@article{JockelSchneiderStoelzelHessetal.2022,
  author    = {Jockel-Schneider, Yvonne and Stoelzel, Peggy and Hess, Jeanine and Haubitz, Imme and Fickl, Stefan and Schlagenhauf, Ulrich},
  title     = {Impact of a specific collagen peptide food supplement on periodontal inflammation in aftercare patients — a randomised controlled trial},
  series = {Nutrients},
  volume    = {14},
  journal   = {Nutrients},
  number    = {21},
  issn      = {2072-6643},
  doi       = {10.3390/nu14214473},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-290471},
  year      = {2022},
  abstract  = {Background: This controlled clinical trial evaluated the impact of a specific collagen peptide food supplement on parameters of periodontal inflammation in aftercare patients. Methods: A total of 39 study patients were enrolled. At baseline, bleeding on probing (BoP; primary outcome), gingival index (GI), plaque control record (PCR), recession (REC) and probing pocket depth (PPD) for the calculation of the periodontal inflamed surface area (PISA) were documented. After subsequent professional mechanical plaque removal (PMPR), participants were randomly provided with a supply of sachets containing either a specific collagen peptide preparation (test group; n = 20) or a placebo (placebo group; n = 19) to be consumed dissolved in liquid once daily until reevaluation at day 90. Results: PMPR supplemented with the consumption of the specific collagen peptides resulted in a significantly lower mean percentage of persisting BoP-positive sites than PMPR plus placebo (test: 10.4\% baseline vs. 3.0\% reevaluation; placebo: 14.2\% baseline vs. 9.4\% reevaluation; effect size: 0.86). Mean PISA and GI values were also reduced compared to baseline, with a significant difference in favor of the test group (PISA test: 170.6 mm\(^2\) baseline vs. 53.7 mm\(^2\) reevaluation; PISA placebo: 229.4 mm\(^2\) baseline vs. 184.3 mm\(^2\) reevaluation; GI test: 0.5 baseline vs. 0.1 reevaluation; GI placebo: 0.4 baseline vs. 0.3 reevaluation). PCR was also significantly decreased in both experimental groups at revaluation, but the difference between the groups did not reach the level of significance. Conclusions: The supplementary intake of specific collagen peptides may further enhance the anti-inflammatory effect of PMPR in periodontal recall patients.},
  language  = {en}
}
@article{HahnHaubitzKrugetal.2022,
  author    = {Hahn, Britta and Haubitz, Imme and Krug, Ralf and Krastl, Gabriel and Soliman, Sebastian},
  title     = {Influence of matrix type on marginal gap formation of deep class II bulk-fill composite restorations},
  series = {International Journal of Environmental Research and Public Health},
  volume    = {19},
  journal   = {International Journal of Environmental Research and Public Health},
  number    = {9},
  issn      = {1660-4601},
  doi       = {10.3390/ijerph19094961},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-270712},
  year      = {2022},
  abstract  = {Background: To test the hypothesis that transparent matrices result in more continuous margins of bulk-fill composite (BFC) restorations than metal matrices. Methods: Forty standardized MOD cavities in human molars with cervical margins in enamel and dentin were created and randomly assigned to four restorative treatment protocols: conventional nanohybrid composite (NANO) restoration (Tetric EvoCeram, Ivoclar Vivadent, Schaan, Liechtenstein) with a metal matrix (NANO-METAL) versus transparent matrix (NANO-TRANS), and bulk-fill composite restoration (Tetric EvoCeram Bulk Fill, Ivoclar Vivadent, Schaan, Liechtenstein) with a metal matrix (BFC-METAL) versus transparent matrix (BFC-TRANS). After artificial aging (2500 thermal cycles), marginal quality was evaluated by scanning electron microscopy using the replica technique. Statistical analyses were performed using the Mann-Whitney U-test and Wilcoxon test. The level of significance was p < 0.05. Results: Metal matrices yielded significantly (p = 0.0011) more continuous margins (46.211\%) than transparent matrices (27.073\%). Differences in continuous margins between NANO (34.482\%) and BFC (38.802\%) were not significant (p = 0.56). Matrix type did not influence marginal gap formation in BFC (p = 0.27) but did in NANO restorations (p = 0.001). Conclusion: Metal matrices positively influence the marginal quality of class II composite restorations, especially in deep cavity areas. The bulk-fill composite seems to be less sensitive to the influence of factors such as light polymerization and matrix type.},
  language  = {en}
}