Knowledge and practice towards early orthodontic problems among general dentists and paediatric dentists.

OBJECTIVES: To assess the knowledge, practice and challenges faced by general dental practitioners (GDPs), paediatric dentists (PDs) and postgraduate paediatric dentistry students (PGPDSs) in diagnosing and managing early orthodontic problems. DESIGN: Cross-sectional study. METHODS: A total of 159 dentists were enrolled in this study (121 GDPs, 21 PDs and 17 PGPDSs). Data were collected using a self-administered questionnaire involving two sections. Section A included questions regarding demographic features and orthodontic practice. Section B included photos of 12 orthodontic cases that needed early intervention. Knowledge and practice were assessed using six questions for each case that was then rated using predefined scores of poor (score <50%), average (score 50%-75%) and good (score >75%). RESULTS: The knowledge scores regarding the identification of early orthodontic problems were average among the three groups with GDPs having the lowest score (P = 0.0001). The knowledge scores regarding the selection of optimal treatment time were average among the PDs and PGPDSs, and poor among GDPs. GDPs tended to refer most of their cases to an orthodontist except for cases of thumb sucking. PDs and PGPDSs were more confident in treating anterior crossbite, thumb sucking habits and delayed eruption of incisors. All participants scored 'poor' regarding the selection of an appropriate orthodontic appliance. There was no significant correlation between knowledge and practice (P > 0.05). CONCLUSION: PDs and PGPDSs showed higher knowledge and practice scores when compared to GDPs. For all three groups included in this study, lack of clinical skills was the main reason for not treating early orthodontic problems.

A comparative assessment of oral health-related quality of life of children born with orofacial clefts in Sudan and their caregivers'.

BACKGROUND: Cleft lip and palate(CL/P)is the most common orofacial malformation affecting one in every 700-1000 newborns worldwide. The aim of the study wasto evaluate the impact of CL/P on health- related quality of life (OHRQoL) in Sudanese children and the level of concordance between caregivers' and children and to investigate correlates of the caregivers' perceptions of OHRQoL with that of their children. METHODS: The sample consisted of 75 children with clefts (age range 8-16 years), (46 male, 29 female) and their caregivers' attending University of Science and Technology Dental Teaching Hospital. The children and their caregivers' were interviewed separately. The interview consisted of 38 questions adopted from the COHIP (Arabic version).The level of concordance between caregivers' and children was compared using paired t-tests and intraclass correlations. Predictive validity was assessed using Pearson correlations and linear regression analyses. RESULTS: The translated COHIP and its subscales, had Cronbach' alphas score ranged between (0.65 and 0.75) for caregivers' and children with cleft. COHIP scores for children and caregivers' were (89.41 ± 19.97) and (94.34 ± 19.52) respectively. Caregivers' and children differed significantly in the overall COHIP and oral symptoms subscale. There were high correlations between caregivers' and children ranged from (0.63 to 0.87). The correlation between all subscales was statistically significant (p = 0.05). CONCLUSIONS: Caregivers' had higher perceptions of oral symptoms and overall COHIP compared to their children using the Arabic version of the COHIP. Caregiver's reports have to be considered complementary to the reports of their children themselves.

Oral Health-Related Quality of Life Among Sudanese Children Treated for Cleft Lip and Palate.

OBJECTIVE: This study compared the oral health-related quality of life (OHRQoL) among children with a cleft lip with or without a cleft palate (CL±P) and a group of their peers. The reliability of the Arabic version of the Child Oral Health Impact Profile Questionnaire (COHIP) was also assessed. DESIGN: A cross-sectional study. SETTINGS: Cleft clinic in a private dental college in Omdurman City, Sudan. PATIENTS: In all, 75 children (mean age 11.3 ± 2.5 years) with a history of CL±P and a group of 150 school children without CL±P (mean age 11.4 ± 2.6 years). MAIN OUTCOME MEASURES: Overall and subscale scores on the Arabic version of the COHIP. RESULTS: Test-retest reliability of COHIP in Arabic was high with an interclass correlation coefficient >0.8. Cronbach α value internal consistency was 0.8 for the total scale and between 0.7 and 0.8 for the subscales. The COHIP score was 89.41 ± 19.97 in children with CL±P and 122.82 ± 9.45 for the control group. Children with CL±P had significantly lower scores on the overall and all subscales when compared to children without CL±P (P ≤ .001). Among the children with CL±P, there were no statistically significant differences on the COHIP based on age and/or gender (P ≥ .05). CONCLUSIONS: Children with CL±P had a relatively high OHRQoL, which was lower than that of their peers without CL±P in both the overall scale and all subscales. Gender and age differences had no significant impact on the OHRQoL. The COHIP Arabic version showed appropriate reliability.

Inheritance of susceptibility to root resorption associated with orthodontic force in mice.

INTRODUCTION: External apical root resorption (EARR) is an unwanted sequelae of orthodontic treatment. Genetic factors account for approximately 64% of the EARR variation in humans. Inbred mice offer a model to control the environmental factors and genetic heterogeneity that complicate human genetic studies. Genetically distinct inbred mice and their offspring (F1s) were analyzed to examine the mode of inheritance and the influence of parental sex on the susceptibility to root resorption associated with orthodontic force (RRAOF). METHODS: RRAOF was determined histologically for male and female mice of the A/J, DBA/2J, and BALB/cJ strains, and the A/JxDBA/2J and A/JxBALB/cJ crosses (10 males and 10 females/reciprocal cross). RRAOF was induced by tipping the maxillary first molar mesially for 9 days. RESULTS: Sex differences were observed only among the mice of the BALB/cJ strain. Two patterns of inheritance were observed; F1s from the A/JxBALB/cJ cross were resistant, suggesting that the A/J have dominant resistance alleles. On the other hand, F1s from the A/JxDBA/2J cross showed RRAOF intermediate between their parental mice, suggesting a polygenic trait. CONCLUSIONS: These results provide evidence of a traceable and polygenetic component affecting RRAOF in mice.