American Journal of Orthodontics and Dentofacial Orthopedics

Interdisciplinary treatment for patients with Treacher Collins syndrome is challenging because of the rarity of the condition and the wide variety of phenotypic expression. A 23-year-old male was diagnosed with Treacher Collins syndrome with a history of severe obstructive sleep apnea. He presented with a Pruzansky-Kaban classification grade I mandible, skeletal type II pattern with a hyperdivergent mandibular plane, severe convex profile, and Class II malocclusion with a missing mandibular incisor.

This split-mouth trial aimed to examine the effects of light-emitting diode (LED)–mediated photobiomodulation compared with no photobiomodulation on maxillary canine distalization.

The objectives of this study were to determine the prevalence of malocclusion among children with Zika virus-associated microcephaly (MZV) and to describe the most common malocclusion in this population.

An article by Wang et al was published in 2020 with the purpose to investigate the risk factors for impacted maxillary canine–linked severe lateral incisor root resorption (Wang H, Li T, Lv C, Huang L, Zhang C, Tao G, et al. Risk factors for maxillary impacted canine-linked severe lateral incisor root resorption: a cone-beam computed tomography study. Am J Orthod Dentofacial Orthop 2020;158:410-9). Although the article was quite informative, we have some questions.

It was a pleasure reading the case report in the October issue reporting a novel method for treating Class II malocclusion (El-Bokle D, Abbas NH. A novel method for the treatment of Class II malocclusion. Am J Orthod Dentofacial Orthop 2020;158:599-611).

This study aimed to evaluate the efficiency of a newly constructed computer-based decision support system (DSS) on the basis of artificial intelligence technology and designed to plan treatment for patients with a deep overbite.

We read with so much interest the letter to the editor regarding our recent article, “A novel method for the treatment of Class II malocclusion.”

This reflection commentary is aimed to be an aide-mémoire about our clinical journey and the vicissitudes that we all go through, the Dunning-Kruger Effect.1

We read the article on low-level laser therapy in the April 2020 issue with great interest (Mistry D, Dalci O, Papageorgiou SN, Darendeliler MA, Papadopoulou AK. The effects of a clinically feasible application of low-level laser therapy on the rate of orthodontic tooth movement: a triple-blind, split-mouth, randomized controlled trial. Am J Orthod Dentofacial Orthop 2020;157:444-53).

A case report by El-Bokle and Abbas (El-Bokle D, Abbas NH. A novel method for the treatment of Class II malocclusion. Am J Orthod Dentofacial Orthop 2020;158:599-611) in the October issue reported 2 cases of Class II malocclusion in which the patients were treated with inclined bite raisers beveled 45° combined with short light Class II intermaxillary elastics, showing improvement in the occlusal and profile relationships in both patients at the end of the treatment. The article was quite interesting and appreciated by us, but we have some doubts.

I congratulate AlSaty et al for their article in October 2020 (AlSaty G, Xiang J, Burns M, Eliliwi M, Palomo JM, Martin C, et al. Follow-up observation of patients with obstructive sleep apnea treated by maxillomandibular advancement. Am J Orthod Dentofacial Orthop 2020;158:527-34). The research provides valuable information about the airway changes in patients with obstructive sleep apnea syndrome (OSAS) treated with maxillomandibular advancement (MMA).

In 2015, the American Association of Orthodontists (AAO) established a new award, the Lifetime Achievement Award for Orthodontic Research. Previous recipients include Dr Proffit (2017), Dr Johnston, Jr (2018), Dr Buschang (2019), and Dr Kuijpers-Jagtman (2020). Nominations for the next award were solicited in 2020.

You remember Sean quite well. He was the salutatorian of your dental school class. Although many of your classmates did not match or were not accepted to specialty programs immediately after dental school graduation, Sean was promptly invited to his first-choice program. He was an intelligent fellow, almost charismatic in demeanor with an apparent warmth that seemed as if it could charm a snake. But his reputation for cheating on exams was legendary among those in your class. This behavior was just 1 example of his predisposition toward dishonesty and deception.

