Accuracy of provisional crowns made using stereolithography apparatus and subtractive technique
The Journal of Advanced Prosthodontics
;
: 354-360, 2018.
Artigo
em Inglês
| WPRIM
| ID: wpr-742057
ABSTRACT
PURPOSE:
To compare and analyze trueness and precision of provisional crowns made using stereolithography apparatus and subtractive technology. MATERIALS ANDMETHODS:
Digital impressions were made using a master model and an intraoral scanner and the crowns were designed with CAD software; in total, 22 crowns were produced. After superimposing CAD design data and scan data using a 3D program, quantitative and qualitative data were obtained for analysis of trueness and precision. Statistical analysis was performed using normality test combined with Levene test for equal variance analysis and independent sample t-test. Type 1 error was set at 0.05.RESULTS:
Trueness for the outer and inner surfaces of the SLA crown (SLAC) were 49.6±9.3 µm and 22.5±5.1 µm, respectively, and those of the subtractive crown (SUBC) were 31.8±7.5 µm and 14.6±1.2 µm, respectively. Precision values for the outer and inner surfaces of the SLAC were 18.7±6.2 µm and 26.9±8.5 µm, and those of the SUBC were 25.4±3.1 µm and 13.8±0.6 µm, respectively. Trueness values for the outer and inner surfaces of the SLAC and SUBC showed statistically significant differences (P < .001). Precision for the inner surface showed significance (P < .03), whereas that for the outer surface showed no significance (P < .58).CONCLUSION:
The study demonstrates that provisional crowns produced by subtractive technology are superior to crowns fabricated by stereolithography in terms of accuracy.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Coroas
Tipo de estudo:
Pesquisa qualitativa
Idioma:
Inglês
Revista:
The Journal of Advanced Prosthodontics
Ano de publicação:
2018
Tipo de documento:
Artigo
Similares
MEDLINE
...
LILACS
LIS