Are orthodontic landmarks and variables in digital cephalometric radiography taken in fixed and natural head positions reliable?
ConclusionsCephalometric landmarks and variables showed reliability in digital lateral cephalometric radiography in fixed and natural head position. In lateral cephalograms taken in fixed head position an anterior inclination of the head was noticed compared to those in natural head position.RésuméObjectifL’objet de l’étude était d’étudier la fiabilité des points et variables les plus communs sur radiographies céphalométriques numériques avec position de la tête fixée et naturelle.Matériels et méthodesVingt et un patients avec position de la mandibule en avant ou en arrière, traités dans le cadre du se...
Source: International Orthodontics - September 6, 2019 Category: Dentistry Source Type: research
Distribution and amount of stresses caused by insertion or removal of orthodontic miniscrews into the maxillary bone: A finite element analysis
ConclusionMost of the stress and strain is tolerated by the cortical bone and not the cancellous one. Using cylindrical miniscrews might be more bone-friendly. However, all cases had stresses below tolerable thresholds, and hence are safe.RésuméObjectifLa stabilité initiale des mini-vis est un facteur déterminant de leur succès en tant qu’ancrage orthodontique. L’un des facteurs influençant cette stabilité est la contrainte exercée sur l’os par la vis. Étant donné que la répartition ainsi que le degré des contraintes et déformations produites lors de l’insertion ou du retrait des mini-vis n’avaient j...
Source: International Orthodontics - September 5, 2019 Category: Dentistry Source Type: research
The relation between dental age and cervical vertebral maturation in orthodontic patients aged 8 to 16 years: A cross-sectional study
ConclusionConsidering the correlation between skeletal age and dental calcification, dental age, especially the developmental stage of mandibular second molars, based on panoramic radiographs, can be served as a primary diagnostic tool for determining the skeletal maturity stage of patients.RésuméObjectifL’objectif de cette étude était d’évaluer la relation entre l’âge dentaire de sept dents du secteur mandibulaire gauche déterminé par la méthode de Demirjian et l’âge squelettique déterminé par la méthode de Baccetti.Matériels et méthodesCette étude transversale a évalué 600 sujets âgés de 8 ...
Source: International Orthodontics - September 5, 2019 Category: Dentistry Source Type: research
Variation of upper lip pressure on upper teeth during non-extraction orthodontic treatment: A prospective clinical study
ConclusionThis study showed that increasing inter-canine width disrupts the muscle equilibrium and therefore is prone to relapse, whereas the upper lip can better adapt to the protrusion of upper incisors.RésuméObjectifLes objectifs de cette étude clinique prospective étaient de quantifier la variation de pression exercée par la lèvre supérieure sur les dents supérieures pendant la phase d’alignement et d’évaluer sa capacité à s’adapter aux changements de position des dents.Matériels et méthodesTrente jeunes sujets en relation squelettique de classe I nécessitant un traitement orthodontique sans extract...
Source: International Orthodontics - September 5, 2019 Category: Dentistry Source Type: research
Pharyngeal dimensional changes in class II malocclusion treatment when using Forsus® or intermaxillary elastics – An exploratory study
ConclusionsBoth orthodontic treatment approaches appear to be associated with a similar increase in oropharyngeal airway dimensions. Male patients under 14-year-old had a greater significant increase compared to female patients and older children. Normal pharyngeal dimensions changes were not accounted for.RésuméObjectifL’obstruction des voies respiratoires pharyngées peut favoriser certaines formes de troubles respiratoires du sommeil (SDB) chez les enfants prédisposés, en particulier ceux qui présentent une malocclusion de classe II. Des changements dans les zones anatomiques entourant la région pharyngée penda...
Source: International Orthodontics - September 4, 2019 Category: Dentistry Source Type: research
Evaluation of upper airway volume and craniofacial volumetric structures in obstructive sleep apnoea adults: A descriptive CBCT study
ConclusionsCraniofacial structures did not show significant differences between the groups, but in the OSA group the posterior space released for upper airway was significantly bigger and UAWV was significantly smaller.RésuméObjectifMesurer, à l’aide d’une évaluation descriptive tridimensionnelle, le volume des voies respiratoires supérieures (UAWV) et le volume des structures crâniofaciales de patients adultes souffrant d’apnée obstructive du sommeil (OSA) pour les comparer aux résultats correspondants chez les adultes sans troubles du sommeil.Matériels et méthodesL’échantillon se composait de 54 homme...
Source: International Orthodontics - September 3, 2019 Category: Dentistry Source Type: research
First premolar extractions in an adolescent presenting a Class I biprotrusion malocclusion with skeletal Class II: A case report
Publication date: Available online 31 August 2019Source: International OrthodonticsAuthor(s): Frédéric Rafflenbeul, Hadrien Bonomi-Dunoyer, Thibaut Siebert, Yves BolenderSummaryThis case report shows the orthodontic treatment of four first premolar extractions of a 14-year-old teenager presenting a dental Class I malocclusion with a severe retrognathic mandible. It reflects conflicting views on objectives between the orthodontist who takes into account the facial balance and the patient who only desires a tooth alignment.RésuméCe cas clinique montre le traitement d’un patient de 14 ans présentant une malocclusion d...
