Melbourne Dental School - Research Publications

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    Education/Training Interventions to Improve Oral Health of Adults with Intellectual Disability.
    Kangutkar, T ; Calache, H ; Watson, J ; Taylor, S ; Balandin, S (MDPI AG, 2022-10-17)
    People with intellectual disability have poorer oral health outcomes and experience greater difficulties accessing dental services than the rest of the community. Interdisciplinary educational programs for those involved in oral health decision making for people with intellectual disability aim to improve their oral health. This scoping review explored education/training interventions related to the oral health of adults with intellectual disability. Interventions targeted dental health and non-dental health professionals, adults with intellectual disability, and their paid and unpaid supporters. Six electronic databases were searched using PRISMA guidelines and the Crowes critical appraisal tool. The search strategy, plus the application of the inclusion and exclusion criteria, presented in the body of the manuscript, led to the selection of 20 papers for inclusion into this review. The quality of undergraduate tuition relating to disability was reported to be poor, but students and dental health professionals expressed interest in expanding their knowledge in this area. Disability-support workers and primary carers of people with intellectual disability reported improved knowledge and attitude, but the oral health status of the people they supported was not impacted. No research was found that explored the perspectives of non-dental health professionals. Oral health training/education contributes to systemic barriers in general health, wellbeing, and social inclusion of people with intellectual disability. Revision of disability-related programs in general dentistry courses and longitudinal impact research is needed.
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    How does the dental benefits act encourage Australian families to seek and utilise oral health services?
    Bastani, P ; Izadi, R ; Manchery, N ; Ha, D ; Calache, H ; George, A ; Do, L ; Zhu, R (Public Library of Science (PLoS), 2022)
    BACKGROUND: This study aimed to analyse the content of the Dental Benefits Act 2008 as a foundation for the Child Dental Benefits Schedule (CDBS) to determine how the Act encourages Australian families to seek and utilise oral health services. METHODS: This was a qualitative narrative document analysis conducted in 2022. Data was collected by searching formal websites for retrieving documents that reported the Australian Dental Benefits Act. The eligibility of the retrieved documents was assessed based on authenticity, credibility, representativeness, and meaningfulness of the data. A seven-steps procedure was applied for framework analysis. RESULTS: The content of the Dental Benefits Act 2008 provides directions on the three categories of operational, collective, and constitutional rules. Operational rules at the level of oral health providers and the population, as the service end users, can be demonstrated as rules in use in a mutual interaction with the collective and constitutional rules. The consequence of governing the rules at the community level can easily define how the oral health services are provided and utilised. The response is sent to the government level for better regulation of oral health service delivery and utilisation. Then, with interaction and advocacy with the diverse range of stakeholders and interdisciplinary partnerships, with community groups, non-government sectors and councils, the rules can be transformed, adopted, monitored, and enforced. Another mechanism of response has occurred at the providers' and users' level and to the operational rules to community groups and stakeholders via advertising and promoting the utilisation and provision of oral health services. CONCLUSION: This study integrates the perspective of politicians with those of policy makers to reconsider the role and significance of the rules based on the triple collaborations among oral health users and oral service providers, the community, and the stakeholders as well as the government. A comprehensive attention is still needed in future revisions of the Dental Benefits Act 2008 according to the contextual factors, socioeconomic and geographical attributes of the population for better implementation of de facto rules and more effective outcomes of the interventions. It is recommended that further research be undertaken utilising a mix-method approach for a holistic view prior to further revisions of the Act or proposal of probable upcoming schemes.
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    Economic Evaluations of Preventive Interventions for Dental Caries and Periodontitis: A Systematic Review
    Tan, MN ; Tonmukayakul, U ; Le, LK-D ; Calache, H ; Mihalopoulos, C (SPRINGER INT PUBL AG, 2023-01)
    OBJECTIVES: To critically examine the methods used for full economic evaluations of preventive interventions for dental caries and periodontitis. METHODS: Published literature post-2000 was searched to April 2021. Based on a developed intervention classification framework for dental caries and periodontitis, only universal, selective or indicated interventions were included in this review. The Drummond 10-point checklist was used for quality appraisal. RESULTS: Of 3,007 unique records screened for relevance, 73 studies were reviewed. Most model-based studies (61/73) used cost-effectiveness analysis (49%) or cost-benefit analysis (28%). Trial-based studies (16/73) commonly used cost-effectiveness analysis (59%). Four studies used both economic evaluation methods. Sixty-four papers (88%) were on dental caries, eight papers (11%) focused on periodontitis, and one paper (1%) included both oral diseases; 72% of model-based and 82% of trial-based studies were of good quality. The most frequently investigated dental caries preventive interventions were water fluoridation (universal intervention; cost-saving or cost-effective), fissure sealant and fluoride varnish (selective and indicated interventions; cost-effectiveness outcomes were inconsistent). Supportive periodontal therapy with oral health education (indicated intervention; cost-effective) was the most frequently evaluated preventive intervention for periodontitis. Thirty percent of studies with a time horizon > 1 year did not apply an appropriate discount rate and 26% did not comprehensively discuss other important considerations beyond the technical analysis. CONCLUSIONS: Generic health outcome measures should be incorporated for economic evaluations on preventive interventions for dental caries and periodontitis, and an increased focus to prevent periodontitis using economic evaluation methods is needed to inform resource allocation and policy decision-making.
