Occlusal support predicts tooth loss in older Japanese people

Abstract

Objectives Many older people lose their teeth. However, few studies have examined whether the number of remaining teeth or the amount of occlusal support is more important for tooth loss that occurs in older age after adjusting for systemic factors. The purpose of this study was to investigate comprehensively the factors related to tooth loss over a period of 6 years, including occlusal support in 70‐ and 80‐year‐old community‐dwelling Japanese people. Methods This cohort study included 296 participants in the 70‐year‐old group and 232 in the 80‐year‐old group. The number of teeth of all participants was recorded at baseline and after 6 years, and the participants were divided into two groups according to the number of teeth lost (0 or 4 or more). Occlusal support was classified into three groups based on posterior occlusal support. Mean probing pocket depth, tooth brushing habits, frequency of dental check‐ups, education level, economic status and systemic factors (carotid atherosclerosis, hypertension, diabetes mellitus, dyslipidemia, cognitive function and smoking habits) were evaluated. Multiple logistic regression analysis was performed to investigate the relationship of tooth loss with occlusal support and systemic factors. Results Logistic regression analysis revealed that mean probing pocket depth (odds ratio [OR] = 5.70, 95% confidence interval [CI] = 2.70‐12.04, P < .01) and posterior occlusal support (reference = Eichner class A; Eichner B1‐3, OR = 4.33, 95% CI = 1.54‐12.17, P < .01; Eichner B4 or C, OR = 6.16, 95% CI = 1.17‐32.44, P = .03) were associated significantly with the loss of four or more teeth. Conclusions This study revealed that age itself is not a predictor of multiple tooth loss in community‐dwelling older Japanese people. Deep mean probing pocket depth and a lack of posterior occlusal support were significantly associated with the loss of four or more teeth.

Bidirectional Association between Tooth Loss and Hypertension: A Systematic Review and Meta-analysis

“…In our study, a total of 294 studies were considered for further review, including the results of key words search (n=290) and additional records identi ed from relevant reviews and reference lists of other studies (n=4). Through the careful reading of full texts, seven cohort studies [12][13][14][15][16][17][18] and nine cross-sectional studies [19][20][21][22][23][24][25][26][27] were thought eligible for meta-analysis ( Figure 1).…”

Will implants with a fixed dental prosthesis in the molar region enhance the longevity of teeth adjacent to distal free‐end edentulous spaces?

“…Second, smoking and diabetes were not included as adjustment variables in this study even though they may be associated with tooth loss via periodontal disease. In fact, they were not associated with tooth loss in our previous study (Mihara et al., 2019). We believe that these variables are not major factors because we found no significant difference in smoking and diabetes between the case group and the control group after matching.…”

“…At the subject level, adjusting factors were age group and occlusal support status—factors that were associated with tooth loss in our previous study (Mihara et al., 2019). At the tooth level, adjusting factors were Kennedy classification, tooth position, tooth type, restoration status, dental caries, periodontal pocket depth, and the condition of the opposing tooth.…”

“…Periodontal disease and dental caries are thought to be the major causes of tooth loss (Aida et al., 2006; Nilsson et al, 2019). Additionally, our group has reported that occlusal support status is also associated with tooth loss (Mihara et al., 2019).…”

Effect of night dentures on tooth mobility in denture wearers with sleep bruxism: A pilot randomized controlled trial

“…Thus, the impact of ND placement on RPD wearers without reduced occlusal support remains unclear. In addition, whether the occlusal support remained at the premolar and/ or molar (B2 and B3) or not (B4) might be critical for an increase in abutment tooth mobility or loss [41]. In this study, subgroup analysis based on the remaining occlusal supports could not be conducted due to the small sample size.…”