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SDA患者における咬合器欠損のパターンと口腔健康関連QOL
Patterns of missing occlusal units and oral health-related quality of life in SDA patients.
PMID: 18699971
抄録
本研究の目的は、歯列弓短縮症(SDA)患者における咬合単位(OU)欠損のパターンと口腔健康関連QOL(OHRQoL)との関係を検討することである。SDAを有する被験者を6つの大学の補綴歯科クリニックから1ヶ月間連続して募集した。合計115名のSDA患者が参加した(平均年齢58.5±10.0歳、71%が女性)。欠損歯の位置と数を調べ、欠損OU数を算出した。OHRQoLを評価するために、日本語版口腔健康影響度プロファイル(OHIP-J)を実施し、OHIP-Jのサマリースコアを算出した。SDA対象者は、欠損OUまたは残存OUの前後長により分類した。様々な前後SDA長を持つ被験者群間のOHIP-Jの違いを調べるために回帰分析を行った。分析の結果、第2大臼歯の接触部のみを失った被験者は、より多くの歯を失った被験者よりも有意に良好なOHRQoLを示した[係数:11.1、95%信頼区間(CI):2.8-19.2、P = 0.02]。さらに、第一大臼歯の咬合接触がある群とない群では、統計的に有意な群間差が観察された(係数:12.8、95%信頼区間(CI):1.4~24.1、P = 0.03)。結論として、今回の結果は探索的なものであり、検証が必要であるが、OU欠損のパターンは、SDA被験者のOHRQoL障害に関連している可能性が高く、特に第一大臼歯の接触の有無が重要な役割を担っている。
The aim of this study was to explore the relationship between patterns of missing occlusal units (OUs) and oral health-related quality of life (OHRQoL) in subjects with the shortened dental arches (SDAs). Subjects with SDAs were recruited consecutively for 1 month from six university-based prosthodontic clinics. In total, 115 SDA subjects participated (mean age, 58.5 +/- 10.0 years; 71% female). The location and number of missing teeth were examined and the number of missing OUs was calculated. To evaluate OHRQoL, the Japanese version of the Oral Health Impact Profile (OHIP-J) was administered and the summary score of OHIP-J was calculated. The SDA subjects were categorized depending upon the anterior-posterior lengths of the missing or remaining OUs. Regression analyses were performed to investigate the OHIP-J differences between groups of subjects with various anterior-posterior SDA lengths. The analyses revealed that subjects who only lost the second molar contact exhibited significantly better OHRQoL than those who lost more teeth [coefficient: 11.1, 95% confidence interval (CI): 2.8-19.2, P = 0.02]. Furthermore a statistically significant group difference was observed between the groups with and without the first molar occlusal contact (coefficient: 12.8, 95% CI: 1.4 to 24.1, P = 0.03). In conclusion, although our results are of exploratory nature and need validation, patterns of missing OUs are likely to be related to the OHRQoL impairment in SDA subjects with the presence of first molar contact having a particularly important role.