Do dual-thread orthodontic mini-implants improve bone/tissue mechanical retention?
Implant Dent
; 23(6): 653-8, 2014 Dec.
Article
em En
| MEDLINE
| ID: mdl-25290278
ABSTRACT
PURPOSE:
The aim of this study was to understand whether the pitch relationship between micro and macro thread designs with a parametrical relationship in a dual-thread mini-implant can improve primary stability. MATERIALS ANDMETHODS:
Three types of mini-implants consisting of single-thread (ST) (0.75 mm pitch in whole length), dual-thread A (DTA) with double-start 0.375 mm pitch, and dual-thread B (DTB) with single-start 0.2 mm pitch in upper 2-mm micro thread region for performing insertion and pull-out testing. Histomorphometric analysis was performed in these specimens in evaluating peri-implant bone defects using a non-contact vision measuring system.RESULTS:
The maximum inserted torque (Tmax) in type DTA was found to be the smallest significantly, but corresponding values found no significant difference between ST and DTB. The largest pull-out strength (Fmax) in the DTA mini-implant was found significantly greater than that for the ST mini-implant regardless of implant insertion orientation. Mini-implant engaged the cortical bone well as observed in ST and DTA types.CONCLUSION:
Dual-thread mini-implant with correct micro thread pitch (parametrical relationship with macro thread pitch) in the cortical bone region can improve primary stability and enhanced mechanical retention.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Implantes Dentários
/
Planejamento de Prótese Dentária
/
Implantação Dentária Endóssea
Limite:
Animals
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article