Statistical tests used to analyze data require assumptions for the results to be valid. For instance, when performing an independent t test for the equality of 2 means, the normality assumption mandates that the populations from which the 2 samples were drawn follow the normal distribution. In linear regression analysis, a basic assumption is that the residuals are normally distributed.

We thank the authors for their letter and interest in our article. They questioned whether leveling the curve of Spee would be compromised because of using bonded inclined bite raisers on premolars in patients with Class II malocclusion with a deep overbite because of an intrusive force vector on the premolars.

We appreciate the interest and the insightful comments on our article.

Hearty congratulations to the authors for their publication on posterior arch defects (Selvam NP, Hansen M, Kashtwari D. Incidental findings of posterior arch defects of the atlas in orthodontic patients: a case series. Am J Orthod Dentofacial Orthop 2020;158:35-9). It was noteworthy that they recognized that the orthodontist might be the first to see, recognize, and report such findings, being the first to take cephalometric films to identify such anomalies. Highlighting the clinical significance of these entities, the authors' stated primary goal was well done, as well as pointing out how “the diagnosis of these defects could lead to a major lifestyle change.” That is a correct assessment.

We thank the authors of this letter for their interest in our study.

Thank you for the insightful commentary on our manuscript. We appreciate this opportunity to explain some doubts raised in your letter.

In Lipinski v Krupp, No. A-02561-5T3 (NJ Super Ct App Div, Feb 15, 2017), the plaintiff, on behalf of the deceased patient, submitted the following motion in his appeal, having lost at the trial court level. He claimed that “[T]he combined timing, language, and circumstances surrounding the issuance of the trial court's supplemental deliberations charge coerced the jury into reaching an expeditious verdict that manifested a surrender by one or more of the jurors’ convictions and caused a miscarriage of justice.” For the reasons stated below, the appellate court disagreed and affirmed the lower court ruling in favor of the defendant.

The purpose of this study was to assess the stability of changes in the upper airways 4 years after orthognathic surgery in patients with skeletal Class II malocclusion.

This single-center, 2-arm, parallel-group randomized clinical trial aimed to compare the dimensional dental arch changes after anterior open bite (AOB) treatment with bonded spurs associated with posterior build-ups vs bonded spurs alone.

Orthodontically induced inflammatory root resorption (OIIRR) constitutes an undesirable risk connected to orthodontic treatment. Finite element analysis (FEA) is a powerful tool to study the risk of OIIRR. However, its efficiency in predicting OIIRR depends on the insertion of the correct inputs and the selection of an output coherent with the clinical failure mechanism.

The initial position of an impacted maxillary canine might influence the outcome of surgically assisted exposure and orthodontic alignment. Therefore, the purpose of this study was to evaluate existing correlations between the initial position of the maxillary canine and the outcomes of treatment.

This research aimed to investigate the effect of Nano-Bio Fusion Gingival Gel ([NBFG] NanoCgureTech, Gangdong-gu, Seoul, Korea) as an aid along with oral hygiene advice and routine scaling in patients with malocclusion to control treatment-induced gingivitis and periodontitis in patients undergoing fixed orthodontic treatment.

Orthodontic tooth movement (OTM) relies on efficient remodeling of alveolar bone. While a well-controlled inflammatory response is essential during OTM, the mechanism regulating inflammation is unknown. Autophagy, a conserved catabolic pathway, has been shown to protect cells from excess inflammation in disease states. We hypothesize that autophagy plays a role in regulating inflammation during OTM.

Rarely is the extraction of the four first molars the ideal choice in the course of orthodontic treatment, particularly in older patients. Although this approach can offer distinct advantages in carefully selected patients, it is also associated with a number of well-recognized problems, including the extension of treatment times, anchorage management, and control of second molars during space closure. However, by careful use of contemporary materials and techniques, a high standard of treatment can be achieved, even in patients with complex malocclusions.

