The study of this study is to evaluate the age influence on cortical bone by two methods: HR-pQCT and ultrasound.~84 patients will be measured. The cohort will be:~21 women less than 70~21 women more than 70~21 men less than 70~21 men more than 70 Measurement will be performed at radius and at tibia (ultra-distal and distal). For all the sites one measurement will be performed by HR-pQCT to get reference values of thickness and BMDs. For the distal positions and additional measurement will be performed by an innovative ultrasound device that estimates cortical thickness and porosity.~The participation to the study implies only a participation of one hour from the patient (30min for HR-pQCT measurements, 30 min for US).~The main objectives consist in :~evaluating the age influence on cortical thickness at 1/3 distal radius measured by US~evaluating the age influence on cortical thickness at distal tibia measured by US~comparing porosities values measured by US to vBMD obtained by HR-pQCT~comparing cortical thickness values measured by HR-pQCT at 1/3 distal radius position to ultra-distal radus position and to the tibia~comparing vBMD values measured by HRpQCT at 1/3 distal radius position to ultra-distal radius position and to the tibia
The study of this study is to evaluate the age influence on cortical bone strength properties by two methods:HR-pQCT (HighResolution-peripheral quantitativeComputedTomography) and ultrasound. The main objective consists in the evaluation of the age influence on cortical thickness at 1/3 distal radius measured by US.