Gamze Ozturk - Academia.edu (original) (raw)

Papers by Gamze Ozturk

Meandros Medical and Dental Journal, 2021

Objective: This retrospective clinical study aimed to investigate the long-term clinical success ... more Objective: This retrospective clinical study aimed to investigate the long-term clinical success of dental implants restored with splinted or non-splinted posterior prostheses with different retention systems. Materials and Methods: Fifty patients who had undergone dental implant surgery and prosthesis treatment and had a follow-up period of at least 2 years were included in this study. Marginal bone loss was measured from the surrounding bone levels on the mesial and distal surfaces of the implants using a millimetre ruler on panoramic radiographs. The plaque index (PI), gingival index (GI) and bleeding on probing (BOP) were also measured. The Mann-Whitney U test and ANOVA test were used for statistical analysis. Results: The mean values of mesial and distal bone loss were 0.72±0.81 and 0.62±0.58, respectively. The correlation coefficient between mesial and distal bone loss was 0.431; thus, a significant difference was found (p<0.05). A significant relationship was found between the GI (p=0.004) and PI (p=0.000) of dental implants with different retention types. No significant relationship was observed between BOP and retention type (p>0.05). Conclusion: Clinically, given the long-term maintenance of soft and hard tissue health, successful results can be achieved with a two-member fixed prosthetic rehabilitation plan on two implants. Amaç: Bu retrospektif klinik çalışma, posterior bölgedeki farklı retansiyon sistemlerine sahip splintli veya tek başına planlanan protetik tedavinin dental implantların uzun vadeli klinik başarısına etkisini değerlendirmektedir. Gereç ve Yöntemler: Çalışmaya, dental implant cerrahisi ve sonrasında protetik tedavi uygulanan ve en az iki yıllık takip süresi olan 50 hasta dahil edildi. Marjinal kemik kaybı, panoramik radyografiler üzerinde milimetrik bir cetvel kullanılarak implantların mezial ve distal yüzeylerini çevreleyen kemik seviyeleri göz önüne

Journal of Adhesion Science and Technology, 2019

The purpose of this study was to evaluate the effect of a selfetching primer on the bond strength... more The purpose of this study was to evaluate the effect of a selfetching primer on the bond strength of feldspathic porcelain with composite resin. Forty-eight feldspathic porcelain specimens (13 mm  13 mm  2 mm) were sectioned from CAD/CAM blocks. Specimens were randomly divided into 4 groups (n ¼ 12) as regards to surface treatment method; HF acid etching (HFE), Monobond Etch and Prime (MEP), sandblasting (SB), and MEP þ SB. After silane application for group HFE and SB, an adhesive bond was used as a bonding agent in all groups. Composite resin cylinders were build up onto the specimens. Specimens were stored in distilled water, thermocycled 5-55 C for 5500 cycles, and subjected to shear bond strength (SBS) test in a universal testing machine. Data were statistically analyzed by Kruskal-Wallis and Mann Whitney U test (a=.05). Type of failures was evaluated under optical microscopy and surfaces were examined by SEM at Â500 and Â2500 magnifications. There was a significant difference among groups. (p ¼ .019) HF group had the highest mean SBS value (17.54 ± 2.98 MPa) which was significantly higher than other groups (p<.05). Followed by the MEP þ SB group (14.68 ± 3.41 MPa), SB group (13.98 ± 3.34 MPa) and MEP group (12.75 ± 2.33 MPa). Nevertheless, the HFE group significantly has higher SBS value than other groups all of the tested surface treatment methods have reached the convenient bond strength values for repair. Although MEP showed clinically acceptable SBS values, further researches with another type of porcelains should be tested.

