontal pockets (≥4mm) reduced the prevalence of NCCLs [PR 0.43 (0.28-0.66)].

結論:

NCCLは，男性，喫煙者，歯磨き回数の多い人に多く見られた．歯周ポケットの存在はNCCLの有病率の低さと関連していたが，歯肉退縮は非むし歯性頸部病変の存在を示す強力な臨床的指標であった．この記事は著作権で保護されています。All rights reserved.

CONCLUSIONS: NCCLs were more prevalent in males, smokers, and those with higher frequency of toothbrushing. While the presence of periodontal pockets was associated with a lower prevalence of NCCLs, gingival recession was a strong clinical indicator for the presence of non-carious cervical lesions. This article is protected by copyright. All rights reserved.