Mechanical method of determining the best material for use as clear aligner composite resin attachment among experimented groups

An orthodontic method, comprising:

• forming a plurality of abrasive objects, each abrasive object from the plurality of abrasive objects including material usable for forming clear dental aligners on an exterior of said abrasive object;
• rubbing the plurality of abrasive objects against a plurality of composite objects, each composite object being made of a composite material, each abrasive object being rubbed on a different composite object from among the plurality of composite objects, wherein the composite material of each composite object is usable as material for forming attachments on teeth in dental clear aligner therapy;
• determining an amount of wear on the plurality of composite objects as a result of the rubbing;
• identifying a composite object with a least amount of wear from among the plurality of rubbed composite objects;
• and
• using the composite material that the composite object identified as having the least amount of wear is made of to make an attachment for a tooth of a clear dental aligner therapy patient.