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  1. Article ; Online: Does intramedullary elastic nail augmentation increase resistance to bending stress in plate fixation of long bones? A biomechanical study on lamb cadaveric femurs.

    Eren, Erdal / Büyükdoğan, Halil / Ertürk, Cemil / Türkcan, Julide Hazal / Keleşoğlu, Ergün

    Joint diseases and related surgery

    2023  Volume 34, Issue 3, Page(s) 620–627

    Abstract: Objectives: The aim of this study was to evaluate the bending strength of plate-screw fixation augmented with titanium elastic nails (TENs) in a simple long bone fracture model using lamb cadaver femurs.: Materials and methods: A total of 24 lamb ... ...

    Abstract Objectives: The aim of this study was to evaluate the bending strength of plate-screw fixation augmented with titanium elastic nails (TENs) in a simple long bone fracture model using lamb cadaver femurs.
    Materials and methods: A total of 24 lamb cadaveric femurs that were osteotomized transversely from the mid-diaphysis with a bone saw were used to obtain a simple fracture model. The femurs were divided randomly into three groups. In Group 1, only plate-screw was used for fixation. In Group 2, plate-screw fixation was augmented with a 2.5-mm TEN. In Group 3, plate-screw fixation was augmented with two 2.5-mm TENs. Each bone model was positioned on a mechanical testing machine. Subsequently, three-point bending loads were applied to each bone to measure the force required for failure at the osteotomy site. The data were recorded on a computer connected to the test device and the bending strengths of all samples were calculated.
    Results: There was no statistically significant difference in the bending strength (megapascals) between Groups 1 and 2 or between Groups 2 and 3 (p>0.05). However, the bending strength in Group 3 was significantly higher than in Group 1 (p<0.05).
    Conclusion: The application of intramedullary TEN during surgery in long bone fractures, combined with a bridge plate, may be helpful to strengthen the fixation stability.
    MeSH term(s) Sheep ; Animals ; Humans ; Bone Plates ; Bone Screws ; Diaphyses ; Osteotomy ; Cadaver ; Titanium
    Chemical Substances Titanium (D1JT611TNE)
    Language English
    Publishing date 2023-08-21
    Publishing country Turkey
    Document type Journal Article
    ISSN 2687-4792
    ISSN (online) 2687-4792
    DOI 10.52312/jdrs.2023.1041
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Effects of Different Bonding Agents on the Shear Bond Strength Between Monolithic Zirconia and Indirect Composite.

    Mergen, Elif Saracoglu / Comert, Zekeriya Yasar / İşsever, Dilara Seyma Alpkilic / Kelesoğlu, Ergun / Deger, Sabire Isler

    The International journal of prosthodontics

    2023  Volume 36, Issue 4, Page(s) 13–28

    Abstract: Purpose: To investigate the effects of different bonding agents and application of glaze on the shear bond strength (SBS) between monolithic zirconia (MZ) and indirect composite (IC).: Materials and methods: Five different bonding agents (G-Premio ... ...

    Abstract Purpose: To investigate the effects of different bonding agents and application of glaze on the shear bond strength (SBS) between monolithic zirconia (MZ) and indirect composite (IC).
    Materials and methods: Five different bonding agents (G-Premio Bond [GP]; Tokuyama Universal Bond [TU]; Signum Zirconia bond [SZ]; Clearfil Ceramic Primer Plus [CCP]; Z-Prime Plus [ZP]) were applied to a total of 200 MZ disk-shaped specimens (n = 100 glazed and 100 nonglazed). Half of the specimens then underwent thermocycling and the other half no thermocycling (n = 10 specimens each subgroup). The experimental setup was prepared as two pieces according to the ISO TR 11405 standards. Specimens embedded in acrylic resin were placed into the experimental setup and a universal testing machine at a crosshead speed of 0.5 mm/minute. Mann-Whitney U test and Kruskal-Wallis test were used for statistical analyses. Bonferroni correction was then performed, and test results with P < .05 were accepted as statistically significant.
    Results: The application of glaze significantly enhanced SBS when ZP or CCP was used; however, it did not have any significant effect when GP, TU, or SZ were used. Thermocycling significantly decreased the SBS in all bonding agent groups except GP specimens with glaze (P = .16). The highest SBS in all conditions was noted when GP and TU were used.
    Conclusions: These findings suggest that the bonding agents GP and TU may be recommended for better bonding between MZ and IC.
    MeSH term(s) Research Design ; Resin Cements ; Shear Strength
    Chemical Substances zirconium oxide (S38N85C5G0) ; Clearfil Ceramic Primer ; Resin Cements
    Language English
    Publishing date 2023-08-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 645046-5
    ISSN 1942-4426 ; 0893-2174
    ISSN (online) 1942-4426
    ISSN 0893-2174
    DOI 10.11607/ijp.8340
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2430: Show issues Location:
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  3. Article ; Online: The Effect of Preceramic Soldering on Fracture Resistance of 4-Unit Zirconia Fixed Dental Prostheses.

