Sweden & Martina Polyamide Caps for Ball Attachments The Sweden & Martina Polyamide Caps for Ball Attachments are designed for secure and versatile overdenture anchoring. The system includes a steel container with grooves to optimize resin anchoring and a polyamide retainer that can be replaced chair-side without altering the overdenture structure. In cases of limited space, the polyamide retainer can be used without the metal container, though this may lead to faster wear and more invasive replacement. Features Steel container with grooves for optimal resin anchoring Polyamide retainer replaceable chair-side without prosthesis adjustment Can be used without metal container in limited spaces Durable and biocompatible material Provides reliable retention for overdentures Packaging 1 × Polyamide Cap