01 October 2023

• CAD/CAM versus conventional fixed retainers in orthodontic patients

  This review comparing the effect of CAD/CAM-based and conventional fixed retainers on the stability of treatment outcomes and periodontal health in patients undergoing orthodontic retention using fixed retainers includeds 7 RCTs. The studies are of moderate size and relatively short duration (6 to 12months) and there are quality concerns so the findings should be viewed cautiously.

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• Supportive care to prevent recurrence or progression of peri-implantitis

  This review of whether supportive care is effective in preventing recurrence or progression of peri-implantitis included 15 studies. However none of the included studies was specifically designed to test supportive care regimens so there is a need for new well conducted and reported randomised trials of appropraite size and duration to provide better quality evidence.

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• How clean is your toothbrush?

  This review of the level of toothbrush contamination and the factors affecting contamination in the general population included 15 studies. The findings show that toothbrush contamination occurs after first use and rises with continuing use. However, there is little evidence of significant adverse events from current practices.

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