About the Authors

Marco Roy

metalmark@hotmail.it

Affiliation Prosthodontic Department, Poznan University of Medical Science, Poznan, Poland

Alfonso Pompella

Affiliation Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa Medical School, Pisa, Italy

Jerzy Kubacki

Affiliations A. Chelkowski Institute of Physics, University of Silesia, Katowice, Poland, Silesian Center for Education and Interdisciplinary Research, Chorzów, Poland

Jacek Szade

Affiliations A. Chelkowski Institute of Physics, University of Silesia, Katowice, Poland, Silesian Center for Education and Interdisciplinary Research, Chorzów, Poland

Robert A. Roy

Affiliation Private Practice, Pisa, Italy

Wieslaw Hedzelek

Affiliation Prosthodontic Department, Poznan University of Medical Science, Poznan, Poland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MR RAR AP JK. Performed the experiments: MR JK JS RAR. Analyzed the data: MR AP JK RAR WH. Contributed reagents/materials/analysis tools: MR JK JS. Wrote the paper: MR AP JK JS RAR WH.