Malocclusion and its impact on quality of life of school children in Nigeria.

BACKGROUND Malocclusion, though not life-threatening, is an important public health issue, which has a large impact on the individual, causing discomfort, social and functional limitations. OBJECTIVE To evaluate objectively orthodontic treatment needs in Nigerian schoolchildren and the impact of malocclusion on their quality of life. METHODS This cross-sectional study involved schoolchildren aged 12 to 16 years from four randomly selected secondary schools in Lagos, Nigeria. A prestructured questionnaire was administered and a clinical examination was conducted. Occlusal status was assessed for each subject using the Dental Aesthetic Index (DAI). Oral Health Impact Profile-14 (OHIP- 14) was also evaluated. RESULTS There were 410 (50.9%) females and 395 (49.1%) males aged 12 to 16 years. Mean age was 14.5±1.3 years. Irregularity of teeth was the most prevalent malocclusion. Generalised spacing and midline diastema were seen in 59% and 31% respectively; crowding in 43% of the schoolchildren. Other occlusal anomalies were recorded. There was no statistically significant difference between the sexes. Over one third of the study population did not need treatment, treatment was mandatory in 24.3%, elective in 21% and highly desirable in 17%. More females than males did not need orthodontic treatment. Oral conditions had no effect on the quality of life of 85.3% of the study sample. CONCLUSION Most Nigerian schoolchildren were found to have a dental appearance that needed orthodontic treatment. However, components of the oral conditions impacted on the quality of life of a few subjects. Psycho-social need is very important in orthodontic diagnosis.