Dissolution behaviour of calcium phosphate coatings obtained by laser ablation

被引:73
作者
Clèries, L [1 ]
Fernández-Pradas, JM [1 ]
Sardin, G [1 ]
Morenza, JL [1 ]
机构
[1] Univ Barcelona, Dept Fis Aplicada Opt, E-08028 Barcelona, Spain
关键词
pulsed laser deposition; coatings; calcium phosphate; hydroxyapatite; dissolution;
D O I
10.1016/S0142-9612(98)00063-5
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Pulsed laser deposited calcium phosphate coatings on titanium alloy have been tested under simulated physiological conditions in order to evaluate the changes in morphology, composition and structure. The coatings were deposited under different conditions to obtain different crystalline structures, ranging from amorphous and mixed crystalline phases to pure crystalline hydroxyapatite (HA). The coated samples were immersed in a Ca-free Hank's balanced salt solution for up to 5 days. Characterization of the coatings was performed by X-ray diffraction, scanning electron microscopy and Fourier-transform Raman spectroscopy before and after immersion. Their dissolution behaviour was also monitored through their mass loss and calcium release. Coatings of pure HA preserve their morphology and structure during the exposure time in solution. In multiphasic coatings, consisting of HA with tetracalcium phosphate (TetraCP) or beta-tricalcium phosphate (beta-TCP) with a-tricalcium phosphate (alpha-TCP), microporosity is induced by the complete dissolution of TetraCP or alpha-TCP. Amorphous calcium phosphate coatings totally dissolve. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1483 / 1487
页数:5
相关论文
共 16 条
  • [11] DEGRADATION POTENTIAL OF PLASMA-SPRAYED HYDROXYAPATITE-COATED TITANIUM IMPLANTS
    PASCHALIS, EP
    ZHAO, Q
    TUCKER, BE
    MUKHOPADHAYAY, S
    BEARCROFT, JA
    BEALS, NB
    SPECTOR, M
    NANCOLLAS, GH
    [J]. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH, 1995, 29 (12): : 1499 - 1505
  • [12] PLASMA SPRAYING INDUCED CHANGES OF CALCIUM-PHOSPHATE CERAMIC CHARACTERISTICS AND THE EFFECT ON INVITRO STABILITY
    RADIN, SR
    DUCHEYNE, P
    [J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE, 1992, 3 (01) : 33 - 42
  • [13] SARDIN G, 1994, HYDROXYAPATITE RELAT, P163
  • [14] Pre-conditioning and dual constant composition dissolution kinetics of pulsed laser deposited hydroxyapatite thin films on silicon substrates
    Tucker, BE
    Cottell, CM
    Auyeung, RCY
    Spector, M
    Nancollas, GH
    [J]. BIOMATERIALS, 1996, 17 (06) : 631 - 637
  • [15] RAMAN MICROPROBE INVESTIGATION OF THE CALCIUM-PHOSPHATE PHASES OF 3 COMMERCIALLY AVAILABLE PLASMA-FLAME-SPRAYED HYDROXYAPATITE-COATED DENTAL IMPLANTS
    WEINLAENDER, M
    REUMER, J
    KENNEY, EB
    MOY, PK
    ADAR, F
    [J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE, 1992, 3 (06) : 397 - 401
  • [16] The effect of dissolution on plasma sprayed hydroxylapatite coatings on titanium
    Whitehead, R.Y.
    Lucas, L.C.
    Lacefield, W.R.
    [J]. Clinical Materials, 1993, 12 (01): : 31 - 39