Examining the adaptation of modified endocrowns prepared with CAD-CAM in maxillary and mandibular molars: A microcomputed tomography study

Effect of Preparation Design on Marginal Integrity and Fracture Resistance of Endocrowns: A Systematic Review

“…Among 200 studies from the initial search, 15 abstracts were selected for further evaluation. Nine full text articles were included after assessing the involved abstracts [ 2 , 14 - 21 ]. One study was excluded due to the specimens’ type which were central theeth [ 2 ].…”

“…( Table 3 ) The specimens of 7 studies were human mandibular molars [ 15 - 20 , 24 ], two studies used maxillary premolars [ 22 , 23 ] , one study maxillary molars [ 25 ], one study maxillary and mandibular [ 21 ] molars, one study mandibular [ 25 ] premolars, one study third molars [ 12 ], two study premolars [ 9 , 27 ], and in just one study, acrylic mandibular molars [ 14 ] were applied. Shin et al [ 15 ], Darwish et al [ 22 ], Gaintantzopoulou et al [ 14 ], Abo-Elmagd et al [ 26 ] and Topkara et al [ 21 ] assessed the marginal adaptation, Taha et al [ 17 ], Dartora et al[ 16 ] and Einhorn et al [ 18 ], Haralur et al [ 9 ], Haralur et al [ 19 ], Alamin et al [ 25 ], Hayes et al [ 24 ], de Kuijper et al [ 12 ], Lise et al [ 27 ] and Ghoul et al [ 20 ] evaluated the fracture resistance and Rocca et al [ 23 ] investigated both the marginal integrity and fatigue resistance of the specimens. The evaluated influencing items in preparation design were as follows: cavity depth, ferrule effect, internal divergence angle, finish line, and adding vents inside pulp chamber.…”

“…According to Tobakara et al study, internal and marginal adaptation of endocrowns differ between maxillary and mandibular molars. Furthermore, it is suggested to provide 10-degree convergence in case of implementing ferrule in the preparation design [ 21 ].…”

Internal fit evaluation of indirect restorations fabricated from CAD/CAM composite blocks versus ceramic blocks in badly broken teeth using cone beam CT (CBCT): double-blinded randomized clinical trial

“…Most of the studies available in literature that compare the physico-mechanical properties of these materials were conducted in vitro, so the present study aimed to compare the clinical performance of indirect esthetic restorations fabricated from nano hybrid composite CAD CAM blocks (Grandio blocks) and ceramic blocks (e-max) after one year. In this study, it was assumed that each type of indirect restoration used to dictate certain preparation design and the degree of divergence of the cavity wall to optimum clinical performance would not have an impact on the internal fit owing to the scanning accuracy of 3-dimensional scanners [ 34 ].…”

“…The marginal and internal adaptations of restorations are very crucial for their clinical outcome. Restoration with poor marginal adaptation would conversely increase the cement thickness and degradation of adhesive cement, with subsequent marginal discoloration and recurrent caries or accumulation of debris and plaque with subsequent ginigival and periodontal inflammation and pockets formation [ 34 ]. Similar inflammatory reaction would occurs in case of improperly fitted crowns or crowns over implant resulting in periimplantitis [ 17 , 19 , 21 ].…”