Glass transition temperature of hard chairside reline materials after post-polymerisation treatments.
Gerodontology
; 27(3): 230-5, 2010 Sep.
Article
en En
| MEDLINE
| ID: mdl-19555355
OBJECTIVE: This study evaluated the effect of post-polymerisation treatments on the glass transition temperature (T(g)) of five hard chairside reline materials (Duraliner II-D, Kooliner-K, New Truliner-N, Ufi Gel hard-U and Tokuso Rebase Fast-T). MATERIALS AND METHODS: Specimens (10 x 10 x 1 mm) were made following the manufacturers' instructions and divided into three groups (n = 5). Control group specimens were left untreated. Specimens from the microwave group were irradiated with pre-determined power/time combinations, and specimens from the water-bath group were immersed in hot water at 55 degrees C for 10 min. Glass transition ( degrees C) was performed by differential scanning calorimetry. Data were analysed using anova, followed by post hoc Tukey's test (alpha = 0.05). RESULTS: Both post-polymerisation treatments promoted a significant (p < 0.05) increase in the T(g) of reline material K. Materials K, D and N showed the lowest T(g) (p < 0.05). No significant difference between T and U specimens was observed. CONCLUSION: Post-polymerisation treatments improved the glass transition of material Kooliner, with the effect being more pronounced for microwave irradiation.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Materiales Dentales
/
Alineadores Dentales
/
Vidrio
Límite:
Humans
Idioma:
En
Revista:
Gerodontology
Año:
2010
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Reino Unido