Occlusal contact changes in patients treated with clear aligners: A retrospective evaluation using digital dental models.

Introduction: This study used digital intraoral scans to evaluate how clear aligner treatment affects occlusal contacts and to determine the influence of sex and age on contact changes. Results were compared with contact changes that occur during fixed appliance therapy.

Methods: Patients included in this study were treated in a University setting and private practice.

Association between crowding estimation and extraction recommendations in orthodontics.

Introduction: Little is known about how precisely orthodontists in the United States (US) assess crowding or at what range of crowding they recommend extraction. This study aimed to assess the relationship between estimated crowding in patients with a Class I relationship and extraction recommendation by orthodontists in the US. The secondary aims were to evaluate the accuracy and precision of clinician estimations and determine if clinician background traits play a role in extraction decision-making.

Effect of birth season on anthropometrics and diseases of bone mineralization in the US population.

Objectives: Birth season has been inconsistently associated with anthropometrics, bone fractures, and malocclusion. Our aim was to assess the association between birth season and anthropometrics (height, weight, birth weight), bone fractures and dental malocclusion in the United States.

Methods: US surveys conducted between 1963-1973 assessed 16 152 6-to-21-year-old participants.

The influence of labiolingual and mesiodistal anterior tooth dimensions on interarch relationships: A modified anterior Bolton analysis.

Introduction: Tooth size and morphology of anterior teeth influence interarch relationships. The Bolton analysis uses tooth width to calculate a sum of mandibular to maxillary tooth width ratios necessary for proper occlusion. Several parameters not factored in the Bolton analysis influence occlusion, such as tooth thickness.

Influence of clinicians' experience and gender on extraction decision in orthodontics.

Objective: To determine whether, in Class I borderline cases, experienced orthodontists choose nonextraction treatment more frequently than do orthodontists with less experience. A secondary aim was to evaluate whether clinicians' gender and place of education play a role in extraction decision making.

Materials And Methods: An online survey was developed using three Class I borderline patient cases.

Assessing the feasibility of yttria-stabilized zirconia in novel designs as mandibular anterior fixed lingual retention after orthodontic treatment.

Introduction: The purpose of this study is to explore the feasibility of yttria-stabilized zirconia (Y-TZP) in fixed lingual retention as an alternative to stainless steel.

Methods: Exploratory Y-TZP specimens were milled to establish design parameters. Next, the specimens were milled according to ASTM standard C1161-13 and subjected to 4-point flexural tests to determine material properties.

Stability of deep-bite correction: A systematic review.

Objectives: Deep bite occurs in about 15% to 20% of the US population. Currently, it is unknown which types of correction are most efficient or stable. The purpose of this systematic review was to investigate factors related to stability of deep-bite correction.

External apical root resorption in patients treated by serial extractions followed by mechanotherapy.

Introduction: In the course of orthodontic treatment with serial extractions (SE), spontaneous unraveling of crowded incisors occurs. It was hypothesized that SE followed by mechanotherapy will cause less external apical root resorption (EARR) than orthodontic treatment with late extractions (LE).

Methods: The records of 24 patients who underwent SE and mechanotherapy and 24 control patients who underwent LE and mechanotherapy were examined.

Bone volume, tooth volume, and incisor relapse: a 3-dimensional analysis of orthodontic stability.

Introduction: Orthodontic relapse is a common and significant problem. Few risk factors have been identified, and the role of bone has only recently been investigated. The purpose of this study was to examine the influence of alveolar bone volume and tooth volume on dental relapse.

Interceptive orthodontic treatment improves malocclusions over no treatment, but does not produce finished-quality results.

Article Title And Bibliographic Information: Effectiveness of interceptive orthodontic treatment in reducing malocclusions. King GJ, Brudvik P. Am J Orthod Dentofacial Orthop 2010;137:18-25.

Relapse of mandibular incisor alignment is not associated with the total posttreatment mandibular rotation.

Introduction: Our objective was to determine whether total posttreatment mandibular rotation is associated with mandibular incisor crowding after retention.

Methods: Mandibular incisor irregularity (II) at least 10 years out of retention (T3) measured on dental casts from the postretention database at the University of Washington in Seattle was used to define subjects (II ≥6 mm, relapse group) and controls (II ≤3.5 mm, stable group).

Effectiveness of the cervical vertebral maturation method to predict postpeak circumpubertal growth of craniofacial structures.

Introduction: Our aim was to assess effectiveness of the cervical vertebral maturation (CVM) method to predict circumpubertal craniofacial growth in the postpeak period.

Methods: The CVM stage was determined in 176 subjects (51 adolescent boys and 125 adolescent girls) on cephalograms taken at the end of treatment (T2; mean ages, 15.75 years [boys] and 15.

Treatment response and stability of slow maxillary expansion using Haas, hyrax, and quad-helix appliances: a retrospective study.

Introduction: In this retrospective study, we evaluated the short- and long-term effects of slow maxillary expansion with Haas, hyrax, and quad-helix appliances on posterior crossbite (PXB) correction stability, and maxillary intermolar width and angulation, in the deciduous or early mixed dentition.

Methods: The inclusion criteria were models and treatment notes of patients with PXB at the start of treatment (T1), after PXB correction (T2), and at least 2 years posttreatment (T3). Exclusion criteria were craniofacial anomalies, fixed appliance use, or more than 1 expander type.

Effects of malocclusions and orthodontics on periodontal health: evidence from a systematic review.

Many patients seek orthodontic treatment for esthetic improvement. These patients mostly present with mal-alignment of the anterior teeth. The positive effects of orthodontic treatment on their appearance and self-esteem are easy to envision.

Effects of posttreatment skeletal maturity measured with the cervical vertebral maturation method on incisor alignment relapse.

Introduction: Our aim was to test the hypothesis that relapse of incisor alignment is associated with skeletal maturity at the end of treatment, as assessed with the cervical vertebral maturation (CVM) method.

Methods: This was a case-control study with information from the postretention database at the University of Washington. Mandibular incisor irregularity (II) at least 10 years out of retention (T3) was used to define the subjects (II >6 mm, relapse group) and the controls (II <3.

Activation time and material stiffness of sequential removable orthodontic appliances. Part 3: premolar extraction patients.

Introduction: The purpose of this study was to describe the movement of teeth adjacent to premolar extraction spaces during space closure with aligner appliances and then fixed appliances.

Methods: The sample included 24 subjects from a larger study investigating an aligner system. All subjects had at least 1 premolar extracted as part of treatment.

The effects of orthodontic therapy on periodontal health: a systematic review of controlled evidence.

Background: Orthodontic therapy has been suggested to lead to an improved periodontal status through mechanisms such as increased ease of plaque removal and reduced occlusal trauma. The objective of the authors' systematic review was to compare contemporary orthodontic treatment with no intervention, by means of evaluating periodontal outcomes measured after end of treatment.

Methods: The authors completed electronic searches in eight databases (1980-2006) and hand searches in six dental journals (1980-2006).

Head-and-neck organ doses from an episode of orthodontic care.

Introduction: The high prevalence of orthodontic treatment in young people makes the associated radiation to the head and neck of potential public-health significance. In this study, we estimated secular changes (1963-2003) in age-specific organ doses associated with orthodontic care and collective organ doses in the United States in 1999.

Methods: A survey of radiographic records at 1 university clinic was combined with published estimates to provide organ-specific radiation doses.