A 9-year longitudinal study of reported oral problems and dental and periodontal status in 70- and 79-year-old city cohorts in northern Sweden

Outcomes of resin-bonded attachments for removable dental prostheses

PURPOSE

This clinical study aimed to evaluate the outcomes of resin-bonded attachments (RBAs) for precision-retained removable dental prostheses (RDPs) after at least two years of clinical maintenance.

METHODS

Since December 1998, 205 RBAs (44 bonded to posterior teeth, 161 to anterior teeth) have been inserted in 123 patients (62 females and 61 males; mean age, 63.6 ± 9.6 years) who were recalled annually. The abutment teeth underwent a minimally invasive preparation limited to the enamel. RBAs were cast in a cobalt-chromium alloy with a minimum thickness of 0.5 mm and adhesively luted with a luting composite resin (Panavia 21 Ex or Panavia V5, Kuraray, Japan). We evaluated caries activity, plaque index, periodontal condition, and tooth vitality. The Kaplan-Meier survival curves were used to account for the reasons for failure.

RESULTS

The mean observation time of RBAs until the last recall visit was 84.5 ± 51.3 months (range, 3.6-270.6). During the observation period, 33 RBAs debonded in 27 patients (16.1%). The 10-year success rate according to the Kaplan-Meier analysis was 58.4%, which dropped to 46.2% after 15 years of observation if debonding was considered a failure. If rebonded RBAs were regarded as surviving, the 10- and 15-year survival rates would be 68.3% and 61%, respectively.

CONCLUSIONS

The use of RBAs for precision-retained RDPs appears to be a promising alternative to conventionally retained RDPs. As reported in the literature, the survival rate and frequency of complications were comparable with those of conventional crown-retained attachments for RDPs.

Prevalence and incidence of dental caries and related risk factors in 70- to 76-year-olds

OBJECTIVE

The prevalence of caries and various risk factors was studied cross-sectionally in two cohorts of 72-year-olds over the course of 20 years. Incidence was also studied over a period of 6 years.

MATERIAL AND METHODS

Samples of two dentate subjects from cohorts of 70 to 72-year-olds were included; cohort III (n=135), born 1911-12, and cohort VI (n=139), born 1930. Cohort III was also examined at 70 years of age and re-examined after 6 years. An interview and clinical examination, including DMFS, plaque and gingival bleeding indices, pocket depth, and secretion rate for stimulated whole saliva, were carried out.

RESULTS

The mean numbers of teeth in cohorts III and VI were 14 and 21, respectively. On average, 2.1 tooth surfaces were decayed (DS) in cohort III compared with 1.3 in cohort VI (p<0.05). 49% of the individuals in cohort III did not develop any new DS, while 19% developed ≥3 DS during the 6-year follow-up period. The prevalence of caries was related to plaque and gingival bleeding indices, as well as a pocket depth of ≥4 mm, at ages 70 and 72. Moreover, the incidence of caries was related to the same factors.

CONCLUSIONS

The numbers of remaining teeth increased and the prevalence of caries decreased over the 20-year period. The incidence of caries over the follow-up period of 6 years was moderate. The results indicate that the prevalence of plaque, gingival bleeding, and a pocket depth of ≥4 mm are predictive factors for both prevalence and incidence of caries.

Dietary antioxidants and periodontal disease in community-based older Japanese: a 2-year follow-up study

OBJECTIVE

To investigate the longitudinal relationship between the intake of dietary antioxidants and periodontal disease in community-dwelling older Japanese.

DESIGN

A retrospective cohort study, with a follow-up of 2 years (2003-2005). Intakes of dietary antioxidants (vitamin C, vitamin E, α-carotene and β-carotene) were assessed with a validated FFQ. Participants were classified by tertile of antioxidant intake. Full-mouth periodontal status, measured as the clinical attachment level, was recorded at baseline and follow-up examinations. Periodontal disease progression was considered as loss of attachment of 3 mm or greater over the study period at the interproximal site for each tooth. Finally, the number of teeth with periodontal disease progression per person was calculated and was used as the outcome. Poisson regression analysis was conducted, with dietary antioxidants as the main exposure, to estimate their influence on the number of teeth with periodontal disease progression.

