Artigo: Cephalometric and occlusal changes of Class III malocclusion treated with or without extractions - Journal 2020 v25n4 - DPJO


Cephalometric and occlusal changes of Class III malocclusion treated with or without extractions

Artigo Original

Objective: The aim of this retrospective study was to evaluate the cephalometric and occlusal changes of orthodontically treated Class III malocclusion patients. Methods: The experimental groups comprised 37 Class III patients treated: G1) without (n=19) and G2) with extractions (n=18) . The control group (G3), matched by age and sex with the experimental groups, consisted of 18 subjects with untreated Class III malocclusion. Cephalometric (radiographs) and occlusal (study models) changes were assessed between the beginning (T1) and the end (T2) of treatment. Intergroup comparisons were...

Autores: Guilherme Janson, Roberto Bombonatti, Daniela Garib, Juliana Fraga Soares Bombonatti, Aron Aliaga Del Castillo, Bryan Tompson, 

Why is clinical decision making not always efficient?
Why is clinical decision making not always efficient?

Herbert Simon, an American social scientist, described, in 1947, in his book ‘Administrative Behavior’, the theory of decision-making. The main purpose of his work was to understand the cognitive and behavioral mechanisms that human beings use to make choices. Briefly, what Simon explains is that to make an efficient decision three steps are necessary: (a) to identify and list all alternatives; (b) to determine all consequences resulting from each alternative; and (c) to compare the...

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orthodontics highlights
orthodontics highlights

The year 2020 will be marked in History by the coronavirus pandemic, which completely changed the lives of everyone on Earth. As we all know, the disease is highly contagious, transmitted by asymptomatic carriers via aerosol and droplets. The practice of social detachment, keeping a distance of 1 to 2 m between people, is widely recommended to slow or stop the spread of the virus. In orthodontic practice, this distance is difficult to maintain, given the need for orthodontic maintenance, which...

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Negligible tooth resorptions after anterior open bite treatment using skeletal anchorage with miniplates
Negligible tooth resorptions after anterior open bite treatment using skeletal anchorage with miniplates

Introduction: When miniplates are used as anchoring for orthodontic mechanics for anterior open bite correction by retraction of anterior teeth and posterior teeth intrusion and retraction, orthodontically induced inflammatory external apical root resorption is clinically negligible. Methods: A homogeneous sample of 32 patients was used, and the roots of the teeth were compared on CT scans performed before and after orthodontic treatment. Results: The observed root resorption was minimal, and...

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Incisor root length in individuals with and without anterior open bite: a comparative CBCT study
Incisor root length in individuals with and without anterior open bite: a comparative CBCT study

Objective: This study aimed to compare the root length of maxillary and mandibular incisors between individuals with open bite versus matched individuals with adequate overbite. Methods: This comparative, matched and retrospective study included 48 cone beam computed tomographies (CBCTs) obtained at a university radiological center. Scans belonged to 24 individuals with open bite (overbite ≤ 0 mm) and 24 individuals with adequate overbite (controls). Both groups were matched by age, sex,...

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Cephalometric and occlusal changes of Class III malocclusion treated with or without extractions
Cephalometric and occlusal changes of Class III malocclusion treated with or without extractions

Objective: The aim of this retrospective study was to evaluate the cephalometric and occlusal changes of orthodontically treated Class III malocclusion patients. Methods: The experimental groups comprised 37 Class III patients treated: G1) without (n=19) and G2) with extractions (n=18) . The control group (G3), matched by age and sex with the experimental groups, consisted of 18 subjects with untreated Class III malocclusion. Cephalometric (radiographs) and occlusal (study models) changes...

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Indication of clear aligners in the early treatment of anterior crossbite: a case series
Indication of clear aligners in the early treatment of anterior crossbite: a case series

Introduction: Anterior crossbite (AC) is defined as a reverse sagittal relationship between maxillary and mandibular incisors. According to an evidence-based orthodontic triage, the treatment need of AC is indicated if any occlusal interference is forcing the mandible towards a Class III growth pattern. Removable and fixed appliances have been suggested to correct AC. Objective: The present report aims at presenting the benefits of an alternative therapy for the early treatment of anterior...

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Von Mises stresses on Mushroom-loop archwires for incisor retraction: a numerical study
Von Mises stresses on Mushroom-loop archwires for incisor retraction: a numerical study

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Evaluation of zinc-oxide nanocoating on the characteristics and antibacterial behavior of nickel-titanium alloy
Evaluation of zinc-oxide nanocoating on the characteristics and antibacterial behavior of nickel-titanium alloy

Objective: To investigate the effect of ZnO nanocoating on mechanical properties of NiTi orthodontic wires and antibacterial activity. Methods: 0.016 x 0.022-in NiTi orthodontic wires were coated with ZnO nanoparticles using an electrochemical deposition method with three electrodes system in 0.1M Zn(NO3)2. Mechanical properties and frictional resistance of the coated wires were investigated using an universal testing machine. Antibacterial effect of ZnO coating was also investigated....

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Effect of surface treatments on the adhesive properties of metallic brackets on fluorotic enamel
Effect of surface treatments on the adhesive properties of metallic brackets on fluorotic enamel

Objective: To compare the effectiveness of the pretreatment with sandblasting and deproteinization with NaOCl on bond strength (SBS), in situ conversion degree (CD) of brackets in fluorotic enamel, and enamel etching pattern. Methods: A total of 90 non-carious maxillary premolars were used. The teeth were then assigned to six experimental groups according to: enamel surface (sound and fluorotic enamel); surface treatment (Regular etch with 37% phosphoric acid [RE]; 5.2% sodium hypochlorite +...

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The ability of orthodontists and maxillofacial surgeons in predicting spontaneous eruption of mandibular third molar using panoramic serial radiographs
The ability of orthodontists and maxillofacial surgeons in predicting spontaneous eruption of mandibular third molar using panoramic serial radiographs

Objective: To evaluate the skill of orthodontists and oral/maxillofacial surgeons (OMFS) in providing a prognosis of mandibular third molars spontaneously erupted, through follow-up panoramic analysis. Methods: 22 orthodontic patients treated without extraction, presenting spontaneously erupted mandibular third molars (n = 44) were analyzed through panoramic serial radiographs. The first panoramic radiograph was obtained just after orthodontic treatment (PR1), in patients aging from 13 to 19...

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Treatment of adult patient with hyperdivergent retrognathic phenotype and anterior open bite: report of a case with non-surgical orthodontic approach
Treatment of adult patient with hyperdivergent retrognathic phenotype and anterior open bite: report of a case with non-surgical orthodontic approach

Adult patients with anterior open bite and hyperdivergent retrognathic phenotype demand complex treatments, as premolar extractions, molar intrusion or orthognathic surgery. In the present clinical case, a young adult patient without significant growth, with Class I and anterior open bite, was treated with four premolar extractions. The therapeutic result shows good intercuspidation, good facial esthetic, good function balance, and stability in a two-year post-fixed treatment follow-up.

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Space closure using aligners
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Introduction: Due to the search for more aesthetic and comfortable alternatives to perform orthodontic treatments and to the great technological development, orthodontic aligners have assumed great importance. More and more complex treatments have been carried out with these appliances without, however, having all aspects involved in their use being studied in depth. Its biomechanical planning requires different approaches than those used in fixed orthodontics, as the force systems involved in...

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