[1] TURON-VINAS M, ANGLADA M. Strength and fracture toughness of zirconia dental ceramics[J]. Dental Materials, 34, 365-375(2018).

[2] FERRARI M, VICHI A, ZARONE F. Zirconia abutments and restorations: from laboratory to clinical investigations[J]. Dental Materials, 31, 63-76(2015).

[3] GAUTAM C, JOYNER J, GAUTAM A et al. Zirconia based dental ceramics: structure, mechanical properties, biocompatibility and applications[J]. Dalton Transactions, 45, 19194-19215(2016).

[4] GARVIE R C, HANNINK R H, PASCOE R T. Ceramic steel?[J]. Nature, 258, 703-704(1975).

[5] DENRY I, KELLY J R. State of the art of zirconia for dental applications[J]. Dental Materials, 24, 299-307(2008).

[6] TURON-VINAS M, ANGLADA M. Strength and fracture toughness of zirconia dental ceramics[J]. Dental Materials, 34, 365-375(2018).

[7] DENRY I, HOLLOWAY J. Ceramics for dental applications: a review[J]. Materials, 3, 351-368(2010).

[8] NAKONIECZNY D S, ZIĘBOWICZ A, PASZENDA Z K et al. Trends and perspectives in modification of zirconium oxide for a dental prosthetic applications: a review[J]. Biocybernetics and Biomedical Engineering, 37, 229-245(2017).

[9] LI R W K, CHOW T W, MATINLINNA J P. Ceramic dental biomaterials and CAD/CAM technology: state of the art[J]. Journal of Prosthodontic Research, 58, 208-216(2014).

[10] ZHU DONG-BIN, CHU RUI-QING, ZHANG XIAO-XU et al. Progress in mechanism of ceramics inkjet printing[J]. Journal of Mechanical Engineering, 53, 108-117(2017).

[11] SIVARAMAN K, CHOPRA A, NARAYAN A I et al. Is zirconia a viable alternative to titanium for oral implant? a critical review[J]. Journal of Prosthodontic Research, 62, 121-133(2018).

[12] DURACCIO D, MUSSANO F, FAGA M G. Biomaterials for dental implants: current and future trends[J]. Journal of Materials Science, 50, 4779-4812(2015).

[13] KOBAYASHI K, KUWAJIMA H, MASAKI T. Phase change and mechanical properties of ZrO₂-Y₂O₃ solid electrolyte after ageing[J]. Solid State Ionics, 3-4, 489-493(1981).

[14] KOSMAČ T, KOCJAN A. Ageing of dental zirconia ceramics[J]. Journal of the European Ceramic Society, 32, 2613-2622(2012).

[15] PEREIRA G K R, VENTURINI A B, SILVESTRI T et al. Low-temperature degradation of Y-TZP ceramics: a systematic review and meta-analysis[J]. Journal of the Mechanical Behavior of Biomedical Materials, 55, 151-163(2016).

[16] ÖZCAN M, VOLPATO C Â M, FREDEL M C. Artificial aging of zirconium dioxide: an evaluation of current knowledge and clinical relevance[J]. Current Oral Health Reports, 3, 193-197(2016).

[17] WU Z K, LI N, YAN J Z et al. Effect of hydrothermal aging on the phase mtability, microstructure and mechanical properties of dental 3Y-TZP ceramics[J]. Applied Mechanics and Materials, 529, 251-255(2014).

[18] LUGHI V, SERGO V. Low temperature degradation aging of zirconia: a critical review of the relevant aspects in dentistry[J]. Denal Materials, 26, 807-820(2010).

[19] LANGE F F, DUNLOP G L, DAVIS B I. Degradation during aging of transformationt toughened ZrO₂-Y₂O₃ materials at 250 ℃[J]. Journal of the American Ceramic Society, 69, 237-240(1986).

[20] SATO T, SHIMADA M. Transformation of yttria-doped tetragonal ZrO₂ polycrystals by annealing in water[J]. Journal of the American Ceramic Society, 68, 356-356(1985).

[21] YOSHIMURA M, NOMA T, KAWABATA K et al. Role of H₂O on the degradation process of Y-TZP[J]. Journal of Materials Science Letters, 6, 465-467(1987).

