Bio - materials (or dental materials) Instruments And Materials For Operative Dentistry And Their Influence On Mr-Images M.A. Baumann*, P. Theissen (1) And M. Schmidt (Dental School And Department Of Nuclear Medicine (1), University Of Cologne, 50931 Köln - Germany)   Tooth Separation And Proximal Contact Strengths Of Posterior Composite Restorations C. E. Dörfer*, P. Macke, H. J. Staehle (Poliklinik Für Zahnerhaltungskunde, Universitätsklinikum Heidelberg)   Presentation Of The Results Of A New Method Of Polymerization F. Duret* And B. Pelissier (UFR D'odontologie Montpellier I, France)   High Resolution Microtomography Applications In The Study Of Materials In Restorative Dentistry M. Frascaria*, M. Baldi, M. Giannoni, E. Buelens** (Univ. Studi L’Aquila, Dip. Scienze Chirurgiche, Clinica Odontostom.: Dir. Prof. M. Giannoni** SkyScan, Belgium)   Contact Allergy To Dental Materials In Patients With Early Onset Periodontitis B. Sigusch , A. Leister*, P. Hoffmann, A. Pfitzner, E. Glockmann (Dept. Of Conserv. Dentistry, Univ. Of Jena, Germany)   Influence Of Photopolymerization And Stratification On Immediate Hardness Of Three Dental Materials B. Pelissier*, P. Tramini, E. Castany And F. Duret (UFR d'Odontologie Montpellier I, France)   Root Caries Inhibition By Different Fluoride Varnishes In Vitro U. Schiffner* (Department Of Conservative And Preventive Dentistry, University Of Hamburg, Germany)   Inflammatory Markers Evoked By Resin Based Dental Materials - An In Vitro Study B. Willershausen* (1), B. Briseno Marroquin (1), D. Schäfer (2) (1: Johannes Gutenberg University Mainz, Department of Conservative Dentistry; 2: Department of Otorhinololaryngology)