@article{MTMT:30710457, title = {Fracture resistance and marginal gap formation of post-core restorations: influence of different fiber-reinforced composites}, url = {https://m2.mtmt.hu/api/publication/30710457}, author = {Fráter, Márk Tibor and Lassila, Lippo and Braunitzer, Gábor and Vallittu, Pekka K. and Garoushi, Sufyan}, doi = {10.1007/s00784-019-02902-3}, journal-iso = {CLIN ORAL INVEST}, journal = {CLINICAL ORAL INVESTIGATIONS}, volume = {24}, unique-id = {30710457}, issn = {1432-6981}, keywords = {Short-fiber composites; Dentistry, Oral Surgery & Medicine; microgap}, year = {2020}, eissn = {1436-3771}, pages = {265-276}, orcid-numbers = {Fráter, Márk Tibor/0000-0002-0365-1613; Braunitzer, Gábor/0000-0001-8983-5175} } @article{MTMT:30332292, title = {Effect of exposure time and pre-heating on the conversion degree of conventional, bulk-fill, fiber reinforced and polyacid-modified resin composites}, url = {https://m2.mtmt.hu/api/publication/30332292}, author = {Lempel, Edina and Őri, Zsuzsanna Emese and Szalma, József and Lovász, Bálint Viktor and Szilyné Kiss, Adél and Tóth, Ákos and Kunsági-Máté, Sándor}, doi = {10.1016/j.dental.2018.11.017}, journal-iso = {DENT MATER}, journal = {DENTAL MATERIALS}, volume = {35}, unique-id = {30332292}, issn = {0109-5641}, abstract = {To determine the degree of conversion (DC) of different type of resin-based composites (RBC) in eight-millimeter-deep clinically relevant molds, and investigate the influence of exposure time and pre-heating on DC.Two-millimeter-thick samples of conventional sculptable [FiltekZ250 (FZ)], flowable [Filtek Ultimate Flow (FUF)] and polyacid-modified [Twinky Star Flow (TS)] RBCs, and four-millimeter-thick samples of flowable bulk-fill [Filtek Bulk Fill Flow (FBF), Surefil SDR (SDR)] and sculptable fibre-reinforced [EverX Posterior (EX)] RBCs were prepared in an eight-millimeter-deep mold. The RBCs temperature was pre-set to 25, 35 and 55°C. The RBCs were photopolymerized with the recommended and its double exposure time. The DC at the top and bottom was measured with micro-Raman spectroscopy. Data were analyzed with ANOVA and Scheffe post-hoc test (p<0.05).The differences in DC% between the top/bottom and the recommended/extended exposure time were significant for the materials, except SDR (64.5/63.0% and 67.4/63.0%). FUF (69.0% and 53.4%) and TS (64.9% and 60.9%) in 2mm provided higher DC% at the top and bottom with the recommended curing time, compared to the other materials, except SDR. Pre-heating had negative effect on DC at the bottom in flowable RBCs (FUF: 48.9%, FBF: 36.7%, SDR: 43%, TS: 54.7%). Pre-heating to 55 °C significantly increased the DC% in fibre-reinforced RBC (75.0% at the top, 64.7% at the bottom).Increased exposure time improves the DC for each material. Among bulk-fills, only SDR performed similarly, compared to the two-millimeter-thick flowable RBCs. Pre-heating of low-viscosity RBCs decreased the DC% at the bottom. Pre-heating of fibre-reinforced RBC to 55°C increased the DC% at a higher rate than the extended curing time.}, keywords = {Degree of conversion; Exposure time; Pre-heating; Resin based composite}, year = {2019}, eissn = {1879-0097}, pages = {217-228}, orcid-numbers = {Szalma, József/0000-0002-6006-8758; Szilyné Kiss, Adél/0000-0003-2270-4538} } @article{MTMT:3174180, title = {In vitro fracture resistance of endodontically treated premolar teeth restored with a direct layered fiber-reinforced composite post and core}, url = {https://m2.mtmt.hu/api/publication/3174180}, author = {Forster, András and Sáry, Tekla and Braunitzer, Gábor and Fráter, Márk Tibor}, doi = {10.1080/01694243.2016.1259758}, journal-iso = {J ADHES SCI TECHNOL}, journal = {JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY}, volume = {31}, unique-id = {3174180}, issn = {0169-4243}, abstract = {Methods for restoring endodontically treated teeth fall short of restoring the physiologic mechanical properties. Fracture of endodontically treated teeth is a common type of clinical failure. New treatment modalities or perfected versions of existing treatment concepts need to be tested to find a biomimetic solution. A novel method of restoring endodontically treated teeth is