<P> The mineral content of alveolar bone is mostly calcium hydroxyapatite , which is similar to that found in higher percentages in both enamel and dentin , but is most similar to the levels in cementum ( 50 % ) . Like all bone , mature alveolar bone is by weight 60 % mineralized or inorganic material , 25 % organic material , and 15 % water . The minerals of potassium , manganese , magnesium , silica , iron , zinc , selenium , boron , phosphorus , sulfur , chromium , and others are also present but in smaller amounts . Alveolar bone is more easily remodeled than cementum , thus allowing orthodontic tooth movement . When viewing a stained histological section , the remodeled alveolar bone shows arrest lines and reversal lines , as does all bone tissue . </P>
of what mineral are the hard tissues of the teeth and alveolar bone composed
calcium hydroxyapatite