Please login first
Ella Naumova   Dr.  University Educator/Researcher 
Timeline See timeline
Ella Naumova published an article in September 2018.
Research Keywords & Expertise
0 A
0 Cement
0 Dental Materials
Top co-authors See all
Wolfgang H. Arnold

24 shared publications

Universität Witten/Herdecke, Lehrstuhl für Biologische und Materialkundliche Grundlagen der Zahnmedizin, D-58448 Witten, Germany

Andree Piwowarczyk

9 shared publications

Department of Prosthodontics and Dental Technology, School of Dentistry, Faculty of Health, Witten/Herdecke University, Alfred-Herrhausen-Strasse 44, 58455 Witten, Germany

Katharina Schaper

9 shared publications

Institute for Medical Biometry and Epidemiology, University of Witten/Herdecke, Witten, Germany

Christine Baulig

8 shared publications

Institute for Medical Biometry and Epidemiology, Witten/Herdecke University, Alfred-Herrhausen-Strasse 50, 58455 Witten, Germany

Berit Geis

3 shared publications

Institute for Medical Biometry and Epidemiology, Witten/Herdecke University, Alfred-Herrhausen-Strasse 50, 58455 Witten, Germany

Publication Record
Distribution of Articles published per year 
(2008 - 2018)
Total number of journals
published in
Publications See all
Article 2 Reads 0 Citations Influence of Luting Materials on the Retention of Cemented Implant-Supported Crowns: An In Vitro Study Ella A. Naumova, Felix Roth, Berit Geis, Christine Baulig, W... Published: 28 September 2018
Materials, doi: 10.3390/ma11101853
DOI See at publisher website ABS Show/hide abstract
The retention force of cemented crowns on implant abutments with various luting materials was evaluated. Cobalt–chromium crowns were cemented onto tapered titanium abutments (Camlog) with eugenol-free temporary cement (RelyX TempBond NE), composite-based temporary cement (Bifix Temp), zinc phosphate cement (Harvard Cement), glass-ionomer cements (Meron, Fuji I), and resin-modified glass-ionomer cements (Fuji II, Fuji Plus, Ketac Cem Plus). Specimen aging via hydrostress was performed in artificial saliva at 37 °C for 14 days (S1), followed by hydrothermal stress with thermocycling (S2). The crowns were removed, and the force was recorded (T1). Subsequently, the crowns were recemented, aged, and removed, and the force was recorded (T2, T3). The retention forces differences were statistically significant according to the storage conditions at T1 (p = 0.002) and T3 (p = 0.0002). After aging (S1), Ketac Cem Plus had the highest retention force median value difference (T3 versus T1) (−773 N), whereas RelyX TempBond NE had the lowest (−146 N). After aging (S2), Meron had the highest retention force median value difference (−783 N), whereas RelyX TempBond NE had the lowest (−168 N). Recementation decreased the retention force of the implant-supported cobalt–chromium crowns cemented and recemented with the same luting materials. Luting materials (at T1) and aging conditions significantly impacted the retention force.
Article 2 Reads 0 Citations Marginal quality of ceramic inlays after three different instrumental cavity preparation methods of the proximal boxes Ella A. Naumova, Fabian Schiml, Wolfgang H. Arnold, Andree P... Published: 04 June 2018
Clinical Oral Investigations, doi: 10.1007/s00784-018-2492-0
DOI See at publisher website ABS Show/hide abstract
The marginal quality of ceramic inlays was evaluated after the use of three different instrumental finishing methods in mesio-occluso-distal (mod) cavity boxes in vitro after hydrothermal loading (HTL). Caries-free human molars were divided into three groups. Mod-cavities were conventionally prepared. Box finishing was performed in every group with rotating (RI), sonic (SI), or ultrasonic (USI) instruments. Surface roughness was examined. Twelve mod-cavities remained untreated. Continuous margin quality was evaluated with scanning electron microscopy (SEM). Ceramic inlays were cemented into cavities. After HTL microleakage, marginal and absolute marginal gaps were examined. All data were analyzed statistically. Significant differences were found, between cavity surface roughness of RI and SI groups, the RI and USI groups, but not between microleakage, marginal, absolute marginal gaps after HTL and in proximal marginal quality. No correlations between microleakage and marginal gaps nor between microleakage and surface roughness were found. Mod-cavity proximal box finishing with SI or USI resulted in a higher surface roughness than the use of RI. The type of the finishing method did not influence the marginal quality of ceramic inlays. For the mod-cavity finishing, the use of SI and USI could be an alternative instrumental method to conventional RI methods with a lower risk of iatrogenic damage of the adjacent teeth. This study allows the practitioner to better determine the proper indications and limitations of the sonic and ultrasonic instruments for mod-cavity proximal box finishing.
Article 3 Reads 1 Citation Wear Behavior of Ceramic CAD/CAM Crowns and Natural Antagonists Ella A. Naumova, Stephan Schneider, Wolfgang H. Arnold, Andr... Published: 28 February 2017
