Effect of Simulated Mastication on the Retention of Locator Attachments for Implant‐Supported Overdentures: An In Vitro Pilot Study

Abstract

The results suggest that short-term simulated mastication affects the extra-light blue inserts but not the more-retentive inserts.

Effect of Denture Cleansing Solutions on the Retention of Locator Attachments Over Time

“…Although patients remove their dentures several times a day from their fixtures over the 1‐year period, only one‐pull test was performed in this study. Also, thermal changes and immersing in different denture cleansing solutions may easily alter the retentive value of attachments after multiple cycles and pull out tests …”

“…Also, thermal changes and immersing in different denture cleansing solutions may easily alter the retentive value of attachments after multiple cycles and pull out tests. 15,16 Besides, new Locator attachments that have 4-different retention values and internal geometry are available in the market. Subsequent studies may be based on factors affecting the retention values of these attachments under masticatory cycles.…”

In Vitro Effect of Mastication on the Retention and Wear of Locator Attachments in a Flat Mandibular Ridge Model

“…Thirty base units simulating 30 nonanatomic mandibular edentulous flat ridges were fabricated using cylindrical stone models with two embedded implant replicas (3.5 mm x 15 mm), (Astra; Dentsply Implants, Mölndal, Sweden) in bilateral canine position (Fig ). The fabrication of the stone model has been previously described . Briefly, two parallel implant analogs were positioned in a standardized manner at a distance of 22 mm between their centers in a prefabricated one side open‐ended resin cylinder (CS‐4; SD Mechatronik GmbH, Feldkirchen‐Westerham, Germany).…”

“…Thirty identical T‐shaped acrylic resin units (30 mm long, 20 mm wide, 10 mm thick) equipped with two metallic rings were fabricated to simulate the opposing denture units as described previously (Fig ) . The metal Locator housings with the black processing inserts were picked‐up into the corresponding denture recesses using cold‐cured acrylic (Unifast Trad; GC America Inc., Alsip, IL).…”

“…Chewing may induce different patterns of structural changes and retention loss when compared to cyclic insertion‐removal . Limited data are available relative to the effect of masticatory loading on the retentive properties and wear characteristics of the Locator attachment system . Wear and deformation were reported under simulated function but quantitative documentation is scarce …”