Oral habits and malocclusion in children resident in Ile-Ife Nigeria.

AIM: To determine the: prevalence of oral habits in children aged 1-12 years in Ife Central Local Government Area of Osun State Nigeria; association between oral habits and malocclusion in children aged 6-12 years; differences in orthodontic treatment needs of children with and without oral habits and the effect of digit sucking severity on occlusal profile. METHODS: This was a cross-sectional study that collected data through a household survey. Information collected included the age, gender, and oral habits of study participants. Intra-oral examination was conducted. The Dental Aesthetic Index (DAI) was used to assess orthodontic treatment needs for 6-12-year-old participants. Independent sample t test was used to compare mean DAI scores of participants with and without oral habits. A digit sucking severity index was developed and digit sucking severity was determined. RESULTS: One hundred and thirty (13.1%) study participants had 142 oral habits. The most common oral habit was digit sucking. The most common malocclusion traits were spacing (29.9%), crowding (21.7%) and increased overjet (16.4%). DAI scores were significantly higher in participants with tongue thrusting (p < 0.001) and bruxism (p = 0.01) habits compared with participants without the habits. Among the 67 participants with oral habits, 54 (80.6%) had no need for treatment, 9 (13.4%) needed elective treatment and treatment was mandatory for 4 (6.0%) participants. CONCLUSIONS: Digit sucking was the most frequently practiced oral habit in the study population. Tongue thrusting and bruxism were significantly associated with greater severity of malocclusion in children 6-12 years old when compared with peers who had no habits. Most children with oral habits had no need for treatment.

Impact of oral hygiene and socio-demographic factors on dental caries in a suburban population in Nigeria.

AIM: This was to determine dental caries determinants in the study participants. METHODOLOGY: This was a secondary data study extracted from primary data through a school-based study that recruited students from primary and secondary schools in a suburban population in Nigeria. The variables included age, gender, socio-economic status, oral hygiene status, type of parenting, birth rank, family size and presence of dental caries. The diagnosis of dental caries was based on the World Health Oral Health Survey recommendations while oral hygiene was determined using simplified-oral hygiene index (OHI-S). Data was analysed using STATA version 13, statistical significance was set at P < 0.05. RESULTS: The prevalence of dental caries for the study population was 12.2%, DMFT and dmft were 0.16 and 0.06 respectively. Children within age groups 11-13 and 14-16 years had reduced chances of having dental caries (P = 0.01; P = 0.01); children with fair oral hygiene and poor oral hygiene had increased odds of having dental caries (P ≤ 0.001; P ≤ 0.001), last child of the family also had increased odds of having dental caries while children from large family size had reduced odds of having dental caries. This study also showed that first permanent molars and second primary molars were mostly affected by dental caries but there was no significant difference between distribution of the maxillary or mandibular jaw or between right and left quadrants. CONCLUSION: Age, oral hygiene, birth rank and family size were the significant determinants of dental caries in the study population and the teeth mostly affected were first permanent molars and second primary molars.

Prevalence and family structures related factors associated with crown trauma in school children resident in suburban Nigeria.

BACKGROUND: Multiple risk factors have been identified for traumatic dental injuries, including crown fractures, in various age groups and various populations. The objective of this study was to determine the prevalence, risk factors and family related factors for crown trauma among 8 to 16 year-old children in a suburban population, Nigeria. METHODS: This is a secondary analysis of a data of 2107 children collected through a school-based survey. Study participants were 8 to 16 year-old resident in suburban Nigeria. The independent variables for the study were age, sex, socioeconomic status, and birth rank, family size and parenting status (one parent, step parent, both parents, and guardians). Details were collected using an interviewer administered questionnaire. Intraoral examination was conducted to identify presence of crown fracture. The independent variables associated with and predictors of crown trauma were determinedusing chi-square and logistic regression analysis respectively. RESULTS: Only 167 (7.9 %) of the 2107 study participants had crown trauma. The teeth level prevalence of crown trauma was 0.33 %. Children with middle socioeconomic status had reduced odds of having crown trauma when compared with children with low socioeconomic status (AOR 0.50; CI 0.32-0.80). The odds of having crown traumawas more than doubled in males when compared with females (AOR 2.41; CI 1.72-3.39) and almost doubled in children living with single parents when compared with children living with both parents (AOR 1.94; CI 1.29-3.05). CONCLUSIONS: The prevalence of crown traumawas low in this study population. Being a female and having lowsocioeconomic status significantly reduced the risk factors for crown traumawhile living with single parents increased risk for crown trauma.

