| Penulis/Author |
Ir. Muhammad Kusumawan Herliansyah, S.T., M.T.,Ph.D., IPU., ASEAN Eng. (1) ; Ir. M. Waziz Wildan, M.Sc., Ph.D., IPU (2); Dr. Suyitno, S.T., M.Sc. (3); Dr.dr. Puntodewo,Sp.OT, Ph.D, FICS,M.Kes (4) |
| Abstrak/Abstract |
Restoration process for damaged human tissue may be performed using autograft, allograft or xenograft methods. Hydroxyapatite (HA) is a biomaterial that can be used as bone graft materials, because of its similar properties to human bone and teeth. This research aims to develop bone graft made of bovine bone hydroxyapatite doped with alumina. Several bovine bone femurs of the adult bovines were collected from a local abattoir. Bovine bone was cleaned and cut into small pieces with a dimension of 10 mm x 10 mm x 5 mm. The bone pieces were calcined at 900oC for 2 hours in air atmosphere. It was then grounded using mortar and pestle continued with ball-milled to produce bovine HA (BHA) powder. To produce alumina (A12O3) doped BHA, BHA powder was mixed with various weight percentage of alumina (0, 1, 2, 3, 4, and 5%). Each composition was uniaxially pressed with a pressure of 70 MPa to produce green body samples in the form of cylinder with 15 mm diameter and rectangular prism (50 mm x 5 mm x 5 mm) for bending test. All specimens were pressureless sintered at 1300"C 1br 2 hours in air atmosphere. The XRD analysis shows that the sintered specimens contain hydroxyapatite and no signs of decomposition regardless of alumina doping. The Vickers hardness slightly decreases (from 350 kg/mm2 to 298 kg/mm2) with increasing alumina content from 0% to 5%. The bending strength also slightly decreases (from 22 MPa to 15 MPa) with increasing alumina content from 0% to 5%. |
