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2. Procera AllCeram crowns followed for 5 to 10.5 years. A prospective clinical study;Ödmann;Int J Prosthodont,2001
3. A split-mouth randomized clinical trial of single crowns retained with resin-modified glass-ionomer and zinc phosphate luting cements;Jokstad;Int J Prosthodont,2004
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5. Longevity and quality of FPDs: A retrospective study of restorations 30, 20, and 10 years after insertion;Holm;Int J Prosthodont,2003