Wassmann, Torsten

[["dc.bibliographiccitation.issue","32"],["dc.bibliographiccitation.journal","International Journal of Implant Dentistry"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Kreis, Stefan"],["dc.contributor.author","Behr, Michael"],["dc.contributor.author","Buergers, Ralf"],["dc.date.accessioned","2019-07-09T11:44:25Z"],["dc.date.available","2019-07-09T11:44:25Z"],["dc.date.issued","2017"],["dc.description.abstract","This study aims to investigate bacterial adhesion on different titanium and ceramic implant surfaces, to correlate these findings with surface roughness and surface hydrophobicity, and to define the predominant factor for bacterial adhesion for each material. Zirconia and titanium specimens with different surface textures and wettability (5.0 mm in diameter, 1.0 mm in height) were prepared. Surface roughness was measured by perthometer (R a ) and atomic force microscopy, and hydrophobicity according to contact angles by computerized image analysis. Bacterial suspensions of Streptococcus sanguinis and Staphylococcus epidermidis were incubated for 2 h at 37 °C with ten test specimens for each material group and quantified with fluorescence dye CytoX-Violet and an automated multi-detection reader. Variations in surface roughness (R a ) did not lead to any differences in adhering S. epidermidis, but higher R a resulted in increased S. sanguinis adhesion. In contrast, higher bacterial adhesion was observed on hydrophobic surfaces than on hydrophilic surfaces for S. epidermidis but not for S. sanguinis. The potential to adhere S. sanguinis was significantly higher on ceramic surfaces than on titanium surfaces; no such preference could be found for S. epidermidis. Both surface roughness and wettability may influence the adhesion properties of bacteria on biomaterials; in this context, the predominant factor is dependent on the bacterial species. Wettability was the predominant factor for S. epidermidis and surface texture for S. sanguinis. Zirconia did not show any lower bacterial colonization potential than titanium. Arithmetical mean roughness values R a (measured by stylus profilometer) are inadequate for describing surface roughness with regard to its potential influence on microbial adhesion."],["dc.identifier.doi","10.1186/s40729-017-0093-3"],["dc.identifier.pmid","28714053"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14756"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59009"],["dc.notes.intern","Merged from goescholar"],["dc.notes.intern","In goescholar not merged with http://resolver.sub.uni-goettingen.de/purl?gs-1/15179 but duplicate"],["dc.rights","CC BY 4.0"],["dc.rights.access","openAccess"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","The influence of surface texture and wettability on initial bacterial adhesion on titanium and zirconium oxide dental implants"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","e669"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","European Journal of Dental Education"],["dc.bibliographiccitation.lastpage","e678"],["dc.bibliographiccitation.volume","22"],["dc.contributor.author","Kanzow, Philipp"],["dc.contributor.author","Schuelper, Nikolai"],["dc.contributor.author","Witt, Daniela"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Sennhenn-Kirchner, Sabine"],["dc.contributor.author","Wiegand, Annette"],["dc.contributor.author","Raupach, Tobias"],["dc.date.accessioned","2020-05-22T07:21:30Z"],["dc.date.available","2020-05-22T07:21:30Z"],["dc.date.issued","2018-06-22"],["dc.description.abstract","Introduction: Various scoring approaches for Multiple True-False (MTF) items exist. This study aimed at comparing scoring results obtained with different scoring approaches and to assess the effect of item cues on each scoring approaches' result.\r\nMaterials and methods: Different scoring approaches (MTF, Count-2, Count-3, \"Vorkauf-Method,\" PS50 , Dichotomized MTF, \"Blasberg-Method,\" Multiple response (MR), Correction for Guessing, \"Ripkey-Method,\" Morgan-Method, Balanced Scoring Method) were retrospectively applied to all MTF items used within electronic examinations of undergraduate dental students at the University Medical Center Göttingen in the winter term 2016/2017 (1297 marking events). Item quality was evaluated regarding formal parameters such as presence of cues and correctness of content. Differences between scoring results of all scoring approaches and the differences between each methods' scoring results of items with and without cues were calculated by Wilcoxon rank sum tests (P < .05).\r\nResults: Average scoring results per item highly differed between the scoring approaches and ranged from 0.46 (MR) to 0.92 (Dichotomized MTF). Presence of cues leads to significantly higher scoring in case of all scoring approaches (P < .001; +0.14 on average). However, effect of cues differed amongst scoring approaches and ranged from +0.04 (Dichotomized MTF) to +0.20 (MR).