About the Authors

Inga Harks

Contributed equally to this work with: Inga Harks, Yvonne Jockel-Schneider

Affiliation Department of Periodontology, University Hospital Muenster, Muenster, Germany

Yvonne Jockel-Schneider

Contributed equally to this work with: Inga Harks, Yvonne Jockel-Schneider

Affiliation Department of Periodontology, University Hospital Wuerzburg, Wuerzburg, Germany

Ulrich Schlagenhauf

Affiliation Department of Periodontology, University Hospital Wuerzburg, Wuerzburg, Germany

Theodor W. May

Affiliation Society for Biometry and Psychometry, Bielefeld, Germany

Martina Gravemeier

Affiliation Department of Periodontology, University Hospital Muenster, Muenster, Germany

Karola Prior

Affiliation Department of Periodontology, University Hospital Muenster, Muenster, Germany

Gregor Petersilka

Affiliations Department of Periodontology, University Hospital Muenster, Muenster, Germany, Private Practice, Wuerzburg, Germany

Benjamin Ehmke

ehmke@uni-muenster.de

Affiliation Department of Periodontology, University Hospital Muenster, Muenster, Germany

Competing Interests

All study affairs have been exclusively funded by Dr. Kurt Wolff GmbH & CO. KG, Johanneswerkstr. 34 – 36, 33611 Bielefeld, Germany. There are no patents, products in development, or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: BE IH US YJ-S GP. Performed the experiments: IH YJ-S. Analyzed the data: TWM. Contributed reagents/materials/analysis tools: MG KP. Wrote the paper: IH YJ-S US BE GP. Managed the trial: IH YJ-S MG. Performed the microbiological analyses: KP.