Publications by authors named "Hans Aggstaller"
Objectives: Clinical data on all-ceramic screw-retained implant crowns (SICs) luted on titanium base abutments (TBAs) over more than 3 years are sparse. This study aimed to evaluate the clinical performance and potential risk factors for these restorations.
Materials And Methods: Analysis took place based on the medical patient-records of three dental offices.
The aim of this prospective, randomized, controlled, multicenter study was to evaluate and compare the histologic and histomorphometric aspects of extraction sockets grafted with two commercially available bovine bone xenografts: Endobon (test group) and Bio-Oss (control group). The study was designed to ensure that baseline variables between groups were as similar as possible to allow for a direct comparison of graft healing characteristics. Thirty-eight patients contributed 62 augmented extraction sites to the study.
View Article and Find Full Text PDFBackground: Various treatment options for the prosthetic treatment of jaws where all molars are lost are under discussion. Besides the placement of implants, two main treatment types can be distinguished: replacement of the missing molars with removable dental prostheses and non-replacement of the molars, i.e.
View Article and Find Full Text PDFObjective: To evaluate the effect of different preparation angles on the marginal and internal fit of zirconia single-crown copings.
Method And Materials: Three ivorine maxillary right first molars were prepared with preparation angles of 4, 8, and 12 degrees. Impressions were made of each abutment tooth to obtain 20 specimens per group.
Purpose: The aim of this prospective clinical evaluation was to show the long-term clinical behavior of resin-bonded fixed partial dentures (RBFPD) with a retentive, minimally invasive preparation design.
Materials And Methods: Since 1985, 232 RBFPDs with a retentive preparation design were placed under controlled clinical conditions. In 2005 and 2006, 84 fixed partial dentures could be re-evaluated.
The aim of this in vitro study was to evaluate the effects of different preparation designs on the fracture resistance of single-crown zirconia frameworks. To this end, maxillary molar dies of CrCo alloy were fabricated with five different preparation designs: shoulderless, slight and pronounced deep chamfer, beveled and non-beveled shoulder. Ten zirconia copings with a wall thickness of 0.
View Article and Find Full Text PDFObjectives: CAM (computer-aided manufacturing) and CAD (computer-aided design)/CAM systems facilitate the use of zirconia substructure materials for all-ceramic fixed partial dentures. This in vitro study compared the precision of fit of frameworks milled from semi-sintered zirconia blocks that were designed and machined with two CAD/CAM and one CAM system.
Methods: Three-unit posterior fixed dental prostheses (FDP) (n=10) were fabricated for standardized dies by: a milling center CAD/CAM system (Etkon), a laboratory CAD/CAM system (Cerec InLab), and a laboratory CAM system (Cercon).
Purpose: To determine the potential of 2.94 microm Er:YAG laser radiation to remove bacterial endotoxin from root surfaces.
Materials And Methods: 40 extracted teeth were divided into four groups of 10 samples each.
Objectives: This in vitro study investigated the antimicrobial effects of 2.94 microm Er:YAG laser radiation on root surfaces.
Materials And Methods: The study used 125 extracted teeth which were divided into 2 groups (A, B) of 40 teeth and 3 groups of 15 teeth (C, D, E).