Three-dimensional skeletal, dentoalveolar and temporomandibular joint changes produced by Twin Block functional appliance.
J Orofac Orthop
; 79(4): 245-258, 2018 Jul.
Article
em En
| MEDLINE
| ID: mdl-29663034
ABSTRACT
INTRODUCTION:
The aim of this study was to three-dimensionally analyze the net skeletal, dental, and temporomandibular joint (TMJ) treatment changes using Twin Block functional therapy in comparison to untreated subjects. MATERIALS ANDMETHODS:
The study (Twin Block) group comprised 22 female patients with skeletal Class II malocclusion due to mandibular retrusion. A total of 18 skeletal Class II untreated female subjects were included as controls. Skeletal, dental, and TMJ changes were evaluated using pre- and posttreatment/observational by cone beam computed tomography (CBCT) images. The treatment changes were compared with the growth changes observed in the control group using independent ttests.RESULTS:
Compared to the changes induced by normal growth, the effective mandibular length, ramus, and corpus lengths increased by 3.19, 3.47, and 2.69â¯mm (Pâ¯< 0.001 for all), respectively. The maxillary and mandibular incisors inclination and position were significantly reduced and increased, respectively (Pâ¯< 0.001). The maxillary first molars were significantly moved distally and intruded by 1 and 0.36â¯mm, respectively, while the lower first molars moved mesially and intruded by 2.18 and 0.59â¯mm, respectively. There was a significant change in the condylar dimensions increase in length, width, and height by 1.28, 0.88, 1.59 on the right and by 1.60, 0.53, and 1.10â¯mm on the left sides, respectively. There was significant forward positioning of the right and left condyle by 1.5 and 1.3â¯mm, respectively.CONCLUSIONS:
Treatment with the Twin Block functional appliance results in significant skeletal, dentoalveolar, and condylar changes in both dimensions and positions.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Articulação Temporomandibular
/
Aparelhos Ortodônticos Funcionais
/
Registro da Relação Maxilomandibular
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Má Oclusão Classe II de Angle
/
Côndilo Mandibular
Tipo de estudo:
Observational_studies
Limite:
Adolescent
/
Child
/
Female
/
Humans
Idioma:
En
Revista:
J Orofac Orthop
Assunto da revista:
ODONTOLOGIA
/
ORTODONTIA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Egito