Removal torque of sandblasted large grit, acid etched treated mini-implant / 대한치과교정학회지
Korean Journal of Orthodontics
; : 324-330, 2006.
Article
em Ko
| WPRIM
| ID: wpr-652081
Biblioteca responsável:
WPRO
ABSTRACT
OBJECTIVE: The purposes of this study were to evaluate the differences between sand blasted, large grit and acid-etched (SLA) treated mini-implants and smooth surface orthodontic mini-implants in relation to the removal torque as well as the histologic analysis. METHODS: Custom-made, screw-shaped, titanium implants with a length of 9.5 mm and an outer diameter of 1.8 mm were divided into 2 groups; the SLA group (20 SLA treated orthodontic mini-implants) and the smooth surface group (20 smooth surface mini-implants), and placed in the tibia metaphysis of 10 rabbits. Each rabbit had 4 mini-implants placed, 2 in each tibia. The right tibia were implanted with the SLA group mini-implants and the left tibia had the smooth group mini-implants placed. Each mini-implant group were immediately applied with a continuous traction force of 150 g using a Ni-Ti coil spring. The rabbits were sacrificed 6 weeks post-surgically. Subsequently, the legs were stabilized, the Ni-Ti coil springs were removed and the mini-implants were removed under reverse torque rotation with a digital torque gauge. RESULTS: 6 weeks after placement, the SLA group presented a higher mean removal torque value (8.29 Ncm) than the smooth group (3.34 Ncm) and histologic analysis revealed a higher new bone formation aspect along the screw in the SLA group. CONCLUSION: Results of this study indicates that SLA treated mini-implants may endure higher orthodontic forces without loosening.
Palavras-chave
Texto completo:
1
Índice:
WPRIM
Assunto principal:
Osteogênese
/
Tíbia
/
Titânio
/
Tração
/
Dióxido de Silício
/
Torque
/
Perna (Membro)
Limite:
Animals
Idioma:
Ko
Revista:
Korean Journal of Orthodontics
Ano de publicação:
2006
Tipo de documento:
Article