In vitro enamel surface roughness analysis of 4 methods for removal of remaining orthodontic adhesive after bracket debonding.

Objectives: To perform an in vitro qualitative and quantitative evaluation of the enamel surface (by scanning electronic microscopy [SEM] and measuring polishing time and roughness analysis, respectively) among four methods to remove remaining orthodontic adhesive after bracket debonding.

Materials And Methods: Forty-one human premolars were randomly divided into four groups (n = 10) according to the adhesive remnant removal method and one tooth was used as control: Group 1 (G1): Enhance (Dentsply, Milford, USA); Group 2 (G2): Fiberglass (TDV, Pomerode, Brazil); Group 3 (G3): DU10CA-Ortho (Dian Fong Industrial, Shenzhen, China); Group 4 (G4): Sof-Lex Pop-On (3M ESPE, Seefeld, Germany). Roughness was measured before bonding and after complete removal of the remaining adhesive (Ra2).

A 3-D evaluation of transverse dentoalveolar changes and maxillary first molar root length after rapid or slow maxillary expansion in children.

Objective: The objective of the present study was to conduct a randomized clinical trial comparing the effects of rapid maxillary expansion (RME) and slow maxillary expansion (SME). Maxillary permanent first molar root length and tooth movement through the alveolus were studied using cone-beam computed tomography (CBCT).

Methods: Subjects with maxillary transverse deficiencies between 7 and 10 years of age were included.

Evaluation of the rapid and slow maxillary expansion using cone-beam computed tomography: a randomized clinical trial.

Objective:: The aim of this randomized clinical trial was to evaluate the dental, dentoalveolar, and skeletal changes occurring right after the rapid maxillary expansion (RME) and slow maxillary expansion (SME) treatment using Haas-type expander.

Methods:: All subjects performed cone-beam computed tomography (CBCT) before installation of expanders (T1) and right after screw stabilization (T2). Patients who did not follow the research parameters were excluded.

Understanding the basis of space closure in Orthodontics for a more efficient orthodontic treatment.

Introduction: Space closure is one of the most challenging processes in Orthodontics and requires a solid comprehension of biomechanics in order to avoid undesirable side effects. Understanding the biomechanical basis of space closure better enables clinicians to determine anchorage and treatment options. In spite of the variety of appliance designs, space closure can be performed by means of friction or frictionless mechanics, and each technique has its advantages and disadvantages.

An interview with Peter H. Buschang.

Dr. Peter Buschang is regent professor and director of orthodontic research. He has been at Texas A&M University Baylor College of Dentistry since 1988.

Three-dimensional assessment of buccal alveolar bone after rapid and slow maxillary expansion: a clinical trial study.

Introduction: The purposes of this study were to analyze and compare the immediate effects of rapid and slow maxillary expansion protocols, accomplished by Haas-type palatal expanders activated in different frequencies of activation on the positioning of the maxillary first permanent molars and on the buccal alveolar bones of these teeth with cone-beam computerized tomography.

Methods: The sample consisted of 33 children (18 girls, 15 boys; mean age, 9 years) randomly distributed into 2 groups: rapid maxillary expansion (n = 17) and slow maxillary expansion (n = 16). Patients in the rapid maxillary expansion group received 2 turns of activation (0.

Palatal expansion in a patient with solitary median maxillary central incisor syndrome.

The objective of this article was to report a clinical case of a patient with solitary median maxillary central incisor syndrome. He was treated with rapid maxillary expansion and evaluated with computed tomography. The boy, aged 6 years 7 months, had a single maxillary central incisor in the midline, posterior crossbite, prominent midpalatal ridge, indistinct philtrum, no incisive papilla, and no labial frenulum.

Multiloop edgewise archwire in the treatment of a patient with an anterior open bite and a long face.

An adolescent girl with an Angle Class III malocclusion, excessive lower facial height, and anterior open bite sought nonsurgical treatment. She was treated with a multiloop edgewise archwire (MEAW). In association with a chincup, MEAW mechanics allowed the successful correction of the anterior open bite and the molar relationship, without major alterations of the patient's profile.

Solitary median maxillary central incisor.

Solitary median maxillary central incisor syndrome (SMMCIS) is a rare abnormality characterized by the presence of a central incisor positioned at the maxillary mid-axis. This morphologic defect also can be associated with other diseases. The purpose of this paper was to present a case report of a 4-year-old twin child with SMMCIS.

The dilemma of the open gingival embrasure between maxillary central incisors.

Aim: The aim of this report is to present the etiology, diagnosis, and treatment planning strategy in the presence of an open gingival embrasure between the maxillary central incisors.

Background: The open gingival embrasure or "black triangle" is a visible triangular space in the cervical region of the maxillary incisors. It appears when the gingival papilla does not completely fill in the interdental space.

Palatal expansion and the Klippel-Trénaunay-Weber syndrome.

A girl (aged 8.5 years) with Klippel-Trénaunay-Weber syndrome received orthodontic treatment that included rapid palatal expansion. The patient had early and complete intraoral dental eruption with a posterior crossbite and an expressive transverse atresic maxilla.