presented and compared in vitro with currently accepted restorative methods. Seventy-two extracted and endodontically treated maxillary premolar teeth were divided into six groups (n = 12) depending on restorative technique (Groups 1–6). Group 1: fiber-reinforced composite post (FRC), Group 2: direct layered short FRC post and core, Group 3: short fiber-reinforced obliquely layered composite restoration, Group 4: microhybrid composite restoration, Group 5: fiber-reinforced box, Group 6: control. Specimens were submitted to static fracture resistance test. Fracture thresholds and fracture patterns were evaluated. Group 6 exhibited the highest fracture resistance. Group 2 yielded the highest fracture resistance among the restored groups. The fracture resistance of Group 2 did not differ significantly from Group 6. Groups 1, 3, 4, 5 proved to be significantly different from the control group. There was no statistically significant difference among restored groups. Fracture patterns of tested groups were dominantly non repairable opposed to control groups mostly repairable fractures. Application of direct-layered short FRC post and core in endodontically treated premolars performed statistically similarly in the studied conditions as natural teeth. Therefore, it seems a promising alternative to current endo-restorative solutions. However, further testing is required. © 2016 Informa UK Limited, trading as Taylor & Francis Group}, keywords = {FIBERS; RESTORATION; FRACTURE; fracture toughness; REINFORCEMENT; Biomimetics; biomimetic; Layered composites; Fiber reinforced; Statistically significant difference; Laser tissue interaction; fiber reinforced plastics; Treatment modality; Fiber reinforced composites; Composite restorations; Clinical failure; monoblock; minimal intervention dentistry; Fiber-reinforced composite}, year = {2017}, eissn = {1568-5616}, pages = {1454-1466}, orcid-numbers = {Forster, András/0000-0002-3495-7105; Braunitzer, Gábor/0000-0001-8983-5175; Fráter, Márk Tibor/0000-0002-0365-1613} } @article{MTMT:3069659, title = {In vitro fracture resistance of premolar teeth restored with fibre-reinforced composite posts using a single or a multi-post technique}, url = {https://m2.mtmt.hu/api/publication/3069659}, author = {Fráter, Márk Tibor and Forster, András and Jantyik, A and Braunitzer, Gábor and Nagy, Katalin and Grandini, S}, doi = {10.1111/aej.12150}, journal-iso = {AUST ENDOD J}, journal = {AUSTRALIAN ENDODONTIC JOURNAL}, volume = {43}, unique-id = {3069659}, issn = {1329-1947}, abstract = {The purpose of this study was to evaluate the reinforcing effect of fibre-reinforced composites (FRC) applied in premolar teeth with different techniques and minimally invasive post space preparation. Fifty extracted and endodontically treated premolar teeth were used. The teeth were divided into five groups (n = 10) depending on the restorative technique (Groups 1-5). Group 1: one single conventional post, Group 2: one main conventional and one collateral post, Group 3: one elastic post, Group 4: one main elastic and one collateral post, and Group 5: individual post formed of elastic posts. After cementation and core build-up, the specimens were submitted to static fracture resistance test. Fracture thresholds and fracture patterns were measured and evaluated. Group 4 showed the highest average fracture resistance among the tested groups. The multi-post techniques (group 2 and 4) exhibited statistically higher fracture resistance compared to group 1. Regarding fracture patterns, there was no statistically significant difference between the tested groups. Within the limitations of this study, the application of multiple elastic or conventional FRC posts or a single elastic post in the same root canal is beneficial in terms of fracture resistance compared to a single conventional FRC post. The elasticity or the number of posts did not influence the fracture patterns.}, keywords = {Bicuspid; Dentistry, Oral Surgery & Medicine}, year = {2017}, eissn = {1747-4477}, pages = {16-22}, orcid-numbers = {Fráter, Márk Tibor/0000-0002-0365-1613; Forster, András/0000-0002-3495-7105; Braunitzer, Gábor/0000-0001-8983-5175; Nagy, Katalin/0000-0001-9383-5952} }