Percentile Curves for Present Teeth in Smokers and Non-smokers in an Adult Male Population

Oral health instruction for adults should take into account the potential effect of tooth loss, as this has been suggested to predict further tooth loss. Therefore, the purpose of this study was to determine whether further tooth loss could be predicted from the number of present teeth (PT). We employed the same method as in our previous study, this time using two national surveys of dental disease, which were deemed to represent a generational cohort. Percentiles were estimated using the cumulative frequency distribution of PT from the two surveys. The first was a survey of 704 participants aged 50-59 years conducted in 2005, and the second was a survey of 747 participants aged 56-65 years conducted in 2011. The 1st to 100th percentiles of the number of PT were calculated for both age groups. Using these percentiles and a generational cohort analysis based on the two surveys, the number of teeth lost per year could be calculated. The distribution of number of teeth lost generated a convex curve. Peak tooth loss occurred at around 12-14 PT, with 0.54 teeth being lost per year. The percentage of teeth lost (per number of PT) increased as number of PT decreased. The results confirmed that tooth loss promotes further tooth loss. These data should be made available for use in adult oral health education.

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“…The percentile values were calculated in accordance with Osada's method 14,21) and our previous study 22) .…”

Section: Determining Percentile Valuesmentioning

confidence: 99%

Estimated Tooth Loss Based on Number of Present Teeth in Japanese Adults Using National Surveys of Dental Disease

Yoshino

Ishizuka

Fukai³

et al. 2015

Bull. Tokyo Dent. Coll.

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“…The same results were also obtained by Worthington et al 61) and Burt et al 8) . The percentile curve for PT in adults in employment indicated that the number of PT decreased rapidly, bordering on 24-25 PT 63) . This was why 24 was set as the cutoff point for the number of PT in the present study.…”

Section: Discussionmentioning

confidence: 98%

“…Many reports have indicated smoking as a risk factor for tooth loss 3,4,22,24,28,32,38,46,63) . the number of PT being <19 according to smoking status was 2.22 (males) and 2.14 (females) among current smokers 24) .…”

Section: Discussionmentioning

confidence: 99%

Factors Associated with Number of Present Teeth in Adults in Japanese Urban City

Kurahashi

Kitagawa

Mutoh

2017

Bull. Tokyo Dent. Coll.

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The purpose of this study was to identify which factors were associated with number of present teeth (PT) in older adults as their clarification might contribute to maintaining the number of PT in this population. These factors were investigated by means of a questionnaire on oral health condition, general health behavior, and anamnesis of diabetes mellitus together with a dental examination. Data were obtained from a total of 7,741 Japanese subjects (2,623 males and 5,118 females), all of whom were aged 40, 50, or 60 years. Significant differences were observed in the mean number of PT between a positive or negative response to questions on anamnesis of diabetes mellitus, current smoking, and having loose teeth in all age groups in males; significant differences were also observed for current smoking, lower intake of dairy milk products, having loose teeth, no experience of tooth brushing instruction, and poor oral hygiene status in all age groups in females. Stepwise logistic regression analysis revealed having loose teeth (odds ratio [OR], 1.82), gingival swelling (OR, 1.40), an anamnesis of diabetes mellitus (OR, 1.72), current smoking (OR, 1.86), lower intake of dairy milk products (OR, 1.22), preference for salty seasonings (OR, 1.23), frequent sweet intake (OR, 1.29), no experience of tooth brushing instruction (OR, 1.38), and poor oral hygiene (OR, 2.04) as significant risk factors for the number of PT being <24 after adjusting for age and sex. These results indicate that an anamnesis of diabetes mellitus, a history of smoking, the presence of loose teeth, and poor oral hygiene status in a self-reported evaluation of oral health might correlate with <24 PT in older adults.

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“…Participants were divided into 13 age groups, in 5-year increments. Percentile values of each group were calculated in accordance with methods used in previous studies 13,14,19,20) (Table 1).…”

Section: Calculation Of Percentile Valuesmentioning

confidence: 99%

“…Yoshino et al 19) introduced percentile curves of present and sound teeth for use in providing oral health instruction to office workers. Yoshino et al 20) also proposed percentile curves of PT in smokers and non-smokers. The percentile curves for PT were not only useful indicators in assessing the population, but may also be used in oral health instruction for office workers.…”

Section: Introductionmentioning

confidence: 99%

Estimated Percentile Curves of Occluding Pairs in an Adult Population

Yoshino

Ishizuka

Watanabe

et al. 2013

Bull. Tokyo Dent. Coll.

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The purpose of this study was to provide the estimated percentile curves of occlusal pairs (OPs) in adults for use in oral health instruction. Data on number of present teeth (PT) were obtained from the National Report on the Survey of Dental Disease in 2005. Data from 1,535 males and 2,248 females, ranging in age from 18 to 82, were analysed. The mean number of OPs were used from our previous report. In that report we can be estimated OPs from the number of PT. In this study, PT data were replaced by the mean number of OPs. Estimated percentile curves in males, the 10th percentile of OPs was 13.7 at 60 years of age and 12.5 at 70. The 50th percentile of OPs was 12.2 at 50 years of age, 11.2 at 60 and 5.4 at 70. The 90th percentile of OPs was 7.6 at 50 years of age, 2.1 at 60 and 0 at 70. There appeared to be a cut off point after 10 OPs where the 50th to 97th percentile curves of OPs dropped off rapidly. In females, the 10th percentile of OPs was 13.4 at 60 years of age and 12.7 at 70. The 50th percentile of OPs was 11.5 at 50 years of age, 10.2 at 60 and 6.2 at 70. The 90th percentile of OPs was 7.1 at 50 years of age, 2.4 at 60 and 0 at 70. In females again the percentile curves dropped off after 10 OPs. Our results suggest that the loss of OPs may be accelerated when the number of OPs drops below 10. This means that patients need at least 10 OPs in order to maintain a stable oral status. The estimated percentile curves given in this study should be made available for use in adult oral health education.

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Percentile Curves for Present Teeth in Smokers and Non-smokers in an Adult Male Population

Cited by 4 publications

References 21 publications

Estimated Tooth Loss Based on Number of Present Teeth in Japanese Adults Using National Surveys of Dental Disease

Estimated Tooth Loss Based on Number of Present Teeth in Japanese Adults Using National Surveys of Dental Disease

Factors Associated with Number of Present Teeth in Adults in Japanese Urban City

Estimated Percentile Curves of Occluding Pairs in an Adult Population

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