\r\nConclusion: Scoring of MTF items is complex. The data presented in this manuscript may help educators make informed choices about scoring algorithms."],["dc.identifier.doi","10.1111/eje.12372"],["dc.identifier.pmid","29934980"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65686"],["dc.language.iso","en"],["dc.relation.issn","1396-5883"],["dc.relation.orgunit","Poliklinik für Präventive Zahnmedizin, Parodontologie und Kariologie"],["dc.relation.orgunit","Klinik für Mund-, Kiefer- und Gesichtschirurgie"],["dc.relation.orgunit","Poliklinik für Kieferorthopädie"],["dc.relation.orgunit","Poliklinik für Zahnärztliche Prothetik"],["dc.relation.orgunit","Klinik für Kardiologie und Pneumologie"],["dc.subject.gro","Kprim"],["dc.subject.gro","K’"],["dc.subject.gro","Multiple True-False"],["dc.subject.gro","Type X"],["dc.subject.gro","k of n"],["dc.subject.gro","scoring"],["dc.title","Effect of different scoring approaches upon credit assignment when using Multiple True-False items in dental undergraduate examinations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","206"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Prosthetic Dentistry"],["dc.bibliographiccitation.lastpage","209"],["dc.bibliographiccitation.volume","119"],["dc.contributor.author","Krohn, Sebastian"],["dc.contributor.author","Frahm, Jens"],["dc.contributor.author","Merboldt, Klaus-Dietmar"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Joseph, Arun A."],["dc.contributor.author","Bürgers, Ralf"],["dc.date.accessioned","2021-06-01T10:49:53Z"],["dc.date.available","2021-06-01T10:49:53Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1016/j.prosdent.2017.03.022"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/86447"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.issn","0022-3913"],["dc.title","Diagnosis of disk displacement using real-time MRI: Clinical report of two patients"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Clinical Oral Investigations"],["dc.contributor.author","Rinke, Sven"],["dc.contributor.author","Zuck, Tanja"],["dc.contributor.author","Hausdörfer, Tim"],["dc.contributor.author","Leha, Andreas"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Ziebolz, Dirk"],["dc.date.accessioned","2021-09-01T06:42:27Z"],["dc.date.available","2021-09-01T06:42:27Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract Objectives A university-based randomized clinical study evaluated the 5-year performance of chairside-fabricated zirconia-reinforced lithium silicate (ZLS)-ceramic partial crowns. Material and methods Forty-five patients were restored with 61 chairside-fabricated ZLS-restorations (Cerec SW 4.2, Dentsply Sirona, Germany; Vita Suprinity, Vita Zahnfabrik, Germany). Deviating from the manufacturers’ recommendations, restorations with reduced minimum material thicknesses (MMT) were fabricated: group 1, MMT = 0.5–0.74 mm ( n  = 31); group 2, MMT = 0.75–1.0 mm ( n  = 30). For luting, a self-adhesive cement (SAC) or a total-etch technique with a composite cement (TEC) was applied. Statistical evaluation was performed by time-to-event analysis (Kaplan–Meier). Possible covariates of the survival (SVR) and success rates (SCR), evaluated in a Cox regression model, were MMT, restoration position (premolar/molar), and cementation technique (SAC vs. TEC). Results Forty patients (54 restorations, premolars, n  = 23; molars, n  = 31) participated in the 5-year follow-up. Five losses due to ceramic fractures occurred in group 1 ( n  = 28) (SVR: 83.0% [95% confidence interval (CI): 0.71–0.96]). Group 2 ( n  = 26) showed no losses (SVR: 100%). The success rate for partial crowns placed on premolars was 100% and 69% (95% CI: 0.54–0.84) for molar restorations. Recementation was required in 4 restorations with SAC (SCR: 86% [95% CI: 0.73–0.99]; SCR-DC: 100%). Restorations in group 2 showed a significantly reduced risk of material fracture hazard ratio (HR) = 0.09, p  = 0.0292) compared with the restorations in group 1. Molar partial crowns showed an increased risk for a clinical intervention (HR = 5.26, p  = 0.0222) compared to premolar restorations. Conclusions Material thickness and position of the restoration are risk factors influencing the survival and success rate of ZLS-ceramic partial crowns. Clinical relevance Observation of an MMT of at least 0.75–1.0 mm for ZLS-ceramics is essential to avoid material-related fractures. Clinical trial registration : German Clinical Trails Register (trial number: DRKS00005611)"],["dc.description.abstract","Abstract Objectives A university-based randomized clinical study evaluated the 5-year performance of chairside-fabricated zirconia-reinforced lithium silicate (ZLS)-ceramic partial crowns. Material and