Abstract
BackgroundThis study aimed to investigate the distribution of objective total occlusal force (TOF) and its association with dental health indicators: dental status, number of natural teeth (NT), natural and rehabilitated teeth, natural posterior teeth (NT-Post), and natural and rehabilitated posterior teeth among Korean elders after controlling for various confounders encompassing socio-demographic factors, behavioral factors and health/oral health factors.MethodsThis cross-sectional study recruited 551 elders from the Sungbook-Gu health education cohort. TOF was measured using Prescale II as an outcome variable. Dental health indicators assessed by dentists were the main explanatory variables. Analysis of covariance and multivariable linear regression models were applied to evaluate the adjusted association of dental health indicators with TOF. Gender and age group stratified analyses were also applied.ResultTOF was higher in dentate elders than denture wearers in males and younger elders. The adjusted mean of TOF and standard error was 464.24 ± 17.15 N for dentate elders, 297.15 ± 28.85 N for partial denture wearers, 280.42 ± 47.71 N for complete denture wearers. Among all dental health indicators, NT-Post showed the highest association with TOF (partial r = 0.330, p < 0.001, R2 = 0.15), followed by NT (partial r = 0.329, p < 0.001, R2 = 0.16). Older elders highlighted the association of NT (partial r = 0.37, p < 0.001, R2 = 0.18). Males decreased the association of NT (partial r = 0.30, p < 0.001, R2 = 0.20) and NT-Post (partial r = 0.29, p < 0.001, R2 = 0.20).ConclusionTOF was significantly associated with dental health indicators, and its association was modified by sex and age group.
Highlights
This study aimed to investigate the distribution of objective total occlusal force (TOF) and its associa‐ tion with dental health indicators: dental status, number of natural teeth (NT), natural and rehabilitated teeth, natural posterior teeth (NT-Post), and natural and rehabilitated posterior teeth among Korean elders after controlling for vari‐ ous confounders encompassing socio-demographic factors, behavioral factors and health/oral health factors
Crude and adjusted occlusal force according to dental health indicators TOF was highly correlated with dental status (0: dentate; 1: partial denture (PD); 2: complete denture (CD)), NT and natural and rehabilitated teeth (NRT) (Fig. 2): correlation coefficient (r) of − 0.25 for dental status, 0.36 for NT, and 0.20 for NRT
According to Bonferroni’s post hoc multiple comparisons test in analysis of variance (ANOVA), the crude and adjusted TOF were higher in dentate elders than in denture elders (p < 0.001) (Table 2)
Summary
This study aimed to investigate the distribution of objective total occlusal force (TOF) and its associa‐ tion with dental health indicators: dental status, number of natural teeth (NT), natural and rehabilitated teeth, natural posterior teeth (NT-Post), and natural and rehabilitated posterior teeth among Korean elders after controlling for vari‐ ous confounders encompassing socio-demographic factors, behavioral factors and health/oral health factors. The Korean National Health Insurance has covered two implants and dentures for Koreans aged over 65 Rehabilitation such as implants and dentures would have improved in their oral function, the proportion of Korean elders who had limitations in chewing ability was still at 45.8% [6]. Rehabilitation of lost teeth could reduce the risk of cognitive impairment because it could potentially increase the occlusal force [8]. These statistics outline that the dental problems could be related to occlusal force, which indicated that total occlusal force is important
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