Continues..A 5-year Clinical Follow-Up Study of Procera® AllCeram Crowns This prospective study was initiated to evaluate the clinical performance of 100 Procera® AllCeram crowns after five years in service. One hundred Procera® AllCeram crowns were fabricated for 58 patients (20 men and 38 women). Patients were treated by four general dental practitioners. Crown placement involved both the anterior and posterior regions of the dental arches. Crowns were examined at baseline and once a year during the five years that followed and evaluated at each appointment with the California Dental Association's quality assessment system. Of the 97 crowns remaining in the study after five years, only three crowns had experienced a fracture through the veneering porcelain and the aluminum oxide coping material. Two additional crowns were replaced as a result of fractures of only the veneering porcelain. One crown was replaced as a result of recurring caries. All remaining crowns were ranked as either excellent or acceptable for surface/color, anatomic form and marginal integrity. The five year clinical observations and ranking with the California Dental Association’s quality assessment criteria supported the conclusion that Procera® AllCeram crowns may be used in all areas of the mouth. |
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