Bonding strength of bonelike apatite layer to Ti metal substrate

Abstract

Our previous study showed that titanium metal forms a bonelike apatite layer on its surface in simulated body fluid when it was subjected to NaOH and heat treatments to form a sodium titanate hydrogel or amorphous sodium titanate surface layer. In the present study, bonding strength of the apatite layer formed on the titanium metals to the substrates were examined under tensile stress, in comparison with those of the apatite layers formed on Bioglass 45S5-type glass, dense sintered hydroxyapatite, and glass-ceramic A-W, which are already clinically used. The NaOH-treated titanium metals showed higher bonding strength of the apatite layer to the substrates, which was maximized by heat treatments at 500 and 600 degrees C, than all the examined bioactive ceramics. It is believed that bioactive metals thus obtained are useful as bone substitutes, even under load-bearing conditions.

Calcium Hydroxyapatite Thin Films on Titanium Substrates Prepared by Ultrasonic Spray Pyrolysis

“…[1][2][3][4][5] Hydroxyapatite-coated dental implants are usually recommended for the usage in maxilla areas, where bones are less dense. [1][2][3][4][5][6][7][8][9] Such composites are widely used, because they have a capability to integrate directly into bone tissues through the processes of resorption and/or the processes of formation of a new bone on the surface of implant covered by calcium hydroxyapatite.…”

“…[1][2][3][4][5] Hydroxyapatite-coated dental implants are usually recommended for the usage in maxilla areas, where bones are less dense. [1][2][3][4][5][6][7][8][9] Such composites are widely used, because they have a capability to integrate directly into bone tissues through the processes of resorption and/or the processes of formation of a new bone on the surface of implant covered by calcium hydroxyapatite. [10][11][12][14][15][16] A variety of methods [17][18][19][20][21][22][23][24][25][26][27] can be used for the synthesis of calcium hydroxyapatite films, such as electrophoretic deposition, 17) electrocrystallization, 18) plasma spray deposition, 19,20) flame spray deposition, 19) magnetic field spattering, 21) deposition by aging in fluids like SBF fluids, 14) ion beam spattering, 22,23) laser beam spattering, 24) electron beam evaporation, 25) sol-gel, 26) aerosol-gel 27) and hydrothermal synthesis.…”

Surface Characterization on Alkali-Heat-Treatment on Titanium Alloy

“…Surface modification of alkali-heat treatment was conducted using established method from Krupa et al [11], Kim et al [14] and Qu & Wei [15] with some modification. The alkali treatment is a process of surface etching and was performed by soaking both as-Ti and ab-Ti disc in 50 ml of 200g/L NaOH and 50 ml of 280.53g/L KOH aqueous solution for 24 hours at 60 °C for each group.…”

UV photofunctionalization promotes nano-biomimetic apatite deposition on titanium

“…1,2 Various biomaterials have been immersed in simulated body fluid (SBF) to form biomimetic apatite of similar chemical composition and molecular structure to bone on the material surface. [2][3][4] Significant progress has been made in depositing biomimetic apatite on titanium-based materials; 1,[4][5][6][7] however, the speed, efficiency, and quality of biomimetic apatite formation tend to be insufficient for commercial implant purposes. To date, titanium materials have been pretreated with water, acidic and alkaline chemicals, thermal and electrochemical oxidation, or their combination to improve apatite deposition.…”