Faruk Emir

University of Health Sciences Antigua

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Effect of Denture Cleansing Solutions on the Retention of Locator Attachments Over Time

Journal of Prosthodontics (2020)

Simel Ayyıldız Cem Şahin Faruk Emir Bahadır Ersu

To evaluate and compare the alterations in retention of three Locator attachments after immersion in various denture cleansers at defined time intervals.Two implants were embedded in an acrylic block. Pink, blue, and clear Locator attachments (n = 10 for each subgroup) were immersed into three different cleansing solutions (Corega, Protefix and NaOCl) and tap water (control) at different time intervals that simulate 1 (T1 ), 6 (T2 ), and 12 (T3 ) months of clinical use. Universal testing machine set at a crosshead speed of 50 mm/min was used for pull-out tests. After the immersion procedure, the peak force to dislodgement was recorded to demonstrate the changes in retention of Locator attachments. Data were analyzed using repeated-measures ANOVA followed by Tukey's Honestly Significant Difference (HSD) tests (α = .05).All denture cleansing solutions affected the retentive values of all Locator attachments at defined time intervals (F = 4.299, p = 0.001). NaOCl affected all groups significantly after 12-month immersion time (p = 0.001). The least retention loss at all subgroups was observed in Corega for clear Locator attachments (106.17 ± 5.21 N). The difference in retention values for pink attachments were not statistically significant for tap water, Protefix and Corega immersion at all time intervals (p > 0.05). Following NaOCl (blue; 33.31 ± 4.72 N, clear; 52.3 ± 8.5 N), tap water decreased the retention value of blue (41.14 ± 3.93 N) and clear (76.72 ± 8.42 N) Locator attachments at T3 . Corega caused the least retention loss to clear attachments at T1 (106.17 ± 3.55 N).The retention of Locator attachments decreases over time after exposure to various denture cleansing solutions. As NaOCl significantly decreased the retentive values of all attachments, patients must be informed about that disadvantage. Also, tap water remarkably decreased retentive ability of all attachments. Periodic addition of an effervescent tablet into tap water may be recommended to patients that wear implant retained overdentures with Locator attachments.

Crosshead

Acrylic resin

Retention time

Immersion

Sodium hypochlorite

Tap water

10.1111/jopr.13144

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Citations (18)

Shear bond strength of various luting cements to fixed prosthodontic restorative materials

Applied Adhesion Science (2015)

Simel Ayyıldız Faruk Emir Elif Tunç Deniz Şen

The aim of this study was to evaluate the shear bond strength (SBS) of three different cements to zirconia and lithium disilicate ceramic surface after thermal cycling. Thirty zirconia (Z) and thirty lithium disilicate (L) disk specimens were prepared in 8 mm in diameter and 3.4 mm in thickness from zirconia and lithium disilicate ceramic blocks. Each group was divided into three subgroups (n:10). The specimens from all groups were bonded with three different cements using transparent polyethylene tubes: Zn-Phosphate cement (ZPC); self-adhesive resin cement (SARC); adhesive resin cement (ARS). The specimens were then subjected to thermal aging procedure for 1 week under 37 °C water bath. Shear bond strength (SBS) was determined using a universal testing machine at a crosshead speed of 1 mm/min. The specimens were also examined both with a scanning electron microscope (SEM) and a stereomicroscope. Statistical analysis was performed with one-way ANOVA. Pair-wise statistical comparison was made with Tukey test. The overall significance level was set at α = 0.05. For the tested groups, the SBS values ranged from 0.29 ± 0.03 to 12.10 ± 0.25 MPa. L-SARC group yielded the highest SBS value (p < 0.05) among the groups, while Z-ZPC group had the lowest (p < 0.05). Significantly higher SBS values were found for all the groups of lithium disilicate disk specimens (L) when compared to those of zirconia disk specimens (Z) (p < 0.05). Tukey’s pairwise comparisons revealed that SBS values of SARC groups were significantly higher than those of the ARC and ZPC groups (p < 0.05). Mode of failure analysis results showed that, the modes of failures were mixed with adhesive debonding predominantly with minimal resin residues (<10 %) for SARC groups. However, the other groups showed adhesive failure predominantly. Within the limitation of this in vitro study, it was concluded that selfadhesive resin cement had the highest shear bond strength values when bonded to lithium disilicate and zirconia ceramic surface. However zinc-phosphate cement demonstrated significantly lower shear bond strength values for both ceramic groups.

