What is a locator attachment?

A locator attachment is a dual-component fastening system designed to anchor a removable overdenture to dental implants. The male component attaches to the implant or a bar spanning multiple implants, while the female component fits into the underside of the overdenture itself. When the denture is seated, the two parts snap together, creating retention through mechanical engagement.

The system works through a combination of friction and undercut geometry. As the patient inserts the denture vertically, the female component slides over the male portion and clicks into place when fully seated. This snap-fit design holds the denture stable during normal function, such as eating and speaking, while allowing the patient to remove the prosthesis by unsnapping it upward with deliberate hand pressure.

Locator attachments offer a middle ground between fully implant-supported fixed bridges and conventional removable dentures. They provide better retention and stability than tissue-supported dentures alone, require fewer implants than some fixed options, and allow patients to maintain their own denture hygiene by removing the prosthesis daily. Because the overdenture can move slightly within the attachment, these systems also absorb some occlusal forces, reducing stress transmitted directly to the implant.

The attachment style and retention strength can be adjusted by replacing the female component with versions offering different retention levels, accommodating changes in patient strength or preference over time. Implant-supported dentures using locator attachments are a common choice for patients seeking improved function compared to conventional dentures.