Stability of Class II malocclusion treatment with Class II elastics. 2023

Guilherme Janson, and Ana Liesel Guggiari Niederberger, and Gabriela Janson, and Marcelo Vinicius Valerio, and Waleska Caldas, and Fabrício Pinelli Valarelli
Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.

BACKGROUND The objective of this study was to compare the long-term cephalometric stability after successful therapy of nonextraction Class II malocclusion with elastics and with headgear. METHODS The sample comprised 43 patients with Class II malocclusion and was divided into 2 groups. The elastic group (EG) consisted of 20 patients treated with fixed appliances associated with Class II elastics, and the headgear group (HG) consisted of 23 patients treated with fixed appliances and extraoral headgear. Pretreatment, posttreatment, and long-term posttreatment lateral radiographs were evaluated; t tests were used to compare the long-term posttreatment changes between the groups. RESULTS The groups were matched regarding initial age, time of long-term posttreatment evaluation, initial malocclusion severity, quality of treatment result, and all pretreatment cephalometric variables. Intergroup comparisons of long-term posttreatment changes showed that the HG group presented significantly greater mandibular protrusion, occlusal plane angle decrease, and maxillary molar mesialization. However, long-term posttreatment stability was similar in overjet, overbite, and molar relationships. CONCLUSIONS Nonextraction Class II malocclusion treatment with elastics or extraoral headgear have similar long-term posttreatment stability.

UI MeSH Term Description Entries
D008310 Malocclusion Such malposition and contact of the maxillary and mandibular teeth as to interfere with the highest efficiency during the excursive movements of the jaw that are essential for mastication. (Jablonski, Illustrated Dictionary of Dentistry, 1982) Angle's Classification,Crossbite,Tooth Crowding,Cross Bite,Angle Classification,Angles Classification,Bite, Cross,Bites, Cross,Classification, Angle's,Cross Bites,Crossbites,Crowding, Tooth,Crowdings, Tooth,Malocclusions
D008312 Malocclusion, Angle Class II Malocclusion in which the mandible is posterior to the maxilla as reflected by the relationship of the first permanent molar (distoclusion). Angle Class II,Angle Class II, Division 1,Angle Class II, Division 2,Class II Malocclusion, Division 1,Class II Malocclusion, Division 2,Malocclusion, Angle Class II, Division 1,Malocclusion, Angle Class II, Division 2,Class II, Angle
D002508 Cephalometry The measurement of the dimensions of the HEAD. Craniometry
D005115 Extraoral Traction Appliances Extraoral devices for applying force to the dentition in order to avoid some of the problems in anchorage control met with in intermaxillary traction and to apply force in directions not otherwise possible. Chincap, Orthodontic,Face Bow, Orthodontic,Headgear, Orthodontic,Appliance, Extraoral Traction,Appliances, Extraoral Traction,Bow, Orthodontic Face,Bows, Orthodontic Face,Chincaps, Orthodontic,Extraoral Traction Appliance,Face Bows, Orthodontic,Headgears, Orthodontic,Orthodontic Chincap,Orthodontic Chincaps,Orthodontic Face Bow,Orthodontic Face Bows,Orthodontic Headgear,Orthodontic Headgears,Traction Appliance, Extraoral,Traction Appliances, Extraoral
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000077744 Orthodontic Appliances, Fixed ORTHODONTIC APPLIANCES attached to the teeth by adhesive material which cannot be removed from the mouth by the patient. These devices apply force to the teeth and supporting structures, thereby producing changes which control their growth and development. Bonded Retainer,Fixed Appliances,Fixed Functional Appliances,Fixed Retainer,Permanent Retainer,Appliance, Fixed,Appliance, Fixed Functional,Appliance, Fixed Orthodontic,Appliances, Fixed,Appliances, Fixed Functional,Appliances, Fixed Orthodontic,Bonded Retainers,Fixed Appliance,Fixed Functional Appliance,Fixed Orthodontic Appliance,Fixed Orthodontic Appliances,Fixed Retainers,Functional Appliance, Fixed,Functional Appliances, Fixed,Orthodontic Appliance, Fixed,Permanent Retainers,Retainer, Bonded,Retainer, Fixed,Retainer, Permanent,Retainers, Bonded,Retainers, Fixed,Retainers, Permanent
D016896 Treatment Outcome Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series. Rehabilitation Outcome,Treatment Effectiveness,Clinical Effectiveness,Clinical Efficacy,Patient-Relevant Outcome,Treatment Efficacy,Effectiveness, Clinical,Effectiveness, Treatment,Efficacy, Clinical,Efficacy, Treatment,Outcome, Patient-Relevant,Outcome, Rehabilitation,Outcome, Treatment,Outcomes, Patient-Relevant,Patient Relevant Outcome,Patient-Relevant Outcomes
D057887 Overbite A malocclusion in which maxillary incisor and canine teeth project over the mandibular teeth excessively. The overlap is measured perpendicular to the occlusal plane and is also called vertical overlap. When the overlap is measured parallel to the occlusal plane it is referred to as overjet. Deep Bite,Deep-Bite,Incisor Protrusion,Over Bite,Overjet, Dental,Deep Bites,Deep-Bites,Dental Overjet,Dental Overjets,Incisor Protrusions,Over Bites,Overbites,Protrusion, Incisor

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