Universal testing machine

Stereo microscope

Tukey's range test

10.1186/s40563-015-0039-z

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Citations (11)

Evaluating the accuracy of CAD/CAM optimized stones compared to conventional type IV stones

PLoS ONE (2023)

Gülsüm Ceylan Faruk Emir

This study compared the accuracy (trueness and precision) of stone models fabricated using two brands of CAD/CAM optimized stones Cerec Stone (BC) and Elite Master (EM), and a conventional type IV stone Elite Rock Fast (ERF). 30 conventional Type IV and scannable stone complete-arch models were scanned with a blue LED extraoral scanner, and root mean square values were obtained. 6 abutments were used in complete-arch models. The digital models were compared with the master model to evaluate their trueness using model superimposition with Geomagic software. Precision was determined for each case by superimposing combinations of the 10 datasets in each group. The point cloud density of each model was calculated with MeshLab software. Kruskal-Wallis and Mann-Whitney non-parametric tests were used for the statistical analysis. The trueness of the stone models was 96 μm for the BC, 88.2 μm for the EM, and 87.6 μm for the ERF. There were no significant differences between the tested dental stones (p = .768). However, the EM models (35.6 μm) were more precise than the BC (46.9 μm) and ERF (56.4 μm) models (p = .001, p < .001). EM models also showed the highest point cloud density. There were significant differences in point cloud density (p = .003). The EM models showed significant differences in precision but no significant differences in terms of trueness. Although EM was more precise and had the highest point cloud density, all models were within the clinically acceptable limit.

CEREC

Superimposition

10.1371/journal.pone.0282509

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Citations (3)

Microscopic evaluation of the thickness and structure of the cement and cement–dentin interdiffusion zone after luting posts with three different luting cements

Journal of Adhesion Science and Technology (2016)

Simel Ayyıldız Elif Tunç Faruk Emir Deniz Şen

Clinical studies report that failures of fiber post cementation occur mainly at the cement–dentin interface. The aim of this in vitro study is to compare the scanning electron microscopic (SEM) evaluations of the cement thicknesses in the root canals and the thickness of cement–dentin interface zones obtained after luting standardized glass-fiber posts with three different types of luting cements. Thirty single-rooted mandibular premolars of similar sizes were prepared for post insertion after biomechanical preparation and obturation. They were divided into three groups containing 10 samples each. Standardized glass-fiber posts were cemented with zinc phosphate cement for ZNP group, with conventional adhesive resin cement for CAR group, and with self-adhesive resin cement for SAR group. The formation and thickness of cement and cement–dentin interface zone were evaluated by stereomicroscope and SEM using ×800 magnification, and the data were analyzed. There was no significant difference between groups in terms of cement thickness (p = 0.835); however, there were significant differences among the cement layer thicknesses measured at the three examined levels of the root canals (p = 0.000). The groups using conventional adhesive resin cement presented longer micromechanical interlocking while the groups using self-adhesive resin cement showed wide gaps and zinc phosphate cement showed no bonding between cement–dentin interdiffusion zones along the root canal. As a clinical consequence, the use of zinc phosphate cement may not provide strong bond between dentin–cement interface. Conventional adhesive resin cements showed reliable bond to dentin when compared to zinc phosphate and self-adhesive resin cement.

Cementation (geology)

Luting agent

Dental cement

Zinc phosphate

Smear layer

10.1080/01694243.2015.1137698

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Citations (2)

Portrayal and management of a rarely seen alveolar bone resorption pattern mimicking the Combination Syndrome: a clinical report

Cumhuriyet Dental Journal (2014)

Bülent Pişkin Cumhur Sipahi Faruk Emir Simel Ayyıldız Hakan Avsever

Treatment of severely resorbed edentulous alveolar ridges is still a challenging topic of prosthodontics.Combination Syndrome is one of the most remarkable intraoral manifestations of excessive alveolar bone resorption which may be observed at the denture wearing patients with complete edentulous maxilla and bilateral partial edentulous mandibula.Since its first recognition in 1972, the major symptoms and morphological features of the Combination Syndrome such as enlarged maxillary tuberosities and resorbed edentulous ridges were often portrayed as being bilaterally located in either sides of the midsagittal plane.The aim of the present study was to describe a rarely seen alveolar bone resorption pattern mimicking the Combination Syndrome and to report the prosthetic treatment approach applied for its rehabilitation.

10.7126/cdj.58140.5000070518

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Citations (0)