Tooth discolouration and the existence of metallic substrates increase the difficulty of restoration to reproduce natural and aesthetic appearance. The commonly used veneered zirconia restorations have a high risk of porcelain chipping, and the monolithic zirconia restorations cannot always achieve satisfying aesthetics. The newly developed self-glazed monolithic zirconia restorations digitally manufactured by additive technique have colour- and translucency-gradient characteristics. They could mask the different coloured substrates and achieve a natural look simultaneously. This clinical report describes the prosthodontic treatments of two patients with different coloured substrates in the anterior region. Both functional and aesthetic outcomes are satisfactory after 1–3 years of follow-up.
ChoYE, LimYJ, HanJS, Effect of Yttria content on the translucency and masking ability of Yttria-stabilized tetragonal zirconia polycrystal. Materials. 2020;13(21):4726. DOI:10.3390/ma13214726.
2.
ChangJ, SilvaJD, SakaiM, The optical effect of composite luting cement on all ceramic crowns. J Dent. 2009;37(12):937–943. DOI:10.1016/j.jdent.2009.07.009.
3.
TabatabaianF, TaghizadeF, NamdariM.Effect of coping thickness and background type on the masking ability of a zirconia ceramic. J Prosthet Dent. 2018;119(1):159–165. DOI:10.1016/j.prosdent.2017.03.009.
4.
BassoGR, KodamaAB, PimentelAH, Masking colored substrates using monolithic and bilayer CAD-CAM ceramic structures. Oper Dent. 2017;42(4):387–395. DOI:10.2341/16-247-L.
5.
UedaK, GüthJF, ErdeltK, Light transmittance by a multi-coloured zirconia material. Dent Mater J. 2015;34(3):310–314. DOI:10.4012/dmj.2014-238.
6.
MarchackBW, SatoS, MarchackCB, Complete and partial contour zirconia designs for crowns and fixed dental prostheses: a clinical report. J Prosthet Dent. 2011;106(3):145–152. DOI:10.1016/S0022-3913(11)60112-1.
7.
KontonasakiE, RigosAE, IliaC, Monolithic zirconia: An update to current knowledge. optical properties, wear, and clinical performance. Dent J. 2019;7(3):90. DOI:10.3390/dj7030090.
LiuY, WangY, WangD, Self-glazed zirconia reducing the wear to tooth enamel. J Eur Ceram Soc. 2016;36(12):2889–2894. DOI:10.1016/j.jeurceramsoc.2015.11.029.
10.
ZhangY, HanJ-M, ZhengG, Fatigue behaviours of the zirconia dental restorations prepared by two manufacturing methods. Adv Appl Ceram. 2017;116(7):368–375. DOI:10.1080/17436753.2017.1336365.
11.
JirajariyavejB, WanapiromP, AnunmanaC.Influence of implant abutment material and ceramic thickness on optical properties. J Prosthet Dent. 2018;119(5):819–825. DOI:10.1016/j.prosdent.2017.05.015.
12.
VerriFR, OkumuraMH, LemosCA, Three-dimensional finite element analysis of glass fiber and cast metal posts with different alloys for reconstruction of teeth without ferrule. J Med Eng Technol. 2017;41(8):644–651. DOI:10.1080/03091902.2017.1385655.
13.
FokkingaWA, KreulenCM, BronkhorstEM, Up to 17-year controlled clinical study on post and-cores and covering crowns. J Dent. 2007;35(10):778–786. DOI:10.1016/j.jdent.2007.07.006.
14.
GoodacreCJ, CampagniWV, AquilinoSA.Tooth preparations for complete crowns: an art form based on scientific principles. J Prosthet Dent. 2001;85(4):363–376. DOI:10.1067/mpr.2001.114685.
15.
TidehagP, ShenZJ.Digital dentistry calls the change of ceramics and ceramic processes. Adv Appl Ceram. 2019;118(1-2):83–90. DOI:10.1080/17436753.2018.1511337.
16.
ShenZ, LiuL, XuX, Fractography of self-glazed zirconia with improved reliability. J Eur Ceram Soc. 2017;37(14):4339–4345. DOI:10.1016/j.jeurceramsoc.2017.03.008.
17.
CuiX, ShenZ, WangX.Esthetic appearances of anatomic contour zirconia crowns made by additive wet deposition and subtractive dry milling: a self-controlled clinical trial. J Prosthet Dent. 2020;123(3):442–448. DOI:10.1016/j.prosdent.2019.02.016.
18.
WuZ, ShiA, LiangQ, Aesthetic restoration of anterior teeth with monolithic self-glazed zirconia crowns via a completely digital workflow: a clinical case report. Adv Appl Ceram. 2020;119(5-6):291–296. DOI:10.1080/17436753.2019.1690847.
19.
BegumZ, ChhedaP, ShruthiCS, Effect of ceramic thickness and Luting agent shade on the color masking ability of laminate veneers. J Indian Prosthodont Soc. 2014;14(Suppl 1):46–50. DOI:10.1007/s13191-014-0362-2.
20.
NiuE, AgustinM, DouglasRD.Color match of machinable lithium disilicate ceramics: effects of cement color and thickness. J Prosthet Dent. 2014;111(1):42–50. DOI:10.1016/j.prosdent.2013.09.005.
21.
TabatabaianF, MotamediE, SahabiM, Effect of thickness of monolithic zirconia ceramic on final color. J Prosthet Dent. 2018;120(2):257–262. DOI:10.1016/j.prosdent.2017.10.007.
22.
HerpelC, RammelsbergP, RuesS, Color stability of individually stained monolithic zirconia following occlusal adjustment. J Esthet Restor Dent. 2021;33(2):387–393. DOI:10.1111/jerd.12620.
23.
LiR, ChenH, WangY, Three-dimensional trueness and margin quality of monolithic zirconia restorations fabricated by additive 3D gel deposition. J Prosthodont Res. 2020;64(4):478–484. DOI:10.1016/j.jpor.2020.01.002.
24.
KurtM, BalBT.Effects of accelerated artificial aging on the translucency and color stability of monolithic ceramics with different surface treatments. J Prosthet Dent. 2019;121(4):712.e1–712.e8. DOI:10.1016/j.prosdent.2019.01.014.
