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3.  Lee D-J, Ryo J-S, Shimono M, Lee K-W Lee J-M, Jung H-S: Differential healing patterns of mucosal seal on zirconia and titanium implants. Front. Physiol. 10:796. doi: 10.3389/fphys.2019.00796

4. Thoma DS, Sailer I, Mühleman S, Gil A, Jung RE, Hämmerle CHF. Randomized controlled clinical study of veneered zirconia abutments for single implant crowns: Clinical, histological, and microbiological outcomes. Clin Implant. 2018 Dec;20(6):988-996. doi:10.1111/cid.12674. Epub 2018 Oct 17.

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7. Kajiwara N, Masaki C, Mukaibo T, Kondo Y, Nakamoto T, Hosokawa R. Soft tissue biological response to zirconia and metal implant abutments compared with natural tooth: microcirculation monitoring as a novel bioindicator. Implant Dent. 2015 Feb;24(1):37-41. doi: 10.1097/ID.0000000000000167.PMID: 25290282

8. Roehling S, Astasov-Frauenhoffer M, Hauser-Gerspach I, Braissant O, Woelfler H, Waltimo T, Kniha H, Gahlert M.J In Vitro Biofilm Formation on Titanium and Zirconia Implant Surfaces. Periodontol. 2017 Mar;88(3):298-307. doi: 10.1902/jop.2016.160245. Epub 2016 Oct 7.PMID: 27712464

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15. Peri-implant mucositis and peri-implantitis: clinical and histopathological characteristics and treatment.  Khammissa RA, Feller L., Meyerov R., Lemmer J.  SADJ. 2021 Apr; 67(3): 122, 124 – 6

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18. Study on mini-pigs Dr. Peter Schüpbach, Dr. Roland Glauser - in preparation - will be released 2021

19. Results of zirconia implants after 5 years of clinical performance – a retrospective study Dr. Sofia Karapataki - in preparation - will be released 2021

20. Prospective long-term Study over 9 years Prof. Dr. Jürgen Becker - in preparation

21. Global, Regional, and National Levels and Trends in Burden of Oral Conditions from 1990 to 2017: A Systematic Analysis for the Global Burden of Disease 2017 Study

22. Glauser et al. Early bone formation around immediately placed 2-piece tissue-level zirconia implants with a modified surface. An experimental study in the miniature pig mandible. Poster at AO annual meeting 2022.

23.  Rauch N, et al. Two-piece zirconia implants in posterior regions: a prospective cohort study with a follow-up period of 9 years.