The periodontist will also take a small measuring instrument called a probe and place it between the teeth and gums to determine the depth of those spaces, known as periodontal pockets; this helps the periodontist assess the health of the gums.
The ground substance of connective tissue is different from all of these fluids; it is the liquid medium through which these other fluid exchanges take place.
The ground substance of connective tissue contains structural proteins called fibers. 1  There are three types of connective tissue fibers: 2  Collagen fibers are the most abundant fiber type. They have a high tensile strength but are also flexible.