1. Teaching Assistant, Prosthetic Department, Oral Rehabilitation Clinic; Poznan University of Medical Sciences; Poznan Poland
2. Teaching Assistant, Department of Conservative Dentistry; Poznan University of Medical Sciences; Poznan Poland
3. Research Engineer, Oral Rehabilitation Clinic Research Unit; Poznan University of Medical Sciences; Poznan Poland
4. Associate Professor, Prosthetic Department, Oral Rehabilitation Clinic; Poznan University of Medical Sciences; Poznan Poland
5. Associate Professor, Division of Restorative Science and Prosthodontics; College of Dentistry; The Ohio State University; Columbus OH