International Journal of Computerized Dentistry, Pre-Print
ScienceDOI: 10.3290/j.ijcd.b4451424, PubMed ID (PMID): 3782354112. Oct 2023,Pages 1-22, Language: EnglishPrause, Elisabeth / Schmidt, Franziska / Unkovskiy, Alexey / Beuer, Florian / Hey, Jeremias
Aim: The adjustment and transfer of a stable occlusion can be a major challenge in prosthetic rehabilitations. The aim of this study was to assess a non-invasive treatment option for complex prosthetic rehabilitations and occlusal analyses using 3D-printed restorations clinically.
Materials and Methods: Eleven patients received a partial or complete rehabilitation with the aid of 3D-printed restorations (n=171). After 12 months of clinical service, all restorations were analyzed using the United States Public Health Service (USPHS) criteria.
Results: The 12-month clinical data revealed that 3D-printed restorations showed a survival rate of 84.4%. Complications occurred mostly regarding the anatomical form (7%) or marginal integrity (6AC%) and were consequently rated “Charlie” or “Delta.” Color stability and color match of 3D-printed restorations were rated “Alpha” in 83% and 73%, respectively, of all restorations. Marginal inflammation was rated “Alpha” in 89% of all restorations. An excellent surface texture and no secondary caries or postoperative sensitivities (100%) were observed.
Conclusions: 3D-printed restorations might be an alternative treatment option for initiating complex prosthetic rehabilitations. Technical complications rarely occurred. Biological complications did not occur at all. The color stability showed promising results after 12 months of clinical service. However, the results should be interpreted with caution. Long-term results with a high number of restorations should be awaited.
Keywords: 3D-printing, additive manufacturing, CAD/CAM, color stability, in vivo, wear behavior
Deutsche Zahnärztliche Zeitschrift, 3/2024
GesellschaftPages 216, Language: GermanEdelhoff, Daniel / Beuer, Florian / Güth, Jan-Frederik / Schubert, Oliver / DGPro
Nachruf der Deutschen Gesellschaft für Prothetische Zahnmedizin und Biomaterialien e. V. (DGPro)Implantologie, 2/2024
Pages 241-242, Language: GermanBeuer, Florian
Pionier der wissenschaftlichen Implantologie, Mentor und FreundInternational Journal of Computerized Dentistry, 2/2024
EditorialDOI: 10.3290/j.ijcd.b5434089, PubMed ID (PMID): 38842260Pages 135-136, Language: English, GermanBeuer, Florian
Deutsche Zahnärztliche Zeitschrift, 1/2024
BuchbesprechungPages 8, Language: GermanBeuer, Florian
von Stefan WolfartInternational Journal of Computerized Dentistry, 1/2024
EditorialDOI: 10.3290/j.ijcd.b5139819, PubMed ID (PMID): 38530271Pages 3-4, Language: English, GermanBeuer, Florian
International Journal of Computerized Dentistry, 1/2024
ScienceDOI: 10.3290/j.ijcd.b3916799, PubMed ID (PMID): 36811290Pages 89-97, Language: English, GermanHofmann, Paul / Kunz, Andreas / Schmidt, Franziska / Beuer, Florian / Duddeck, Dirk
Purpose: A reference method for quantifying contaminations on two-piece abutments manufactured using CAD/CAM has not yet been established. In the present in vitro study, a pixel-based machine learning (ML) method for detecting contamination on customized two-piece abutments was investigated and embedded in a semiautomated quantification pipeline.
Materials and methods: Forty-nine CAD/CAM zirconia abutments were fabricated and bonded to a prefabricated titanium base. All samples were analyzed for contamination by scanning electron microscopy (SEM) imaging followed by pixel-based ML and thresholding (SW) for contamination detection; quantification was performed in the postprocessing pipeline. Wilcoxon signed-rank test and Bland-Altmann plot were applied to compare both methods. The contaminated area fraction was recorded as a percentage.
Results: There was no statistically significant difference between the percentages of contamination areas (median = 0.004) measured with ML (median = 0.008) and with SW (median = 0.012), asymptotic Wilcoxon test: P = 0.22. The Bland-Altmann plot demonstrated a mean difference of -0.006% (95% confidence interval [CI] from -0.011% to 0.0001%) with increased values from a contamination area fraction of > 0.03% for ML.
Conclusion: Both segmentation methods showed comparable results in evaluating surface cleanliness; pixel-based ML is a promising assessment tool for detecting external contaminations on zirconia abutments. Further studies are required to investigate the clinical performance of this tool.
Keywords: computer-aided design, scanning electron microscopy, machine learning, ultrasonics, hygiene, dental implant abutments
QZ - Quintessenz Zahntechnik, 9/2023
BuchbesprechungPages 886-888, Language: GermanBeuer, Florian
Quintessence International, 9/2023
DOI: 10.3290/j.qi.b4366813, PubMed ID (PMID): 37724999Pages 746-749, Language: EnglishKohnen, Luisa Valentina / Beuer, Florian / Hey, Jeremias / Adali, Ufuk
Objectives: Addressing a single-tooth gap in the anterior region, resulting from aplasia or trauma, poses both esthetic and functional challenges. This case report presents the restoration of a young adult with a cleft, exhibiting anterior hypoplasia and aplasia in the canine and incisor regions, using all-ceramic cantilever resin-bonded fixed dental prostheses.
Method and materials: After verification of esthetic and functional considerations through a diagnostic wax-up and an intraoral mock-up, three anterior all-ceramic cantilever resin-bonded fixed dental prostheses made of veneered zirconium dioxide were planned in the region of the maxillary right lateral incisor and maxillary left canine. The impression was made with an intraoral scanner. The framework fit was evaluated. Glaze firing and full adhesive cementation under rubber dam followed.
Results: The final restoration met the patients’ expectations and restored facial esthetics and function.
Conclusions: All-ceramic cantilever resin-bonded fixed dental prostheses offer a promising minimally invasive therapeutic option for cleft patients.
Keywords: aplasia, cantilever, cleft of lip and palate, prosthodontics, resin-bonded fixed dental prosthesis (RBFDP), veneered zirconium dioxide
International Journal of Periodontics & Restorative Dentistry, 5/2023
DOI: 10.11607/prd.6155, PubMed ID (PMID): 37733468Pages 561-569, Language: EnglishBruhnke, Maria / Krastl, Gabriel / Neumeyer, Stefan / Beuer, Florian / Herklotz, Insa / Naumann, Michael
The purpose of this clinical study was to assess the feasibility of forced orthodontic extrusion with the Tissue Master Concept to retain subgingivally fractured teeth as abutments for which extraction and replacement would be equal treatment opportunities. Participants were recruited from a group of consecutive patients in need of prosthodontic rehabilitation. In total, 36 deeply destroyed teeth in 31 patients underwent forced orthodontic extrusion with forces exceeding 50 g to reestablish biologic width and ensure a 2-mm dentin-ferrule design prior to single-crown restoration. The primary endpoint was the success of the extrusion in terms of the ability to restore the respective abutment tooth. Information about overall treatment time, frequency, and reasons for failure were collected. Four patients dropped out of the treatment. For the remaining 27 participants, data were fully collected. The amount of extrusion ranged between 2 and 6 mm (3.5 ± 0.9 mm), and the mean duration until retention was 20 ± 12 days. On average, patients returned three (± 3) times for control visits after extrusion. Adhesive failure (n = 6) and orthodontic relapse (n = 2) were the most frequent complication types. Forced orthodontic extrusion may be a useful tool to restore teeth evaluated as nonrestorable.