Source: International Orthodontics - September 1, 2019 Category: Dentistry Source Type: research
The effect of cigarette smoke on the shear bond strength of metallic and ceramic orthodontic brackets: An in vitro study
ConclusionCigarette smoke consumption has significant effects on the SBS of orthodontic brackets. SBS levels were significantly lower in the smoke exposure groups and the lowest values corresponded to the cigarette smoke exposed metallic brackets.RésuméObjectifL’adhérence entre l’émail et la base de l’attache est influencée par l’exposition à l’environnement oral. Le but de cette étude était de déterminer l’effet de la fumée de cigarette sur l’adhérence (SBS) des attaches orthodontiques collées métalliques et céramiques.Matériels et méthodesUn échantillon de 60 prémolaires humaines extraite...
Source: International Orthodontics - August 31, 2019 Category: Dentistry Source Type: research
Stable deep bite correction with true mandibular incisor intrusion in a late adolescent patient with skeletal deep bite: A case report
ConclusionsCe cas clinique pourrait servir de proposition thérapeutique en cas d’insuffisance verticale antérieure réputée instable. (Source: International Orthodontics)
Source: International Orthodontics - August 31, 2019 Category: Dentistry Source Type: research
Impact of adhesive system generation and light curing units on orthodontic bonding: In vitro study
ConclusionFourth and fifth GASs showed similar SBS higher than seventh GAS. Fourth GAS bonds were able to resist longer against traction forces than those set up by fifth generation. Seventh GAS bonds offered the least efficient resistance. ARI = 0 was the highest in group 1. However, Group 4 showed the highest ARI = 1 and ARI = 2 revealing cohesive failure. We also found that the adhesive power is proportional to the power of the lamp used. In fact, we concluded that 1500 mw/cm2 units light curing during 30 seconds generated an ideal energy to enhance orthodontic bracket adhesion.Résum...
Source: International Orthodontics - August 30, 2019 Category: Dentistry Source Type: research
Dental and skeletal changes associated with the Damon system philosophical approach
ConclusionThere is not enough evidence to support the claim that the Damon system allows additional arch expansion with better tipping control than with traditional techniques.RésuméObjectifComparer les changements squelettiques et dento-alvéolaires produits par la philosophie de traitement du système Damon à ceux produits par les techniques traditionnelles de traitement orthodontique.Matériels et méthodesUne recherche électronique dans quatre grandes bases de données, Cochrane, PubMed, EMBASE, et Google Beta Scholar, a été effectuée le 5 octobre 2018. Des essais comparatifs randomisés, des essais cliniques c...
Source: International Orthodontics - August 30, 2019 Category: Dentistry Source Type: research
Evaluation of the reliability of a practical digital dental X-ray method for the first metacarpophalangeal joint to assist the skeletal age in peripubertal orthodontic period
This study aimed to evaluate the validity of using of digital dental X-ray for the thumb region in assessment of skeletal maturation stage around functional orthodontic treatment time.Materials and methodsThe sample consisted of 200 patients (100 males and 100 females) aged between (9.5–18) years. Each patient underwent a hand-wrist radiograph and a digital radiograph for the thumb region taken by a dental X-ray machine. Skeletal changes were studied in the sesamoid bone and first Metacarpophalangeal joint region, and compared to Björk method.ResultsGood correlation was noted between our thumb method stages (Th index) a...
Source: International Orthodontics - August 29, 2019 Category: Dentistry Source Type: research
YouTube video analysis as a source of information for patients on impacted canine
ConclusionHealthcare specialists should be aware of the content of the video-sharing platforms and direct their patients to correct and reliable e-information resources.RésuméObjectifÉtudier le contenu de vidéos présentes sur YouTube™ concernant les canines incluses et leur traitement chirurgical.Matériels et méthodesDans cette étude transversale, l’expression “canine incluse” a été recherchée sur YouTube™. Après avoir exclu les doublons, les vidéos non pertinentes, les vidéos non anglophones, les vidéos sans contenu audio et sans contenu vidéo, soixante-et-une vidéos ont été examinées de faç...
Source: International Orthodontics - August 28, 2019 Category: Dentistry Source Type: research
In vitro comparison of shear bond strengths of ceramic orthodontic brackets with ceramic crowns using an aluminium oxide air abrasion etchant
ConclusionThe Symetri bracket was the only bracket that was effective for both substrates (mean SBS > 6 mPa). The Etch Master protocol does not appear effective for e.max® CAD.RésuméObjectifLe but de cette étude était de déterminer les différences d’adhérence de trois types d’attaches orthodontiques en céramique quand elles sont collées sur différents substrats en céramique avec un protocole d’aéro-abrasion à la poudre d’oxyde d’alumine décapante.Matériels et méthodesDeux groupes substrat comportant l’un, trente-six échantillons de disilicate de lithium (e.max® CAD) et l’autr...
Source: International Orthodontics - August 28, 2019 Category: Dentistry Source Type: research
Medically compromised patients in orthodontic practice: Review of evidence and recommendations
This article will discuss some medical conditions that might be seen by orthodontists. Also, recommendations and modifications of the orthodontic treatment plan will be discussed thoroughly.Materials and methodsA computerized electronic search of the literature was conducted in Google Scholar and PubMed and was limited to publications in English.ResultsOrthodontic management was studied in cases of Infective endocarditis (IE), Thrombocytopenia, Hemophilia, Sickle cell anemia, Thalassemia, Diabetes mellitus (DM), Thyroid Disorders, Asthma, DiGeorge Syndrome, HIV/AIDS, Organ transplantation, Orthodontic management, Juvenile ...
Source: International Orthodontics - August 28, 2019 Category: Dentistry Source Type: research