methods Forty-five patients were restored with 61 chairside-fabricated ZLS-restorations (Cerec SW 4.2, Dentsply Sirona, Germany; Vita Suprinity, Vita Zahnfabrik, Germany). Deviating from the manufacturers’ recommendations, restorations with reduced minimum material thicknesses (MMT) were fabricated: group 1, MMT = 0.5–0.74 mm ( n  = 31); group 2, MMT = 0.75–1.0 mm ( n  = 30). For luting, a self-adhesive cement (SAC) or a total-etch technique with a composite cement (TEC) was applied. Statistical evaluation was performed by time-to-event analysis (Kaplan–Meier). Possible covariates of the survival (SVR) and success rates (SCR), evaluated in a Cox regression model, were MMT, restoration position (premolar/molar), and cementation technique (SAC vs. TEC). Results Forty patients (54 restorations, premolars, n  = 23; molars, n  = 31) participated in the 5-year follow-up. Five losses due to ceramic fractures occurred in group 1 ( n  = 28) (SVR: 83.0% [95% confidence interval (CI): 0.71–0.96]). Group 2 ( n  = 26) showed no losses (SVR: 100%). The success rate for partial crowns placed on premolars was 100% and 69% (95% CI: 0.54–0.84) for molar restorations. Recementation was required in 4 restorations with SAC (SCR: 86% [95% CI: 0.73–0.99]; SCR-DC: 100%). Restorations in group 2 showed a significantly reduced risk of material fracture hazard ratio (HR) = 0.09, p  = 0.0292) compared with the restorations in group 1. Molar partial crowns showed an increased risk for a clinical intervention (HR = 5.26, p  = 0.0222) compared to premolar restorations. Conclusions Material thickness and position of the restoration are risk factors influencing the survival and success rate of ZLS-ceramic partial crowns. Clinical relevance Observation of an MMT of at least 0.75–1.0 mm for ZLS-ceramics is essential to avoid material-related fractures. Clinical trial registration : German Clinical Trails Register (trial number: DRKS00005611)"],["dc.identifier.doi","10.1007/s00784-021-04132-y"],["dc.identifier.pii","4132"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/89055"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-455"],["dc.relation.eissn","1436-3771"],["dc.relation.issn","1432-6981"],["dc.title","Prospective clinical evaluation of chairside-fabricated zirconia-reinforced lithium silicate ceramic partial crowns—5-year results"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2225"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","European Journal of Radiology"],["dc.bibliographiccitation.lastpage","2230"],["dc.bibliographiccitation.volume","85"],["dc.contributor.author","Krohn, Sebastian"],["dc.contributor.author","Gersdorff, Nikolaus"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Merboldt, Klaus-Dietmar"],["dc.contributor.author","Joseph, Arun A."],["dc.contributor.author","Buergers, Ralf"],["dc.contributor.author","Frahm, Jens"],["dc.date.accessioned","2018-11-07T10:05:09Z"],["dc.date.available","2018-11-07T10:05:09Z"],["dc.date.issued","2016"],["dc.description.abstract","The purpose of this study was to develop and evaluate a novel method for real-time MRI of TMJ function at high temporal resolution and with two different contrasts. Real-time MRI was based on undersampled radial fast low angle shot (FLASH) acquisitions with iterative image reconstruction by regularized nonlinear inversion. Real-time MRI movies with T1 contrast were obtained with use of a radiofrequency-spoiled FLASH sequence, while movies with T2/T1 contrast employed a gradient-refocused FLASH version. TMJ function was characterized in 40 randomly selected volunteers by sequential 20 s acquisitions of both the right and left joint during voluntary opening and closing of the mouth (in a medial, central and lateral oblique sagittal section perpendicular to the long axis of the condylar head). All studies were performed on a commercial MRI system at 3 T using the standard head coil, while online reconstruction was achieved with a bypass computer fully integrated into the MRI system. As a first result, real-time MRI studies of the right and left TMJ were successfully performed in all 40 subjects (80 joints) within a total examination time per subject of only 15 min. Secondly, at an in-plane resolution of 0.75 mm and 5 mm section thickness, the achieved temporal resolution was 66.7 ms per image or 15 frames per second. Thirdly, both T1-weighted and T2/T1-weighted real-time MRI movies provided information about TMJ function such as disc position, condyle mobility and disc-condyle relationship. While T1 contrast offers a better delineation of structures during rapid jaw movements, T2/T1 contrast was rated superior for characterizing the articular disc. In conclusion, the proposed real-time MRI method may become a robust and efficient tool for the clinical assessment of TMJ function. (C) 2016 