Retention of metal ceramic crowns cemented with resin cements: Effects of preparation taper and height

Multifactorial analysis of the impact of different manufacturing processes on the marginal fit of zirconia copings

“…If the workspace offers a challenge with respect to moisture control (i.e., subgingival preparation borders), conventional luting is more practicable than an adhesive cementation. However, this approach requires retentionenhancing factors such as nearly parallel-prepared walls or an adequate axial height 24,25) . Therefore, the axial taper in the present study was set at 4° (2×2°) in combination with an appropriate axial height (4-5 mm) to simulate suitable conditions for conventional luting.…”

“…Another parameter affecting the retention of full dental crowns is the axial height of the prepared abutment. Previous studies have demonstrated that separation forces are signifi cantly increased on higher abutments 24,25) . This factor seems to be crucial, especially for the non-adhesive conventional luting of dental restorations 24,25) .…”

“…Previous studies have demonstrated that separation forces are signifi cantly increased on higher abutments 24,25) . This factor seems to be crucial, especially for the non-adhesive conventional luting of dental restorations 24,25) . To reduce the risk of retention loss, a more retentive preparation design with an axial taper Multifactorial analysis of the impact of different manufacturing processes on the marginal fi t of zirconia copings Fig.…”

Convergence Angles of Clinical Tooth Preparations for Metal Ceramic Restorations Among Dental Students and General Practitioners

“…Other researchers have recommended TOC between 10 degrees and 16 on the basis of laboratory studies (7)(8)(9)(10)(11)(12)(13)(14). Goodacre et al (15,16) proposed that the total TOC should range between 10 degrees and 20 degrees.…”

Vertical marginal gap & retention of ceramic full coverage & inlay retained ceramic fixed partial dentures

“…Many factors have been demonstrated to influence the retention of fixed prosthetic appliances, such as the size and shape of prepared teeth [33], manipulation of cement [34][35][36], retentive properties of cement [37][38][39], cement film thickness [40,41], relieving space or venting for cement [42,43] , cement application [44], roughness of dentinal surface [45], the convergence and the preparation height [46][47][48][49]. Dental literature is poor on studying the retentive strength of the inlay retained ceramic FPDs.…”