SETTING

Niigata City (Japan).

SUBJECTS

Dentate individuals aged 75 years in 2003, for whom data were available, were included in the analyses (n 264).

RESULTS

A higher intake of dietary antioxidants was inversely associated with the number of teeth with periodontal disease progression, controlling for other variables. The multivariate-adjusted incidence rate ratios in the first, second and third tertiles were 1·00, 0·76 (95 % CI 0·60, 0·97) and 0·72 (95 % CI 0·56, 0·93) for vitamin C; 1·00, 0·79 (95 % CI 0·62, 0·99) and 0·55 (95 % CI 0·42, 0·72), for vitamin E; and 1·00, 1·02 (95 % CI 0·81, 1·29) and 0·73 (95 % CI 0·56, 0·95) for β-carotene.

CONCLUSIONS

The study results suggest that higher intake of antioxidants may mitigate periodontal disease in community-dwelling older Japanese.

Association between tooth loss and bone mineral density in Brazilian postmenopausal women

Background

To evaluate oral health in postmenopausal women and verify whether there is a correlation between tooth loss according to index of decayed, missing, filled teeth (DMFT) and bone mineral density (BMD).

Methods

A cross-sectional study was conducted with 100 women. The DMFT and its associations with lumbar and femoral BMD (T-score and g/cm²) were assessed. Analysis of covariance and multiple logistic regression were applied and the mean and standard deviation, absolute and relative frequencies (percentages) were obtained.

Results

The analysis of covariance (ANCOVA) revealed significant association between the DMFT index and bone mass (T-score), compared to the young adult in L2-L4 (P = 0.0252) and in bone mass in L2-L4 (below average) in g/cm² and in the DMFT index (P = 0.0332), and for women with bone mass below the average index DMFT was higher. Between L2-L4 below average (g/cm²) and extracted component (P = 0.0483) association was also significant because women with bone mass below the average had a greater extracted component.

Conclusions

Postmenopausal women with poor oral health may present reduced bone mass. There was significant association between BMD and DMFT at the L2-L4 site. Women must be advised that their good oral health, amount and quality of bone mass should also be matters of concern.

Keywords

Bone mineral density; Post-menopausal; Osteoporosis; Tooth loss

Clinical and community risk models of incident tooth loss in postmenopausal women from the Buffalo Osteo Perio Study

 

OBJECTIVE

While risk factors for tooth loss in adults have been identified, limited studies describing factors associated with incident tooth loss in postmenopausal women exist. This study assessed both clinical and non-clinical risk factors for incident tooth loss.

METHODS

Postmenopausal women (N = 1341) were recruited between 1997 and 2000 from 1847 eligible Observational Study participants of the Buffalo, NY center of the Women's Health Initiative who had complete dental examinations to assess alveolar bone height, soft tissue attachment and general oral health, and completed questionnaires concerning demographics, general health, lifestyle and oral health (72.6% participation rate). Five years later (2002-2005), 1021 women (76.1%) repeated these examinations and questionnaires. Incident tooth loss was determined by oral examination.

RESULTS

After an average 5.1 years of follow-up (SD, 0.38), a total of 323 teeth were lost in 293 women, resulting in 28.7% of women with incident loss of at least one tooth. In multivariable models, diabetes history, gum disease history, smoking, previous tooth loss, BMI and plaque index, baseline clinical measures including alveolar crestal height (ACH) (OR = 1.22 per mm loss, 95% CI 1.11, 1.35), clinical attachment loss (CAL) (OR = 1.13 per mm loss, 95% CI 1.05, 1.23), and pocket depth (PD) (OR = 1.26 per mm loss, 95% CI 1.13, 1.41) were significant risk factors of incident tooth loss. In a community model that included no clinical measures, diabetes history (OR = 2.45, 95% CI 1.26, 4.77), prior gum disease (OR = 1.97, 95% CI 1.43, 2.70), ever smoking (OR = 1.42, 95% CI 1.06, 1.89), number of teeth lost at baseline (OR = 1.05 per tooth, 95% CI 1.02, 1.08), and BMI (OR = 1.15 per 5 km/m(2) increase, 95% CI 1.01, 1.33) were associated with an increased risk of incident tooth loss.

