Optimisation of apatite bioceramic formation from waste dental mould
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Date
2018-06
Authors
Norainin Sofea Osman
Journal Title
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Abstract
According to Advanced Medical And Dental Institute USM (AMDI), the institute
disposed 50 kg of dental mould waste per month. Dental mould waste have possibility
of calcium source which can form apatite bioceramics materials when react with
phosphoric acid. Bioceramics materials synthesis by dental mould waste produced
mainly Tricalcium Phosphate (TCP) or Hydroxyapatite (HA) that attracted researcher
and scientist attention recently. In this study, it has two projects; synthesis apatite
bioceramics from waste dental mould and heat treatment to waste dental mould for
reuse it as raw material for making dental mould. For project of synthesis apatite
bioceramics material, it used wet chemical precipitation with adopting Chromite Ore
Processing Residue (COPR), following by caustic leaching 7M of Sodium Hydroxide
(NaOH) solution for single and double time. The result of using 7M NaOH double
leaching is able to reduce chromium content from leached residue, which form white
color of apatite bioceramic material when react with Phosphoric acid. Main the phase of
apatite material will form Tricalcium Phosphate (TCP) after sintered in 1100 °C. For 2nd
project, dental mould waste undergone heat treatment with 130 °C in 2 hour and 160 °C
in 4 hour times. The waste dental mould can be reuse as POP.