Fracture Strength and Translucency of CAD/CAM Zirconia Crown for Primary Anterior Tooth (CAD/CAM으로 제작한 유전치 지르코니아 전장관의 두께에 따른 파절강도와 반투명도 비교)

Seung-Hwan Ong (옹승환); Jong-Soo Kim (김종수); Kim Jongbin (김종빈); JISUN SHIN (신지선); Seunghoon Yoo (유승훈)

doi:10.5933/JKAPD.2020.47.2.205

Fracture Strength and Translucency of CAD/CAM Zirconia Crown for Primary Anterior Tooth

Journal of the Korean academy of pediatric dentistry
Abbr : J Korean Acad Pediatr Dent
2020, 47(2), pp.205-212
DOI : 10.5933/JKAPD.2020.47.2.205
Publisher : The Korean Academy Of Pediatric Dentistry
Research Area : Medicine and Pharmacy > Dentistry
Received : December 19, 2019
Accepted : February 3, 2020
Published : May 29, 2020

Seung-Hwan Ong ¹, Jong-Soo Kim ², Kim Jongbin ², JISUN SHIN ², Seunghoon Yoo ²

¹단국대학교 치과대학
²단국대학교

Accredited

ABSTRACT

The purpose of this study is to evaluate the validity of primary anterior zirconia crown made with Computer Aided Design/Computer Aided Manufacturing (CAD/CAM) technology by analyzing fracture strength and translucency parameter. Zirconia crown was designed with CAD software, using 3D scanned data of #61 tooth model. Crown fabrication was performed with CAM machine using zirconia block. Zirconia crowns were divided into 3 groups according to thickness(0.3, 0.5, and 0.7 mm), and fracture strength was compared with 1.0 mm thickness of resin strip crown. The compressive force was applied with universal testing machine at 30° along the incisal edge at increments of 1 mm/min. For translucency evaluation, 0.3, 0.5, and 0.7 mm thickness of zirconia specimens were fabricated and translucency was measured with spectrophotometer. Among zirconia groups, there was a significant increase in fracture strength as thickness increased (p < 0.05). The fracture strength of zirconia crown was significantly higher than resin strip crown in all groups (p < 0.05). Translucency parameter was highest in 0.3 mm group, and significantly decreased as thickness increased to 0.5 and 0.7 mm (p < 0.05). Thin primary anterior zirconia crown can be designed and fabricated according to individual needs by using CAD/CAM. Restoration with thin crown would reduce the amount of tooth reduction, risk of pulp exposure, and make more esthetic restoration possible.

KEYWORDS

CAD/CAM, Zirconia crown, Primary teeth, Esthetic restoration

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Journal of the Korean academy of pediatric dentistry 2023 KCI Impact Factor : 0.48

Fracture Strength and Translucency of CAD/CAM Zirconia Crown for Primary Anterior Tooth

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* References for papers published after 2023 are currently being built.

Journal of the Korean academy of pediatric dentistry 2023 KCI Impact Factor : 0.48

Fracture Strength and Translucency of CAD/CAM Zirconia Crown for Primary Anterior Tooth

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