They were first described by Fullmer & Lillie ( 1958 ) in periodontal membranes.
2.
When braces put pressure on teeth, the periodontal membrane stretches on one side and is compressed on the other.
3.
When braces put pressure on one's teeth, the periodontal membrane stretches on one side and is compressed on the other.
4.
It is defined as an odontogenic cyst of Inflammatory origin that is preceded by a chronic periapical granuloma and stimulation of cell rests of malassez present in the periodontal membrane.
5.
:" " the length of the periodontal membrane attachment of the abutment tooth should be at least one half to two thirds of that of its normal root attachment " ".