Papers by Duangjai Lexomboon
Oral health of elderly person has many close links to general health and wellbeing. Periodontal d... more Oral health of elderly person has many close links to general health and wellbeing. Periodontal disease is associated with various diseases such as diabetes, cardiovascular diseases, and stroke. Co ...
Australian Dental Journal, 2003
The aim of the present study was to determine the remineralization effects of xylitol chewing gum... more The aim of the present study was to determine the remineralization effects of xylitol chewing gum containing funoran and calcium hydrogenphosphate on enamel subsurface lesions in humans. The study was a double-blind, randomized, cross-over design, with 4 types of gum: (1) xylitol gum, (2) xylitol gum containing funoran and calcium hydrogenphosphate, (3) sugar gum, and (4) gum base as a control. Seven subjects were instructed to wear removable lingual appliances, with half-slab insets of human enamel containing demineralized subsurface lesions. They were told to chew gum for 20 minutes 4 times per day for 7 days. Upon completion of each treatment the enamel half-slabs were paired with their respective demineralized control half-slabs, embedded, sectioned, and subjected to microradiography and densitometric image analysis, for measurement of the level of remineralization. The mean area of remineralization (∆Zd-∆Zr) and mean percent remineralization (%R) in those chewing xylitol gum containing funoran and calcium hydrogenphosphate were significantly higher than the corresponding values for xylitol gum, sugar gum and gum base. Chewing xylitol gum containing funoran and calcium hydrogenphosphate has a significant effect on the remineralization of initial caries-like lesions of the teeth.
Dental Traumatology, 2015
The aims of this study were to determine the incidence of injuries to permanent incisors in 2011-... more The aims of this study were to determine the incidence of injuries to permanent incisors in 2011-2013 in children aged 8-10 years living in the county of Värmland, Sweden, and to compare it with the incidence rates in 1989/1990 in the county of Västmanland, as well as to determine the cause of dental trauma in relation to time and place. The study analysed the patient records from dental visits (2011-2013) of trauma to the permanent incisors in children aged 8-10 years. The incidence rates were the incidence per 1000 children at risk. Standardized incidence rates were calculated for the comparison between different years. Information about month, location where the trauma occurred as well as cause of trauma was recorded. A total of 2.2% of 21 721 children aged 8-10 years had experienced at least one trauma. The incidence rate in Värmland increased from 18.9 in 2011 to 21.3 in 2012 to 28.5 in 2013. The standardized incidence rate in Värmland in 2011 and 2012 was not significantly different than in Västmanland in 1989/1990 (P > 0.05), but the standardized rates in 2013 were significantly higher than in 1989/90 (P < 0.001). Dental trauma occurred most often outdoors, followed by sports arenas/sports fields, and more often at school than at home. Falling and slipping was the most common cause of trauma, followed by accidents during leisure activities, playing and sports. The incidence rate for dental trauma has not decreased in the past 20 years, and there is an indication that parents and teachers should be more aware of the risks of dental trauma at leisure times and at school as well as during sports and exercise.
The Southeast Asian Journal of Tropical Medicine and Public Health, Mar 1, 2012
Abstract. This study reports the effects of a pilot multi-level oral health intervention on careg... more Abstract. This study reports the effects of a pilot multi-level oral health intervention on caregivers' oral health practices and their determinants. Quasi-experimental, pretest-posttest evaluations using a comparison group design were employed to evaluate the effectiveness of a proposed intervention for promoting caregiver oral health behavior. The intervention consisted of three components: home visits by lay health workers (LHWs), enhancing oral health education and services at health centers, and community mobilization. These components were designed to target factors at intrapersonal, interpersonal, organizational and community levels based on a Social Ecological Model (SEM). Four oral health behaviors associated with early childhood caries (infant bottle feeding, tooth brushing, snack consumption and fluoride use), and multi-level determinants were assessed during pre- and post-tests. The one-year intervention demonstrated a positive effect on tooth brushing, using toothpaste, and fluoride supplements, but did not have a significant effect on bottle feeding and snack consumption among children. The intervention also had no effect on dental caries; in fact caries increased in both control and experimental groups. The caregiver knowledge, attitudes, outcome expectations, and self-efficacy towards these behaviors were significantly increased in the experimental group after intervention. Caregivers in the experimental group received greater social support by LHWs and health center staff than those in the control group (p < 0.001). The program had an impact on integrating oral health services at health centers and community participation in children's oral health. These findings confirm multi-level factors influence reported oral health behavior, but not outcomes in terms of caries. Process evaluation is needed to determine actual implementation levels, barriers and suggests for modification of the program in the future to improve outcomes in terms of caries.
