Treatment effects of intrusion arches and mini-implant systems in deepbite patients

Three-dimensional evaluation of maxillary anterior alveolar bone for optimal placement of miniscrew implants

“…For cases involving premolar extraction, the application of additional intrusion force after placing a miniscrew implant into the maxillary anterior region yields good results in patients with a gummy smile and a long face 8,9,10,11,12,13,14. In non-extraction patients with a deep bite, satisfactory results can be obtained by applying intrusion force toward the center of resistance after placing a miniscrew implant between the lateral incisor and the canine 8,9,10,11,12,13,14.…”

“…Patients with vertically overdeveloped maxillae have not always had good results from treatment by tooth extraction; frequently, gum exposure is actually increased after such attempts at correction. In contrast, anterior tooth intrusion using a miniscrew implant can provide good results because the surgeon can control the degree of gum exposure 8,9,10,11,12,13,14…”

“…In addition, recent clinical research findings on treatment with miniscrew implants at the maxillary anterior alveolar bone have been reported8,9,10,11,12,13,14 However, there is limited basic anatomical research aimed at determining the optimal placement of miniscrew implants.…”

The benefit of differential moment concept in managing posterior anchorage and avoiding bite deepening

“…1 The intrusion arch not only created vertical forces but also delivered a distal crown tip back moments on the molars to effectively control the anchorage loss often associated with sliding mechanic. 9 A frequently overlooked consideration in anchorage control is the first order side effect of space closure. The mesially directed, buccally located force on molar will tend to produce a mesially inward rotation.…”

Impact of anchorage miniscrews in multibracket treatments without extractions

“…Their potential has been demonstrated repeatedly during multibracket treatments for mesial movements 3,23 , for molar distalization 25,53,61,62 , for intrusion 18,64,65 , for extrusion 10,12 , for ''in masse'' retraction of anterior teeth 19,57,69 , or for maintaining anchorage in cases of premolar extractions 35,39,44 . A recent meta-analysis provides an update on their results compared to those obtained with extraoral force 43 and demonstrates greater anterior retraction and less loss of posterior anchorage with miniscrews.…”