Three-year clinical observation and failure analysis of all-ceramic restorations made by chair-side computer aided design and computer aided manufacture system / 中华口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To evaluate 3-year clinical performance of restorations made by chair-side computer aided design and computer aided manufacture (CAD/CAM) system and analyze possible failure reasons.</p><p><b>METHODS</b>Thirty-two single-tooth large all-ceramic restorations were fabricated using a computer aided design and computer aided manufacture (CAD/CAM) system. Fourteen premolars and 18 molars were restored with machined porcelain blocks. Of these 11 inlays, 10 crowns, and 11 endocrowns were finished respectively. The integrity and marginal fitness were evaluated at 3 years after insertion.</p><p><b>RESULTS</b>Twenty-eight restorations were rated as good; 2 were fractured (1 molar-crown and 1 molar-inlay) and had to be replaced; and 2 were found marginal defects (1 molar-inlay and 1 premolar-inlay). The failures occurred mostly in the inlays and molars.</p><p><b>CONCLUSIONS</b>With proper indication selection and careful tooth preparation, restorations with chair-side CAD/CAM were clinical success both in function and esthetics.</p>