1 Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Turku, Finland. Electronic address: mona.f.gibreel@utu.fi.
2 Department of Removable Prosthodontics, Faculty of Dentistry, Mansoura University, Egypt.
3 Department of Prosthetic Dentistry and Stomatognathic Physiology, University of Turku, Turku, Finland; Department of Oral Diseases, Turku University Hospital, Turku, Finland.
4 Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Turku, Finland.
5 Department of Biomaterials Science and Turku Clinical Biomaterials Centre-TCBC, Institute of Dentistry, University of Turku, Turku, Finland; Welfare Division, City of Turku, Turku, Finland.