Poj Dab Poj Ntxoog Caum

Giant femur taub hau qhia osteoporosis lub taub hau thiab sab saud kawg ntawm tus neeg laus poj niam tau faib ntev ua ke thiab hinged. Ib ntawm ib nrab yog qhov qub, lwm qhov qhia tau hais tias qhov teebmeem ntawm txha pob txha nyob rau saum npoo ntawm pob txha. Mounted ntawm lub hauv paus