[22] GUO X. Hydrothermal degradation mechanism of tetragonal zirconia[J]. Journal of Materials Science, 36, 3737-3744(2001).

[23] GUO X, SCHOBER T. Water incorporation in tetragonal zirconia[J]. Journal of the American Ceramic Society, 87, 746-748(2004).

[24] LANCE M J, VOGEL E M, REITH L A et al. Low-temperature aging of zirconia ferrules for optical connectors[J]. Journal of the American Ceramic Society, 84, 2731-2733(2001).

[25] HARAGUCHI K, SUGANO N, NISHII T et al. Phase transformation of a zirconia ceramic head after total hip arthroplasty[J]. The Journal of Bone and Joint Surgery British volume, 83, 996-1000(2001).

[26] CHEVALIER J, GREMILLARD L, VIRKAR A V et al. The tetragonal-monoclinic transformation in zirconia: Lessons learned and future trends[J]. Journal of the American Ceramic Society, 92, 1901-1920(2009).

[27] CHEVALIER J, CALES B, DROUIN J M. Low-temperature aging of Y-TZP ceramics[J]. Journal of the American Ceramic Society, 82, 2150-2154(2004).

[28] FABBRI P, PICONI C, BURRESI E et al. Lifetime estimation of a zirconia-alumina composite for biomedical applications[J]. Dental Materials, 30, 138-142(2014).

[29] CHEVALIER J. What future for zirconia as a biomaterial?[J]. Biomaterials, 27, 535-543(2006).

[30] CATTANI-LORENTE M, DURUAL S, AMEZ-DROZ M et al. Hydrothermal degradation of a 3Y-TZP translucent dental ceramic: a comparison of numerical predictions with experimental data after 2 years of aging[J]. Dental Materials, 32, 394-402(2016).

[31] WEI C, GREMILLARD L. Towards the prediction of hydrothermal ageing of 3Y-TZP bioceramics from processing parameters[J]. Acta Materialia, 144, 245-256(2018).

[32] ZHIGACHEV A O, UMRIKHIN A V, RODAEV V V. Theoretical description of zirconia ceramics aging kinetics[J]. Journal of the Australian Ceramic Society, 55, 65-70(2018).

[33] ZHANG F, INOKOSHI M, VANMEENSEL K et al. Lifetime estimation of zirconia ceramics by linear ageing kinetics[J]. Acta Materialia, 92, 290-298(2015).

[34] GARVIE R C, NICHOLSON P S. Phase analysis in zirconia systems[J]. Journal of the American Ceramic Society, 55, 303-305(1972).

[35] TORAYA H, YOSHIMURA M, SOMIYA S. Calibration curve for quantitative analysis of the monoclinic-tetragonal ZrO₂ system by X-ray diffraction[J]. Journal of the American Ceramic Society, 67, 119-121(1984).

[36] KOYAMA T, KUMAMOTO A, MATSUI K et al. Revealing tetragonal-to-monoclinic phase transformation in Y-TZP at an initial stage of low temperature degradation using grazing incident-angle X-ray diffraction measurement[J]. Journal of the Ceramic Society of Japan, 126, 728-731(2018).

[37] GREMILLARD L, GRANDJEAN S, CHEVALIER J. A new method to measure monoclinic depth profile in zirconia-based ceramics from X-ray diffraction data[J]. International Journal of Materials Research, 101, 88-94(2010).

[38] CLARKE D R, ADAR F. Measurement of the crystallographically transformed zone produced by fracture in ceramics containing tetragonal zirconia[J]. Journal of the American Ceramic Society, 65, 284-288(1982).

[39] KATAGIRI G, ISHIDA H, ISHITANI A et al. Direct determination by Raman microprobe of the transformation zone size in Y₂O₃ containing tetragonal ZrO₂ polycrystals[J]. Advances in Ceramics, 24A, 537-544(1986).

[40] LIM C S, FINLAYSON T R, NINIO F et al. In-situ measurement of the stress-induced phase transformations in magnesia-partially-stabilized zirconia using Raman spectroscopy[J]. Journal of the American Ceramic Society, 75, 1570-1573(1992).

[41] KIM B K, HAHN J W, HAN K R. Quantitative phase analysis in tetragonal-rich tetragonal/monoclinic two phase zirconia by Raman spectroscopy[J]. Journal of Materials Science Letters, 16, 669-671(1997).

