Long-term 3-dimensional stability of mandibular advancement surgery.

Purpose: To evaluate 3-dimensional changes in the position of the condyles, rami, and chin from 1 to 3 years after mandibular advancement surgery.

Materials And Methods: This prospective observational study used pre- and postoperative cone-beam computed tomograms of 27 subjects with skeletal Class II jaw relation and normal or deep overbite. An automatic technique of cranial base superimposition was used to assess positional and bone remodeling changes that were visually displayed and quantified using 3-dimensional color maps.

Dental crowding: the role of genetics and tooth wear.

Objective: To evaluate the role of genetics and tooth wear in the etiology of dental crowding through the analysis of a split indigenous Amazon population.

Materials And Methods: Dental crowding prevalence (n  =  117), tooth wear (n  =  117), and inbreeding coefficient (n  =  288) were compared for both villages. A biometric investigation was performed by dental cast analysis of 55 individuals with no tooth loss.

Three-dimensional regional displacements after mandibular advancement surgery: one year of follow-up.

Purpose: To evaluate the association of 3-dimensional changes in the position of the condyles, rami, and chin at splint removal and 1 year after mandibular advancement surgery.

Patients And Methods: This prospective observational study used preoperative and postoperative scans of 27 subjects presenting with a skeletal Class II jaw relationship with a normal or deep overbite. An automatic technique of cranial base superimposition was used to assess the positional and/or remodeling changes in the anatomic regions of interest.

Primer on the base of polycarbonate brackets: should we apply it or not?

Objective: The purpose of this study was to evaluate shear bond strength of polycarbonate brackets bonded with or without the previous application of primer on their bases.

Materials And Methods: Forty-six extracted bovine permanent mandibular incisors were obtained and randomly divided into two groups of 23 each: group 1 (control), 37% phosphoric acid and direct bonding with Orthoprimer (Morelli Orthodontic Products, São Paulo, Brazil) and Orthobond (Morelli Orthodontic Products); and group 2, Orthoprimer application on bracket base prior to conventional bonding. Polycarbonate maxillary central incisor brackets (Composite, Morelli Orthodontic Products) were used in this study.

Orthodontic management of a patient with impacted and transposed mandibular canines.

This patient report describes the treatment of a 10-year-old female with complete transposition of her impacted mandibular canines and lateral incisors. The patient had a Class I occlusion, and her mandibular lateral incisors were in crossbite with the maxillary central incisors. The treatment objectives were to create space for the impacted canines and align them with the incisors, one of which was extracted.

Soft tissue facial profile changes following functional appliance therapy.

The aim of this study was to evaluate changes in the facial profile resulting from the use of a twin block (TB) functional appliance. The sample comprised 38 patients (24 males and 14 females) with a Class II division 1 malocclusion. Nineteen subjects were treated with a functional appliance while the remaining 19, who did not undergo any intervention, served as the control.