CONCLUSIONS

Clinical and questionnaire-based models were found to provide similar risk estimates for incident tooth loss in postmenopausal women. These models identified high-risk postmenopausal women where preventive strategies may be targeted.

A systematic review of dental recall intervals and incidence of dental caries

BACKGROUND

Dental recall interval protocols are used to prevent dental disease through regular maintenance evaluations and preventive procedures. In this systematic review, the authors examined the evidence for the rationale behind a "one-recall-interval-fits-all" protocol, such as a six-month recall interval on caries incidence.

METHODS

The authors searched the PubMed database and reviewed titles, abstracts and full reports. They also searched the references of each full report and used the "Related articles" feature. They used a checklist validated for randomized and nonrandomized studies to conduct a quality assessment for each article.

RESULTS

The authors found seven articles representing six studies that met their inclusion criteria. The results of a randomized controlled trial showed no significant differences in oral health between patients recalled every 12 months and those recalled every 24 months. The investigators of one nonrandomized controlled trial reported that a two- to three-month recall interval significantly reduced the incidence and recurrence of caries. The investigators of an additional longitudinal non-randomized controlled study that compared three-, six- and 12-month recall intervals reported caries increments of 4.4, 4.0 and 4.9, respectively. The results of two retrospective studies showed that a specific recall interval did not alter caries incidence significantly. The results from a cross-sectional study suggested that a six-month recall interval was associated with more restored teeth but less active caries.

CONCLUSIONS

The authors conclude that the evidence for using a one-recall-interval-fits-all protocol to reduce caries incidence was weak. Studies that addressed the impact of recall interval on caries incidence were methodologically weak. The evidence was not strong enough to support using any specific one-recall-interval-fits-all protocol for all patients.

CLINICAL IMPLICATIONS

Using a one-recall-interval-fits-all protocol for caries prevention should be re-evaluated. On the basis of evidence from the randomized controlled trial, recall intervals could be extended to every two years. Evidence from the other studies revealed conflicting results for the efficacy of using any specific recall interval protocol. Because all of these studies had serious threats to validity, clinicians may wish to consider assigning recall intervals to patients on the basis of the patients' risk of developing caries. However, a discussion of a caries risk assessment is beyond the scope of this review.

What are the prevalence and incidence of tooth loss in the adult and elderly population in Europe?

OBJECTIVE

The purpose of this review was to study the prevalence and incidence of edentulism and tooth loss in European countries.

MATERIAL AND METHOD

A literature search was performed by means of Medline/PubMed using various combinations of keywords concerning prevalence and incidence of tooth loss and edentulism, complemented by a hand search. Inclusion criteria were cross-sectional and longitudinal clinical and questionnaire studies of representative or random samples of >/=100 subjects at the initial examination. Sixty articles were identified; the hand search gave 13 more references.

RESULTS

This literature review demonstrated that there is a lack of epidemiological studies on edentulism and tooth loss in many countries in Europe. The quality of available data varied considerably. There is a documented decline of edentulism with still great differences in prevalence between countries, between geographical regions within countries and between groups with various backgrounds. The mean number of lost teeth increases with age. In several countries many dentate subjects aged 60 years and over still have reduced dentitions possibly needing prosthodontic treatment. The incidence of tooth loss is low but with geographical variation between age groups, and there is a trend for decreasing incidence over the last decades. A great number of variables are associated with tooth loss, and there is no consensus whether dental disease related or socio-behavioural factors are the most important risk factors. Institutionalised elderly people have, in general, more compromised oral health, including fewer teeth, than those at the same age living freely.

CONCLUSION

Tooth loss and edentulism are declining at least in those European countries where reliable data are available. However, the WHO goal of retaining at least 20 teeth at the age of 80 years has not yet been met but is being approached in some countries.