    İrem, Diler Özkan / Cömert, Zekeriya Yaşar / Alpkılıç, Dilara Şeyma / Keleşoğlu, Ergün / İşler Değer, Sabire

    Journal of prosthodontics : official journal of the American College of Prosthodontists

    2022  

    Abstract: Purpose: Preceramic soldering of zirconia may deliver better fitting restorations. However, there is not sufficient evidence regarding the influence of preceramic soldering of zirconia restorations on mechanical strength. The aim of this study was to ... ...

    Abstract Purpose: Preceramic soldering of zirconia may deliver better fitting restorations. However, there is not sufficient evidence regarding the influence of preceramic soldering of zirconia restorations on mechanical strength. The aim of this study was to evaluate the effect of preceramic soldering on the fracture load of 4-unit zirconia fixed dental prostheses (FDPs).
    Materials and methods: Eighty samples of 4-unit FDPs between maxillary right first premolar and maxillary right second molar were prepared and two restorative materials were used as a framework (Z) and monolithic restoration (M). The samples were divided into two subgroups as control (C) and study (S). The restorations of study groups (S) were divided into two pieces and soldered with a bonding material (DCM HotBond Zirkon). The groups were divided into two subgroups for thermal cycle (T) application. After soldering and thermal cycling application, 4-point bending test was applied to the samples at a cross-head speed of 1 mm/min in a universal testing machine and the fracture load was recorded. The data was analyzed statistically, and the level of significance was set at α = 0.001.
    Results: Statistically significant differences were found among the groups, based on the results of maximum failure loads (p < 0.001). The highest mean failure load was observed in the ZCT(-) group (1094.1 + 139.77 N), while the lowest mean failure load was obtained in the ZST(+) group (627.7 + 82.14 N). No significant difference was found among the groups MC and MS, MC, and ZC groups (p > 0.001). Thermal aging application caused lower fracture resistance in control and soldering groups (p < 0.001).
    Conclusions: The preceramic soldering applications affected zirconia group negatively. However, the values were above the clinically acceptable static load bearing capacity for posterior teeth. Soldering did not cause a statistically significant difference for the fracture strengths of monolithic zirconia groups. Thermal cycling affected the fracture strength of zirconia and monolithic zirconia restorations negatively.
    Language English
    Publishing date 2022-02-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1197213-0
    ISSN 1532-849X ; 1059-941X
    ISSN (online) 1532-849X
    ISSN 1059-941X
    DOI 10.1111/jopr.13488
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4029: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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  4. Article ; Online: In vitro bioactivity of laser surface-treated Ti6Al4V alloy.

    Yoruç, Afife Binnaz Hazar / Keleşoğlu, Ergün / Yıldız, Harika Ekşioğlu

    Lasers in medical science

    2019  Volume 34, Issue 8, Page(s) 1567–1573

    Abstract: The effects of lasing parameters on the precipitation of hydroxyapatite (HA) on the commercial Ti6Al4V alloy in simulated body fluid (SBF) were investigated. Ti6Al4V plates were polished and ultrasonically cleaned in acetone and ethyl alcohol, ... ...

