Implant-supported titanium framework: photoelastic analysis before and after spark erosion procedure
Braz. j. oral sci
;
9(1): 48-53, Jan.-Mar. 2010. ilus
Artigo
em Inglês
| LILACS, BBO
| ID: lil-578047
ABSTRACT
Aim:
This study used a photoelastic analysis to evaluate the passive fit of titanium cast laserwelding frameworks before and after spark erosion procedure.Methods:
A stainless steel castwas used in order to reproduce a human mandible. Five Multi-Unit abutment analogs wereattached to this cast and 6 frameworks were produced in commercial pure titanium. The cast wasmolded and a photoelastic matrix was produced incorporating 5 dental implants with Multi-Unitabutments. All samples were subjected to a laser welding. The precision of adjustments within arange of 0.5 ìm was evaluated under microscope observation. The best fitted framework wasselected and subjected to a photoelastic analysis (Group I). The tightening of the screws was in 3predetermined sequences (1,2,3,4,5/ 5,4,3,2,1/ 3,2,4,1,5). Then the same framework wassubjected to a refinement by spark erosion technique (Group II) and evaluated by photoelasticanalysis.Results:
The sequence (3,2,4,1,5) achieved better results in both groups. A largernumber of fringes were observed around the median implants in all sequences in both groups.Conclusions:
The titanium cast laser welded frameworks processes associated with spark erosionprocedure improves significantly the marginal framework adaptation and is effective for its passive fit.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Titânio
/
Planejamento de Prótese Dentária
/
Prótese Dentária Fixada por Implante
/
Análise do Estresse Dentário
Idioma:
Inglês
Revista:
Braz. j. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2010
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
State University of Campinas/BR
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