Histomorphometric and biomechanical analyses of the osseointegration of loaded orthodontic microscrews inserted at different cortical bone thickness sites.
Oral Surg Oral Med Oral Pathol Oral Radiol
; 118(2): 157-65, 2014 Aug.
Article
em En
| MEDLINE
| ID: mdl-23022026
ABSTRACT
OBJECTIVES:
The aim of this study was to evaluate the osseointegration of loaded orthodontic microscrews at different cortical bone thickness (CBT) sites. STUDYDESIGN:
Forty-eight microscrews were inserted bilaterally in the tibias of 12 beagles, and divided into thick and thin CBT group. After 1, 3, 5, and 7 weeks, the dogs were killed and bone-screw specimens prepared for polyfluorochrome sequential labeling, microscopic computerized tomography (µCT) analysis, and biomechanical pull-out testing.RESULTS:
All µCT parameters were increased in the thin CBT group, and decreased in the thick CBT group with time passed. Fmax of microscrews in thick CBT sites reached a peak in week 1, but dropped to lowest levels in week 3. Remodeling, apposition, and measured deposition areas of 3 labels were significantly higher in the thin CBT group than in the thick CBT group (P < .05).CONCLUSIONS:
Relatively larger CBT is of benefit for primary stability at early time points, whereas thinner CBT is more appropriate for achieving long-term stability with prolonged time.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Parafusos Ósseos
/
Osseointegração
/
Procedimentos de Ancoragem Ortodôntica
Limite:
Animals
Idioma:
En
Revista:
Oral Surg Oral Med Oral Pathol Oral Radiol
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
China