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Tooth bleaching has been routinely used since the late 1870s [1] and several materials and techniques have been presented for this purpose [2].
The bleaching materials currently used have as the active ingredient either hydrogen peroxide (HP) or its precursor carbamide peroxide (CP), in various concentration.
Materials and methods Tooth selection.
References [1] Fasanaro TS: submitted to Journal of Esthetic Dentistry (1992) [2] Joiner A:submitted to Journal of Dentistry （2007） [3] Zantner C, Derdilopoulou F and Martus P: submitted to Operative Dentistry (2006) [4] Ziebolz D, Helms K and Hannig C: submitted to Clinical Oral Investigation (2007) [5] Benamar A, Liberman R and Gorfil C: submitted to American Journal of Dentistry (1995) [6] Attin T, Manolakis A and Buchalia W: submittied to Journal of Oral Rehabilitation (2003) [7] Berger SB, Coelho AS and Oliveira VAP: submitted to Journal of Applied Oral Science (2008) [8] Hegedüs C, Bistey T and Flóra-Nagy E: submitted to Journal of Dentistry (1999) [9] Bertrand MF, Leforestier E and Muller M: submitted to Journal of Biomedical Materials Research (2000) [10] de Freitas PM, Turssi Cp and Hara AT: submitted to American Journal of Dentistry ( 2004) [11] Efeoglu N, Wood D and Efeoglu C: submitted to Journal of Dentistry (2005) [12] Zantner C, Beheim-Schwarzbach N and Neumann
K: submitted to Dental Materials (2007) [13] de Freitas PM, Turssi CP and Hara AT: submitted to Quintessence International (2004) [14] Attin T, Betke H and Schippan F: submitted to Journal of Dentistry (2007) [15] Gladwell J, Simmons D and Wright JT: submitted to Journal of Esthetic and Restorative Dentistry (2006) [16] Tanizawa Y: submitted to International Journal of Cosmetic Science (2005) [17] Lewinstein I, Fuhrer N and Churaru N:submitted to Journal of Prosthetic Dentistry ( 2004) [18] Chen HP, Chang CH, and Liu JK: submitted to Journal of Dentistry (2008) [19] Perez CR, Hirata RJ and da Silva AH: submitted to Operative Dentistry (2009) [20] Cilli R, de Mattos MCR and Honorio HM: submitted to Journal of Dentistry (2009)

Zhong: Materials Science and Engineering B 178 (2013), p. 990
[14] J.A. de Castro, M.F. de Campos: Materials Science Forum Vols. 591-593 (2008), p. 80
[16] M.F. de Campos, J.A. de Castro: Materials Science Forum Vols. 660-661 (2010), p. 279
[17] M.F. de Campos, J.A. de Castro: Materials Science Forum Vols. 727-728 (2012), p. 151
[18] M.F. de Campos, F.A.S. da Silva, E.A Perigo, J.A. de Castro: Journal of Magnetism and Magnetic Materials Vol. 345 (2013), p. 147.

The material X80 grade pipeline steel, where is E = 245 Gpa, σs = 569.5 Mpa.
NJZY14006) , the Natural Science Foundation of Hebei Provincial Education Department, China (Grant No.
Journal of Materials Processing Technology, 2001, 108: 369-375 [2] Thomson P F, Kim J K.
Journal of Materials Processing Technology, 2002, 120(1-3): 348-354 [4] R.Hill.
Springback after the biaxial elastic-plastic pure bending of a rectangular plate—Ⅰ[J].International journal of mechanical sciences,1981, 23: 619-630 [6] T.X.Yu, W.

Hot compression performance of TiC10/Cu-Al2O3 composite prepared by vacuum hot-pressed sintering Zhiqiang Yang1,a, Yong Liu1,2,b, Baohong Tian 1,2, Yi Zhang1,2 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, henan China 2 Henan Key Laboratory of Advanced Non-Ferrous Materials, Luoyang 471023, China ayzq871024@163.com, bliuyong@haust.edu.cn Keywords: vacuum-pressed sintering; TiC10/Cu-Al2O3 composite; microstructure; flow stress Abstract.
Fu, Journal of Materials Processing Technology, Vol. 113 (2001), p. 63 [2] Tiejun Wang , Sigui Qin, Wuping.Zhou, et al.
Ordnance Material Science and Engineering Vol. 29(2006), p. 37 (In Chinese) [3] S.
Materials Science and Engineering A, Vol. 502 (2009), p. 91 [4] Qingguo Xiao, Feng Duan, Qunhu Xue, et al.
Materials Science and Engineerin A,Vol. 502 (2009), p. 91

F. and Tanasoiu, V.: Journal of Materials Science Vol. 39 (2004), p.5431-5434
A.: Materials Science and Engineering A Vol. 345 (2003), p. 243-248
[13] Boonruang, A., Ngernchuklin, P. and Eamchotchawalit, C.: Journal of Metals, Materials and Minerals Vol. 22 (2012), p. 55-59
K.: Materials Letters Vol. 42 (2000), p. 232–239
C.: Materials Science and Engineering B Vol. 111 (2004), p. 124–130 [16] El-Salam, F.

Study of the reaction parameters by isothermal conduction calorimetry", Journal of Materials Science, 35, 6309-6315
Journal of Materials Science, 42, 3117–3123
ACI Materials Journal, 101, 467–472
[25] Davidovits, J. (1991), "Geopolymers:Inorganic Polymeric New Materials", Journal of Thermal Analysis, 37, 1633-1656
T. (2002), "Investigation of a synthetic aluminosilicate inorganic polymer", Journal of Materials Science, 37, 2311-2316.

Experimental process 2.1 Materials The ceramic powders is 3Y-ZrO2 (Guangdong Orient Zirconic Industry Science and technology Co., Ltd.) with an average size of 1 um (D50).
From Fig.2, it is easy to know the phases of materials (A-F) are all tetragonal phase.
The different materials molding can’t change the phase structure of 3Y-ZrO2.
International Materials Reviews, 2005, 50(4):239-256
Materials Science & Technology, 2006, 14(2):165-170

Ritchie: Materials Science and Engineering A, Vol.1-2(2003),p. 216
Elsayed-Ali: Materials Science and Engineering: A, Vol.1-2(1999),p. 260
Altenberger: Materials Science and Engineering: A, Vol.1-2(2007),p. 176
Lu: Materials Science and Engineering: A, Vol.(2007),p. 281
Guangyi: Rare Metal Materials and Engineering, Vol.2(2009),p. 339

MATERIALS AND METHODS All the HAp containing calcium phosphate powder samples were prepared by calcination following a similar routine throughout this work.
Journal of Materials Science: Materials in Medicine, 4, 150- 158, (1993)
Journal of Materials Science In Medicine, 3, 299-305, (1992)
"Biodegradation of four calcium phosphate ceramic; in vivo rates and tissue interactions", Journal of Materials Science: Materials in Medicine, 2, 63-70, (1991)
Z.Le Geros, "Calcium Phosphates in Oral Biology and Medicine" Monographs in Oral Science, vol. 15, Ed.

Materials Today: Proceedings, 11, pp.1001-1009
Irish Interdisciplinary Journal of Science & Research (IIJSR) Vol, 6, 36-42
International Journal of Modern trends in Engineering and science, 2018
Materials Today: Proceedings 37 (2021): 3466-3470 [36] Thirumalai, R., M.
Materials Today: Proceedings 45 (2021): 467-472