Necrotizing ulcerative gingivitis (NUG) is a typical form of periodontal diseases. It has an acute clinical presentation with the distinctive characteristics of rapid onset of interdental gingival necrosis, gingival pain, bleeding, and halitosis. Systemic symptoms such as lymphadenopathy and malaise could be also found. There are various predisposing factors such as stress, nutritional deficiencies, and immune system dysfunctions, especially, HIV infection that seems to play a major role in the pathogenesis of NUG. The treatment of NUG is organized in successive stages: first, the treatment of the acute phase that should be provided immediately to stop disease progression and to control patient's feeling of discomfort and pain; second, the treatment of the preexisting condition such as chronic gingivitis; then, the surgical correction of the disease sequelae like craters. Moreover, finally, maintenance phase that allows stable outcomes. This case report describes the diagnosis approach and the conservative management with a good outcome of NUG in a 21-year-old male patient with no systemic disease and probable mechanism of pathogenesis of two predisposing factors involved.

This young Moroccan population is at high risk of destructive periodontal disease, and further studies are indicated to investigate the biological and environmental factors that may contribute to the increased risk of disease 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.

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Bone volume is one of the key factors to be considered when evaluating implant placement. When the bone volume is insufficient, implant placement could be conditioned by the necessity of preforming bone grafting procedures to compensate bone loss. Various grafting procedures can be used with different bone substitute. Mineralized Plasmatic Matrix (MPM) is one of these grafting materials, used to maintain or regenerate the socket's volume. In MPM, the autologous blood products highly concentrated in platelets and fibrin in a liquid state are combined with a bone substitute. The fibrin can become bound to bone particles. The filling material is easy to shape and a PRF-type membrane is also generated. In the present case we report the application of MPM in two sites presenting bone crest defects when placing implant in those areas.