Dentoalveolar comparative study between removable and fixed cribs, associated to chincup, in anterior open bite treatment

Abstract

ObjectiveThe aim of this prospective study was to compare the dentoalveolar effects produced by two types of palatal crib, removable (Rpc+C) and fixed (Fpc+C), combined with chincup in growing patients with anterior open bite.Material and MethodsEach group comprised 30 patients, in the mixed dentition phase, with similar cephalometric characteristics and skeletal ages. Group 1 (Rpc+C) presented initial mean age of 8.3 years and mean anterior open bite of 4.0 mm. Group 2 (Fpc+C) presented initial mean age of 8.54 years and mean anterior open bite of 4.3 mm. The evaluation period comprised 12 months between initial (T1) and second lateral radiograph (T2). The T2-T1 changes were compared cephalometrically in the 2 groups using the non-paired t-test.ResultsVertical changes in the posterior dentoalveolar region were similar between the groups (about 1 mm) and no significant differences were found in molar mesialization. The Fpc+C group had in average 1.6 mm more improvement of the overbite as a result of greater maxillary incisor extrusion (1.3 mm). Patients in this group also presented less lingual tipping of maxillary incisors and more mandibular incisors uprighting. ConclusionsThe Fpc+C combination was more efficient in the correction of the negative overbite mainly due to greater extrusion of the maxillary incisors. However, the Rpc+C appliance promoted better upper and lower incisor inclination, resulting in a more adequate overjet.

Dimensional changes of dental arches produced by fixed and removable palatal cribs: A prospective, randomized, controlled study

“…7,13,30 However, comparison of differences between groups (T2-T1) reveals a statistically significant difference in overjet, by a reduction for the RPC (À0.40 mm) and an increase for the FPC (0.56 mm). Torres et al 4 obtained similar results when comparing overjet between RPC (À0.75 mm) and FPC (0.40 mm). The differences found in overjet between the two groups may be related to a modification in the perioral and lingual muscle balance and appliance design, as the RPC had a labial arch over the upper incisors that could contact these teeth.…”

“…3 A vertical facial growth pattern has also been implicated. 4 Although many therapeutic interventions for American Board of Orthodontics have been presented in the literature, 5,6 there seem to be no data describing the three-dimensional (3D) changes in maxilla and mandible caused by the application of these methods during the mixed dentition stage. It is important to intercept deleterious oral habits, and fixed and removable palatal cribs (RPCs) may be used as recall devices in the mixed dentition stage.…”

“…It is important to intercept deleterious oral habits, and fixed and removable palatal cribs (RPCs) may be used as recall devices in the mixed dentition stage. [4][5][6] Several studies 4,[7][8][9][10][11][12][13] have been performed to assess the effectiveness of both fixed palatal crib (FPC) and RPC, reporting their posttreatment effects through measurements performed on cephalograms or manually on cast models. Villa and Cisneros 7 observed, in cast models, the dental changes in patients with digital sucking managed with a palatal crib.…”

Three-dimensional evaluation of soft tissue changes after fixed palatal crib application in anterior open-bite cases

“…Torres ve ark. 34 da çalışmaları sonucunda dil paravanı apareyinin kronik parmak emme alışkanlığının ortadan kaldırılmasında oldukça etkili bir aygıt olduğunu bildirmişlerdir. Haryett ve arkadaşları9 ise dil paravanı ile parmak emme alışkanlığının ortadan kaldırılması için ortalama tedavi süresinin 6-10 ay olması gerektiğini bildirmiştir.…”

“…Çalışmamız-da nazolabial açıdaki artışın ve TVL-üst dudak açısında meydana gelen azalmanın üst keser dişlerde meydana gelen retroklinasyon ile ilişki olduğu düşünülmektedir. 34 Ayrıca çalışmamızda üst dudak uzunluğundaki anlamlı artış, üst kesici dişlerin retroklinasyonu ve dolayısıyla desteği azalan üst dudağın uzaması şeklide yorumlanmıştır. 37 Benzer şekilde Talass ve arkadaşlarının çalışmasında da üst kesici dişlerin retroklinasyonu ile nazolabial açı, alt ve üst dudak uzunluğu artışı bildirilmiştir.…”