Journal of Prosthodontics, 2019

Purpose: To compare the marginal and internal fit of cobalt-chromium (Co-Cr) alloy copings fabric... more Purpose: To compare the marginal and internal fit of cobalt-chromium (Co-Cr) alloy copings fabricated by with lost wax technique (LW), computer-aided design and computer-aided manufacturing (CAD/CAM), and direct metal laser sintering (DMLS). Materials and Methods: Thirty-six tissue level, straight titanium abutments were screwed onto implant replicas. All specimens were embedded in acrylic resin and randomly divided into 3 subgroups according to the fabrication of metal coping: LW, CAD/CAM, and DMLS. In total, 36 (n = 12/group) Co-Cr implant-supported metal copings were prepared. Marginal, inter-marginal, axial, and occlusal fits of each coping were measured using the silicone replica technique. The data were evaluated statistically using one-way ANOVA, and Bonferioni post-hoc test (α = 0.05). Results: The CAD/CAM group showed significantly lower marginal fit than the LW group and DMLS groups (P < 0.001). The marginal fit of the LW group was not significantly different from the DMLS group (P = 0.721). No significant difference found among the fabrication methods in terms of inter-marginal fit (P = 0.913). The CAD/CAM group showed lower axial fit than the LW group (P = 0.026), but there was no statistical difference between the DMLS group and the LW (P = 0.999) and CAD/CAM groups (P = 0.247). No significant differences found among the fabrication methods in terms of occlusal fit (P = 0.158). Conclusions: The LW and DMLS groups showed better marginal fit compared to the CAD/CAM group; however, the CAD/CAM group was better than the LW group in terms of axial fit. All fabrication methods demonstrated similar inter-marginal and occlusal fit.

Journal of Prosthodontics, 2015

PURPOSE To investigate the effect of resin cement color on the post-cementation shade of thin lam... more PURPOSE To investigate the effect of resin cement color on the post-cementation shade of thin laminate veneers milled from multilayered glass ceramic blocks for each layer. MATERIALS AND METHODS Thin slices (N = 180) with two thicknesses (A: 8 × 8×0.55 mm and B: 8×8×0.8 mm; n = 90/group) were obtained from multilayered glass ceramic blocks using a diamond saw. Resin die specimens were prepared (8 × 8 × 4 mm) (n = 180) and divided into two resin cement colors (D:-3. L: +3) and one control group (C: translucent). Each slice was luted to the composite specimens using a dual-curing resin cement under a constant load of 250 g and light-polymerized for 120 seconds. Specimens were placed on a white background and CIELab values for each layer of the blank slices (incisal [In], body [Bo], and cervical [Ce]) were recorded using a dental contact spectrophotometer. The values were calculated as ΔE, and the data were statistically analyzed (one-way ANOVA, Shapiro-Wilk). RESULTS Mean ΔE values for A and B were significant (p < 0.05) for In (

Meandros Medical and Dental Journal, 2021

Objective: This retrospective clinical study aimed to investigate the long-term clinical success ... more Objective: This retrospective clinical study aimed to investigate the long-term clinical success of dental implants restored with splinted or non-splinted posterior prostheses with different retention systems. Materials and Methods: Fifty patients who had undergone dental implant surgery and prosthesis treatment and had a follow-up period of at least 2 years were included in this study. Marginal bone loss was measured from the surrounding bone levels on the mesial and distal surfaces of the implants using a millimetre ruler on panoramic radiographs. The plaque index (PI), gingival index (GI) and bleeding on probing (BOP) were also measured. The Mann-Whitney U test and ANOVA test were used for statistical analysis. Results: The mean values of mesial and distal bone loss were 0.72±0.81 and 0.62±0.58, respectively. The correlation coefficient between mesial and distal bone loss was 0.431; thus, a significant difference was found (p<0.05). A significant relationship was found between the GI (p=0.004) and PI (p=0.000) of dental implants with different retention types. No significant relationship was observed between BOP and retention type (p>0.05). Conclusion: Clinically, given the long-term maintenance of soft and hard tissue health, successful results can be achieved with a two-member fixed prosthetic rehabilitation plan on two implants. Amaç: Bu retrospektif klinik çalışma, posterior bölgedeki farklı retansiyon sistemlerine sahip splintli veya tek başına planlanan protetik tedavinin dental implantların uzun vadeli klinik başarısına etkisini değerlendirmektedir. Gereç ve Yöntemler: Çalışmaya, dental implant cerrahisi ve sonrasında protetik tedavi uygulanan ve en az iki yıllık takip süresi olan 50 hasta dahil edildi. Marjinal kemik kaybı, panoramik radyografiler üzerinde milimetrik bir cetvel kullanılarak implantların mezial ve distal yüzeylerini çevreleyen kemik seviyeleri göz önüne

