In Vitro Comparison of the Retentive Properties of Ball and Locator Attachments for Implant Overdentures

Abstract

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Precision Attachments: A Review to Guide Clinicians

“…The data collected in in vitro studies [21,27,33] showed differences between the retention or distribution of forces. Some authors suggest that the retention of the overdenture changes over time due to wearing of the attachments.…”

“…Some authors suggest that the retention of the overdenture changes over time due to wearing of the attachments. Systems like the locator and metal bar are less likely to wear over time, even after the simulation of 5000 cycles of insertion [21]. Therefore, they should have a better clinical outcome than ball attachments and magnets [10,11,21,27].…”

“…Systems like the locator and metal bar are less likely to wear over time, even after the simulation of 5000 cycles of insertion [21]. Therefore, they should have a better clinical outcome than ball attachments and magnets [10,11,21,27]. In a clinical trial, it has been reported that the locator and ball attachments need to be replaced with almost the same frequency [24].…”

“…A locator is a modern, prefabricated, selfaligning method that is able to maintain both the vertical and hinge resiliency [21]. It is considered the system with the lowest profile height [22], 0 to 6 mm depending on the gingival thickness.…”

“…It is considered the system with the lowest profile height [22], 0 to 6 mm depending on the gingival thickness. Consequently, they are especially indicated when the height of the denture and the inter-arch distance is inadequate for ball attachments or other attachments systems [21]. The minimal height required is 3.7 mm, but by virtue of a larger diameter, this factor is also responsible for increasing its strength [23].…”