Dental Health Center 2000.

The Dental Health Center concept is proposed as a method to maintain control of the dental delivery system while delegating the dentist's managerial and supervisory responsibilities to well-trained business executives. The Center would be a uniquely designed facility that operates 12 hours per day, 6 days a week for 50 weeks of the year. The participating dentists relocate their practices to the facility at a practice purchase price determined by the dentist, paid half in cash and half in center stock. In return, the dentists agree to produce that practice purchase price annually; in turn, they receive 45 percent of their monthly collected dental service fees and have access to all the services of the Center.

Television radiographic evaluation of periapical osseous radiolucencies.

Periapical lesions were experimentally induced in forty-five teeth of seven beagle dogs by both septic and aseptic techniques. Preoperative and postoperative serial radiographs were produced with a specifically designed animal head x-ray device, at 30-, 60-, and 90-day periods. Four anatomic study areas, which consisted of the cervical, interradicular, proximal root, and periapical areas of each tooth, were evaluated by viewbox observation of radiographs, television subtraction radiographic imagery, and histologic examination. The findings obtained with the subtracted image and histologic examinations were correlated with viewbox observations. Diagnostic evidence of periapical pathosis was identified in the subtracted image 7 to 42 days before this same evidence was noted on the viewbox radiograph. The periodontal membrane space, lamina dura, bone trabeculae, and medullary spaces were markedly enhanced, with defined outlines of the periapical lesions noted in the subtracted image.