[42] CASELLAS D, CUMBRERA F L, SáNCHEZ-BAJO F et al. On the transformation toughening of Y-ZrO₂ ceramics with mixed Y-TZP/PSZ microstructures[J]. Journal of the European Ceramic Society, 21, 765-777(2001).

[43] LANGE F F. Transformation toughening[J]. Journal of Materials Science, 17, 225-234(1982).

[44] CHEN S Y, LU H Y. Low-temperature ageing map for 3mol% Y₂O₃-ZrO₂[J]. Journal of Materials Science, 24, 453-456(1989).

[45] HALLMANN L, ULMER P, REUSSER E et al. Effect of dopants and sintering temperature on microstructure and low temperature degradation of dental Y-TZP-zirconia[J]. Journal of the European Ceramic Society, 32, 4091-4104(2012).

[46] PAUL A, VAIDHYANATHAN B, BINNER J G P. Hydrothermal aging behavior of nanocrystalline Y-TZP ceramics[J]. Journal of the American Ceramic Society, 94, 2146-2152(2011).

[47] SWAB J J. Low temperature degradation of Y-TZP materials[J]. Journal of Materials Science, 26, 6706-6714(1991).

[48] LAWSON S, GILL C, DRANSFIELD G P. Hydrothermal and corrosive degradation of Y-TZP ceramics[J]. Key Engineering Materials, 113, 207-214(1995).

[49] DEVILLE S, CHEVALIER J, FANTOZZI G et al. Low temperature ageing of zirconia-toughened alumina ceramics and its implication in biomedical implants[J]. Journal of the European Ceramic Society, 23, 2975-2982(2003).

[50] SMIRNOV A, KURLAND H D, GRABOW J et al. Microstructure, mechanical properties and low temperature degradation resistance of 2Y-TZP ceramic materials derived from nanopowders prepared by laser vaporization[J]. Journal of the European Ceramic Society, 35, 2685-2691(2015).

[51] SUTHARSINI U, THANIHAICHELVAN M, TING C H et al. Effect of two-step sintering on the hydrothermal ageing resistance of tetragonal zirconia polycrystals[J]. Ceramics International, 43, 7594-7599(2017).

[52] PRESENDA A, SALVADOR M D, MORENO R et al. Hydrothermal degradation behavior of Y-TZP ceramics sintered by nonconventional microwave technology[J]. Journal of the American Ceramic Society, 98, 3680-3689(2015).

[53] CHINTAPALLI R, MESTRA A, MARRO F G et al. stability of nanocrystalline spark plasma sintered 3Y-TZP[J]. Materials, 3, 800-814(2010).

[54] WEI C, GREMILLARD L. Surface treatment methods for mitigation of hydrothermal ageing of zirconia[J]. Journal of the European Ceramic Society, 39, 4322-4329(2019).

[55] DEVILLE S, CHEVALIER J, GREMILLARD L. Influence of surface finish and residual stresses on the ageing sensitivity of biomedical grade zirconia[J]. Biomaterials, 27, 2186-2192(2006).

[56] INOKOSHI M, VANMEENSEL K, ZHANG F et al. Aging resistance of surface-treated dental zirconia[J]. Dental Materials, 31, 182-194(2015).

[57] WEI C, GREMILLARD L. The influence of stresses on ageing kinetics of 3Y- and 4Y- stabilized zirconia[J]. Journal of the European Ceramic Society, 38, 753-760(2018).

[58] GILES J C. Préparation par reaction à l’état solide et structure des oxynitrures de zirconium[J]. Bulletin de la Société Chimique de France, 22, 2118-2122(1962).

[59] CHUNG T J, SONG H S, KIM G H et al. Microstructure and phase stability of yttria-doped tetragonal zirconia polycrystals heat treated in nitrogen atmosphere[J]. Journal of the American Ceramic Society, 80, 2607-2612(1997).

[60] VALLE J, MESTRA A, MARRO F G et al. Mechanical properties and resistance to low temperature degradation of surface nitrided 3Y-TZP[J]. Journal of the European Ceramic Society, 33, 3145-3155(2013).

