Longitudinal vs retrospective studies
An article on dentofacial development and early mandibular incisor crowding in the August 2016 issue was done in an excellent manner; especially, the statistical part of the study was so…
Orthodontics
Author’s response
When the editorial entitled “One phase or two, and Buridan’s paradox” was written, it was intended to point out that there was good evidence to support early treatment performed to…
The paradox of 1-phase vs 2-phase orthodontic treatment
Phase 1 and phase 2 orthodontic treatment may be framed as early vs late orthodontic treatment and the methodology chosen based on the goals of treatment. The quandary may be…
Authors’ response
We want to thank you for your valuable comments on our article (El-Timamy AM, El-Sharaby FA, Eid FH, Mostafa YA. Three-dimensional imaging for indirect-direct bonding. Am J Orthod Dentofacial Orthop…
Authors’ response
We agree that the term “hybrid” is appropriate if the dentition is used with the implants for anchorage for the expansion force. However, this does not mean that incorporating the…
Ethical considerations of 3-dimensional imaging
We read with interest the article on 3-dimensional (3D) imaging for indirect-direct bonding in the June issue (El-Timamy AM, El-Sharaby FA, Eid FH, Mostafa YA. Three-dimensional imaging for indirect-direct bonding….
Three-dimensional imaging for indirect-direct bonding could expose patients to unnecessary radiation
El-Timamy et al are commended for their June 2016 article introducing a new concept of bracket positioning using cone-beam computed tomography imaging (CBCT) and computer-aided manufacturing (El-Timamy AM, El-Sharaby FA, Eid…
Authors’ response
Thank you for your comments on our article “Three-dimensional imaging for indirect-direct bonding.” Your interest in our research gives us the opportunity to provide more insight and to further clarify…
What are the limits of microimplant-assisted palatal expanders?
In a case report in the May 2016 issue, Carlson et al reported the use of a microimplant-assisted rapid palatal expansion (MARPE) appliance to correct transverse maxillary deficiency in an adult…
Rethinking American Board of Orthodontics Certification: A paradigm shift
The Greek philosopher Heraclitus is credited for stating that the only thing that is constant is change. Businesses that think they can survive today using the same strategies they used…
Root resorption of maxillary incisors retracted with and without skeletal anchorage
Introduction Our objective was to compare root resorption degree of the maxillary central incisors retracted with and without skeletal anchorage. Methods This nonrandomized historical control study included 37 patients requiring…
Morphology of palatally impacted canines: A case-controlled cone-beam volumetric tomography study
Introduction The aim of this study was to investigate the relationships between an apical curvature or a hook and the crown/root ratio in subjects with and without palatally impacted maxillary…
Esthetic perceptions of facial silhouettes after treatment with a mandibular protraction appliance
Introduction In this retrospective study, we aimed to evaluate the effects on the facial silhouettes produced by a mandibular protraction appliance associated with corrective treatment in Class II patients. Methods…
Association between 3-dimensional mandibular morphology and condylar movement in subjects with mandibular asymmetry
Introduction The purpose of this study was to evaluate the hypothesis that 3-dimensional mandibular morphology is correlated with condylar movement in patients with mandibular asymmetry. Methods Subjects were classified into…
Juvenile idiopatic arthritis in orthodontics: Case report with a 6-year follow-up
Juvenile idiopathic arthritis is a childhood disease that causes joint swelling and pain, and limitation in the range of joint movements. It is characterized by progressive destruction of the joints….
Transport distraction osteogenesis combined with orthodontic treatment in a patient with unilateral temporomandibular joint ankylosis
Temporomandibular joint ankylosis manifests a range of clinical characteristics dependent upon the age of onset, the affected side, and the severity. When it occurs during development, mandibular growth is affected,…
Directed acyclic graphs: A tool to identify confounders in orthodontic research, Part I
Confounding is a bias that threatens the validity of causal inferences in a study. Rothman and Greenland defined confounding: “A confounding factor must not be affected by the exposure or…
Forces and moments applied during derotation of a maxillary central incisor with thinner aligners: An in-vitro study
Introduction Recent studies have shown that therapeutic loads applied to individual teeth by aligners may substantially exceed recommended values. The primary purpose of this study was to quantify force and…
Intermittent hypoxia causes mandibular growth retardation and macroglossia in growing rats
Introduction In this study, we aimed to examine the role of intermittent hypoxia (IH) in dentofacial morphologic changes in growing rats. Methods Seven-week-old male rats were exposed to IH at…
When communicating isn’t enough
The exact words used by the surgeon to express the risks associated with the proposed surgical procedure were “infection, bleeding, nerve damage, dural leak, injury to the nerve, destabilization of…
