Light Transmission for a Novel Chairside CAD/CAM Lithium Disilicate Ceramic
Carlos A Jurado, Clarisa Amarillas-Gastelum, Akimasa Tsujimoto, Saad Alresayes, Kennedee French, Hamid Nurrohman
Citation Information :
Jurado CA, Amarillas-Gastelum C, Tsujimoto A, Alresayes S, French K, Nurrohman H. Light Transmission for a Novel Chairside CAD/CAM Lithium Disilicate Ceramic. J Contemp Dent Pract 2021; 22 (12):1365-1369.
Aim: To evaluate light transmission in a novel chairside CAD/CAM lithium disilicate ceramic with different thicknesses and with and without polishing.
Materials and methods: Sixty flat samples (10 specimens/group) were fabricated from novel chairside CAD/CAM lithium disilicate ceramic blocks (Amber Mill, Hass Bio) with different thicknesses and with and without polishing as follows: (1) 1.0 mm thickness without polishing (1.0NoP); (2) 1.0 mm thickness with polishing (1.0Po); (3) 1.5 mm thickness without polishing (1.5NoP); (4) 1.5 mm thickness with polishing (1.5Po); (5) 2.0 mm thickness without polishing (2.0NoP); and (6) 2.0 mm thickness with polishing (2.0Po). Specimens were polished with a polishing system for lithium disilicate restorations following the manufacturer's recommendations. Light transmission was evaluated with a curing radiometer. Obtained data were subjected to two-way ANOVA followed by Tukey's post hoc tests (α = 0.05). SEM observations were conducted to evaluate surface microstructure.
Results: The light intensity through the lithium disilicate blocks with and without polishing was 200.9 mW/cm2 (16.1%) and 194.4 mW/cm2 (15.6%) for 1.0 mm specimens, 119.3 mW/cm2 (9.5%) and 111.9 mW/cm2 (9.0%) for 1.5 mm specimens, and 102.3 mW/cm2 (8.2%) and 96.0 mW/cm2 (7.7%) for 2.0 mm specimens. SEM images showed a smoother surface with polishing compared to nonpolished specimens.
Conclusion: The thickness and polishing of the restorations were both significant influential factors in light transmission.
Clinical significance: The range of light transmission percentage through the novel chairside CAD/CAM lithium disilicate blocks was 7.7–16.1%, suggesting that light attenuation through the material may influence the polymerization reaction of resin luting cement in the bonding process.
Blatz MB, Conejo J. The current state of chairside digital dentistry and materials. Dent Clin North Am 2019;63(2):175–197. DOI: 10.1016/j.cden.2018.11.002.
Miyazaki T, Hotta Y, Kunii J, et al. A review of dental CAD/CAM: current status and future perspectives from 20 years of experience. Dent Mater J 2009;28(1):44–56. DOI: 10.4012/dmj.28.44.
Jurado CA, Mourad F, Felton D, et al. Clinical workflow of two different CAD/CAM systems for veneers manufacture. Eur J Gen Dent 2020;9(3):174–180. DOI: 10.4103/ejgd.ejgd_216_19.
Jurado CA, Tsujimoto A, Watanabe H, et al. Chair-side CAD/CAM fabrication of a single-retainer resin bonded fixed dental prosthesis: a case report. Restor Dent Endod 2020;45(2):e15. DOI: 10.5395/rde.2020.45.e15.
Jurado CA, Tsujimoto A, Punj A, et al. Successful development and implementation of a digital dentistry curriculum at a US dental school. J Oral Sci 2021;63(4):358–360. DOI: 10.2334/josnusd.21-0070.
Moussally C, Fron-Chabouis H, Charrière A, et al. Full-mouth rehabilitation of hypocalcified-type amelogenesis imperfecta with chairside computer-aided design and computer-aided manufacturing: a case report. Oper Dent 2019;44(3):E145–E58. DOI: 10.2341/17-241-T.
Saeidi Pour R, Edelhoff D, Prandtner O, et al. Rehabilitation of a patient with amelogenesis imperfecta using porcelain veneers and CAD/CAM polymer restorations: a clinical report. Quintessence Int 2015;46(10):843–852. DOI: 10.3290/j.qi.a34721.
Sulaiman TA. Materials in digital dentistry–a review. J Esthet Restor Dent 2020;32(2):171–181. DOI: 10.1111/jerd.12566.
Spitznagel FA, Boldt J, Gierthmuehlen PC. CAD/CAM ceramic restorative materials for natural teeth. J Dent Res 2018;97(10): 1082–1091. DOI: 10.1177/0022034518779759.
Jurado CA, Kaleinikova Z, Tsujimoto A, et al. Comparison of fracture resistance for chairside CAD/CAM lithium disilicate crowns and overlays with different designs. J Prosthodont 2021. DOI: 10.1111/jopr.13411.
Chen Y, Yeung AWK, Pow EHN, et al. Current status and research trends of lithium disilicate in dentistry: a bibliometric analysis. J Prosthet Dent 2021;126(4):512–522. DOI: 10.1016/j.prosdent.2020.08.012.
Tian T, Tsoi JK, Matinlinna JP, et al. Aspects of bonding between resin luting cements and glass ceramic materials. Dent Mater 2014;30(7):e147–e162. DOI: 10.1016/j.dental.2014.01.017.
Yin R, Jang YS, Lee MH, et al. Comparative evaluation of mechanical properties and wear ability of five CAD/CAM dental blocks. Materials (Basel) 2019;12(14). DOI: 10.3390/ma12142252.
Clausson C, Schroeder CC, Goloni PV, et al. Fracture resistance of CAD/CAM lithium disilicate of endodontically treated mandibular damaged molars based on different preparation designs. Int J Biomater 2019;2019:2475297. DOI: 10.1155/2019/2475297.
Pereira CN, De Magalhães CS, Daleprane B, et al. LED and halogen light transmission through a CAD/CAM lithium disilicate glass-ceramic. Braz Dent J 2015;26(6):648–653. DOI: 10.1590/0103-6440201300367.
Kilinc E, Antonson SA, Hardigan PC, et al. The effect of ceramic restoration shade and thickness on the polymerization of light- and dual-cure resin cements. Oper Dent 2011;36(6):661–669. DOI: 10.2341/10-206-L.
Zimmermann M, Egli G, Zaruba M, et al. Influence of material thickness on fractural strength of CAD/CAM fabricated ceramic crowns. Dent Mater J 2017;36(6):778–783. DOI: 10.4012/dmj.2016-296.
Janda R, Roulet JF, Kaminsky M, et al. Color stability of resin matrix restorative materials as a function of the method of light activation. Eur J Oral Sci 2004;112(3):280–285. DOI: 10.1111/j.1600-0722.2004.00125.x.
Goldberg M. In vitro and in vivo studies on the toxicity of dental resin components: a review. Clin Oral Investig 2008;12(1):1–8. DOI: 10.1007/s00784-007-0162-8.
Peixoto RT, Paulinelli VM, Sander HH, et al. Light transmission through porcelain. Dent Mater 2007;23(11):1363–1368. DOI: 10.1016/j.dental.2006.11.025.