    Abstract The effects of lasing parameters on the precipitation of hydroxyapatite (HA) on the commercial Ti6Al4V alloy in simulated body fluid (SBF) were investigated. Ti6Al4V plates were polished and ultrasonically cleaned in acetone and ethyl alcohol, respectively. The specimen surfaces were treated with Er:YAG laser using super short pulse (SSP, 50 μs) and very short pulse (VSP, 100 μs) modes. Surface roughness was measured before and after laser treatment. The specimens were immersed in simulated body fluid (SBF) for 1, 3, and 7 days and, then the amount of Ca and P precipitation on specimens was determined using SEM/EDS analysis. An average roughness varying between 0.19 and 0.81 μm in surface roughness was detected in all laser-treated specimens depending on the lasing parameters. The highest surface roughness and Ca precipitation were found in VSP group (20 Hz and 5 W). Laser treatment of specimen surfaces has dramatically increased the HA precipitation due to the increasing surface roughness. It is also concluded that the immersion time was effective on the HA precipitation as well.
    MeSH term(s) Alloys/pharmacology ; Biocompatible Materials/pharmacology ; Computer Simulation ; Lasers, Solid-State ; Spectrometry, X-Ray Emission ; Surface Properties ; Titanium/pharmacology
    Chemical Substances Alloys ; Biocompatible Materials ; titanium alloy (TiAl6V4) (12743-70-3) ; Titanium (D1JT611TNE)
    Language English
    Publishing date 2019-02-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 632808-8
    ISSN 1435-604X ; 0268-8921
    ISSN (online) 1435-604X
    ISSN 0268-8921
    DOI 10.1007/s10103-019-02746-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 2148: Show issues Location:
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  5. Article ; Online: Effects of irrigation temperature on heat control in vitro at different drilling depths.

    Sener, Bedrettin Cem / Dergin, Guhan / Gursoy, Bahar / Kelesoglu, Ergun / Slih, Imad

    Clinical oral implants research

    2009  Volume 20, Issue 3, Page(s) 294–298

    Abstract: Purpose: Thermal injury during implant bed preparation has a major influence on implant osseointegration and survival. This study investigated the effectiveness of the temperature of the saline solution used for heat control during drilling.: Material ...

    Abstract Purpose: Thermal injury during implant bed preparation has a major influence on implant osseointegration and survival. This study investigated the effectiveness of the temperature of the saline solution used for heat control during drilling.
    Material and methods: Fresh frozen edentulous segments of bovine mandibles were sectioned into 12 x 6 cm pieces. Thermoresistors were placed 0.5 mm from the drilling cavity walls, at depths of 3, 7, and 12 mm. Signals from the three thermoresistors were analyzed using ORIGIN 5.0 software.
    Results: The maximum temperatures during drilling without irrigation were 50.9, 47.4, and 38.1 degrees C at depths of 3, 7, and 12 mm, respectively. With irrigation using saline at 25 and 10 degrees C, the maximum temperatures at a depth of 12 mm were 37.4 and 36.3 degrees C, respectively. All other measurements with both 25 and 10 degrees C saline were below body temperature.
    Discussion and conclusion: This experimental in vitro study showed that more heat was generated in the superficial part of the drilling cavity than at the bottom. Therefore, external irrigation at room temperature can provide sufficient cooling during drilling. Lower temperature saline was more effective in cooling the bone, and irrigation of the site should be continued between the drilling steps.
    MeSH term(s) Animals ; Body Temperature ; Burns/etiology ; Burns/prevention & control ; Cattle ; Dental High-Speed Technique/adverse effects ; Dental Implantation, Endosseous/instrumentation ; Dental Implantation, Endosseous/methods ; Hot Temperature/adverse effects ; Mandible/surgery ; Osteonecrosis/etiology ; Osteonecrosis/prevention & control ; Therapeutic Irrigation/methods
    Language English
    Publishing date 2009-03
    Publishing country Denmark
    Document type Journal Article
    ZDB-ID 1067626-0
    ISSN 1600-0501 ; 0905-7161
    ISSN (online) 1600-0501
    ISSN 0905-7161
    DOI 10.1111/j.1600-0501.2008.01643.x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3171: Show issues Location:
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