Resistance to Wear of Four Matrices with Ball Attachments for Implant Overdentures: A Fatigue Study

Abstract

Gold alloy and Teflon matrices showed the highest retention values without retention loss after 3 years of simulated function. Titanium and O-ring matrices presented a continuous loss of retention with the highest wear on the ball attachments when combined with the titanium matrix.

Evaluation of volumetric wear of abutments on the retention loss of ball attachment systems in implant‐retained overdentures: An in vitro study

“…[18][19][20] Routine procedure for the maintenance of ball attachments is mainly to adjust or replace the inefficiently retentive female components to compensate for wear. [11][12][13][14]19,23,24 However, the vast of these studies focused on the wear of the female components. It has been shown that both gold and titanium male components showed noticeable signs of abrasion after 8 years of clinical use.…”

“…21 However, this procedure may not be adequate to gain the initial retentive properties in case of wear of the male components. [11][12][13][14]19,24 There is a lack of studies assessing the wear of the male components of the ball attachment systems. 22 The retention loss of ball attachments has been evaluated in many clinical and laboratory studies.…”

“…Every specimen underwent 5000 insertion and removal cycles corresponding tõ 4.5 years of functioning, assuming the prosthesis would undergo three daily insertions and removals 23,24. 001.…”

Effect of Implant Angulation on Attachment Retention in Mandibular Two‐Implant Overdentures: A Clinical Study

“…This finding is aligned with previous investigations showing that significant wear of spherical abutments occurs after 8 years of wearing IODs. 24 Possible reasons for a gain in the RA attachment retention could be from work hardening of the gold matrix alloy or geometrical adaptation (plastic strain) of the matrix. Progressive loss of retention in both systems was evident during the course of the present study.…”

“…22,23 No longitudinal information is currently available regarding the wear pattern of LA abutments. 24,25 One consideration in crossover studies is the potential phase effect, which results from the order the different therapies are delivered. However, occasional gain in retention was also observed ( Table 1).…”