Mechanical Stability of Zirconia Meso-abutments Bonded to Titanium Bases Restored with Different Monolithic All-Ceramic Crowns

Artificial intelligence in fixed implant prosthodontics: a retrospective study of 106 implant-supported monolithic zirconia crowns inserted in the posterior jaws of 90 patients

“…This can be important from a mechanical point of view, as it could help reduce prosthetic complications. In fact, the direct cementation of fixed superstructures (crowns, bridges) on titanium gluing bases is still not adequately documented in literature, and may lead to the onset of mechanical complications [2,37]. The titanium gluing bases, in fact, are prefabricated and have standard height/ thickness, therefore may not withstand in the medium-and long term, the occlusal forces transmitted by monolithic structures characterized by larger dimensions [2,37].…”

“…In fact, the direct cementation of fixed superstructures (crowns, bridges) on titanium gluing bases is still not adequately documented in literature, and may lead to the onset of mechanical complications [2,37]. The titanium gluing bases, in fact, are prefabricated and have standard height/ thickness, therefore may not withstand in the medium-and long term, the occlusal forces transmitted by monolithic structures characterized by larger dimensions [2,37]. In addition, with the present AI protocol, as previously reported [9] it is possible to mathematically evaluate and therefore to exactly quantify the degree of error, in the fabrication (milling/ sintering) of the individual zirconia abutment.…”

“…An implant-supported restoration was defined as 'successful' if it did not present any complication during the whole period after delivery [9,19]. The restoration was considered 'unsuccessful' if, although not failed and still physically present in the mouth, it presented or had presented during the period of follow-up any biological complications (peri-implant mucositis with gingival swelling, discomfort, and/or bleeding [20]; and/or periimplantitis with pain, suppuration, bleeding, and/or marginal bone resorption [21]); prosthetic (mechanical) complications [22,23] (problems affecting pre-formed components sold by the manufacturer, such as the loss of connection between abutment and implant, or fracture of the fixture or bonding base); or technical complications [23,24], (problems affecting the components designed by the dental technician, such as debonding of the upper portion of the zirconia abutment from the titanium base, fracture of the upper portion of the zirconia abutment, or decementation or chipping of the MZC [2,10,11]).…”

“…In implant-supported digital fixed prosthesis, one ideal option today is the use of customised abutments [1][2][3]. These custom abutments, designed with computer-aided design (CAD) software and subsequently milled and sintered in zirconia, are cemented extraorally on titanium bonding bases.…”

Personalized Choice of Structural Materials for Artificial Crowns From the Level of Multi-Unit Abutment or Titanium Platform for Direct Prosthetics on Dental Implants

“…Результати проведеного експериментального дослідження J. Pitta et al свідчать, що матеріали: склокераміка на основі дисилікату літію, діоксид цирконію та гібридна кераміка, модифікована композитом, -володіють хорошою механічною стабільністю при застосуванні їх в якості конструкційних матеріалів для коронки з комбінованими індивідуальними абатментами на ДІ [15]. Проте варто відзначити, що при аналізі згинальних моментів матеріалів, більш високі середні показники (р<0,05) були характерні для гібридної кераміки у порівнянні з склокерамікою на основі дисилікату літію та діоксидом цирконію.…”