Effects of Implant Angulations and Attachment Configurations on the Retentive Forces of Locator Attachment–Retained Overdentures

Abstract

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Locator Versus Bar Attachment Effect on the Retention and Stability of Implant‐Retained Maxillary Overdenture: An In Vitro Study

“…The highest initial retention was noted with Locator transparent, followed by Locator pink, Locator blue, and the bar attachment. This finding agreed with the results of several studies . ELsyad et al found that Locator medium recorded the highest initial retention compared to other types of Locator and O‐ring attachments.…”

“…In line with this explanation, Walton and Ruse reported that a large abraded area was observed on the gold bar, which is softer than the metal clip. The increased retention loss with Locator transparent was was mainly attributed to wear and plastic deformation of the nylon inserts and is in agreement with several studies . However, in these studies Hader bar with plastic clips showed minimal retention loss.…”

“…In this study, the initial forces for Locator and bar attachments ranged from 27.7 to 94.15 N. These values were greater than the minimum required retention values (10‐20 N) reported in the literature to be sufficient during long‐term function to achieve good patient satisfaction . Similarly, Uludag et al found that the initial retentive forces of Locator and Hader bar yellow clip attachments for 3‐implant‐retained mandibular overdentures ranged from 26.58 to 62.05 N.…”

“…Each measurement was repeated five times, and the mean was used to represent initial stability. The overdenture was inserted and removed 540 times to simulate a 6‐month period of overdenture use (assuming three daily removals and insertions for oral hygiene purpose). Another five measurements were performed, and the mean was used to represent final retention and stability.…”

Peri-implant strain around mesially inclined two-implant-retained mandibular overdentures with Locator attachments

“…The effect of distal (21)(22)(23) and mesial (24,25) inclinations of two-implant-retained overdentures with Locator attachments have been investigated. However, data regarding peri-implant strain around two-inclined implant-retained overdentures remain scarce (17,(26)(27)(28).…”