prEN ISO 3843

Dentistry -- Dental attachments -- Measurement of placement and removal forces prEN ISO 3843

Scope

This document specifies a test method for measuring the forces needed for the placement and removal of dental attachments (frictional retention elements of ball head-, snap-on, prefabricated telescopic and bar systems used for the attachment, support and stabilization of crowns and bridges, single attachments, removable partial dentures, complete dentures, and other superstructures on dental implant systems and, if not other justified, on natural teeth and root post copings).
If not otherwise justified, this document can also be used for tests on custom-made or patient matched devices (e.g. laboratory manufactured).
This test method is not applicable to retention devices for which normal placement and removal requires any off-axis rotation for the path of least resistance.
This test method is not applicable to dental magnetic attachments, these are specified in ISO 13017.