DEVICE FOR MEASURING PERIODONTAL POUCH DEPTH Russian patent published in 2001 - IPC

FIELD: medical engineering. SUBSTANCE: device has casing, probe needle, curved tubular guide member, drive unit and displacement indication unit. Drive unit for carrying out reciprocal movement of the probe needle is manufactured as piston mounted in the casing. The piston has conic end and a spring which one end is attached to it. The other spring end is fixed inside the casing on the tubular guide member passing inside the casing. The probe needle comes through the tubular guide member and spring. Needle end is rigidly fixed in conic piston part which end is engageable with the displacement indication unit. The displacement indication unit is designed as flat scale member with millimeter division marks on both sides. The scale member is placed in transparent part of the casing and is engageable with pressure member. The pressure member is mounted on casing end face. The transparent part of the casing is rotatable. EFFECT: high accuracy of measurements. 2 cl, 1 dwg