The effect of varying healing times on orthodontic mini-implant stability: a microscopic computerized tomographic and biomechanical analysis.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
; 112(4): 423-9, 2011 Oct.
Article
em En
| MEDLINE
| ID: mdl-21310631
ABSTRACT
OBJECTIVE:
The aim of this study was to evaluate the effect of different healing times on the stability of titanium mini-implants used for orthodontic anchorage. STUDYDESIGN:
Eight male beagles were used and randomized into 4 groups according to different healing times (1, 3, 5, and 7 weeks); each group had 2 beagles. Sixty-four mini-implants were inserted bilaterally in the maxilla and mandible of the beagles. Microscopic computerized tomography (µCT) and pull-out test were used for morphometric and biomechanical analysis, respectively.RESULTS:
All µCT parameters and F(max) (maximum pull-out force) increased with the prolongation of healing time. One week after insertion, all 4 measurements, namely osseointegration, trabecular bone volume density, intersection surface, and F(max), were lower in the maxilla group than in the mandible group (P < .05). Between the span of 1 and 3 weeks after insertion, a more obvious rising tendency of the 4 values was observed in the maxilla group than in the mandible group. Five and 7 weeks after insertion, the maxilla group expressed higher values of the 4 measurements than the mandible group (P < .05).CONCLUSIONS:
Although insertion in the mandible could provide higher primary stability for mini-implants, with the prolongation of healing time, insertion in the maxilla achieves higher osseointegration. The results indicated that insertion in maxilla has a more positive effect on the stability of mini-implants than insertion in the mandible.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Implantes Dentários
/
Procedimentos de Ancoragem Ortodôntica
/
Microtomografia por Raio-X
Limite:
Animals
Idioma:
En
Revista:
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
China