Marginal adaptation and microleakage of Procera AllCeram crowns with four cements

Comparison of the marginal fit of different coping materials and designs produced by computer aided manufacturing systems

“…Optimal marginal adaptation is an important factor in the biologic and mechanical stabilization of the fixed prosthesis. Increased marginal discrepancy causes maladjusted restorations and results in a high risk of periodontal diseases and tooth decay 7,8,12) . For full ceramic crowns, a marginal gap between 1 and 165 µm is considered acceptable 13,14) .…”

“…Marginal gaps can cause carious teeth, cement resolution, defected margins, subgingival microflora changes, periodontal destruction and periapical lesions resulting in pulpal effect. For these reasons, marginal fit plays a significant role in the longevity of restorations [6][7][8][9] . This aim of study compared the marginal fit of four different coping materials created by MAD/CAM or CAD/ CAM.…”

Effect of air-abrasion on the retention of zirconia ceramic crowns luted with different cements before and after artificial aging

“…Certain preparation guidelines that differ from recommendations for metal-supported systems have to be taken into consideration for allceramic FPDs. Nevertheless all-ceramic restorations exhibit an inferior overall fit compared with cast metal or metal-ceramic restorations [59][60][61].…”

Comparative analysis of 3D data visibility of the prepared tooth finishing line on a synthetic jaw model, captured by international scanners in a laboratory conditions

“…Во многих исследованиях продемонстрировано, что нарушение краевого прилега-ния реставраций, изготовленных методом CAD/CAM, ас-социировано с различными факторами, например, таки-ми как вид границы препарирования, толщина слоя лака на гипсовой модели, тип материала для цементирования [10][11][12][13]. Более того, существуют разные мнения по пово-ду используемого программного обеспечения, точности фрезерования и их влияния на посадку CAD/CAM-реставрации [14][15][16][17][18][19]. Но нет достаточных данных о точ-ности отображения границы препарирования при скани-ровании, влиянии на нее разных вариантов ретракции десны и расположения уступа по отношению к десне.…”