Bodily tooth movement through the maxillary sinus with implant anchorage for single tooth replacement

Abstract

Movement of teeth through anatomic limitations, such as the maxillary sinus, can be a reliable therapeutic protocol if suitable force systems are used. We report here the outcome of a treatment based on this concept. The patient exhibited pneumatization of the maxillary sinus resulting from earlier extractions. She was treated using an endosseous implant inserted in the retromolar region to serve as orthodontic anchorage and a T-loop appliance fabricated from TMA wire to bodily move an upper second premolar through the sinus. After 6 months, at the end of the displacement, a titanium implant was inserted in the alveolus of the moved tooth and a single crown restoration was placed. The premolar moved through the sinus maintaining its support apparatus and bone. At the end of treatment the implant used for anchorage was still osseointegrated.

Morphologic evaluation of the incisive canal and its proximity to the maxillary central incisors using computed tomography images

“…Contact of tooth roots with the cortical plate has been addressed as a contributor to root resorption, [12][13][14]16 result in delayed tooth movement, 12 and may also cause perforation and dehiscence of the cortical plate. 6,9,10,12,15 In this context, it is interesting to note that the incidence of orthodontic root resorption is by far more frequent in the maxillary central incisors, even with their larger tooth dimensions, than in the lateral incisors. 14,35 Considering the morphologic dimensions of the central incisor roots and the incisive canal, the posterior-median aspect of the apical third (L1 or L2 levels) of the roots rather than the root apex per se is most likely to approximate with the canal following maxillary anterior retraction and root movement.…”

“…[6][7][8][9][10] Ackerman and Proffit introduced the concept of the "envelope of discrepancy," which graphically shows the extent of changes possible with orthodontic tooth movement alone, with orthopedic or functional appliance therapy for growth modification, and with orthognathic surgery in combination with orthodontic treatment. 7,11 Accordingly, it is traditionally thought that the amount of changes possible for the maxillary incisors with orthodontic treatment alone are approximately 7, 2, 4, and 2 mm for retraction, protraction, extrusion, and intrusion, respectively.…”

Long-term follow-up of dental single implants under immediate orthodontic load

“…[16][17][18] The magnitude of force applied was the same described by several authors as being secure. 2,5,[19][20][21][22][23][24][25][26][27] Moreover, a 200 g force is considered appropriate to various orthodontic movements and potentially safe. In this study, the handles of two dental mirrors were used to evaluate whether there was absence of implant mobility.…”

La recherche de l’excellence en orthodontie de l’adulte : entretien avec Bjørn U. Zachrisson

“…Ainsi, un développement sinusien plus vertical avec un prolongement profond favoriseront un degré plus important de version. Des rapports récents ont montré que déplacer une dent à travers le sinus maxillaire est possible, sous réserve d'un très bon contrôle du mouvement de cette dent [22,26]. Un implant peut, par la suite, être posé dans le site préalablement occupé par la dent ainsi déplacée.…”