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Accuracy of zirconia crown manufactured using stereolithography and digital light processing.
Lee, Ha-Bin; Noh, Mi-Jun; Bae, Eun-Jeong; Lee, Wan-Sun; Kim, Ji-Hwan.
Afiliación
  • Lee HB; Transdisciplinary Major in Learning Health Systems, Department of Healthcare Sciences, Graduate School, Korea University, Hana Sciences Hall B #374, 145, Anam-ro, Seongbuk-gu, Seoul, Korea.
  • Noh MJ; Transdisciplinary Major in Learning Health Systems, Department of Healthcare Sciences, Graduate School, Korea University, Hana Sciences Hall B #374, 145, Anam-ro, Seongbuk-gu, Seoul, Korea.
  • Bae EJ; Department Of Dental Technology, Bucheon University, 56, Sosa-ro, Bucheon, Gyeonggi-do, Korea.
  • Lee WS; Department Of Dental Technology, Bucheon University, 56, Sosa-ro, Bucheon, Gyeonggi-do, Korea.
  • Kim JH; Transdisciplinary Major in Learning Health Systems, Department of Healthcare Sciences, Graduate School, Korea University, Hana Sciences Hall B #374, 145, Anam-ro, Seongbuk-gu, Seoul, Korea. Electronic address: kjh2804@korea.ac.kr.
J Dent ; 141: 104834, 2024 02.
Article en En | MEDLINE | ID: mdl-38217958
ABSTRACT

OBJECTIVES:

The aim of this study is to evaluate the accuracy of zirconia crowns fabricated using stereolithography (SLA) and digital light processing (DLP) and to compare their accuracy with those fabricated using the subtractive manufacturing (SM) method.

METHODS:

A typodont model with a prepared maxillary first molar was scanned, and the anatomical contour crown was designed using dental computer-aided-design (CAD) software. The designed file in standard tessellation language (STL) format was used to fabricate 10 crowns per group. The crowns were manufactured using a dental milling machine (Datron D5; MLC group), SLA (CERAMAKER 900; SLAC group), and DLP (ZIPRO; DLPC group) printers. The fabricated crowns were scanned using a dental laboratory scanner and saved in three parts the external, intaglio, and marginal surfaces. For accuracy assessment, these parts were superimposed to the reference file. Root mean square (RMS) values were evaluated using three-dimensional analysis software (Geomagic Control X). Statistical significance was evaluated using a nonparametric Kruskal-Wallis test (α = 0.05) and a post-hoc Mann-Whitney U test with Bonferroni correction (α = 0.016).

RESULTS:

Trueness evaluation revealed the lowest RMS value in all areas in the MLC group, followed by that in the DLPC group. The precision evaluation revealed the lowest RMS value in all areas in the MLC group. Statistically significant differences were observed among the groups in the external, intaglio, and marginal surface (P < 0.05).

CONCLUSIONS:

Although the restorations fabricated using SM revealed higher accuracy, the crowns manufactured using SLA and DLP methods were considered clinically acceptable. CLINICAL

SIGNIFICANCE:

In the production of zirconia crowns, subtractive manufacturing continues to demonstrate significantly higher accuracy compared to additive manufacturing. However, crowns fabricated using the additive manufacturing method also demonstrated high accuracy.
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Texto completo: 1 Base de datos: MEDLINE Asunto principal: Circonio / Diseño de Prótesis Dental / Estereolitografía Idioma: En Revista: J Dent Año: 2024 Tipo del documento: Article

Texto completo: 1 Base de datos: MEDLINE Asunto principal: Circonio / Diseño de Prótesis Dental / Estereolitografía Idioma: En Revista: J Dent Año: 2024 Tipo del documento: Article