Elsevier Ireland Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.ejrad.2016.10.020"],["dc.identifier.isi","000389511400011"],["dc.identifier.pmid","27842671"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38846"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Ireland Ltd"],["dc.relation.issn","1872-7727"],["dc.relation.issn","0720-048X"],["dc.title","Real-time MRI of the temporomandibular joint at 15 frames per second-A feasibility study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3899"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Clinical Oral Investigations"],["dc.bibliographiccitation.lastpage","3909"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Schubert, Andrea"],["dc.contributor.author","Malinski, Felix"],["dc.contributor.author","Rosentritt, Martin"],["dc.contributor.author","Krohn, Sebastian"],["dc.contributor.author","Techmer, Kirsten"],["dc.contributor.author","Bürgers, Ralf"],["dc.date.accessioned","2020-12-10T14:11:05Z"],["dc.date.available","2020-12-10T14:11:05Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1007/s00784-020-03257-w"],["dc.identifier.eissn","1436-3771"],["dc.identifier.issn","1432-6981"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/70959"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","The antimicrobial and cytotoxic effects of a copper-loaded zinc oxide phosphate cement"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","343"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Oral Science"],["dc.bibliographiccitation.lastpage","350"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Kanzow, Philipp"],["dc.contributor.author","Baxter, Steffi"],["dc.contributor.author","Rizk, Marta"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Wiegand, Annette E."],["dc.date.accessioned","2019-07-09T11:51:57Z"],["dc.date.accessioned","2020-05-22T07:22:36Z"],["dc.date.available","2019-07-09T11:51:57Z"],["dc.date.available","2020-05-22T07:22:36Z"],["dc.date.issued","2019-06-18"],["dc.description.abstract","The study aimed to compare the repair bond strength of aged composite and amalgam repaired with resin composite after various mechanical and adhesive surface treatments. Specimens were aged by thermal cycling (10,000 cycles, 5-55°C) and randomly subjected to one of three surface treatments: diamond bur abrasion, aluminum oxide air abrasion, or silica coating. Conventional bonding or a universal adhesive with incorporated silane was applied afterward (each n = 16) and resin composite was attached. In the control groups (each n = 16), resin composite was attached using one of the above adhesives without prior mechanical surface conditioning. After further thermal cycling, the shear bond strength (SBS) and failure modes were assessed. Statistical analyses were performed using ANOVA, Weibull statistics, two sample t-tests, and Chi2-test (P < 0.05). The SBS of the repaired amalgam was significantly lower than that of the composite and mechanical pretreatment significantly increased SBS. The universal adhesive significantly improved the SBS of the repaired amalgam compared to the conventional bonding agent and mechanical pretreatment increased the number of cohesive/mixed failures. Amalgam restorations may be repaired using resin composites, but the resulting SBS is lower than that obtained with composite."],["dc.identifier.doi","10.2334/josnusd.18-0301"],["dc.identifier.pmid","31217385"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16247"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60050"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65687"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.eissn","1880-4926"],["dc.relation.issn","1343-4934"],["dc.relation.orgunit","Poliklinik für Präventive Zahnmedizin, Parodontologie und Kariologie"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","610"],["dc.subject.gro","amalgam"],["dc.subject.gro","composite"],["dc.subject.gro","dental restoration failure"],["dc.subject.gro","dental restoration repair"],["dc.subject.gro","shear bond strength"],["dc.title","Effectiveness of a universal adhesive for repair bonding to composite and amalgam"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","4580"],["dc.bibliographiccitation.issue","21"],["dc.bibliographiccitation.journal","Polymers"],["dc.bibliographiccitation.volume","14"],["dc.contributor.affiliation","Hampe, Tristan; 1Department of Prosthodontics, University Medical Center Göttingen, 37075 Göttingen, Germany"],["dc.contributor.affiliation","Liersch, Julia; 1Department of Prosthodontics, University Medical Center Göttingen, 37075 Göttingen, Germany"],["dc.contributor.affiliation","Wiechens, Bernhard; 1Department of Prosthodontics, University Medical Center Göttingen, 37075 Göttingen, Germany"],["dc.contributor.affiliation","Wassmann, Torsten; 1Department of Prosthodontics, University