American Journal of Orthodontics and Dentofacial Orthopedics

This trial aimed to longitudinally evaluate the effect of the treatment of transverse maxillary deficiency using rapid palatal expansion (RPE) on self-perceived oral health–related quality of life (OHRQOL) in children.

Generally, a canted occlusal plane results in esthetic problems, such as an asymmetric mandible with midline deviation, and functional problems, such as temporomandibular disorder (TMD). For many years, orthognathic surgery has been used to level a canted occlusal plane. However, similar effects might be achieved by intruding the posterior teeth using a miniscrew. This case report describes a patient with a canted occlusal plane, mandibular deviation, shifted dental midlines, and TMD treated with an edgewise appliance using miniscrews as anchorage.

Digital scanning, treatment planning, 3-dimensional imaging, and printing are changing the practice of orthodontics. These tools are adopted with the hope that treatment becomes more predictable, efficient, and effective while reducing adverse outcomes. Digital tools are impacting care, but knowledge of nationwide adoption trends and motivators is incomplete.

This case report describes the successful orthodontic treatment of a 12-year-old girl with skeletal Class III malocclusion and severe root resorption of the maxillary anterior teeth. Ectopic eruption and mesial inclination of the bilateral maxillary canines caused severe root resorption of the right central and lateral incisors and the left lateral incisor. These 3 teeth were extracted, and traction was applied to the maxillary right and left canines toward the extracted right central incisor and left lateral incisor, respectively.

Patients with dental crowding, even with good oral hygiene, may show increased bacterial presence in the crowded area. This study aimed to determine the microbial composition of subgingival plaque in crowded and noncrowded dental regions.

This study aimed to investigate the esthetic impact of mandibular crowding and maxillary midline diastema in children in the mixed dentition.

Superimpositions of 3-dimensional photographs enable a thorough and risk-free assessment of facial changes over time. However, the available methods and the evidence supporting them have not been assessed systematically. The paper summarizes and assesses the current evidence on superimposition methods of serial 3-dimensional facial photographs available in the literature.

Applying root torque using conventional methods (rectangular wire) has side effects such as inverse and destructive forces, undesirable torque on adjacent teeth, heavy forces that are limited in range and duration, and needing too many sessions. We introduce a new method (a horizontal box loop [HBL]) that is designed to reduce many of these side effects; we tested its efficiency and side effects using finite element analysis.

This retrospective study aimed to evaluate whether there are differences in the duration of treatment and the quality of treatment results between patients whose entire treatment process is carried out by a single operator and those patients who are transferred to a second operator.

“Everything is easy when we know it.” These words, so often cited by Dr Guilherme Janson, explain his motivation, dedication, and hard work. His persistence in clarifying the difficulties and challenges of clinical orthodontics led him to work inexhaustibly on ideas and research hypotheses. With his clear interpretation of clinical reasoning, he was objective and logical when interpreting scientific outcomes. He pursued an uninterrupted line of work, authoring >500 papers and 4 orthodontic books and supervising 48 Master's degree and 28 Doctor of Philosophy degree students at Bauru Dental School, University of São Paulo.

Parathyroid hormone (PTH) potentiates the mechanical loading induced bone formation in fracture healing and orthodontics. This study aimed to gain insight into the underlying mechanisms in periodontal ligament fibroblasts (PDLFs).

The aim of this 2-arm-parallel, split-mouth trial was to investigate the effects of piezocision compared with no piezocision on maxillary canine distalization and to evaluate patient perceptions on the surgical procedure.

The objectives were to evaluate the morphologic changes of the incisive canal (IC) and the influence of IC proximity to apical root resorption of maxillary central incisors after anterior tooth movement.

A request was submitted to the American Association of Orthodontists Foundation Rapid Assessment of Evidence (AAOF-RAE) Panel regarding claims by SmileSonica Inc, Edmonton, Alberta, Canada, on their product, the Aevo System. The request stated that the company was using “Pseudoscience with claims not supported by the data published in a predatory journal.” The RAE Panel investigated evidence related to the claims of the manufacturer and the status of the journal in which evidence, cited in support of the Aevo System, had been published.

