International journal of paediatric dentistry · 2025
The Impact of Asymmetrical Occlusion on Children in the Mixed Dentition Period: A Cross-Sectional Study.
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Kusashio Nao, Hasegawa Yoko, Yoneda Hiroyuki, Shiramizu Masako, Nakamura Yuki, Yamamoto Takafumi, Ono Takahiro
Аннотация
BACKGROUND: Asymmetrical occlusion in children may influence maxillofacial development and oral function, yet its clinical relevance remains underexplored.
AIM: To investigate the relationship between asymmetrical occlusion and oral/physical functions in schoolchildren during the mixed dentition period.
DESIGN: A cross-sectional study of 374 (192 boys and 182 girls) schoolchildren (Hellman's dental age IIIA-IVA) was conducted. Asymmetry indices (AIs) were calculated using occlusal force/contact area data measured with the dental prescale. Oral and physical functions were assessed using masticatory performance, grip strength, and walking speed. Statistical analyses included Chi-squared test, Mann-Whitney U test, Spearman's rank correlation, Kruskal-Wallis test, and multiple regression analysis.
RESULTS: AI, an indicator of unilateral occlusion, varied significantly across dental age groups (p = 0.011), peaking in stage IIIC. In IIIA, AI was correlated with age and masticatory performance; in IIIB and IIIC, it correlated with both oral and physical functions; and in IVA, with body size. Multiple regression revealed that lower occlusal force/area and slower chewing rates significantly explained greater asymmetry.
CONCLUSIONS: Asymmetrical occlusion in the mixed dentition showed weak but significant correlations with some oral functions, without consistent links to physical functions. Its cross-sectional design precludes causal inference, warranting further longitudinal studies.
AIM: To investigate the relationship between asymmetrical occlusion and oral/physical functions in schoolchildren during the mixed dentition period.
DESIGN: A cross-sectional study of 374 (192 boys and 182 girls) schoolchildren (Hellman's dental age IIIA-IVA) was conducted. Asymmetry indices (AIs) were calculated using occlusal force/contact area data measured with the dental prescale. Oral and physical functions were assessed using masticatory performance, grip strength, and walking speed. Statistical analyses included Chi-squared test, Mann-Whitney U test, Spearman's rank correlation, Kruskal-Wallis test, and multiple regression analysis.
RESULTS: AI, an indicator of unilateral occlusion, varied significantly across dental age groups (p = 0.011), peaking in stage IIIC. In IIIA, AI was correlated with age and masticatory performance; in IIIB and IIIC, it correlated with both oral and physical functions; and in IVA, with body size. Multiple regression revealed that lower occlusal force/area and slower chewing rates significantly explained greater asymmetry.
CONCLUSIONS: Asymmetrical occlusion in the mixed dentition showed weak but significant correlations with some oral functions, without consistent links to physical functions. Its cross-sectional design precludes causal inference, warranting further longitudinal studies.