Hypomineralised second primary molars: prevalence, pattern and associated co morbidities in 8- to 10-year-old children in Ile-Ife, Nigeria.

BACKGROUND: This study tries to determine the prevalence and co-morbidities associated with hypomineralised second primary molars (HSPM) in 8- to 10- year-old children in Ile-Ife, Nigeria; and the co-existence of HSPM and Molar Incisor Hypomineralisation (MIH) in the study population. METHODS: This was a cross sectional study involving 8- to 10- year-old children in schooling in suburban Nigeria. Information was collected on the child's age, sex and socioeconomic status. Intraoral examination was conducted to determine the presence of HSPM, MIH, caries and the oral hygiene status of study participants. The severity of HSPM was also determined. The prevalence of HSPM, the association between HSPM, sex and socioeconomic status of study participants, the difference in the prevalence of caries and poor oral hygiene in children with and without HSPM, and the prevalence of HSPM and MIH co-morbidity were determined. RESULTS: Twenty seven of the 469 children examined (5.8 %) had HSPM. The tooth prevalence of HSPM was 3.9 %. There was no significant sex (p = 0.06), age (p = 0.41), and socioeconomic status (p = 0.67) differences between children with HSPM and without HSPM. More children with HSPM had caries (p ≤ 0.001) and poor oral hygiene (p = 0.01). Children with HSPM have increased odds having dental caries (AOR: 6.34; CI: 2.78-14.46; p = <0.001) and reduced odds of having good oral hygiene (AOR: 0.32; CI: 0.13-0.78; p = 0.01) when compare with children without HSPM. Also 77.8 % of children with HSPM also had MIH. CONCLUSION: The prevalence of HSPM in the study population is significantly high. The large number of children with HSPM and MIH also suggests that HSPM is a predisposing factor for MIH. The significantly higher proportion of children with HSPM who had caries and poor oral hygiene makes it imperative to institute screening programmes for HSPM/MIH in the study population.

Prevalence, pattern and severity of molar incisor hypomineralisation in 8- to 10-year-old school children in Ile-Ife, Nigeria.

AIM: This study aimed to determine the prevalence, pattern and severity of MIH in school children resident in a suburban population in Nigeria. METHODS: This was a cross-sectional study involving pupils aged 8-10 years resident in suburban Nigeria. Details of each pupil's socio-demographic variables were collected. Intra-oral examination was conducted to determine the presence of MIH, the affected tooth and the severity of the lesion. The association between the prevalence of MIH and socio-demographic variables of each child was determined. The predictors of MIH were also determined using a binomial regression analysis. RESULT: Eighty-three of the 469 children examined (17.7 %) had MIH. There was no significant association between sex (p = 0.58), socio-economic status (p = 0.09), age (p = 0.26) and MIH. There was also no significant difference in the number of teeth affected by MIH in the maxilla and mandible, and on the right and left side of the face. The most commonly affected teeth were the left mandibular molars. The occlusal surfaces of the first molars were mostly affected by MIH and the severity of MIH on the teeth examined varied from mild (80.8 %), moderate (14.0 %) to severe (5.2 %). CONCLUSION: The prevalence of MIH in this study population is consistent with previous reports. The non-association between sex and MIH prevalence, the varied severity of the lesion and association between MIH affectation of the first permanent molars and central incisors give more weight to the possible role of environmental factors in the aetiology of the lesion. The non-association between MIH and socio-economic status may serve as a distinctive feature of MIH and chronological enamel hypoplasia.