Extreme widening of the periodontal ligament as seen in the radiograph is the characteristic feature of:: (A) Scleroderma, (B) Paget's disease, (C) Pemphigus, (D) All of the above
Answer is A. Extreme widening of the periodontal ligament, two to four times the normal thickness has been reported originally by Stafne and Austin as characteristic of scleroderma.