Microstructure Designing of Porous β-Tricalcium Phosphate for Control of Reactions in the Bone

2007 ◽  
Vol 361-363 ◽  
pp. 989-992 ◽  
Author(s):  
Koji Ioku ◽  
Masanobu Kamitakahara ◽  
Giichiro Kawachi ◽  
Yoshinori Gonda ◽  
Takatoshi Okuda ◽  
...  
Keyword(s):  
Particle Size ◽  
Bone Graft ◽  
Porous Materials ◽  
Pore Size ◽  
Hydrothermal Method ◽  
Tricalcium Phosphate ◽  
Molar Ratio ◽  
Graft Material ◽  
Porous Hydroxyapatite ◽  
Unique Method

Porous materials of β-tricalcium phosphate (β-Ca3(PO4)2; β-TCP) were prepared from porous hydroxyapatite (Ca10(PO4)6(OH)2; HA) with calcium deficient composition of Ca/P molar ratio of 1.50 synthesized by hydrothermal method. The porous β-TCP was composed of rod-shaped particles of about 10-20 μm in length. Rod-shaped particles were locked together to make micro-pores, and the size of micro-pores formed by tangling of rod-shaped particles was about 0.1-0.5 μm. The particle size and micro-pore size could be controlled by our unique method. It must be suitable for the bone graft material and as the scaffold of cultured bone.

Porous Granules of β-Tricalcium Phosphate Composed of Rod-Shaped Particles

2006 ◽  
Vol 309-311 ◽  
pp. 1059-1062 ◽  
Author(s):  
Koji Ioku ◽  
Giichiro Kawachi ◽  
Kazuhiko Nakahara ◽  
Emile Hideki Ishida ◽  
Hideyuki Minagi ◽  
...  
Keyword(s):  
Particle Size ◽  
Bone Graft ◽  
Pore Size ◽  
Hydrothermal Method ◽  
Tricalcium Phosphate ◽  
Granule Size ◽  
Graft Material ◽  
Porous Hydroxyapatite ◽  
Size Particle ◽  
Unique Method

Porous granules of β-tricalcium phosphate (β-Ca3(PO4)2; β-TCP) were prepared from porous hydroxyapatite granules with calcium deficient composition synthesized by hydrothermal method. The β-TCP granules were composed of rod-shaped particles of about 10-20 µm in length. Rod-shaped particles were locked together to make micro-pores, and the size of micro-pores formed by tangling of rod-shaped particles was about 0.1-0.5 µm. The granule size, particle size, and micro-pore size could be controlled by our unique method. The porous granules of β-TCP must be suitable for the bone graft material and for scaffold of cultured bone.

Calcium Phosphate Porous Materials with Unique Microstructures

2008 ◽  
Vol 396-398 ◽  
pp. 645-648 ◽  
Author(s):  
Koji Ioku ◽  
Masanobu Kamitakahara ◽  
Noriaki Watanabe ◽  
Osamu Kawaguchi ◽  
Setsuaki Murakami ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Aspect Ratio ◽  
Bone Graft ◽  
Porous Materials ◽  
Hydrothermal Method ◽  
Tricalcium Phosphate

Three types of calcium phosphate porous materials were prepared by the applied hydrothermal method. One of them was non-stoichiometric hydroxyapatite (HA) with calcium deficient composition and the others were β-tricalcium phosphate (β-TCP) and HA/β-TCP bi-phase material. Granules with several millimeter in size of calcium deficient HA, β-TCP and HA/β-TCP could be prepared. These granules with porosity over 70 % were composed of rod-shaped particles with aspect ratio about 10. Rod-shaped particles were locked together to make sub-micro-sized pores of about 0.1 to 0.5 µm in size. These materials must be suitable for the bone graft materials and as the scaffolds of cultured bone.

Fabrication of Porous SiAlON Using Fe2O3 as Pore Former

2014 ◽  
Vol 804 ◽  
pp. 267-270
Author(s):  
Qing Wen Duan ◽  
Rong Zhen Liu ◽  
Hai Yun Jin ◽  
Jian Feng Yang ◽  
Zhi Hao Jin
Keyword(s):  
Particle Size ◽  
Porous Materials ◽  
Pore Size ◽  
Fracture Mode ◽  
Size Effects ◽  
Pore Diameter ◽  
Bending Strength ◽  
Thermal Reduction ◽  
Pore Former ◽  
Median Pore

Porous SiAlON ceramics were fabricated by carbo-thermal reduction nitridation method using Fe2O3 as pore former. Particle size effects of Fe2O3 were reported in this paper. The results showed that composites were composed by SiAlON, AlN and Iron Silicon phases. The median pore diameter of Sialon was affected by the composition and particle size of Fe2O3. The fracture mode of this material was intergranular. With the increase of Fe2O3 additions, the porosity of this materials increased. The bending strength of this material was reversely proportional to Fe2O3 particle size. The maximum bending strength of Porous materials with 30wt.% Fe2O3 additions (with a porosity about 65% and the pore size is about 1μm) could reach 22 MPa. The porous Sialon ceramics with a smaller pore size exhibited a higher bending strength.

scholarly journals Influence of Material Properties on Rate of Resorption of Two Bone Graft Materials after Sinus Lift Using Radiographic Assessment

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Fawzi Riachi ◽  
Nada Naaman ◽  
Carine Tabarani ◽  
Nayer Aboelsaad ◽  
Moustafa N. Aboushelib ◽  
...  
Keyword(s):  
Particle Size ◽  
Physical Properties ◽  
Bone Graft ◽  
Calcium Release ◽  
Average Particle Size ◽  
Healing Time ◽  
Average Particle ◽  
Graft Material ◽  
Radiographic Assessment ◽  
Sinus Augmentation