Materials, doi: 10.3390/ma10030244
DOI See at publisher website ABS Show/hide abstract
Objective: Evaluation of wear behavior of computer-aided design/computer-aided manufacturing (CAD/CAM) crowns from various restorative materials and natural antagonists. Method: Full CAD/CAM crowns fabricated with nanoceramic resin (Lava Ultimate (LU)), a glass ceramic in a resin interpenetrating matrix (Vita Enamic (VE)) and a lithium silicate reinforced ceramic enriched with zirconia (Vita Suprinity (VS)) were cemented on human molars. The crown and antagonists were subjected to simulated chewing. 3D data sets, before and after the chewing simulation, were generated and matched. Occlusal surface roughness, vertical and volume loss of the crowns and antagonists were analyzed. Results: Crown roughness was significantly different between the LU and VE groups after chewing simulation. Crown vertical loss differed in all groups. The highest crown volume loss was found in the LU group, and the lowest in the VE group. Comparisons between the LU and VE groups and the LU and VS groups were significantly different. The highest antagonist volume loss was reached in the VE group, the lowest was in the LU group. Conclusion: Roughness increased after chewing simulation. LU crowns are the most natural antagonist-friendly; these were the most susceptible to vertical and volume loss. Of the tested materials, the VE crowns are the most stable regarding occlusion.
Article 0 Reads 2 Citations Dynamics of Fluoride Bioavailability in the Biofilms of Different Oral Surfaces after Amine Fluoride and Sodium Fluoride... Ella A. Naumova, Christoph Dickten, Rico Jung, Florian Kraus... Published: 05 January 2016
Scientific Reports, doi: 10.1038/srep18729
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
It was the aim of this study to investigate differences in fluoride bioavailability in different oral areas after the application of amine fluoride (AmF) and sodium fluoride (NaF). The null hypothesis suggested no differences in the fluoride bioavailability. The tongue coating was removed and biofilm samples from the palate, oral floor and cheeks were collected. All subjects brushed their teeth with toothpaste containing AmF or NaF. Specimens were collected before, as well as immediately after and at 30 and 120 minutes after tooth brushing. The fluoride concentration was determined. The area under the curve was calculated for each location and compared statistically. In the tongue coating, fluoride concentration increased faster after NaF application than after AmF application. After 30 minutes, the fluoride concentration decreased and remained stable until 120 minutes after AmF application and returned to baseline after NaF application. The difference between the baseline and the endpoint measurements was statistically significant. The fluoride concentration in the tongue coating remained at a higher level compared with the baseline for up to 120 minutes post-brushing. This may indicate that the tongue coating is a major reservoir for fluoride bioavailability. The results also indicate an unequal fluoride distribution in the oral cavity.
Article 0 Reads 0 Citations Adhesion of different resin cements to enamel and dentin Ella A. Naumova, Saskia Ernst, Katharina Schaper, Wolfgang H... Published: 01 January 2016
Dental Materials Journal, doi: 10.4012/dmj.2015-174
DOI See at publisher website PubMed View at PubMed
Article 3 Reads 0 Citations Microleakage of Different Self-Adhesive Materials for Lithium Disilicate CAD/CAM Crowns Ella A. Naumova, Alexander Valta, Katharina Schaper, Wolfgan... Published: 03 June 2015
Materials, doi: 10.3390/ma8063238
DOI See at publisher website ABS Show/hide abstract
Objectives: To evaluate the microleakage and marginal gap of various luting materials after cementing ceramic crowns. Methods: Cervical margins of human molars were designed as circular chamfers. Cementation of full-contour ceramic crowns was conducted with zinc-phosphate cement (Harvard cement), resin cement (Panavia F 2.0) and self-adhesive resin cements (RelyX Unicem, BifixSE, MaxCem Elite, PermaCem2.0, G-Cem). Aging of specimens was performed in artificial saliva, at 37 °C for four weeks and thermocycling. The marginal gap was measured with a scanning electron microscope and silver precipitation within the microleakage. All data were compared statistically. Results: Independent of the margin preparation, the highest median value for microleakage was 320.2 μm (Harvard cement), and the lowest was 0 μm (Panavia F 2.0). The median value for enamel was 0 µm and for dentin 270.9 μm (p < 0.001), which was independent of the luting material. The marginal and absolute marginal gaps were not significantly different between the tested materials. There was no correlation between microleakage and the marginal gaps. Conclusion: Significant differences in microleakage were found between the tested luting materials (p < 0.05). Independent from the luting materials, the microleakage in dentin showed significantly higher values than in enamel.