Background: The prolapse of intervertebral disc is not only damage of the local intervertebral disc, but a comprehensive damage tightly related with factors as
Background: The cause of paroxysmal deafness is unknown.It is a nerve deafness that has mostly hearing handicap and harried onset.At present,the disease is usua
Objective To investigated the biological procedure of allograft decalcified bone matrix(DBM)and bone cement(BC)combined with bovine bone morphogenetic protein (