LLUSD - Chapter 25 - The Use of Implants For Orthodontic Anchorage Animal studies have shown that root form implants can resist 3 Newton orthodontic forces and 10 Newton orthopedic forces without failing.*TrueFalseRoot form implants have been used as anchorage for the purpose of palatal expansion.*TrueFalseWhen root form implants are used for orthodontic anchorage to close an edentulous space, the teeth being moved into the space have been found to move at a rate of about 1.5 millimeters per month.*TrueFalseWhen Roberts used ramus implants to move molars anteriorly and close a missing mandibular molar space mandibular molar space, the rate of movement per month increased after the first two months.*TrueFalseRoot form implants have been used to intrude teeth, extrude teeth, but have not been used to simultaneously intrude one tooth while extruding another tooth.*TrueFalseRoot form implants need to have at least 50% of their surface in direct contact with bone to resist the orthodontic forces placed upon them when they are used for anchorage.*TrueFalseThe concept of using implants for orthodontic anchorage is relatively new, having been introduced after endosseous root form implants became popular in the 1980's.*TrueFalseRoot form implants work well for orthodontic anchorage because they are incapable of movement in the bone.*TrueFalse
