Maxillary Canine-First Premolar Transposition in the Permanent Dentition

Abstract

Maxillary canine premolar transposition is the most frequently reported transposition type, which many orthodontists face. Although correcting the transposed tooth order is not advised after the eruption of the permanent tooth, several articles published in the last decade demonstrated nonextraction treatment of transposition using fixed mechanics. This article describes the nonextraction treatment of a complete transposition between a maxillary left canine and a first premolar, using similar mechanics as suggested earlier. The correct tooth order was established with a functional Class I canine and molar relationship at the end of treatment. Although triangular cortical bone resorption at the vestibule of the canine root was detected on computed tomography at the end of treatment, spontaneous regeneration of bone tissue at the resorption area was present on the postretention computed tomography scan.

Maxillary canine transposition – A literature review with case report

“…Age is the noticeable factor beyond the factors listed above, which is directly correlated with the tissue regeneration. 28 In the present case, there is a possibility that lateral incisor agenesis was responsible for medial deviation of the left canine. This in turn led to the eruption of the permanent canine in place of permanent lateral incisor and also persistence of the primary canine.…”

Canine-lateral incisor transposition: Controlling root resorption with a bone-anchored T-loop retraction

“…It was important for the transposed canine to be adequately exposed for bonding and retraction, but its high position in the vestibular fold was an additional advantage. Babacan et al 27 prefers to avoid correcting transposed teeth in the permanent dentition, because of the potential risk of damaging teeth and/or supporting structures. Maia 31 favors early treatment to decrease the risk to the dentition and supporting tissues.…”

“…27 A T-loop is controlled by the load-deflection rate of the spring, position of the activation bends, amount of T-loop activation, and the position of the loop relative to the inter-bracket distance. The clinical use of a T-loop with osseous anchorage simplifies the reactive mechanics, and also increases the distance between the anchorage screw and the bracket on the transposed canine.…”

Non-Extraction Fixed Orthodontic Treatment Approach of Maxillary Lateral Incisor-Canine Transposition: Case Report

“…Literatürde transpoze dişlerin farklı mekaniklerle kendi anatomik konumlarına alındığı vakaların tedavi süreleri incelendiğinde ise olguyaait aktif tedavi süresinin alt sınıra yakın olduğu gö-rülmüştür (2 yıl 11 ay, 3 yıl 8 ay, 3 yıl 9 ay, 4 yıl, 4 yıl 9 ay, 5 yıl 5 ay). 4,6,10,12,15,16 Transpoze dişlerin kök ve çevre periodontal yapılarında oluşabilen patolojiler diş transpozisyonlarının ortodontik tedavisinde karşılaşılabile-cek temel problemler olarak görülmektedir. 10,15,16 Tedavi sonunda alınan panoramik ve periapikal radyografiler incelendiğinde üst çene lateral kesici ve kanin dişlerinin köklerinde ve çevre periodontal dokularda herhangi bir patolojik duruma rastlanmamıştır.…”

“…Tedavi başında ise transpoze dişle-rin kök ucu pozisyonu ve gelişim dönemi, diş morfolojisi, fasial estetik ve çevresindeki kemik dokusu ayrıca incelenmelidir. 3,4,10,12,13 Diş transpozisyon vakalarının ortodontik tedavisinde farklı seçenekler bulunmaktadır. Bu tedavi seçeneklerini, altı sekiz yaş grubunda gelişen diş transpozisyonunun erken teşhisinde uygulanabilen koruyucu tedaviler, transpoze dişlerin ortodontik diş hareketleriyle birlikte diş arkındaki doğru anatomik pozisyonlarına getirilmesi 3,4,6,[13][14][15][16] ve etkilenen dişlerin transpoze konumlarında bı-rakılarak ortodontik tedavi sonrasında konservatif restorasyonlarla kronlarının yeniden şekillendirilmesi oluşturmaktadır.…”