This review of the effectiveness of different attachment systems for complete edentulous mandibular Implant-supported overdentures included 25 RCTs . The findings suggest no significant differences between attachment systems.
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This review of the clinical performance and self-reported patient outcomes of ball and stud attachments as mandibular overdenture retainers included 17 studies. While greater patient satisfaction was seen with the stud type almost all of the included studies were considered to be at high risk of bias so the findingas should be interpreted cautiously.
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6 RCTs were included in this Cochrane review of attachment systems for implant overdentures. The included studies provide insufficient evidence of relative effectiveness of prosthodontic success, prosthodontic maintenance, patient satisfaction, patient preference or costs.
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