Medical Center Göttingen, 37075 Göttingen, Germany"],["dc.contributor.affiliation","Schubert, Andrea; 1Department of Prosthodontics, University Medical Center Göttingen, 37075 Göttingen, Germany"],["dc.contributor.affiliation","Alhussein, Mohammad; 3Molecular Phytopathology and Mycotoxin Research, University of Göttingen, 37077 Göttingen, Germany"],["dc.contributor.affiliation","Bürgers, Ralf; 1Department of Prosthodontics, University Medical Center Göttingen, 37075 Göttingen, Germany"],["dc.contributor.affiliation","Krohn, Sebastian; 1Department of Prosthodontics, University Medical Center Göttingen, 37075 Göttingen, Germany"],["dc.contributor.author","Hampe, Tristan"],["dc.contributor.author","Liersch, Julia"],["dc.contributor.author","Wiechens, Bernhard"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Schubert, Andrea"],["dc.contributor.author","Alhussein, Mohammad"],["dc.contributor.author","Bürgers, Ralf"],["dc.contributor.author","Krohn, Sebastian"],["dc.date.accessioned","2022-12-01T08:31:46Z"],["dc.date.available","2022-12-01T08:31:46Z"],["dc.date.issued","2022"],["dc.date.updated","2022-11-11T13:12:02Z"],["dc.description.abstract","This study aimed to investigate the release of common monomers from conventional (Dialog Vario, Enamel Plus HFO) and UDMA-based indirect veneering composites (VITA VM LC, GC Gradia). Ten cylindrical samples of each material were prepared (n = 40), immersed in HPLC grade water, and incubated for 24 h in an incubation shaker at 37 °C and 112 rpm. Extraction was performed following ISO 10993-12 and monomers were detected and quantified by HPLC-MS/MS. In all the samples, urethane dimethacrylate (UDMA) and bisphenol A (BPA) were quantifiable. Compared to water blanks, BPA levels were only elevated in the eluates from conventional composites. In all other samples, concentrations were in the range of extraneous BPA and were therefore clinically irrelevant. Low concentrations of Bisphenol A-glycidyl methacrylate (BisGMA) were found in one BPA-free composite and in both conventional materials. Statistical analyses showed that BPA-free materials released significantly less BisGMA and no BPA, while UDMA elution was comparable to elution from conventional materials. All measured concentrations were below reported effective cytotoxic concentrations. Considering these results, the substitution of BPA-derivatives with UDMA might be beneficial since BPA-associated adverse effects are ruled out. Further studies should be enrolled to test the biocompatibility of UDMA on cells of the oral environment."],["dc.description.sponsorship","German Society for Prosthodontics and Material Sciences (DGPro)"],["dc.description.sponsorship","Open-Access-Publikationsfonds 2022"],["dc.identifier.doi","10.3390/polym14214580"],["dc.identifier.pii","polym14214580"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/118262"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-621"],["dc.relation.eissn","2073-4360"],["dc.title","A Pilot Study on Monomer and Bisphenol A (BPA) Release from UDMA-Based and Conventional Indirect Veneering Composites"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","456"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Coatings"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Schubert, Andrea"],["dc.contributor.author","Wassmann, Torsten"],["dc.contributor.author","Holtappels, Mareike"],["dc.contributor.author","Kurbad, Oliver"],["dc.contributor.author","Krohn, Sebastian"],["dc.contributor.author","Bürgers, Ralf"],["dc.date.accessioned","2019-07-31T12:13:35Z"],["dc.date.available","2019-07-31T12:13:35Z"],["dc.date.issued","2019"],["dc.description.abstract","Microbial adhesion to intraoral biomaterials is associated with surface roughness. For the prevention of oral pathologies, smooth surfaces with little biofilm formation are required. Ideally, appropriate roughness parameters make microbial adhesion predictable. Although a multitude of parameters are available, surface roughness is commonly described by the arithmetical mean roughness value (Ra). The present study investigates whether Ra is the most appropriate roughness parameter in terms of prediction for microbial adhesion to dental biomaterials. After four surface roughness modifications using standardized polishing protocols, zirconia, polymethylmethacrylate, polyetheretherketone, and titanium alloy specimens were characterized by Ra as well as 17 other parameters using confocal microscopy. Specimens of the tested materials were colonized by C. albicans or S. sanguinis for 2 h; the adhesion was measured via luminescence assays and correlated with the roughness parameters. The adhesion of C. albicans showed a tendency to increase with increasing the surface roughness—the adhesion of S. sanguinis showed no such tendency. Although Sa, that is, the