Use of Hounsfield units in cone-beam computed tomography
The article “Hounsfield unit change in root and alveolar bone during canine retraction” focused on HU changes in the alveolar bone and root surface as the canines were moved by…
Orthodontics
Solving the faculty shortage might require more than money
Just how big a problem is faculty recruitment and retention? Consider a few numbers. About 2 decades ago, a quarter of orthodontics departments were seeking to fill vacant positions; during…
The image we cast
Over the years, many articles have appeared in the AJO-DO regarding public relations and image. These have included discussions of the many “publics” that are involved, including our relationships with…
Three-dimensional finite element analysis of maxillary protraction with labiolingual arches and implants
Introduction In this study, we aimed to evaluate the effects of maxillary protraction using traditional labiolingual arches and implant-type protraction devices before orthopedic treatment of patients with skeletal Class III…
Approximation and contact of the maxillary central incisor roots with the incisive canal after maximum retraction with temporary anchorage devices: Report of 2 patients
The incisive canal is located on the median plane of the maxilla, posterior to the roots of the central incisor. Although the incisive canal is not considered an anatomic structure…
Biomechanical effects of corticotomy approaches on dentoalveolar structures during canine retraction: A 3-dimensional finite element analysis
Introduction Corticotomy has proven to be effective in facilitating orthodontic tooth movement. There is, however, no relevant study to compare the biomechanical effects of different corticotomy approaches on tooth movement….
Comparison of third-order torque simulation with and without a periodontal ligament simulant
Introduction This in-vitro study presents the development and validation of an artificial tooth-periodontal ligament-bone complex (ATPBC) and comparison of its behavior with that of rigid dowels during third-order torque simulation….
Effect of mesiodistal angulation of the maxillary central incisors on esthetic perceptions of the smile in the frontal view
Introduction The purpose of this study was to analyze the effect of mesiodistal angulation of the maxillary central incisors on the smiling esthetics in young adults. Methods Frontal smile photographs…
Effect of low-frequency mechanical vibration on orthodontic tooth movement
Introduction Our objective was to investigate the effect of low-frequency mechanical vibration (LFMV) on the rate of tooth movement, bone volume fraction, tissue density, and the integrity of the periodontal…
Reproducibility of natural head position in normal Chinese people
Introduction In this study, we evaluated the reproducibility of natural head position for pitch and roll acquired using 3 methods. Methods The participants were 30 Chinese adults (ages, 23-28 years) who…
Interactions of hard tissues, soft tissues, and growth over time, and their impact on orthodontic diagnosis and treatment planning
The approach to orthodontic diagnosis has changed gradually but steadily over the past 2 decades. The shift away from diagnosis based entirely on hard tissue evaluations has been a result of…
Histomorphometric analysis of overloading on palatal tooth movement into the maxillary sinus
Introduction Our objective was to evaluate the effect of overloading on the palatal movement of the maxillary molar. Methods The maxillary first molars of male C57Bl/6 mice were moved palatally…
Robert P. Scholz, 1939-2015
Robert P. Scholz The orthodontic world lost a unique member with the passing of Dr Robert P. Scholz of Discovery Bay, California. He was known as “Uncle Bob” to his…
Nasomaxillary hypoplasia with a congenitally missing tooth treated with LeFort II osteotomy, autotransplantation, and nickel-titanium alloy wire
Introduction In some skeletal Class III adult patients with nasomaxillary hypoplasia, the LeFort I osteotomy provides insufficient correction. This case report describes a 20-year-old woman with a combination of nasomaxillary…
Comparison of 2 means for matched observations (paired ttest) and ttest assumptions
When we are making measurements before and after an intervention or at the same time on different sites (split-mouth design) in the same patient, we use a paired t test….
Esthetic evaluation of incisor inclination in smiling profiles with respect to mandibular position
Introduction The smile is a key facial expression, and a careful assessment of the facial profile in smiling is an essential part of a complete orthodontic diagnosis. The aim of…
Effect of fluoxetine on induced tooth movement in rats
Introduction Fluoxetine is a widely used antidepressant. Its various effects on bone mineral density are well described. The aim of this study was to evaluate the effect of fluoxetine on…
Smile because of Dr Robert Murray Ricketts
In the sciences, scholars emerge from time to time to lay down principles and crystallize the information of their day. Such a scholar was Dr Robert Murray Ricketts (1920-2003) (…
Risk management strategies in orthodontics. Part 2: Administrative considerations
Orthodontic practice results in relatively few patient challenges and litigations. This often leads to a false sense of security and encourages orthodontists to optimize practice management techniques that may be at…
Sagittal correction of adolescent patients with modified palatal anchorage plate appliances
The palate has been reported to be a suitable skeletal anchorage site in adolescents and adults. This article introduces new treatment modalities for correction of sagittal discrepancies by molar protraction…
