Ochronotic densification.
D002130:Calcium Phosphates / Q000032:analysis; D006801:Humans; D006882:Hydroxyapatites / Q000032:analysis; D007403:Intervertebral Disc / Q000032:analysis*; D009794:Ochronosis / Q000378:metabolism*; D013583:Synovial Membrane / Q000032:analysis; D014961:X-Ray Diffraction
D002130:Calcium Phosphates; D006882:Hydroxyapatites