Prosthetic complications associated with implant-supported overdentures with the Locator system: A retrospective...

The present study aimed to identify and characterize the prosthetic complications associated with the use of the Locator system in implant-supported overdentures. The objectives were to determine their prevalence, evaluate the clinical management of overdentures with Locator abutments in relation to retention loss, and analyze possible associations between these complications and relevant clinical variables.

A retrospective observational study was conducted at the University Dental Clinic of Universidad Europea de Valencia, including patients over 18 years of age treated between 2016 and 2024 with implant-supported overdentures using the Locator system. A total of 41 patients with 46 overdentures were analyzed. Data collection was based on digital clinical records, and statistical analysis was performed using SPSS software, employing both descriptive and inferential tests.

Of the overdentures analyzed, 69.57% presented at least one prosthetic complication. The most frequent issues were mucosal ulcers and mechanical failures such as loss of the metal housing, loosening or loss of the Locator abutment, and fracture of prosthetic components. Retention loss was the primary reason for clinical intervention, with replacement of retentive inserts being the most common procedure, especially during the first year after placement.

Prosthetic complications in overdentures with the Locator system are common and require early clinical attention. No significant associations were found with clinical variables such as age, sex, treated arch, or number of implants. Prospective studies with larger sample sizes are recommended to identify risk factors and optimize maintenance protocols.