title: Hydroxyapatite particle characteristics influence the enhancement of the mechanical and chemical properties of conventional restorative glass ionomer cement.
abstract: The aims of this study were to improve the mechanical and chemical properties of conventional restorative glass ionomer cement (GIC) by adding hydroxyapatite (HAp) preparations with different characteristics, and to investigate the underlying reaction mechanisms. Fuji IX GP® was used as the control GIC. The experimental GICs consisted of four HAp-particles with different characteristics added at 8 mass% to Fuji IX-powder. All cements were prepared by mixing with Fuji IX-liquid (P/L=3.6). Four HAp-particles were analyzed, and then the mechanical strengths and the fluoride-ion- release-recharge-behaviors of five GIC groups were evaluated. The results of this study demonstrate that the addition of HAp particles with highly reactive properties such as high specific surface area can enhance the flexural strength and fluoride ion release properties of conventional restorative GIC. Our results further indicate that HAp functions as an adsorbent and an ion exchangeable agent, resulting in improved mechanical and chemical properties of GIC.
authors.affiliation: Department of Pediatric Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan. kenji@dent.tokushima-u.ac.jp
authors.forename: Kenji
authors.initials: K
authors.lastname: Arita
authors.forename: Aimi
authors.initials: A
authors.lastname: Yamamoto
authors.forename: Yukari
authors.initials: Y
authors.lastname: Shinonaga
authors.forename: Keiko
authors.initials: K
authors.lastname: Harada
authors.forename: Yoko
authors.initials: Y
authors.lastname: Abe
authors.forename: Keizo
authors.initials: K
authors.lastname: Nakagawa
authors.forename: Shigeru
authors.initials: S
authors.lastname: Sugiyama
mesh_terms: D000327:Adsorption; D017607:Aluminum Compounds / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry; D002327:Cariostatic Agents / Q000737:chemistry; D055598:Chemical Phenomena; D019245:Compressive Strength; D003764:Dental Materials / Q000737:chemistry*; D004058:Diffusion; D017886:Durapatite / Q000737:chemistry*; D055119:Elastic Modulus; D005459:Fluorides / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D007474:Ion Exchange; D008422:Materials Testing; D055595:Mechanical Phenomena; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry; D010316:Particle Size; D018583:Pliability; D013052:Spectrometry, X-Ray Emission; D013314:Stress, Mechanical; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D017607:Aluminum Compounds; D000538:Aluminum Silicates; D002327:Cariostatic Agents; D003764:Dental Materials; D005899:Glass Ionomer Cements; C110713:fuji IX; D017886:Durapatite; D005459:Fluorides; C032311:aluminum fluoride