Effect of restoration quality on periodontal health

Influence of various gypsum materials on precision of fit of CAD/CAM-fabricated zirconia copings

“…If the marginal adaptation is poor, the prosthesis can cause periodontal diseases and dental caries. Marginal maladaptation can also result in the complete displacement of the prosthesis 17,18) . For example, if the internal gap is too large, then there can be problems with stability, as this characteristic of the prosthesis is almost entirely dependent on the cement used rather than tooth formation.…”

Clinical evaluation of all-ceramic crowns fabricated from intraoral digital impressions based on the principle of active wavefront sampling

“…Sizable marginal discrepancies can expose the luting material to the oral environment, leading to a more aggressive rate of cement dissolution, caused by oral fluids and chemo-mechanical forces. 7 Marginal gaps can promote plaque accumulation which may result in inflammation of the periodontal tissues [8][9][10][11][12][13][14] as well as secondary caries at the crown margin. 7,15 The aim of this randomized controlled examiner-blinded clinical trial was to test the accuracy of Lava C.O.S.…”

Marginal and internal adaptation of milled cobalt-chromium copings

“…16 This gap can be viewed as a physical roughness and may eventually lead to periodontal inflammation, caries, and loss of the restoration. [17][18][19] The adaptation of a restoration can be defined in terms of misfit measured at various points of the restoration and the tooth along the internal surface, at the margin, or on the external surface of the casting. 20 This misfit represents the available cement space.…”