Various methods were used to prepare HA indifferent forms
and sizes in the past decades [9]. Microwave(MW)-assisted
preparation of Nano-HA(nHA) could be considered as a new
processing and heat treatment technique that was added to
various HA used preparation methods(Fig. 3). Many reviews
were published to survey the MW synthesis of many types of
Nano-materials including metallic,inorganic,polymericnano-
structures and the ircomposites [12–15]. On the other hand,the
recently published reviews on the various methods of nHA