Effect of placement angle on the stability of loaded titanium microscrews in beagle jaws.
Angle Orthod
; 83(4): 659-66, 2013 Jul.
Article
em En
| MEDLINE
| ID: mdl-23216057
ABSTRACT
OBJECTIVE:
To evaluate the effect of insertion angle on stability of loaded titanium microscrews in beagle jaws. MATERIALS ANDMETHODS:
Forty-eight microscrews were inserted at four different angles (30°, 50°, 70°, and 90°) into the intraradicular zones of the mandibular first molars and third premolars of 12 beagles and immediately loaded with a force of 2 N for 8 weeks. Microcomputed tomography (micro-CT) and biomechanical pull-out tests were used to assess osseointegration of the interface.RESULTS:
All micro-CT parameters and maximum pull-out force (FMAX) of the microscrews were affected by insertion angles of microscrews. Higher micro-CT parameters and FMAX were seen for implants inserted at angles between 50° and 70° (P < .05). Excessive oblique and vertical insertion angles resulted in reduced stability (P < .05).CONCLUSION:
An insertion angle of 50° to 70° is more favorable than excessive oblique or vertical angles to achieve stability of microscrews.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Titânio
/
Parafusos Ósseos
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Materiais Dentários
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Procedimentos de Ancoragem Ortodôntica
/
Mandíbula
Limite:
Animals
Idioma:
En
Revista:
Angle Orthod
Ano de publicação:
2013
Tipo de documento:
Article