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There are few large surveys of periodontal disease in young age cohorts, and national surveys in Africa do not exist. This study assessed the prevalence and severity of periodontal disease in a national survey of adolescents and young adults in Morocco.A multistage probability sampling design was used to draw a sample of 14,667 students 12-25 years old attending 87 schools. The sample was representative of approximately three million Moroccan students in this age group.A total of 27.9%, 11.9%, and 7.7% of the subjects had ≥1 teeth with ≥4, ≥5, and ≥6 mm probing depth, and the population estimates were ≈ 822,436, 349,961, and 226,297 affected subjects, respectively. For attachment loss, the prevalences were: 11.6%, 9.5%, and 6.9% (or ≈ 341,761, 281,043, and 203,977 affected subjects) for ≥4, ≥5, and ≥6 mm, respectively. The rates of probing depth and attachment loss increased significantly with the increase in age (p 0.01, p 0.001). Sex and urban status did not show significant effects on the prevalence of periodontal disease (p 0.05). Similarly, the relationship between the occupation status and periodontal status was modest and not statistically significant (p 0.05).Children and young adults attending public schools in Morocco have a high prevalence and severity of periodontal disease compared with other populations of similar age. The rate of periodontal disease reported here may be used as baseline population estimates in the surveillance of disease status in this population.

Background To report the prevalence of peri-implant diseases in a North African patient population, and to assess the concurrent associations of patient- and implant-level characteristics with probing depth and bone loss around dental implants METHODS: A total of 642 implants in 145 subjects were followed up for a mean 6.4 years. At the last follow-up visit the subjects were examined clinically and radiographically to assess the status of peri-implant tissues and teeth. Data analysis used the generalized linear mixed models RESULTS: The prevalence of peri-implant mucositis and peri-implantitis were 82.1% and 41.4% at the subject level, and 68.4% and 22.7% at the implant level, respectively. Inadequate plaque control, peri-implant inflammation, history of previous implant failures, and pain/discomfort at the implant site were significantly associated with both outcomes (increased probing depth and bone loss). Diabetes mellitus, inadequate implant restoration, single restorations (versus multi-unit), cement-retained restorations, and presence of occlusal wear facets on teeth were significantly associated with one of the two outcomes. Implants placed in the lower anterior jaw region had the most favorable outcome. Smoking, history of periodontitis, and type of implant surface did not show significant associations with higher frequency of peri-implant diseases in the multivariable analysis. Conclusions Peri-implant diseases are prevalent in this North African patient population. Multiple subject- and implant-level variables were associated with peri-implant diseases. Risk assessment of these effects should consist of a concurrent inclusion of these factors in multivariable analyses that also adjust for the complex variance structure of the oral environment.