Overdenture Attachment Wear — NDEB AFK MCQ

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ModerateProsthodonticsOverdenture Attachment WearNDEB AFK

Which of the following prosthetic complications is most commonly associated with implant-supported overdentures retained by ball attachments?

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Correct answer: B — Attachment wear and need for replacement of retentive inserts

The most common maintenance issue with implant-supported overdentures using ball (or Locator) attachments is wear of the retentive inserts (nylon caps, rubber O-rings), requiring periodic replacement (typically every 6-12 months depending on use). This is a normal maintenance procedure and not a failure. Other common issues include denture base fracture (requiring reinforcement), attachment loosening, and acrylic tooth debonding. These prosthetic complications significantly outnumber biological complications (peri-implantitis, implant failure).

Reference: Misch – Contemporary Implant Dentistry, 4th ed., 2020