Gender and age group modified association of dental health indicators with total occlusal force among Korean elders

Abstract

Background This 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. Methods This 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. Result TOF 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). Conclusion TOF was significantly associated with dental health indicators, and its association was modified by sex and age group.

Evaluation of automatic cleaning in analysis of occlusal force

“…The present results showed a signifi cant diff erence in occlusal force between before and after cleaning. The rate of reduction in occlusal force was 24.6% for Group M with manual cleaning, which is consistent with previous reports of a reduction rate of 25.9% [10] and 21-26% [8] in occlusal force due to manual cleaning of the Dental Prescale II. These indicate that a cleaning process is needed when Dental Prescale II is used.…”

“…As ways of measuring occlusal force, methods using a strain gauge transducer, piezoresistive transducer, pressure transducer, or pressure-sensitive film have been reported. Among these, the method using a dental prescale, which is a pressure-sensitive film, is widely used for young adults, the elderly, orthodontic patients, removable denture wearers, and implant denture wearers [1,[4][5][6][7][8][9]. Occlusal force has been reported to be significantly reduced with tooth loss, but significantly increased with dental treatment [5].…”

Biomechanical Modelling for Tooth Survival Studies: Mechanical Properties, Loads and Boundary Conditions—A Narrative Review

“…Shinogaya et al (2001) reported a lower occlusal force and higher contact area between teeth in senior subjects compared to younger subjects [ 208 ]. Recent studies also present results in accordance [ 209 , 210 , 211 , 212 ]. Mechanical properties are also affected by the age of the specimen.…”

“…Shinogaya et al (2001) reported a higher MBF and occlusal contact area in males than in females [ 208 ]. Recent studies also present results indicating that MBF is greater in adult and elder males than females [ 209 , 210 , 212 , 216 ].…”

“…The presence of artificial dentures (partial or complete) also conditions remaining teeth lifespan. Several studies indicate that MBF decrease for teeth loss is not completely reverted by dentures, being MBF bigger the smaller the denture [ 210 , 211 ]. Endodontically treated patients present higher MBF values due to sensitivity loss [ 220 ].…”