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    Developing and pilot testing an oral health screening tool for diabetes care providers
    George, A ; Poudel, P ; Kong, A ; Villarosa, A ; Calache, H ; Arora, A ; Griffiths, R ; Wong, VW ; Gussy, M ; Martin, RE ; Lau, P (BMC, 2022-08-11)
    BACKGROUND: People with poorly managed diabetes are at greater risk of periodontal disease. Periodontal disease that is not effectively managed can affect glycaemic levels. Diabetes care providers, including general practitioners and diabetes educators, are encouraged to promote oral health of their clients. However, valid and reliable oral health screening tools that assess the risk of poor oral health, that are easy to administer among non-dental professionals, currently do not exist. Existing screening tools are difficult to incorporate into routine diabetes consultations due to their length. Thus, this study aimed to develop and pilot a short oral health screening tool that would identify risk of existing oral diseases and encourage appropriate referrals to the dental service. METHODS: A three-item screening tool was developed after a comprehensive review of the literature and consensus from an expert panel. The tool was then piloted as part of a larger cross-sectional survey of 260 adults with diabetes who were accessing public diabetes clinics at two locations in Sydney, Australia. As part of the survey, participants completed the three-item screening tool and a 14-item validated tool, the Oral Health Impact Profile (OHIP-14), which has been used previously in the preliminary validation of screening tools. Sensitivity and specificity analyses were then undertaken comparing the results of the two tools. RESULTS: A statistically significant correlation was found between the shorter screening tool and the OHIP-14 (rho = 0.453, p < 0.001), indicating adequate validity. The three-item tool had high sensitivity (90.5%, 95% CI 84.9%, 94.7%), with a specificity of 46.3% (95% CI 37.7%, 55.2%). The negative predictive value was 81.4% (95% CI 71.3, 89.3). No single item performed as well regarding sensitivity and negative predictive value when compared to the three items collectively. CONCLUSIONS: The three-item screening tool developed was found to be valid and sensitive in identifying risk of poor oral health, requiring oral health referrals, among people with diabetes in this pilot. This is a simple, accessible tool that diabetes care providers could incorporate into their routine consultations. Further validation against comprehensive dental assessments is needed to reassess the tool's specificity and sensitivity in diverse settings.
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    Breastmilk influences development and composition of the oral microbiome
    Butler, CA ; Adams, GG ; Blum, J ; Byrne, SJ ; Carpenter, L ; Gussy, MG ; Calache, H ; Catmull, D ; Reynolds, EC ; Dashper, SG (TAYLOR & FRANCIS LTD, 2022-12-31)
    BACKGROUND: Human microbiomes assemble in an ordered, reproducible manner yet there is limited information about early colonisation and development of bacterial communities that constitute the oral microbiome. AIM: The aim of this study was to determine the effect of exposure to breastmilk on assembly of the infant oral microbiome during the first 20 months of life. METHODS: The oral microbiomes of 39 infants, 13 who were never breastfed and 26 who were breastfed for more than 10 months, from the longitudinal VicGeneration birth cohort study, were determined at four ages. In total, 519 bacterial taxa were identified and quantified in saliva by sequencing the V4 region of the bacterial 16S rRNA genes. RESULTS: There were significant differences in the development of the oral microbiomes of never breastfed and breastfed infants. Bacterial diversity was significantly higher in never breastfed infants at 2 months, due largely to an increased abundance of Veillonella and species from the Bacteroidetes phylum compared with breastfed infants. CONCLUSION: These differences likely reflect breastmilk playing a prebiotic role in selection of early-colonising, health-associated oral bacteria, such as the Streptococcus mitis group. The microbiomes of both groups became more heterogenous following the introduction of solid foods.
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    Diabetes and Oral Health (DiabOH): The Perspectives of Primary Healthcare Providers in the Management of Diabetes and Periodontitis in China and Comparison with Those in Australia
    Yun, A ; Luo, Y ; Calache, H ; Wang, Y ; Darby, I ; Lau, P (MDPI, 2022-06)
    Diabetes and periodontal disease are highly prevalent conditions around the world with a bilateral causative relationship. Research suggests that interprofessional collaboration can improve care delivery and treatment outcomes. However, there continues to be little interprofessional management of these diseases. DiabOH research aims to develop an interprofessional diabetes and oral health care model for primary health care that would be globally applicable. Community medical practitioners (CMPs), community health nurses (CNs), and dentists in Shanghai were recruited to participate in online quantitative surveys. Response data of 76 CMPs, CNs, and dentists was analysed for descriptive statistics and compared with Australian data. Health professionals in China reported that, while screening for diabetes and periodontitis, increasing patient referral and improving interprofessional collaboration would be feasible, these were not within their scope of practice. Oral health screening was rarely conducted by CMPs or CNs, while dentists were not comfortable discussing diabetes with patients. Most participants believed that better collaboration would benefit patients. Chinese professionals concurred that interprofessional collaboration is vital for the improved management of diabetes and periodontitis. These views were similar in Melbourne, except that Shanghai health professionals held increased confidence in managing patients with diabetes and were more welcoming to increased oral health training.
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    Social practice theory: An innovative approach to considering preschool children's poor oral health
    Durey, A ; Gibson, BJ ; Ward, PR ; Calache, H ; Slack-Smith, L (WILEY, 2021-08)
    Oral disease in early childhood is highly prevalent and costly and impacts on the child and family with significant societal costs. Current approaches have largely failed to improve young children's oral health. This paper proposes a different approach to conceptualize poor oral health in preschool children (0-5 years) using social practices. Social practice theory offers an innovative perspective to understanding oral health by shifting emphasis away from the individual and onto how practical, social and material arrangements around the oral health of preschool children exist, change or become embedded in the social structures they inhabit. This novel approach contributes to the growing theoretical understanding in this area and has the potential to offer insights into the problem and ways it might be addressed.
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    Collaborative Oral Health Care
    Mamerto, ML ; Calache, H ; Ivanovic, A ; Bettega, A ; Martin, RE ; McKee, S (UBIQUITY PRESS LTD, 2021)
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