Balanced facial proportions and hard tissue relationships are important factors in facial attractiveness. The objective of this study was to determine the most pleasing maxillary incisal inclination (MII) on the lateral profile and the impact of various lower anterior facial height (LAFH) ratios (at rest and with a smile) on facial attractiveness.

Insertion torque is the amount of torque exerted on the implant to tighten into the bone. We investigated whether insertion torque values could be correlated with the strain level in the peri-implant cortical bone resulting from mini-implant insertion.

The midface and nasal bones have a significant influence on facial esthetics. Being able to predict the ultimate size of a growing patient's nose may influence the orthodontic treatment plan. Our study aimed to determine whether significant heritability exists between parents and children using multiple soft and hard tissue measurements of nasal dimensions.

The use of aligner therapy for orthodontic treatment has increased substantially in the past decade. However, no study has compared treatment outcomes between the conventional fixed appliance and Invisalign therapies in patients with a severe deep overbite.

The purpose of this study was to determine if written rehearsal of informed consent improved 6-month recall and comprehension compared with the current best practices.

This study aimed to investigate the immediate impact and long-term implications of severe acute respiratory syndrome coronavirus on orthodontic practices in the United States in 2020.

The objective of this research was to evaluate and compare linear and surface accuracy of dental models fabricated using 3 different vat photopolymerization printing units: digital light synthesis (M2 Printer; Carbon, Redwood City, Calif), digital light processing (Juell 3D Flash OC; Park Dental Research, New York, NY), and stereolithography apparatus (Form 2; Formlabs Inc, Somerville, Mass), and a material jetting printing unit: PolyJet (Objet Eden 260VS; Stratasys, Eden Prairie, Minn).

You are being sued for malpractice. The plaintiff said your treatment was negligent and caused significant injury. There is no claim for lack of informed consent. At trial, your defense attorney wants to present evidence that informed consent was given for the procedure and the known risks of the procedure. Obviously, the plaintiff objects and wants the court to preclude the admission of any such evidence because informed consent is not on the menu, only the claim for negligence. Can the information be entered into evidence and considered by the jury? Such is the making of Mitchell v Shikora, No.

Modeling missing participant outcome data (MOD) in a meta-analysis has been advocated as conceptually and statistically advantageous to methods that manipulate the data before analysis by imputing or excluding MOD.1 In this column, we introduce the pattern-mixture model for an aggregate binary outcome. We also provide recommendations to handle MOD in meta-analysis properly.

Regarding the recent article by Jiang et al in the May issue of American Journal of Orthodontics and Dentofacial Orthopedics (Jiang T, Jiang YN, Chu FT, Lu PJ, Tang GH. A cone-beam computed tomographic study evaluating the efficacy of incisor movement with clear aligners: Assessment of incisor pure tipping, controlled tipping, translation, and torque Am J Orthod Dentofacial Orthop 2021;159:635-43), we would like to congratulate the authors on their interesting study and also raise a few questions.

A dentist who is among your strongest advocates referred Cindy to you to upright her mandibular right second molar before implant replacement of the adjacent first molar. Try as you might, you are having difficulty controlling the extrusion of the tooth as it moves. The second molar is restored with a crown, so you explain to Cindy that you’ll reduce the crown to prevent traumatic occlusion and facilitate movement. You realize you’ve perforated the crown soon after you start your handpiece. Fortunately, the tooth had been endodontically treated, so Cindy has no idea of what happened.

We read with great interest the case report by Pinho et al presenting a successful correction of skeletal open bite by miniscrew-assisted mandibular molar intrusion. (Pinho T, Santos M. Skeletal open bite treated with clear aligners and miniscrews. Am J Orthod Dentofacial Orthop 2021;159:224-33). We appreciated the case report, but we have a concern about possible inferior alveolar nerve (IAN) injury after molar intrusion, considering the molar roots in proximity to the IAN canal.

We appreciate the interest and insightful comments on our article.