Sucrose substitutes and their role in caries prevention

Many non- or low-cariogenic sucrose substitutes are currently available and are found as ingredients of a variety of candy, chewing gum, and drinks. Recently the role of sugar alcohols in promoting remineralisation of enamel has attracted much attention. Thus, the dental profession needs to understand the general characteristics and features of sugar substitutes to provide advice on oral health to patients as well as the general public. There are two critical requirements for sucrose substitutes, namely, being nutritionally appropriate and not being detrimental to the overall general health of the individual. The use of a greater variety of confectionary containing sucrose substitutes and the development of new substitutes with high nutritional value are essential in the battle against caries. In this paper we review in detail the characteristics of sucrose substitutes currently in use, their role in caries prevention and promotion of oral health.

Periodontal disease and the incidence of tooth loss in postmenopausal women

BACKGROUND

The role of periodontal disease as a predictor of incident tooth loss in postmenopausal women has not been determined. The aim of this cohort study was to determine the extent of the association between baseline periodontal status and incident tooth loss in a population of postmenopausal women.

METHODS

The study population included 106 dentate white postmenopausal women who participated in a cross-sectional study between 1989 and 1991 who were willing and eligible to have a repeat examination after 10 to 13 years. At baseline, full-mouth assessment of periodontal status was performed clinically and radiographically. Assessment of tooth loss during follow- up was assessed clinically by a periodontist. Odds ratio (OR) and its 95% confidence interval (CI) for each periodontal variable was obtained from separate multiple logistic regression analyses adjusting for the effect of age, household income, smoking, hormone therapy, snack consumption, and number of decayed teeth.

RESULTS

Sixty-one (57.5%) subjects lost at least one tooth during follow-up. Mean tooth loss per person was 1.81 +/- 2.77. After adjusting for confounders, each millimeter of alveolar bone loss at baseline increased the risk of tooth loss 3-fold (OR = 3.26; 95% CI: 1.60 to 6.64). The risk of tooth loss also increased 2.5 times for each millimeter of clinical attachment loss (OR = 2.50; 95% CI: 1.24 to 5.07). Probing depth (OR = 2.53; 95% CI: 0.98 to 6.53), gingival bleeding (OR = 1.99; 95% CI: 0.21 to 18.94), calculus (OR = 2.05; 95% CI: 0.91 to 4.61), and plaque (OR = 0.70; 95% CI: 0.13 to 3.34) were not significantly associated with incident tooth loss.

CONCLUSION

Periodontal disease, especially measured by alveolar bone loss, is a strong and independent predictor for incident tooth loss in postmenopausal women.

Relationship of number of remaining teeth to health-related quality of life in community-dwelling elderly

OBJECTIVE

The aim of this study was to evaluate the relationship between number of remaining teeth and health-related quality of life in community-dwelling elderly.

SUBJECTS

A total of 207 participants who were community-dwelling, 85 years of age. Data were from a population-based study of age-related general and oral health in Fukuoka Prefecture, Japan.

MEASUREMENTS

The Japanese version of the Short Form 36 Health Survey (SF-36).

RESULTS

The mental component score for the participants, from the SF-36, was higher than the Japanese national norm for those aged > or = 70 years. There were no significant differences in the mean of any scores on the SF-36 by having spouse, living with family, or education level. The mean of the SF-36 scores of physical functioning (PF) and of the physical component scores were significantly higher in the 85-year-old participants with > or = 20 teeth than in those with < or = 19 teeth (p < 0.05 and p < 0.01 respectively). In addition, a significant difference (p < 0.05) was observed between the mean of participants with > or = 20 teeth and those with < or = 19 teeth after adjustment for region where the participant lived, activities of daily living (ADL), and sex. The PF (p < 0.001), role-physical (p < 0.005), bodily pain (p < 0.001), vitality (p < 0.001), social functioning (p < 0.05), and physical component (p < 0.001) scores were significantly higher in participants with a good activities of daily living (ADL) assessment. However, ADL was not associated with the number of teeth.

