Patent ID: 6997883

Claim:
Apparatus for determining the remineralization ability of a hard tissue with a measuring device ( 46 , 60 , 86 , 88 ; 104 , 114 , 116 , 86 , 88 ; 130 – 140 , 88 ; 144 – 148 , 88 ; 150 – 154 , 88 ; 156 , 86 , 88 ; 158 – 174 ) for local measurement of a physical property of the hard tissue, characterized in that the measuring device has a measuring head ( 40 ) with a rod-like probe section ( 42 ), which probe section ( 42 ) is introducible into a working channel ( 32 ) of the hard tissue and comprises a measuring element ( 46 , 60 ; 104 , 116 ; 130 , 134 , 138 ; 144 , 148 ; 150 – 154 ) being connected to the probe section ( 42 ) and responding to the physical property of porosity of the hard tissue, the measuring head ( 40 ) has a sealing element ( 54 ) which cooperates with a section of the tissue surface, and the measuring head ( 40 ) is connected to a fluid source ( 76 ; 80 ) which is under a pressure different from normal pressure, and the measuring device measures the fluid leakage through the tissue to be investigated.