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1.
Am J Orthod Dentofacial Orthop ; 158(4): 599-611, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32988568

RESUMEN

Growth modification is a feasible approach for the treatment of skeletal Class II malocclusion. A positive association was found between the lateral functional shift of the mandible due to occlusal prematurities and skeletal changes. This finding is reminiscent of an equivalent anteroposterior skeletal effect of the anterior functional shift of the mandible. Inclined planes can be considered as a form of premature contact. In this case, bonded occlusal maxillary and mandibular bite raisers were used to create occlusal prematurities artificially. These bonded inclined bite raisers are used in conjunction with full-time light short Class II elastics. The results showed an improvement in profile convexity and achievement of Class I canines and molars. The bonded inclined bite raisers combined with light and short intermaxillary elastics can correct Class II malocclusion and improve the soft tissue profile.


Asunto(s)
Maloclusión de Angle Clase II/diagnóstico por imagen , Maloclusión de Angle Clase II/terapia , Cefalometría , Oclusión Dental , Humanos , Mandíbula , Maxilar
2.
World J Orthod ; 9(2): 141-6, 2008.
Artículo en Inglés | MEDLINE | ID: mdl-18575308

RESUMEN

AIM: To compare the effect on the shear bond strength of orthodontic brackets when applying Pro Seal light-cure varnish to the enamel surface either before or after the application of sealant. METHODS: Sixty noncarious premolars were randomly divided into 3 equal groups. In groups I and 2, Pro Seal, a fluoride-releasing light-cure varnish, was applied to the enamel surface before or after, respectively, the sealant provided with the adhesive, while group 3 (control) was bonded regularly using only the sealant supplied with the adhesive. Mono-Lok 2 no-mix bonding system was used to bond stainless steel brackets to each tooth. All teeth were embedded in self-cure acrylic, placed in steel rings, and secured in a jig attached to the base plate of a universal testing machine. A perpendicular force was applied to the bracket at a crosshead speed of 0.5 mm/min. The residual adhesive on the enamel surface was evaluated after debonding with the adhesive remnant index. RESULTS: The mean shear bond strength for group 1, treated with Pro Seal varnish before the sealant, was 10.06 +/- 3.11 MPa. However, for group 2, where varnish was applied after the sealant, the mean shear bond strength was 12.78 +/- 3.7 MPa, while it was 12.81 +/- 2.6 MPa for the control group. An analysis of variance test showed that the mean shear bond strengths of the 3 groups were not significantly different. The chi-square test evaluating the residual adhesive on enamel surfaces showed no significant differences between all groups. CONCLUSIONS: Application of Pro Seal before or after the sealant did not reduce the mean shear bond strength of orthodontic brackets. However, further studies are recommended to compare the amount of enamel protection offered in either situation.


Asunto(s)
Recubrimiento Dental Adhesivo , Soportes Ortodóncicos , Cementos de Resina/química , Adhesividad , Diente Premolar , Cariostáticos/química , Resinas Compuestas/química , Esmalte Dental/ultraestructura , Fluoruros/química , Humanos , Ensayo de Materiales , Resistencia al Corte , Acero Inoxidable/química , Estrés Mecánico , Propiedades de Superficie
3.
World J Orthod ; 5(2): 133-40, 2004.
Artículo en Inglés | MEDLINE | ID: mdl-15615131

RESUMEN

AIMS: To investigate the efficacy of the anterior repositioning splint and the canine-protected splint in relieving the signs and symptoms of anterior disc displacement with reduction, and to evaluate the effects of both splints on disc position using a standardized magnetic resonance imaging measurement technique. MATERIAL AND METHODS: A sample of 18 adult subjects was studied. The joint disorder was dually diagnosed via pretreatment clinical examination and magnetic resonance imaging. The sample was randomly divided into two groups. In the first group, each subject received an anterior repositioning splint; in the second group, each subject received a canine-protected splint. The treatment lasted 3 months. A standardized magnetic resonance imaging 10-step procedure was developed. Posttreatment clinical examinations and magnetic resonance imagings were done. Pretreatment and posttreatment records were statistically compared. RESULTS AND CONCLUSIONS: Both types of splints were effective in eliminating pain and clicking. All magnetic resonance imaging measurements showed that the canine-protected splint was superior to the anterior repositioning splint, as it allowed the articular disc to resume its normal length and shape while moving in a posterior direction toward recapture. Disc recapture was demonstrated via magnetic resonance imaging in 25% of the subjects from the anterior repositioning splint group, in 40% of the subjects from the canine-protected splint group, and in 33.3% of the subjects from both groups. Thus, noninvasive treatment techniques (such as occlusal splint therapy) might be the treatment of choice for anterior disc displacement with reduction.


Asunto(s)
Luxaciones Articulares/terapia , Imagen por Resonancia Magnética , Ferulas Oclusales , Disco de la Articulación Temporomandibular/patología , Trastornos de la Articulación Temporomandibular/terapia , Adolescente , Adulto , Oclusión Dental , Oclusión Dental Céntrica , Método Doble Ciego , Diseño de Equipo , Dolor Facial/terapia , Estudios de Seguimiento , Humanos , Luxaciones Articulares/patología , Cóndilo Mandibular/patología , Ferulas Oclusales/clasificación , Trastornos de la Articulación Temporomandibular/patología
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