Condyle fossa relationship associated with functional posterior crossbite, before and after rapid maxillary expansion.

Objective: To investigate condylar symmetry and condyle fossa relationships in subjects with functional posterior crossbite comparing findings before and after rapid maxillary expansion (RME) treatment through low-dose computed tomography (CT).

Materials And Methods: Twenty-six patients (14 girls and 12 boys, mean age 9.6 ± 1.

Influence of straight-pull headgear on the eruption pattern of maxillary canines: a retrospective study.

Aim: To evaluate the effect of the straight-pull headgear and activator (Andresen type) treatment on the eruption pattern of impacted maxillary canines.

Methods: Mesiodistal positional, angular, and vertical changes of impacted canines were evaluated and statistically analyzed in pre- and posttreatment panoramic radiographs of 22 patients (12 treated with combination headgear, 10 treated with an activator).

Results: Eruption of the permanent canines in the group treated with straight-pull headgear was significantly more successful (88%) than in the group treated with an activator (62%).

Skeletal anomalies and normal variants in patients with palatally displaced canines.

Objective: To test the null hypothesis that there is no increased prevalence of skeletal anomalies and/or normal variants as evidenced by the cephalometric radiographs of patients with palatally displaced canines (PDC).

Materials And Methods: The treatment records of 38 white subjects between 14 and 20 years old with PDC were collected and evaluated retrospectively. Inclusion criteria for the study required that the case records include good-quality panoramic radiographs and lateral cephalometric radiographs with the first four cervical vertebrae clearly visible.

Nevoid Basal cell carcinoma syndrome: a cephalometric study of patients and controls.

Craniofacial morphology of patients with nevoid basal cell carcinoma syndrome (NBCCS) has sometimes been reported at clinical examination, but any investigation has described it on the basis of cephalometric measurements.The purpose of this study was to conduct a cephalometric analysis of patients with NBCCS and to compare measurements with non-NBCCS subjects of similar ages, to elucidate if there is any relationship between NBCCS and craniofacial morphology.The study population consisted of 14 adult patients (9 men and 5 women), ranging in age from 18.

Landmark identification error in posteroanterior cephalometric radiography. A systematic review.

Objective: To evaluate the reliability of landmark identification in posteroanterior cephalometrics.

Materials And Methods: A literature search was conducted to identify all articles concerning landmark identification error in the frontal radiograph. Electronic databases (PubMed, Web of Science, Cochrane Database, PubMed Central, and HubMed) were searched.

Levels of matrix metalloproteinases 1 and 2 in human gingival crevicular fluid during initial tooth movement.

Introduction: During orthodontic treatment, the early response of periodontal tissues to mechanical stress involves several metabolic changes that allow tooth movement. Many studies have evaluated these modifications through the analysis of various metabolites released into gingival crevicular fluid (GCF). The purpose of this investigation was to evaluate matrix metalloproteinase (MMP)-1 and MMP-2 in the GCF of human teeth exposed to orthodontic force on both the tension and compression sides in the initial phase of orthodontic tooth movement.

A sella turcica bridge in subjects with dental anomalies.

Calcification of the interclinoid ligament (ICL) of the sella turcica, or sella turcica bridging, has been associated with severe craniofacial deviations. Despite no comprehensive study on the sella turcica bridge, a relationship with tooth and eruption disturbances has been reported. In order to investigate whether congenital absence of the second mandibular premolar, or the presence of a palatally displaced canine (PDC), is associated with sella bridging, a retrospective study was performed.

Mandibular growth in subjects with infraoccluded deciduous molars: a superimposition study.

The aim of this longitudinal cephalometric study was to analyze the growth characteristics of the mandible in subjects with infraocclusion of the mandibular deciduous molars. A group of 28 subjects with bilateral infraocclusion of mandibular deciduous molars (IG) were enrolled in a prospective longitudinal study on the growth characteristics of the mandible and compared with a control group (CG) of 28 subjects. Lateral cephalograms were collected in both groups at T1 and at T2, after a mean 19-month interval in the IG and after a mean 16-month interval in the CG.

Interactive online program to improve cephalometric tracing skills.

Cephalometric analysis has a key role in orthodontic clinical practice and research. The skills needed to accurately trace radiographs can be acquired only through practice. We developed an interactive, Internet-based system to help students hone their cephalometric tracing skills.

Palatally displaced canine anomaly in monozygotic twins.

The palatally displaced canine (PDC) anomaly is a tooth malposition occurring in 1% to 3% of most populations. From the results of family studies, the PDC phenotype appears to be under strong genetic influence. In this study we report monozygotic (MZ) twin girls with bilateral PDC expression.

Expression of heat shock protein 27 (HSP27) in human temporomandibular joint discs of patients with internal derangement.

Heat shock proteins (HSPs) are believed to represent a cellular stress response mechanism that protects intracellular proteins from damaging events. Some studies have demonstrated an enhanced expression of large-molecular-weight HSPs in diseased systematic joints. Small heat shock proteins, and among these HSP27, have been studied to a lesser extent.