Effectiveness of anchorage with temporary anchorage devices during anterior maxillary tooth retraction: A randomized clinical trial

Abstract

ObjectiveThis study evaluated the efficiency of anchorage provided by temporary anchorage devices (TADs) in maxillary bicuspid extraction cases during retraction of the anterior teeth using a fixed appliance.MethodsPatients aged 12 to 50 years with malocclusion for which bilateral first or second maxillary bicuspid extractions were indicated were included in the study and randomly allocated to the TAD or control groups. Retraction of the anterior teeth was achieved using skeletal anchorage in the TAD group and conventional dental anchorage in the control group. A computed tomography (CT) scan was performed after alignment of teeth, and a second CT scan was performed at the end of extraction space closure in both groups. A three-dimensional superimposition was performed to visualize and quantify the maxillary first molar movement during the retraction phase, which was the primary outcome, and the stability of TAD movement, which served as the secondary outcome.ResultsThirty-four patients (17 in each group) underwent the final analysis. The two groups showed a significant difference in the movement of the first maxillary molars, with less significant anchorage loss in the TAD group than that in the control group. In addition, TAD movement showed only a slight mesial movement on the labial side. On the palatal side, the mesial TAD movement was greater.ConclusionsIn comparison with conventional dental anchorage, TADs can be considered an efficient source of anchorage during retraction of maxillary anterior teeth. TADs remain stable when correctly placed in the bone during the anterior tooth retraction phase.

Key Factors Contributing to the Anchorage Loss of Maxillary First Molars: A Retrospective Study of 726 Extraction Cases

“…One of the key components of orthodontic treatment is anchorage control. Many studies focused on linear change instead of on tipping movement of molars [14,15]; however, during orthodontic treatment, crown movement surpasses root movement in speed and extent, signifying the initiation of anchorage loss. Molar mesialization almost always accompanies forward tipping, in other words, mesial tipping is closely related to anchorage loss.…”

<p>Mini implant orthodontic sebagai penjangkaran pada perawatan maloklusi kelas II skeletal dengan protrusi berat</p><p>Mini implant orthodontic as an anchorage in skeletal class II maloclussion with severe dental protrusion</p>

“…Mini implant orthodontic diketahui mampu memberikan penjangkaran yang stabil dan mencegah terjadinya anchorage loss pada fase penutupan ruang ekstraksi karena gigi posterior terbebas dari gaya dan momen yang terjadi. 6,9,10 Dilakukan retraksi anterior en masse dengan mekanika sliding menggunakan power chain ke piranti penjangkaran setelah tahap leveling dan aligning pada rahang atas selesai (Gambar 4). Mini implant orthodontic dapat digunakan sebagai penjangkaran langsung pada mekanisme penutupan ruang secara sliding mechanic 11,12 maupun non sliding mechanic.…”

Space closure by miniscrew-assisted mesialization of an upper third molar and partial vestibular fixed appliance: A case report

“…However, several authors have demonstrated the efficacy of sectional appliances in conjunction with TADs in managing complex post-extraction space closure in the posterior sectors, stating that such an approach meets the demands of adult patients to be treated efficiently, aesthetically (without bulky, visible equipment), and with reduced need for compliance [10,11]. Although TADs cannot be considered entirely immovable during either the direct or indirect application of orthodontic forces [12], they certainly provide an adequate and satisfactory reinforcement of the anchorage [13] and these remain stable when correctly placed in the bone during tooth retraction and protraction phase [14]. The aim of this paper is to highlight how the careful use of skeletal anchorage and appropriate orthodontic biomechanics can yield satisfactory results in a reduced treatment time, even in complex cases.…”