arithmetical mean deviation of surface roughness, and Rdc, that is, the profile section height between two material ratios, showed higher correlations with the microbial adhesion than Ra, these di erences were not significant. Within the limitations of this in-vitro study, we conclude that Ra is a su cient roughness parameter in terms of prediction for initial microbial adhesion to dental biomaterials with polished surfaces."],["dc.identifier.doi","10.3390/coatings9070456"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16319"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62242"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.publisher","MDPI"],["dc.relation.eissn","2079-6412"],["dc.relation.issn","2079-6412"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Predictability of Microbial Adhesion to Dental Materials by Roughness Parameters"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1534"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Polymers"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Schubert, Andrea"],["dc.contributor.author","Bürgers, Ralf"],["dc.contributor.author","Baum, Franziska"],["dc.contributor.author","Kurbad, Oliver"],["dc.contributor.author","Wassmann, Torsten"],["dc.date.accessioned","2021-07-05T15:00:49Z"],["dc.date.available","2021-07-05T15:00:49Z"],["dc.date.issued","2021"],["dc.description.abstract","Microbial adhesion to oral splints may lead to oral diseases such as candidiasis, periodontitis or caries. The present in vitro study aimed to assess the effect of novel computer-aided design/computer-aided manufacturing (CAD/CAM) and conventional manufacturing on Candida albicans and Streptococcus mutans adhesion to oral splint resins. Standardized specimens of four 3D-printed, two milled, one thermoformed and one pressed splint resin were assessed for surface roughness by widefield confocal microscopy and for surface free energy by contact angle measurements. Specimens were incubated with C. albicans or S. mutans for two hours; a luminometric ATP assay was performed for the quantification of fungal and bacterial adhesion. Both one-way ANOVA with Tukey post hoc testing and Pearson correlation analysis were performed (p < 0.05) in order to relate manufacturing methods, surface roughness and surface free energy to microbial adhesion. Three-dimensional printing and milling were associated with increased adhesion of C. albicans compared to conventional thermoforming and pressing, while the S. mutans adhesion was not affected. Surface roughness and surface free energy showed no significant correlation with microbial adhesion. Increased fungal adhesion to oral splints manufactured by 3D printing or milling may be relevant for medically compromised patients with an enhanced risk for developing candidiasis."],["dc.description.abstract","Microbial adhesion to oral splints may lead to oral diseases such as candidiasis, periodontitis or caries. The present in vitro study aimed to assess the effect of novel computer-aided design/computer-aided manufacturing (CAD/CAM) and conventional manufacturing on Candida albicans and Streptococcus mutans adhesion to oral splint resins. Standardized specimens of four 3D-printed, two milled, one thermoformed and one pressed splint resin were assessed for surface roughness by widefield confocal microscopy and for surface free energy by contact angle measurements. Specimens were incubated with C. albicans or S. mutans for two hours; a luminometric ATP assay was performed for the quantification of fungal and bacterial adhesion. Both one-way ANOVA with Tukey post hoc testing and Pearson correlation analysis were performed (p < 0.05) in order to relate manufacturing methods, surface roughness and surface free energy to microbial adhesion. Three-dimensional printing and milling were associated with increased adhesion of C. albicans compared to conventional thermoforming and pressing, while the S. mutans adhesion was not affected. Surface roughness and surface free energy showed no significant correlation with microbial adhesion. Increased fungal adhesion to oral splints manufactured by 3D printing or milling may be relevant for medically compromised patients with an enhanced risk for developing candidiasis."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2021"],["dc.identifier.doi","10.3390/polym13101534"],["dc.identifier.pii","polym13101534"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/87909"],["dc.language.iso","en"],["dc.notes.intern","DOI Import DOI-Import GROB-441"],["dc.relation.eissn","2073-4360"],["dc.relation.orgunit","Poliklinik für Zahnärztliche Prothetik"],["dc.rights","CC BY 4.0"],["dc.title","Influence of the Manufacturing Method on the Adhesion of Candida albicans and Streptococcus mutans to Oral Splint Resins"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]