Device and method for subgingival measurement

A system for identifying subgingival margin regions comprising:

• an elongate body having a body longitudinal axis, sized and shaped to be inserted into a human patient's mouth, and comprising:
• an elongate measurement element comprising a proximal end and a distal end, said elongate measurement element being connected to said elongate body at said proximal end, said elongate measurement element extending from said elongate body, along a measurement element axis which is different to said body longitudinal axis, said elongate measurement element comprising a tip at said distal end and adapted to be placed between a gingiva and a tooth;
• and
• an imager with a field of view configured to extend in a direction of said measurement element axis, said imager being positioned near said elongate measurement element so said field of view captures said measurement element from above, in a general direction from said proximal end to said distal end;
• and
• circuitry configured to analyze an image acquired by said imager and reconstruct a three-dimensional location of said tip when said tip is between said gingiva and the tooth, thereby measuring subgingival margin regions.