CONCLUSIONS

The findings of the present study indicated that 85-year-old participants with > or = 20 teeth had better subjective physical health than those with < or = 19 teeth.

Changes in dental status over 10 years in 80-year-old people: a prospective cohort study

OBJECTIVES

The aim of the present study was to follow-up the condition of the teeth over a sufficiently long period.

METHODS

Dental examinations were a part of a multidisciplinary 10-year cohort study on the elderly. These examinations were made in 1990 (n = 226), 1995 (n = 90) and 2000 (n = 65) for the entire population born in 1910 and living in Jyväskylä, Finland. The subjects were divided into two categories, dentate (one tooth or more) and edentulous.

RESULTS

The results showed that men had more intact teeth and lower DMF scores than women, but the differences diminished during the follow-up period. The number of remaining and filled teeth of those women who took part in all three phases of the present study was higher than that of those who died during the follow-up. In men the DMF scores showed the opposite trend. The most significant deterioration during the 10-year follow-up was found in the number of teeth and DMF scores in men and in the number of remaining and filled teeth in women.

CONCLUSION

Among men, in particular, significant changes in oral health status could be seen even between 80 and 90 years of age. Hence, regardless of advanced age, a subject should be motivated by the oral health care team to seek regular dental treatment.

The effectiveness of routine dental checks: a systematic review of the evidence base

AIMS

To systematically review the effectiveness of routine dental checks of different recall frequencies in adults and children.

METHODS

Search methods included electronic bibliographic databases up to March 2001, relevant internet sites, citation checking and contact with experts and professional dental bodies.

INCLUSION CRITERIA

(1) STUDY DESIGN: any; (2) POPULATION: deciduous, mixed and permanent dentition; (3) INTERVENTION: 'Routine dental check': 'clinical examination, advice, charting (including monitoring of periodontal status) and report' as defined in the NHS Executive General Dental Service Statement of Dental Remuneration; (4) Comparator: no routine dental check or routine dental check(s) of different recall frequency; (5) PRIMARY OUTCOMES: caries, periodontal disease, quality of life, oral cancer.

RESULTS

Twenty eight studies were identified for the review. Studies were poorly reported and clinically heterogenous which restricted comparison between studies and limited generalisability to the UK situation. There was no consistency across multiple studies in the direction of effect of different dental check frequencies on measures of caries in deciduous mixed or permanent dentition, periodontal disease or oral cancer in permanent dentition. No studies were identified linking empirical measures of quality of life associated with oral health and dental check frequency.

CONCLUSIONS

There is no existing high quality evidence to support or refute the practice of encouraging six-monthly dental checks in adults and children.

Oral status, cognitive and functional capacity versus oral treatment need in nursing home residents: a comparison between assessments by dental and ward staff

OBJECTIVES

The aim of this study was to study the relationships between cognitive and functional capacity versus oral health and treatment need and to compare oral status assessments and oral treatment need, assessed by nurses and dental professionals, respectively.

DESIGN

Cross-sectional survey.

SETTING

Nursing home.

SUBJECTS

One hundred and ninety-two nursing home residents were examined in 1997.

MAIN OUTCOME MEASURES

Cognitive and functional capacity in different groups of residents regarding oral health and treatment need, measured by a comprehensive assessment with the Resident Assessment Instrument (RAI) and dental status in a separate examination protocol, recorded by a dentist.

RESULTS

There was a significant correlation between being dentate and having need of oral treatment. Those who were able to chew also had significantly better cognitive and functional capacity. Oral treatment need was identified most often by the dentist, intermediately by the RAI assessment and least frequently by the residents themselves.

CONCLUSIONS

Being dentate and having a loss of cognitive and functional capacity is predictive of oral treatment need among nursing home residents. Enhanced interaction between nurses and dental professionals needs to be promoted for better awareness of preventive measures and better regular oral care for frail and dependent elderly persons.

