The aim of this clinical study was to test whether or not digital workflows for the fabrication of crowns render different clinical outcomes from the conventional pathway with respect to (1) crown ...quality, and (2) time efficiency.
For each of the 10 patients in need of one tooth-supported crown, five monolithic crowns were produced out of lithium disilicate reinforced glass ceramic. Four different optical impression and associated computer-aided design/computer-aided manufacturing (CAD/CAM) systems were used for crown fabrication (digital workflows): (1) Lava C.O.S. scanner and Lava C.O.S. and CARES CAD software, centralized CAM (group L); (2) Cadent iTero scanner, CARES CAD software and centralized CAM (group iT); (3) Cerec Bluecam, Cerec Connect CAD software, followed by laboratory-based CAM (group CiL); and (4) centralized CAM (group CiD). The conventional crown (group K) was fabricated based on a conventional silicone impression followed by a conventional wax-up and heat press technique. The examiners were blinded and evaluated the crowns clinically at the bisque-bake stage (initial try-in), and subsequently after finalization by a dental technician (final try-in). For the assessment of crown quality, modified United States Public Health Service (USPHS) criteria were used. Treatment times were recorded for clinical evaluation and adjustment. The quality ratings were analyzed descriptively. For both the continuous and ordinal outcomes, the non-parametric paired Wilcoxon test was applied, together with an appropriate Bonferroni correction to evaluate the differences between treatment groups. The results of the statistical analysis were interpreted globally at the significance level P = 0.05.
The clinical evaluation during the initial and final try-ins demonstrated similar clinical outcome measures for crowns generated with the four digital workflows and the conventional workflow. No statistically significant differences of crown quality in any state were found between groups (P > 0.005). The total clinical treatment times measured were: 456 ± 240 s for L; 655 ± 374 s for iT; 783 ± 403 s for CiL; 556 ± 285 s for CiD; and 833 ± 451 s for K. No statistically significant differences in treatment times were found between the groups (P > 0.05).
Within the limitations of the present study, the monolithic ceramic crowns resulting from the four different CAD/CAM systems did not differ from the conventionally produced crowns with respect to the clinical quality rating and the treatment time efficiency.
Jewish Veganism and Vegetarianism Jacob Ari Labendz, Shmuly Yanklowitz / Jacob Ari Labendz, Shmuly Yanklowitz
2019, 2019-04-01
eBook
In recent decades, as more Jews have adopted plant-based lifestyles, Jewish vegan and vegetarian movements have become increasingly prominent. This book explores the intellectual, religious, and ...historical roots of veganism and vegetarianism among Jews and presents compelling new directions in Jewish thought, ethics, and foodways. The contributors, including scholars, rabbis, and activists, explore how Judaism has inspired Jews to eschew animal products and how such choices, even when not directly inspired by Judaism, have enriched and helped define Jewishness. Individually, and as a collection, the chapters in this book provide an opportunity to meditate on what may make veganism and vegetarianism particularly Jewish, as well as the potential distinctiveness of Jewish veganism and vegetarianism. The authors also examine the connections between Jewish veganism and vegetarianism and other movements, while calling attention to divisions among Jewish vegans and vegetarians, to the specific challenges of fusing Jewishness and a plant-based lifestyle, and to the resistance Jewish vegans and vegetarians can face from parts of the Jewish community. The book's various perspectives represent the cultural, theological, and ideological diversity among Jews invested in such conversations and introduce prominent debates within their movements.
Patient: The patient was a 70-year-old male who came to our hospital complaining of chewing difficulty due to teeth movement. Resorption of alveolar bone in the whole jaw and movements of multiple ...teeth caused by severe chronic periodontitis, mismatches and secondary caries of crown margins were observed. After periodontal treatment using treatment dentures and judging the predictability of the remaining teeth, the upper jaw was fitted with a complete titanium-based denture, the lower jaw was fitted with a Konus Krone denture, and the occlusion was reconstructed.Discussion: Due to the secondary splinting effect and easy cleaning of the Konus Krone denture, the remaining teeth maintain good periodontal tissue condition.Conclusion: A stable prognosis with improved mastication was achieved with the complete denture and the Konus Krone denture after periodontal treatment.