[61] HÜBSCH C, DELLINGER P, MAIER H J et al. Protection of yttria-stabilized zirconia for dental applications by oxidic PVD coating[J]. Acta Biomaterialia, 11, 488-493(2015).

[62] SIVAKUMAR S, TEOW H L, SINGH R et al. The effect of iron oxide on the mechanical and ageing properties of Y-TZP ceramic[J]. Key Engineering Materials, 701, 225-229(2016).

[63] MAURYA R, GUPTA A, OMAR S et al. Effect of sintering on mechanical properties of ceria reinforced yttria stabilized zirconia[J]. Ceramics International, 42, 11393-11403(2016).

[64] KHAN M M, RAMESH S, BANG L T et al. Effect of copper oxide and manganese oxide on properties and low temperature degradation of sintered Y-TZP ceramic[J]. Journal of Materials Engineering and Performance, 23, 4328-4335(2014).

[65] PIVA D H, PIVA R H, ROCHA M C et al. Resistance of InO1.5-stabilized tetragonal zirconia polycrystals to low-temperature degradation[J]. Materials Letters, 163, 226-230(2016).

[66] LEE H B, PRINZF B, CAI W. Atomistic simulations of grain boundary segregation in nanocrystalline yttria stabilized zirconia and gadolinia doped ceria solid oxide electrolytes[J]. Acta Materialia, 61, 3872-3887(2013).

[67] YOKOI T, YOSHIYA M, YASUDA H. On modeling of grain boundary segregation in aliovalent cation doped ZrO₂: critical factors in site-selective point defect occupancy[J]. Scripta Materialia, 102, 91-94(2015).

[68] ZHANG F, BATUK M, HADERMANN J et al. Effect of cation dopant radius on the hydrothermal stability of tetragonal zirconia: grain boundary segregation and oxygen vacancy annihilation[J]. Acta Materialia, 106, 48-58(2016).

[69] ZHANG F, VANMEENSEL K, INOKOSHI M et al. Critical influence of alumina content on the low temperature degradation of (2-3)mol% yttria-stabilized TZP for dental restorations[J]. Journal of the European Ceramic Society, 35, 741-750(2015).

[70] JING Q, BAO J, RUAN F et al. High-fracture toughness and aging-resistance of 3Y-TZP ceramics with a low Al₂O₃ content for dental applications[J]. Ceramics International, 45, 6066-6073(2019).

[71] ZHANG F, VANMEENSEL K, BATUK M et al. Highly-translucent, strong and aging-resistant 3Y-TZP ceramics for dental restoration by grain boundary segregation[J]. Acta Biomaterials, 16, 215-222(2015).

[72] NAKAMURA T, NAKANO Y, USAMI H et al. Translucency and low-temperature degradation of silica-doped zirconia: a pilot study[J]. Dental Materials Journal, 35, 571-577(2016).

[73] GREMILLARD L, EPICIER T, CHEVALIER J et al. Microstructural study of silica-doped zirconia ceramics[J]. Acta Materialia, 48, 4647-4652(2000).

[74] SAMODUROVA A, KOCJAN A, SWAIN M V et al. The combined effect of alumina and silica co-doping on the ageing resistance of 3Y-TZP bioceramics[J]. Acta Biomaterials, 11, 477-487(2015).

[75] MOHAMED E, TAHERI M, MEHRJOO M et al. In vitro biocompatibility and ageing of 3Y-TZP/CNTs composites[J]. Ceramics International, 41, 12773-12781(2015).

[76] MORALES-RODRIGUEZ A, POYATO R, GUTIERREZ-MORA F et al. The role of carbon nanotubes on the stability of tetragonal zirconia polycrystals[J]. Ceramics International, 44, 17716-17723(2018).

[77] SONG YAN-JUN, ZHU DONG-BIN, LIANG JIN-SHENG et al. Enhanced mechanical properties of 3mol% Y₂O₃ stabilized tetragonal ZrO₂, incorporating tourmaline particles[J]. Ceramics International, 44, 15550-15556(2018).

[78] ZHU DONG-BIN, SONG YAN-JUN, LIANG JIN-SHNEG et al. Progress of toughness in dental zirconia ceramics[J]. Journal of Inorganic Materials, 33, 363-372(2018).