Comparison of labial corticotomy vs palatal corticotomy during en masse retraction with mini screws as anchorage units

Abstract

Aim:Aim: Aim: Aim: The aim of this study was to evaluate and compare the treatment effects and duration of en-masse retraction combined with labial corticotomy and that with palatal corticotomy using miniscrews as source of anchorage. Methods:Methods: Methods: Methods: Twenty adult patients with bimaxillary or maxillary protrusion requiring orthodontic treatment with upper anterior retraction in the extraction space of first premolars were selected. Patients were divided into two groups; labial corticotomy gruop and palatal corticotomy group, each group consisted of 10 subjects. The retraction time was estimated. Cephalometric radiographs were taken before treatment (T1) and after treatment (T2). Results: Results: Results: Results: There was no significant difference in retraction time between labial and palatal corticotomy groups. Radiographic evaluation showed significant maxillary incisor retraction. Conclusion: Conclusion: Conclusion: Conclusion: The use of corticotomy technique from labial side only could be beneficial for adult patients with difficult surgical access from the palatal side.

Use of direct miniplate anchorage in conjugation with Forsus Fatigue Resistant device in class II growing females: a randomized controlled trial

“…For group I, the results of the current study showed that the time needed for extraction space closure was in agreement with El Gemeay et al, (12) and Wilcko et al, (24) for the upper arch. The results of the lower arch in this study matched those of Lino et al, (6) who declared that en-masse retraction of the lower arch could be achieved in 7 months while Khatri el al., (11) reported space closure time of 6 months after corticotomy which could be attributed to the difference in anchorage preservation method.…”

“…Corticotomy assisted en-masse retraction was evaluated in previous studies. (9)(10)(11)(12) It was found that the rate of retraction was accelerated in the first two months after corticotomy. (9,11) A significant reduction in retraction time after first premolar extraction was reported when a corticotomy group was compared to a control one.…”

“…(10) Another study advocated the use of single side corticotomy as no significant difference in retraction time was found when buccal and palatal corticotomy were compared. (12) In an attempt to decrease surgical invasion, piezocision was introduced as a minimally invasive surgical technique that used a piezosurgery knife to produce cortical alveolar incisions through microincisions in the periosteum. Piezocision was suggested for rapid correction of patients with Class II malocclusion.…”