Signs of in-vivo aging of zirconia from explanted dental implants with porous coating after several years in function.

The present study investigated the in vivo aging of yttria-stabilized zirconia (YSZ) oral implants (ZiUnite®) removed after 37 to 181 months. These implants featured a porous zirconia surface to enhance osseointegration. They were placed in prospective clinical investigations and had to be explanted due to peri‑implant bone breakdown.

Digitization of Dentate and Edentulous Maxillectomy and Mandibulectomy Defects with Three Different Intraoral Scanners: A Comparative In Vitro Study.

: The objective of this study was to compare the trueness and precision of three intraoral scanners (IOSs) for the digitization of dentate and edentulous maxillectomy and mandibulectomy defects in artificial models. Four representative defect models-a dentate and an edentulous maxillectomy model and a dentate and an edentulous mandibulectomy model-were used for digital scanning. After a reference scan of each model, they were scanned with three IOSs: CEREC AC Omnicam, True Definition, and cara TRIOS 3.

Single mandibular implant study - impact on dietary habits after 5 years of observation in patients with immediate and delayed loading protocols.

Objectives: Single midline implants in the edentulous mandible can be used to support existing complete dentures to improve patients' satisfaction and masticatory efficiency. The impact on patients' dietary habits and the influence of the loading protocol of the implants was the subject of this study.

Materials And Methods: In this prospective randomized clinical trial, edentulous patients with existing complete dentures in both jaws were treated with a single midline implant in the mandible.

Survival, technical and biological outcome of fixed tooth- and implant-supported restorations: A retrospective analysis of a patient cohort treated in an undergraduate dental education program.

Objectives: There is a paucity of data on the outcome of fixed tooth- and implant-supported porcelain-fused-to-metal (PFM) and ceramic-based (CB) restorations fabricated during undergraduate dental education. Therefore, this retrospective study examined the outcome of fixed restorations placed in patients participating in an undergraduate program.

Methods: Patient records were searched for data on fixed PFM and CB restorations.

Fracture Resistance of a Bone-Level Two-Piece Zirconia Oral Implant System-The Influence of Artificial Loading and Hydrothermal Aging.

Preclinical and clinical research on two-piece zirconia implants are warranted. Therefore, we evaluated the in vitro fracture resistance of such a zirconia oral implant system. The present study comprised 32 two-piece zirconia implants and abutments attached to the implants using a titanium ( = 16) or a zirconia abutment screw ( = 16).