Bone Defect and fracture repair
Ceramic-based bone graft substitutes
Among different ceramic based graft substitute materials, calcium phosphate based ceramics such as hydroxyapatite (HA), ?-tricalcium phosphate (?-TCP) and bioactive glass are used quite substantially for long time.
Calcium phosphate ceramics introduced more than three decades ago are considered as bioactive bone substitutes. The paste or injectable calcium phosphates cement offers the advantage of being freely mouldable and adaptable to bone defects.
Calcium hydroxyapatite (HA)
The most unique property of HA material is chemical similarity with the mineralized phase of bone; this similarity accounts for their osteoconductive potential and excellent biocompatibility. Hydroxyapatite (HA) as a synthetic material, usually used as coating for dental and orthopedic implants, but there is limited in use due to its moderate to low solubility within the body and mechanical properties that differ from surrounding tissue and bone. Doped HA with manganese and/or zinc as bone substitute have been tried and resulted in faster resorption
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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