 Radiographic examination Standardized radiographs are obtained of test teeth by modified film holders VIP 2 Positioning, UpRad Corp., Fort Lauderdale, FL, USA. These are done routinely in the clinical setting, after antiinfective and immediately before surgical treatment. Intraoral size 0 and 2 dental films Insight, Eastman Kodak Co., Rochester, NY, USA are exposed using an x-ray source Heliodent DS, Sirona, Bensheim, Germany with 7 mA and 60 kVp and developed under standardized conditions XR24pro, Dürr Dental GmbH, Bietigheim-Bissingen, Germany. 