Humans do not intuitively think in statistical terms and the brain tends to leap from specific information to general conclusions. Once a theory is formulated, we (eg, surgeons, orthodontists, scientists, professors, and students, etc) attempt to align the available evidence with the theory rather than test the hypothesis against existing facts. It is often easier to accept an unproven but perhaps popular or comfortable theory rather than implement change.

Thank you for taking an interest in our article and for your pertinent comments.

This study aimed to compare the 2 most commonly used methods for assessing facial pleasantness, the Likert scale and the visual analog scale (VAS).

Several imaging software packages report the ability to measure the oropharynx and minimum cross-sectional area (MCA). This study aimed to compare 4 imaging software packages for measuring the oropharynx volume and MCA.

Patients with neurodevelopmental disabilities often experience barriers to dental care. Despite greater access to orthodontic treatment, information about the perceptions of patients with neurodevelopmental disabilities regarding orthodontic care remains scarce. The objective of this research was to investigate perceptions of patients, caretakers, and orthodontic residents regarding the barriers to and facilitators of orthodontic care for patients with neurodevelopmental disabilities.

Winged maxillary central incisors (WMCI), defined as mesiopalatal rotation of the crowns of maxillary central incisors, is a common dental trait that affects smile esthetics. This retrospective study aimed to determine the efficacy of rotation and uprighting tooth movements of bilateral WMCI with Invisalign (Align Technology, Santa Clara, Calif).

This research aimed to assess qualitatively and quantitatively the overall stress in the periodontal ligament during gradual periodontal breakdown (0-8 mm) under orthodontic movements. Correlations between the applied forces, the level of bone loss, the decrease of force magnitude, and the increase of stress were also assessed.

Identifying the stage of midpalatal suture (MPS) fusion is essential for rapid maxillary expansion (RME). The objective of this study was to evaluate the relationship between MPS density ratio and the skeletal response after RME using cone-beam computed tomography (CBCT).

Referrals from general dentists are a significant source of orthodontic patients, but our knowledge of factors guiding referral decisions predates recent marketplace trends of direct-to-consumer products and broad digitization. To provide orthodontists with current, nationwide data on referral values and communication preferences, a mixed-methods study was conducted.

This study aimed to investigate voice changes in patients who had surgically assisted rapid maxillary expansion (SARME).

The impact of hypodontia on quality of life is a relatively unexplored area. The limited research shows that the issues of importance for people with hypodontia can vary from those of patients undergoing routine orthodontic treatment. This research aimed to use generic and condition-specific scales to evaluate the impact of hypodontia on a young person's oral health-related quality of life, self-esteem, and aesthetics.

The conundrum of determining how to treat a patient with Class III malocclusion is significant, creating a burden on the patient and challenging the orthodontist. The objective of this study was to employ a statistical prediction model derived from our previous cephalometric data on 5 predominant subtypes of skeletal Class III malocclusion to test the hypothesis that Class III subtypes are associated with treatment modalities (eg, surgical vs nonsurgical) and treatment outcome.

This study was conducted to investigate and compare esthetic perceptions of different facial profiles among Hong Kong Chinese laypersons and patients scheduled for orthognathic treatment.

This randomized clinical trial aimed to compare the skeletal and dental effects of miniscrew-anchored maxillary protraction (MAMP) using hybrid hyrax (HH) and conventional hyrax (CH) expanders in growing patients with Class III malocclusion.

This study aimed to investigate the effects of the strong occlusal force on the hemodynamics of gingival microcirculation.

The study aimed to evaluate the content and quality of information offered by YouTube for patients seeking information related to orthodontic retainers.

Orthodontic residents face challenges unparalleled to their predecessors, including competitive marketplaces, rising debt burdens, and changing demographics that have contributed to the shift in initial career choice from owner to employee. We aim to understand factors important to orthodontists at different career stages and the impact on job satisfaction through a sequential mixed methodology study.

The objective of this study was to compare the aging changes of the dental arches in orthodontically treated and untreated subjects after a 4-decade follow-up period.