Aspectos epidemiológicos da saúde bucal do idoso no Brasil

Com o objetivo de analisar os estudos epidemiológicos sobre a saúde bucal dos idosos no Brasil, foram pesquisados todos os artigos indexados nas bases de dados BBO, LILACS e MEDLINE, a partir de 1988, data da publicação do Levantamento Epidemiológico Nacional. Foram encontrados 29 artigos, dos quais sete estudos foram analisados quanto à metodologia utilizada (faixa etária, tipo de amostra, forma de apresentação dos dados) e quanto aos resultados apresentados (índice CPOD, participação de dentes extraídos, percentual de edêntulos, e uso e necessidade de prótese). O CPOD encontrado variou de 26,8 a 31,0, sendo que o componente extraído representou cerca de 84% desse índice. A prevalência do edentulismo ficou em 68%. Somente 3,9%, um pequeno percentual dos idosos, não necessitam nem usam qualquer tipo de prótese, e o uso da prótese total é mais freqüente no arco superior do que no inferior. A falta de padronização na organização e apresentação dos dados, assim como a sua escassez, prejudicaram a análise, sugerindo que deva haver uma maior preocupação por parte dos pesquisadores quanto à realização de novas pesquisas, e principalmente, quanto à maneira como estas serão conduzidas. Apesar disso, confirmaram-se as condições muito precárias de saúde bucal em idosos no Brasil.

Tooth loss in the very old: 13-15-year incidence among elderly Iowans

OBJECTIVES

Very few studies have reported tooth loss incidence over a period of 10 years or more, and fewer have reported tooth loss occurrence in subjects aged 80 and older, so that the long-term pattern of tooth loss in the very old is largely unknown. This study assessed 13-15-year tooth loss incidence among a cohort of Iowans, aged 65 and older at baseline.

METHODS

Oral examinations were conducted on 520 subjects beginning in 1983, and periodically until 1988, with another round of examinations conducted on surviving members of the initial cohort during 1996-98.

RESULTS

Of the 73 remaining subjects, 45 subjects lost a total of 153 teeth during the period (mean=2.1 teeth lost), with a maximum of 17 teeth lost. Molars were the most commonly lost teeth, while canines and maxillary incisors were the least commonly lost. Bivariate analyses found that tooth loss was associated with untreated decay at baseline and level of periodontal attachment loss at earlier examinations. Logistic regression identified only greater severity of attachment loss as a significant risk factor for tooth loss (Adjusted odds ratio=2.4, P=0.006). The impact of tooth loss on subjects' lives was assessed using OHIP and other questions. The occurrence of tooth loss over the study period had little impact, but the number of remaining teeth significantly impacted subjects' ability to eat or chew food, swallow, or their willingness to smile.

CONCLUSIONS

These results suggest that tooth loss continues in the very old, that periodontal attachment loss is associated with tooth loss in this age group, and that loss of teeth over one's lifetime does affect certain quality-of-life measures.

Nutritional status and chewing capacity in nursing home residents

Chronically ill elderly persons sustain a high risk for protein-energy malnutrition (PEM). In this study we explored some of the complex associations between nutritional status, dental health and cognitive and physical function in 192 nursing home residents (mean age 84+/-8 years, 80% female). Nutrition-related data from the Resident Assessment Instrument (RAI) were compiled into a Nutrition Score (NuSc; 0-1 = non-PEM, 2 = risk for PEM, and 3-7 = PEM). Chewing capacity, according to number and condition of occlusal contacts, was determined by a Clinical Dental Functionality score (CDF). The Cognitive Performance Scale (CPS) and activities of daily living (ADL) were determined according to the RAI. Fifty percent of the residents had NuSc > or = 2, and 25% had NuSc > or = 3. One third did not have the dental prerequisites for chewing. i.e., < 4 occlusal contacts. Almost half of the residents had severe cognitive dysfunction, and over two thirds were severely limited in their ADL activities. Subjects with > or = 4 occlusal contacts, i.e., technical chewing capacity, had better NuSc (1.5+/-1.4) than those not able to chew (2.4+/-1.6, p=0.0005). In univariate logistic regression, the odds for NuSc > or = 2 increased with reduced ADL functions. inability to chew and poor cognition. In multivariate logistic regression, ADL and chewing capacity were significantly related to NuSc > or = 2. When NuSc > or = 3 was chosen as cut-off, only ADL was related to malnutrition. In conclusion, half of this group of nursing home residents appeared to be malnourished, or were at risk for PEM. Reduced physical function was the strongest predictor of PEM, while impaired chewing capacity was associated with risk for PEM.

