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The effect of pore forming agent particle size on the porosity, microstructure and in vitro studies of hydroxyapatite ceramics.
 Unlike ionomeric cements, Plastipore, glass ceramics, and hydroxyapatite ceramics must be individually trimmed to size and forced into position between the floor and the roof of the ear canal.
Recent trends discussed with in the medical ceramics research report include the shift towards piezoelectric devices; the planned doubling of capacity at Sunrock Ceramics, and discussion of the use of novel hydroxyapatite ceramics to treat complex fractures, amongst others.
Sivakumar, Dense hydroxyapatite ceramics through gel casting technique, Materials Letters 29 (1996) 57-61 (12.
But the fracture toughness of the hydroxyapatite ceramics does not exceed the value of about 1 Mpa.
Examination of the injection site in mice and albino rabbit did not show any tissue reaction such as erythema, edema or necrosis of the bone, which indicated that the material was histological studies after bone grafting experiments in Mongrel dog and in human patients revealed the efficacy of the hydroxyapatite ceramics for filling traumatic or pathological bone defects or bone fracture as it always formed a bond between this material and the host bone within 6 weeks and the wound healing was complete within 14 weeks after the operation.