Purpose. The aim of this study was to investigate the influence of chemical and physical properties of two graft materials on the rate of resorption.Materials and Methods. Direct sinus graft procedure was performed on 22 patients intended for implant placement. Two types of graft materials were used (Bio-Oss and Cerabone) and after 8 months healing time the implants were inserted. Radiographic assessment was performed over the period of four years. Particle size, rate of calcium release, and size and type of crystal structure of each graft were evaluated.Results.The average particle size of Bio-Oss (1 mm) was much smaller compared to Cerabone (2.7 mm). The amount of calcium release due to dissolution of material in water was much higher for Bio-oss compared to Cerabone. X-ray image analysis revealed that Bio-Oss demonstrated significantly higher volumetric loss (33.4 ± 3.1%) of initial graft size compared to Cerabone (23.4 ± 3.6%). The greatest amount of vertical loss of graft material volume was observed after one year of surgery.Conclusion. The chemical and physical properties of bone graft material significantly influence resorption rate of bone graft materials used for sinus augmentation.

scholarly journals Platelet Rich Fibrin and Bone Graft in the Treatment of Intrabony Defect in Periodontitis Patients

2018 ◽  
Vol 2 (2) ◽  
pp. 49-55
Author(s):  
Shilu Shrestha ◽  
Surendra Man Shrestha ◽  
Ameena Pradhan ◽  
Shreeya Aryal
Keyword(s):  
Bone Graft ◽  
Graft Material ◽  
Intrabony Defects ◽  
Pocket Depth ◽  
Porous Hydroxyapatite ◽  
Platelet Rich Fibrin ◽  
Polypeptide Growth Factors ◽  
Radiographic Outcomes ◽  
Probing Depth ◽  
Depth Reduction

Background: Porous hydroxyapatite and β-tricalcium phosphate (β-TCP + HA) bone grafting material has resulted in clinically acceptable responses when used to fill the periodontal intrabony defects. PRF is an autologous leukocyte and platelet preparation that concentrates various polypeptide growth factors which therefore holds potential to be used as regenerative treatment for periodontal defects. Aim: The purpose of this study was to evaluate clinical and radiographic outcomes in periodontal intrabony defects treated with platelet rich fibrin compared to alloplastic bone graft material. Materials and Methods: Twenty subjects (10 subject per group, one site/subject) were treated either with platelet rich fibrin or alloplastic bone graft (30% β-TCP+ 70% HA). Primary clinical parameters: PD, CAL were taken at baseline, three months, six months and nine months post-operatively. Standardised radiographic data were collected at baseline, six months and nine months postoperatively. Results: Preoperative parameters were similar for both groups. Postsurgical measurements revealed a greater reduction in pocket depth in bone graft group (2.5 mm), greater CAL gain (2.2 mm) and greater defect fill (1.30 mm) as compared to platelet rich fibrin group (1.50 mm, 1.6 mm and 0.80 mm respectively ) at nine months. Conclusion: Treatment of intrabony defects with alloplast (30% β TCP+ 70% HA) or platelet rich fibrin both resulted in a significant probing depth reduction, CAL gain and bone depth reduction, with significantly better improvement in bone graft group.

scholarly journals Clinical and radiographic evaluations of porous hydroxyapatite as bone graft material in the treatment of interproximal vertical defects

2015 ◽  
Vol 4 (4) ◽  
pp. 229
Author(s):  
DanduSubramanyam Madhu Babu ◽  
KankaraVinathi Reddy ◽  
Anumala Deepa ◽  
Shobha Patil ◽  
Vandana ◽  
...  
Keyword(s):  
Bone Graft ◽  
Graft Material ◽  
Porous Hydroxyapatite ◽  
Bone Graft Material

scholarly journals Synthesise β-tricalcium phosphate (β-TCP) ceramic powder by 2 reaction steps: hydrothermaland calcination reaction toward bone tissue regeneration

2021 ◽  
Vol 63 (1) ◽  
pp. 39-41
Author(s):  
Huynh Quoc Huy Nguyen ◽  
◽  
Dai Phu Huynh ◽  
Van Thang Le ◽  
Dai Phong Lam ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Bone Tissue ◽  
Tissue Regeneration ◽  
Tricalcium Phosphate ◽  
Ceramic Powder ◽  
Treatment Temperature ◽  
Bone Tissue Regeneration ◽  
Molar Ratio ◽  
Heat Treated

This research presents the effect of heat treatment temperature on the forming ability of β-tricalcium phosphate (β-TCP) bioceramic materials toward the bone tissue regeneration application. Ca(OH)2 and H3PO4 were mixed with a Ca/P molar ratio of 1.5, followed by hydrothermal treatment at 180oC for 24 hours to obtain the calcium phosphate hydrate (CPH) with phase composition similar to hydroxyapatite (HA). The CPH mineral was heat-treated at 700 and 1000oC for 3 hours to evaluate the ability to obtain β-TCP. The result showed that β-TCP can be obtained by the CPH calcined at 1000oC for 3 hours, with the particle size of 1~2 μm, suitable for bone tissue regeneration application.

Chemical preparation of beta calcium sulfate hemihydrate granules with a special particle size as bone graft material

2011 ◽  
Vol 44 (13) ◽  
pp. S173
Author(s):  
Naser Sargolzaie ◽  
Amir Moeen Taghavi ◽  
Nasrollah Saghravanian ◽  
Ali Ahmadpour ◽  
Javad Sargolzaei ◽  
...  
Keyword(s):  
Particle Size ◽  
Bone Graft ◽  
Calcium Sulfate ◽  
Graft Material ◽  
Chemical Preparation ◽  
Bone Graft Material ◽  
Calcium Sulfate Hemihydrate
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