[Application of the pin-hole marker measurement of the irregular silicone impression accuracy].
Shanghai Kou Qiang Yi Xue
; 21(3): 261-5, 2012 Jun.
Article
en Zh
| MEDLINE
| ID: mdl-22885483
ABSTRACT
PURPOSE:
To investigate the feasibility of the pin-hole marker measurement of the irregular silicone dental impression accuracy.METHODS:
The metal model simulating abutment preparations had triangle-formed circular needles on the surface. Two silicone impressions were made by the metal model with the corresponding pin-hole markers. The dimensional change of the markers was evaluated by stereomicroscope. The records were output by the software which could simulate the centre of a circle to measure the displacement and dimensional accuracy.RESULTS:
The outline of pin-hole marker was clear and shape was stable. Values of center coordinates were repeated well. The percentage of linear dimensional change of two impression samples was 0.023% and 0.042% at 48h respectively. Between two abutment preparations, the percentage of linear dimensional change of Zhermeck silicone impression increased 0.214% (45.1µm) at 1h and decreased 0.019% (4.0µm) at 48h while 3M silicone impression increased 0.087%(18.2µm) at 1h and decreased 0.09% (18.8µm) at 48h.CONCLUSION:
The pin-hole marker measurement of the irregular silicone impression accuracy was feasible.
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Bases de datos:
MEDLINE
Asunto principal:
Siliconas
/
Materiales de Impresión Dental
Idioma:
Zh
Revista:
Shanghai Kou Qiang Yi Xue
Asunto de la revista:
ODONTOLOGIA
Año:
2012
Tipo del documento:
Article
País de afiliación:
China