The trend and risk factors of perceived toothache among Finnish adolescents from 1977 to 1997

Toothache is a subjective oral health indicator that should become uncommon when oral health is improving. The aim of this study was to assess changes in perceived toothache between 1977 and 1997 among Finnish adolescents. In the Adolescent Health and Lifestyle Survey, a self-administered questionnaire was mailed to a representative sample of 12-, 14-, 16-, and 18-year-old Finns every second year. The sample sizes in the surveys varied from 2422 to 11,105, making a total of 35,349 subjects in the entire study. The incidence of toothache during the previous 2 years was requested in 1977, 1985, 1991, 1995, and 1997, and the prevalences were 31%, 25%, 28%, 29%, and 37%, respectively. The increase between 1995 and 1997 was highest among 16- and 18-year-olds. There was no tendency for perceived toothache to decline over the study period, despite the decrease in caries experience. Toothache varied by age, socioeconomic status (SES), place of residence, and toothbrushing frequency. The increase in the incidence of toothache reported after 1995 could be a warning signal that economic recession in Finland has caused changes in the dental care system.

The relevance of behavioural sciences in dental practice

The aim of this paper is to illustrate how knowledge from behavioural sciences is necessary and relevant in creating a successful dental practice, benefitting patients and dental professionals. There are many ways to create a successful dental practice, the products of which are the various treatments performed by dentists or dental hygienists for their patients. Advanced technologies and methods are constantly improving these treatments and thus the technical and managerial aspects of dentistry. However, the success of dental practice is not only dependent on the technique applied or the technical skills of dental professionals, but also on patients, their attitudes and behaviour and the interaction between dental professionals and patients. It is well known that the success of dental treatments (for example, periodontal, orthodontic or implants) depends on the patient's behaviour, which includes compliance with certain oral hygiene regimens or specific dental visiting patterns. The outcome of the treatment depends on both the dental professional's knowledge and skills and the patient's skills, objectives and expectations. Furthermore, dental professionals and patients should be satisfied with the treatment plan as well as the outcome. This paper argues that in order for this to happen dental professionals need additional knowledge and skills from fields outside traditional dental sciences. In order to treat patients successfully, dental professionals must understand and change or modify patient behaviour, and the knowledge necessary for this is provided by the behavioural sciences.

Number of teeth and risk of root caries

OBJECTIVE

This study aimed to investigate the association between number of natural teeth and prevalence of root caries.

DESIGN

A cross-sectional design was adopted. A stratified multi-stage purposive sampling method was used to select a wide range of elderly people from all social classes, educational levels and sexes. Data was collected through interviews and clinical examinations.

SETTING

Urban area in Chiang Mai-Thailand.

PARTICIPANTS

549 elderly dentate aged 60-74 years.

MAIN OUTCOME MEASURES

Teeth with decay and filled roots (DF-T).

RESULTS

The prevalence of root caries was 18.2% with a mean DF-T of 0.58 (S.D. 2.02). Results of multiple logistic regression showed that number of teeth, DMF-S scores, sex, and socio economic factors were statistically significantly associated with root caries (P < 0.05). Adjusted odds ratios demonstrated a 14% increase in the chance of having root caries when the number of teeth increased one unit. Similarly, a 3% increase was observed for each unit increase in the DMF-S scores (p < 0.001). Being male, having more than four years of education and earning more than 1500 baht/month increased the chances of root caries by 76%, 139% and 85% respectively (p < 0.001). Recession and age were not statistically significantly associated with root caries.

CONCLUSIONS

Having more teeth, higher DMF-S scores, earning more than 1500 baht/month, having more than 4 years of education and being male increased the likelihood of having root caries.