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Am J Orthod Dentofacial Orthop ; 150(4): 557, 2016 10.
Artículo en Inglés | MEDLINE | ID: mdl-27692407
Prog Orthod ; 17(1): 32, 2016 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-27667817


BACKGROUND: The purpose of this study was to determine differences in cortical bone thickness among subjects with different vertical facial dimensions using cone beam computed tomography (CBCT). METHODS: From 114 pre-treatment CBCT scans, 48 scans were selected to be included in the study. CBCT-synthesized lateral cephalograms were used to categorize subjects into three groups based on their vertical skeletal pattern. Cortical bone thickness (CBT) at two vertical levels (4 and 7 mm) from the alveolar crest were measured in the entire tooth-bearing region in the maxilla and mandible. RESULTS: Significant group differences were detected with high-angle subjects having significantly narrower inter-radicular CBT at some sites as compared to average- and low-angle subjects. CONCLUSIONS: Inter-radicular cortical bone is thinner in high-angle than in average- or low-angle subjects in few selected sites at the vertical height in which mini-implants are commonly inserted for orthodontic anchorage.

Tomografía Computarizada de Haz Cónico/métodos , Hueso Cortical/anatomía & histología , Hueso Cortical/diagnóstico por imagen , Cara/anatomía & histología , Cara/diagnóstico por imagen , Dimensión Vertical , Adolescente , Adulto , Proceso Alveolar/anatomía & histología , Proceso Alveolar/diagnóstico por imagen , Cefalometría/métodos , Arco Dental/anatomía & histología , Implantes Dentales , Femenino , Humanos , Imagenología Tridimensional/métodos , Incisivo/diagnóstico por imagen , Masculino , Mandíbula/anatomía & histología , Mandíbula/diagnóstico por imagen , Maxilar/anatomía & histología , Maxilar/diagnóstico por imagen , Diente/anatomía & histología , Adulto Joven
Am J Orthod Dentofacial Orthop ; 150(2): 210-1, 2016 08.
Artículo en Inglés | MEDLINE | ID: mdl-27476348
Am J Orthod Dentofacial Orthop ; 149(4): 473-80, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-27021451


INTRODUCTION: The purpose of this study was to evaluate the efficiency of corticotomy-facilitated orthodontics and piezocision in rapid canine retraction. METHODS: The sample consisted of 20 patients (15-25 years old) with Class II Division 1 malocclusions. The suggested treatment plan was extraction of the maxillary first premolars with subsequent canine retraction. The sample was divided into 2 equal groups. In the first group, 1 side of the maxillary arch was randomly chosen for treatment with corticotomy, and in the second group, piezocision treatment was used. The contralateral sides of both groups served as the controls. Cuts and perforations were performed with a piezotome, and canine retraction was initiated bilaterally in both groups with closed-coil nickel-titanium springs that applied 150 g of force on each side. The following variables were examined over a 3-month follow-up period: rate of canine crown tip, molar anchorage loss, canine rotation, canine inclination, canine root resorption, plaque index, gingival index, probing depth, attachment level, and gingival recession. The rate of canine crown tip was assessed every 2 weeks after the start of canine retraction at 6 time points. RESULTS: The rates of canine crown tip were greater in the experimental sides than in the control sides in both groups. Corticotomies produced greater rates of canine movement than did piezocision at 4 time points. Canine root resorption was greater in the control sides. The remaining studied variables exhibited no differences between the control and the experimental sides. CONCLUSIONS: Corticotomy-facilitated orthodontics and piezocision are efficient treatment modalities for accelerating canine retraction.

Diente Canino/patología , Maxilar/cirugía , Osteotomía/métodos , Piezocirugía/métodos , Técnicas de Movimiento Dental/métodos , Adolescente , Adulto , Diente Premolar/cirugía , Aleaciones Dentales/química , Índice de Placa Dental , Estudios de Seguimiento , Recesión Gingival/etiología , Humanos , Maloclusión de Angle Clase II/terapia , Diente Molar/patología , Níquel/química , Métodos de Anclaje en Ortodoncia/métodos , Alambres para Ortodoncia , Pérdida de la Inserción Periodontal/etiología , Índice Periodontal , Bolsa Periodontal/etiología , Resorción Radicular/etiología , Titanio/química , Corona del Diente/patología , Extracción Dental/métodos , Técnicas de Movimiento Dental/instrumentación , Resultado del Tratamiento , Adulto Joven