In Vitro Evaluation of the Retentive Effectiveness of Axial Attachments Used in Implant-Retained Overdentures After 1 Year of Function

doi:10.11607/jomi.8908

Q2 · DentistryImpact Factor · 1.088

AutoresChávarri-Prado D, Brizuela-Velasco A, Diéguez-Pereira M, Chento-Valiente Y, Estrada-Martínez A, Pérez-Pevida E, Álvarez-Arenal Á

Por qué importa

Este estudio in vitro evalúa la retención de diferentes sistemas de attachments axiales utilizados en sobredentaduras implanto-soportadas tras someterlos a simulaciones de masticación y ciclos de inserción/remoción durante un año. La pérdida de retención es un factor crítico en la longevidad y funcionalidad de estas prótesis, afectando directamente la satisfacción del paciente. Los resultados comparan el comportamiento de los sistemas Dalbo Classic, Locator (con diferentes insertos) y Klockner Rotula, identificando aquellos que mantienen una fuerza de retención clínicamente aceptable a lo largo del tiempo y evidenciando la pérdida progresiva inherente a todos ellos. Conocer estas diferencias es fundamental para el odontólogo a la hora de seleccionar el sistema de attachment más adecuado para cada caso, optimizando así los resultados protésicos a largo plazo.

Abstract original

Purpose: The aim of this study was to measure and compare the retention degrees of different attachment systems before and after 1 year of mastication and removal/insertion simulations. Materials and methods: A 4 × 10-mm implant embedded in self-curing acrylic resin was placed inside a rectangular metal frame installed in a plastic container with artificial saliva at 37°C. Three different attachment systems were connected to the implants: Dalbo Classic, Locator (with blue, pink, and clear inserts), and Klockner Rotula. A loading test at 100 N and 1.25 Hz frequency was repeated 10 times for each attachment (changing the matrix component or plastic insert) until a total of 300,000 cycles and 1,095 removal/insertion sequences. The retention force was assessed at baseline until the end of the test (1 year) after 3-month intervals of simulation. One-way analysis of variance (ANOVA) and post hoc Tukey test (P < .05) were performed for statistical analyses. Results: Klockner Rotula showed the highest retention values at the beginning (69.6 ± 9.2 N; 7.1 ± 0.9 kg) and the end of the test (51.4 ± 5.4 N; 5.2 ± 0.6 kg), while Dalbo Classic showed the lowest values both at the beginning (13.1 ± 1.7 N; 1.3 ± 0.2 kg) and the end of the test (6.7 ± 1.6 N; 0.7 ± 0.2 kg). Locator with clear insert exhibited the lowest retention loss ratio (20.4%), while Locator with blue insert showed the highest (50.8%). At the end of the test, all attachment systems showed a significant decrease in retention force in comparison with the initial retention (P < .001). Conclusion: Locator attachments with clear and pink inserts and the Klockner Rotula attachment system showed retention forces > 20 N (2 kg) after 1 year of mastication and prosthesis insertion/removal simulation. All attachment systems showed a progressive loss of retention, which was higher for Locator attachments with blue and pink inserts and Dalbo Classic. The Klockner Rotula attachment system showed the highest retention values both at the beginning and the end of the test.

Leer texto completo ↗DOI · 10.11607/jomi.8908

Autores Doctor&Cols

Cómo citar

Chávarri-Prado D, Brizuela-Velasco A, Diéguez-Pereira M, Chento-Valiente Y, Estrada-Martínez A, Pérez-Pevida E, et al. In Vitro Evaluation of the Retentive Effectiveness of Axial Attachments Used in Implant-Retained Overdentures After 1 Year of Function. The International Journal of Oral & Maxillofacial Implants. 2022. doi:10.11607/jomi.8908