The Southeast Asian Journal of Tropical Medicine and Public Health, May 1, 2010
The objectives of this study were to determine the prevalence of early childhood caries and the o... more The objectives of this study were to determine the prevalence of early childhood caries and the oral health status in children aged 36-47 months in Vientiane, the capital city of Lao PDR. This study also aimed to assess the feeding practices, snack consumption, oral hygiene practices, and dental visits of children at this age. A total of 400 children were selected for oral examination and their caretakers were interviewed. The results showed the prevalence of dental caries was 82% with mean decayed, missing and filled teeth (dmft) ± SD 5.5±4.3 teeth. No missing teeth were found (mt=0), and the mean filled teeth (ft) was only 0.02. The teeth most affected by dental caries were the upper right and left central incisors, followed by the upper right and left lateral incisors, lower molars, upper molars, upper canines, lower canines and lower central incisors. The least affected were the lower right and left lateral incisors. Factors that affected dmft were tooth brushing frequency, brushing with parental assistance or supervision, time brushing started, feeding pattern, and the type of milk, candy and sweet beverages consumption. It can be concluded that children in the studied area had a high prevalence of caries and a high level of severity. Thus, oral health care programs should be promoted in Vientiane.
Introduction: Since 1999, Bhutan has experienced rapid socioeconomic transformations that changes... more Introduction: Since 1999, Bhutan has experienced rapid socioeconomic transformations that changes people’s lifestyle. This study was undertaken to assess oral health of children focusing on caries prevalence expressed as DMFT and periodontal conditions and associated factors in 12 year-old children residing in Thimphu, the capital of Bhutan. The total student population in 12 years age group is 4,417 out of the total city population of 80,000. Patients and methods: The study was approved by the Institutional Review Board–Mahidol University and the National statistical Bureau–Royal Government of Bhutan. A total of 461 children age 12 years with permanent dentition were randomly selected and underwent oral examination after positive parental consents. A structured questionnaire regarding family socio-economic status (SES), knowledge, attitude and practice related to oral health and dental care were filled out by the children with the help of their parents on SES. Caries and periodonta...
This study is intended to compare the dental health personnel supply to the requirement in each 5... more This study is intended to compare the dental health personnel supply to the requirement in each 5-year interval from 1995 to 2015. The dental health personnel supply was calculated by subtracting the annual personnel loss from the current active personnel plus the annual personnel production. The results show that there will be 10,100 dentists and 7,718 dental nurses in supply in the year 2015. The personnel requirement was calculated using 3 different techniques; the population ratio technique, the FDI/WHO technique, and the system dynamics technique. The dental personnel to population ratio of 1:5,000 was used to calculate the personnel requirement in the population ratio technique. The FDI/WHO and the system dynamics techniques calculated the personnel requirement by converting the need for service into the need for personnel. While the FDI/WHO technique calculated the need for service based on the lifetime of care for each age cohort, the system dynamics technique calculated the...
Introduction: The dental caries in preschool children living in underserved remote rural areas in... more Introduction: The dental caries in preschool children living in underserved remote rural areas in Thailand is a dental public health problem. The limited access to dental care contributes to the significance of an effective oral health promotion program that based on resources available in these areas. Objectives: To reduce dental caries rate and risk behaviours in pre-school children as well as to increase oral care knowledge and attitude of child-caretakers living in underserved rural areas. Method: A pilot community-based oral health promotion program was launched in Srimongkol Sub-district, Kanchanaburi Province. The program included tooth brushing after lunch, limited cariogenic snacking during school time, oral health educational games, fluoride varnish application every six months by dental nurses in school setting, and mass media oral health campaign in the village. Results: A three-year evaluation compared caries experiences of 40 children at year-three in a childcare cente...
Objective: To assess whether a public educational program can increase knowledge and attitude rel... more Objective: To assess whether a public educational program can increase knowledge and attitude related to oral health, as well as self care behavior among remote rural area people in Thailand. Methods: An interviewed questionnaire was used to measure attitude, knowledge, and self-care practice at pre- and post-intervention among people living in Ban Nayao Village, Sanamchaiket District, Chachengsao Province. Two households from each 34 blocks were selected in a systematic manner. The program used community radio broadcasting as the main educational media and posters as supplements. One out of 57 messages, each 2-4 minutes long, was broadcast at the beginning of each hour from 8.00-19.00. Fifty posters were placed in the community gathering areas such as market, shops, and restaurants. The posters were replaced with new ones after two months in display. Results: The pre-intervention assessment showed that 71.1% of 154 persons, age 16 89 years old, listened to this radio frequency regu...