The primary aim of this study was to investigate the change in upper airway dimensions and in mandibular position after miniscrew-assisted treatment with premolar extractions in adult patients with Class II high-angle malocclusion. The secondary aim was to determine the correlation between changes in upper airway dimensions and changes in mandibular position in these patients.

C-expanders are tissue- and bone-borne maxillary expanders that are anchored by 6 orthodontic miniscrews, 3 on each side of the palate. The purpose of the study was to investigate the effect of C-expanders on the circummaxillary sutures and bucco-palatal axis of teeth in 3-dimensional finite element analyses when anchor screw vectors are different.

Correction to: Eric R. Linkous, Terry M. Trojan, and Edward F. Harris. External apical root resorption and vectors of orthodontic tooth movement. Am J Orthod Dentofacial Orthop 2020;158:700-9.

The purpose of this study was to evaluate the correlation between cephalometric measurements and patients’ perception of nasal changes in those with Class III malocclusion who had undergone orthognathic surgery.

The purpose of this study was to analyze and clarify tooth movement during mesialization of the whole maxillary dentition with various force angulations (FAs).

The objective of this research was to evaluate the reliability of 2 methods (Andrews’ Element III analysis and Yonsei transverse analysis) in maxillary transverse deficiency diagnosis.

This study evaluated whether presurgical characteristics, the magnitude of mandibular advancement, and changes in mandibular plane angle are correlated with long-term stability and postsurgical condylar remodeling and adaptations using 3-dimensional imaging.

The objective of this study was to evaluate in vitro and in vivo bacterial endotoxin (LPS) adhesion in polyurethane and silicone esthetic elastomeric orthodontic ligatures. The null hypotheses tested were: (1) there is no LPS adhesion in esthetic elastomeric orthodontic ligatures; and (2) there is no difference in the LPS adhesion between different brands of these ligatures.

The study aimed to investigate the effect of a nonextraction treatment approach with interdental stripping (IDS) on the dentofacial structures in patients with dental and skeletal Class I, II, and III malocclusions.

Alexander (Alex) Jacobson passed away at his home in Denver, Colorado, with Norma-Jill, his loving wife of 50 years, at his side. Born in 1925 in Bethlehem, South Africa, Alex had a physically active childhood exploring and learning. As a young man, he enjoyed mountain climbing and baseball, and he was honored to represent South Africa in the Winter Olympics for skiing. Dr Jacobson was a gentleman and an icon of civility; he was compassionate, considerate, thoughtful, and a delightful friend, and conversationist.

Thomas DeCoursey Pryse, DMD of Knoxville, Tennessee, departed this life on November 30, 2020. He died peacefully at his home with his beloved wife of 71 years, Mary, by his side.

The objective of this research wsa to compare maxillary width and hard palate thickness in men and women with different vertical and sagittal skeletal patterns.

Attention deficit-hyperactivity disorder is a behavioral disorder characterized by a lack of focus, impulsive behavior, and or excessive activity. This research aimed to evaluate the association between signs of attention deficit-hyperactivity disorder and malocclusion in schoolchildren.

The objective of this research was to evaluate the correlation between 3-dimensional (3D) lip vermilion (LV) morphology and skeletal patterns as well as incisor measurements in young Chinese adults.

The purpose of this quantitative investigation was to assess the influence of lip prominence in relation to the esthetic line (E-line) on perceived attractiveness and threshold values of desire for treatment.

Treatment of orthodontic patients with temporomandibular disorder (TMD) is challenging for orthodontists because of the TMD signs and symptoms and unstable mandible position, which may lead to improper diagnosis and treatment design. This case report presents a 22-year-old woman with proclined maxillary incisors and TMD. First, stabilization splint therapy was implemented to eliminate temporomandibular joint pain and to obtain the stable adapted centric posture. Subsequently, orthodontic treatment was initiated on the basis of a definitive diagnosis made from the postsplint records.

Research on clear aligner treatment (CAT) has increased in recent years. In this study, we aimed to perform a bibliometric and visualized analysis to identify and critically assess the 50 most highly cited articles on CAT.