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.
Collagenous connective tissue is divided into two types, based upon the ratio of collagen fibers to ground substance: 1  Loose (areolar connective tissue) is the most abundant form of collagenous connective tissue.  Dense connective tissue is enriched in collagen fibers with little ground substance.