In the1970s, dental manpower in Thailand was found to be in short supply. In response to this sho... more In the1970s, dental manpower in Thailand was found to be in short supply. In response to this shortage, both the Ministry of University Affairs (MoUA) and the Office of National Education Council (ONEC) proposed production plans to expand the supply of dentists. As a consequence, the production of dentists has been increasing dramatically over the past 20 years.Experience from many countries has shown that such a rapid expansion of supply for dentists, if not periodically evaluated, could lead to a state of oversupply. This paper projects the supply of dentists in Thailand for the next 30 years, using the proposed first year enrollment plans of MoUA and ONEC, in order to compare future supply with the projected requirements. WHO models for projecting workforce supply and requirements and cohort retention rate method were used in this study. The student dropout rate used in this study was found to be approximately 2%, equal to the one used in MoUA plan.Estimated quinquennial retentio...
The Southeast Asian journal of tropical medicine and public health, 2012
Abstract. This study reports the effects of a pilot multi-level oral health intervention on careg... more Abstract. This study reports the effects of a pilot multi-level oral health intervention on caregivers' oral health practices and their determinants. Quasi-experimental, pretest-posttest evaluations using a comparison group design were employed to evaluate the effectiveness of a proposed intervention for promoting caregiver oral health behavior. The intervention consisted of three components: home visits by lay health workers (LHWs), enhancing oral health education and services at health centers, and community mobilization. These components were designed to target factors at intrapersonal, interpersonal, organizational and community levels based on a Social Ecological Model (SEM). Four oral health behaviors associated with early childhood caries (infant bottle feeding, tooth brushing, snack consumption and fluoride use), and multi-level determinants were assessed during pre- and post-tests. The one-year intervention demonstrated a positive effect on tooth brushing, using toothpa...
The Southeast Asian journal of tropical medicine and public health, 2010
The objectives of this study were to determine the prevalence of early childhood caries and the o... more The objectives of this study were to determine the prevalence of early childhood caries and the oral health status in children aged 36-47 months in Vientiane, the capital city of Lao PDR. This study also aimed to assess the feeding practices, snack consumption, oral hygiene practices, and dental visits of children at this age. A total of 400 children were selected for oral examination and their caretakers were interviewed. The results showed the prevalence of dental caries was 82% with mean decayed, missing and filled teeth (dmft) +/- SD 5.5 +/- 4.3 teeth. No missing teeth were found (mt = 0), and the mean filled teeth (ft) was only 0.02. The teeth most affected by dental caries were the upper right and left central incisors, followed by the upper right and left lateral incisors, lower molars, upper molars, upper canines, lower canines and lower central incisors. The least affected were the lower right and left lateral incisors. Factors that affected dmft were tooth brushing frequen...
Journal of the American Geriatrics Society, 2013
Australian Dental Journal, 2003
The anticariogenic potential of casein phosphopeptide-amorphous calcium phosphate nanocomplexes (... more The anticariogenic potential of casein phosphopeptide-amorphous calcium phosphate nanocomplexes (CPP-ACP) has been demonstrated using laboratory, animal and human in situ caries models. The aim of this study was to determine the effect of CPP-ACP incorporation into a sugar-free lozenge (pressed mint tablet) on enamel remineralization in a human in situ model.
Ageing and Society, 2014
The aim of the research presented is to determine the influence of socio-economic factors in chil... more The aim of the research presented is to determine the influence of socio-economic factors in childhood and mid-life on multiple tooth loss and chewing problems in mid-and late life in three Swedish birth cohorts (-, - and -). Longitudinal national Swedish surveys were used for the analysis. Participants were interviewed in mid-life in and later in life (- years of age) in . Childhood socio-economic positions (SEP) did not result in different odds of multiple tooth loss and chewing problems in mid-and late life, but persons with higher mid-life SEP had lower odds. Persons born into the - birth cohort had significantly lower odds of multiple tooth loss in late life than the - birth cohort. Women had higher odds of losing multiple teeth than men in late life but not mid-life. Neither gender nor childhood and mid-life SEP predicted chewing problems late in life, but older people with multiple tooth loss had higher odds of chewing difficulty than those with mainly natural teeth. Childhood conditions may contribute to multiple tooth loss in mid-life, which subsequently contributes to multiple tooth loss in late life. Tooth loss in late life is strongly associated with difficulty chewing hard food. Prevalence of multiple tooth loss is higher in women than in men in late life but not in mid-life.
Journal of the American Geriatrics Society, 2012
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Papers by Duangjai Lexomboon