Browse > Article
http://dx.doi.org/10.5933/JKAPD.2020.47.2.205

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

Ong, Seung-Hwan (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Kim, Jongsoo (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Kim, Jongbin (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Shin, Jisun (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Yoo, Seunghoon (Department of Pediatric Dentistry, College of Dentistry, Dankook University)
Publication Information
Journal of the korean academy of Pediatric Dentistry / v.47, no.2, 2020 , pp. 205-212 More about this Journal
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;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Planells del Pozo P, Fuks AB : Zirconia crowns-an esthetic and resistant restorative alternative for ECC affected primary teeth. J Clin Pediatr Dent, 38:193-195, 2014.   DOI
2 Edelweiss dentistry : Fact sheet - pediatric crown. Available from URL: https://www.edelweissdentistry.com/downloads (Accessed on December 10, 2019).
3 Lee JM, Lee HS, Choi SC, et al. : Three dimensional analysis of primary maxillary central and lateral anterior zirconia crown. J Korean Acad Pediatr Dent, 43:176-186, 2016.
4 Arangannal P, Chandra B, Vijayaprabha, et al. : Enamel thickness in primary teeth. J Clin Pediatr Dent, 37:177-182, 2012.   DOI
5 Seow WK, Young WG, Tsang AKL, Daley T : A study of primary dental enamel from preterm and full-term children using light and scanning electron microscopy. Pediatr Dent, 27:374-379, 2005.
6 Fernandes NA, Vally ZI, Sykes LM : The longevity of restorations-a literature review. SADJ, 70:410-413, 2015.
7 Waggoner WF : Fracture strength of four veneered primary stainless steel crowns. Pediatr Dent, 17:36-40, 1995.
8 Mountain G, Wood D, Toumba J : Bite force measurement in children with primary dentition. Int J Paediatr Dent, 21:112-118, 2011.   DOI
9 Gaviao MBD, Raymundo VG, Rentes AM : Masticatory performance and bite force in children with primary dentition. Braz Oral Res, 21:146-152, 2007.   DOI
10 Nordahl N, von Steyern PV, Larsson C : Fracture strength of ceramic monolithic crown systems of different thickness. J Oral Sci, 57:255-261, 2015.   DOI
11 Al-Juaila E, Osman E, Farghaly EA, et al. : Comparison of translucency for different thicknesses of recent types of esthetic zirconia ceramics versus conventional ceramics (in vitro study). Future Dent J, 4:297-301, 2018.   DOI
12 American Academy of Pediatric Dentistry Clinical Affairs Committee-Restorative Dentistry Subcommittee : Guideline on pediatric restorative dentistry. Pediatr Dent, 34:173-180, 2012.
13 Sagsoz NP, Yanikoglu N : Evaluation of the fracture resistance of computer-aided design/computer-aided manufacturing monolithic crowns prepared in different cement thicknesses. Niger J Clin Pract, 21:417-422, 2018.
14 Bayindir F, Koseoglu M : The effect of restoration thickness and resin cement shade on the color and translucency of a high-translucent monolithic zirconia. J Prosthet Dent, 123:149-154, 2020.   DOI
15 Anil S, Anand PS : Early childhood caries: prevalence, risk factors, and prevention. Front Pediatr, 5:157, 2017.   DOI
16 Waggoner WF : Restoring primary anterior teeth. Pediatr Dent, 24:511-516, 2002.
17 O'Sullivan DM, Tinanoff N : Maxillary anterior caries associated with increased caries risk in other primary teeth. J Dent Res, 72:1577-1580, 1993.   DOI
18 Kim SY, Lim YJ, Jih MK, et al. : Comparison of crown shape and amount of tooth reduction for primary anterior prefabricated crowns. J Korean Acad Pediatr Dent, 46:64-75, 2019.
19 Machado E, Dal-Fabbro C, Cunali PA, Kaizer OB : Prevalence of sleep bruxism in children: A systematic review. Dental Press J Orthod, 19:54-61, 2014.
20 Hedge S, Panwar S, Bolar DR, Sanghavi MB : Characteristics of occlusion in primary dentition of preschool children of Udaipur, India. Eur J Dent, 6:51-55, 2012.   DOI
21 Choi JW, Bae IH, Huh JB, et al. : Wear of primary teeth caused by opposed all-ceramic or stainless steel crowns. J Adv Prosthodont, 8:43-52, 2016.   DOI
22 Zilich C : Fracture resistance of CAD/CAM restorations on anterior primary teeth. PhD Thesis, UCSF, 2015.
23 Clark L, Wells MH, Harris EF, Lou J : Comparison of amount of primary tooth reduction required for anterior and posterior zirconia and stainless steel crowns. Pediatr Dent, 38:42-46, 2016.
24 Davidowitz G, Kotick PG : The use of CAD/CAM in dentistry. Dent Clin North Am, 55:559-570, 2011.   DOI
25 Miyazaki T, Nakamura T, Kobayashi T, et al. : Current status of zirconia restoration. J Prosthodont Res, 57:236-261, 2013.   DOI