Journal of Adhesion Science and Technology, 2019

The purpose of this study was to evaluate the effect of a selfetching primer on the bond strength... more The purpose of this study was to evaluate the effect of a selfetching primer on the bond strength of feldspathic porcelain with composite resin. Forty-eight feldspathic porcelain specimens (13 mm  13 mm  2 mm) were sectioned from CAD/CAM blocks. Specimens were randomly divided into 4 groups (n ¼ 12) as regards to surface treatment method; HF acid etching (HFE), Monobond Etch and Prime (MEP), sandblasting (SB), and MEP þ SB. After silane application for group HFE and SB, an adhesive bond was used as a bonding agent in all groups. Composite resin cylinders were build up onto the specimens. Specimens were stored in distilled water, thermocycled 5-55 C for 5500 cycles, and subjected to shear bond strength (SBS) test in a universal testing machine. Data were statistically analyzed by Kruskal-Wallis and Mann Whitney U test (a=.05). Type of failures was evaluated under optical microscopy and surfaces were examined by SEM at Â500 and Â2500 magnifications. There was a significant difference among groups. (p ¼ .019) HF group had the highest mean SBS value (17.54 ± 2.98 MPa) which was significantly higher than other groups (p<.05). Followed by the MEP þ SB group (14.68 ± 3.41 MPa), SB group (13.98 ± 3.34 MPa) and MEP group (12.75 ± 2.33 MPa). Nevertheless, the HFE group significantly has higher SBS value than other groups all of the tested surface treatment methods have reached the convenient bond strength values for repair. Although MEP showed clinically acceptable SBS values, further researches with another type of porcelains should be tested.

Journal of Prosthodontics, 2019

Purpose: To compare the marginal and internal fit of cobalt-chromium (Co-Cr) alloy copings fabric... more Purpose: To compare the marginal and internal fit of cobalt-chromium (Co-Cr) alloy copings fabricated by with lost wax technique (LW), computer-aided design and computer-aided manufacturing (CAD/CAM), and direct metal laser sintering (DMLS). Materials and Methods: Thirty-six tissue level, straight titanium abutments were screwed onto implant replicas. All specimens were embedded in acrylic resin and randomly divided into 3 subgroups according to the fabrication of metal coping: LW, CAD/CAM, and DMLS. In total, 36 (n = 12/group) Co-Cr implant-supported metal copings were prepared. Marginal, inter-marginal, axial, and occlusal fits of each coping were measured using the silicone replica technique. The data were evaluated statistically using one-way ANOVA, and Bonferioni post-hoc test (α = 0.05). Results: The CAD/CAM group showed significantly lower marginal fit than the LW group and DMLS groups (P < 0.001). The marginal fit of the LW group was not significantly different from the DMLS group (P = 0.721). No significant difference found among the fabrication methods in terms of inter-marginal fit (P = 0.913). The CAD/CAM group showed lower axial fit than the LW group (P = 0.026), but there was no statistical difference between the DMLS group and the LW (P = 0.999) and CAD/CAM groups (P = 0.247). No significant differences found among the fabrication methods in terms of occlusal fit (P = 0.158). Conclusions: The LW and DMLS groups showed better marginal fit compared to the CAD/CAM group; however, the CAD/CAM group was better than the LW group in terms of axial fit. All fabrication methods demonstrated similar inter-marginal and occlusal fit.

Journal of Prosthodontics, 2015

PURPOSE To investigate the effect of resin cement color on the post-cementation shade of thin lam... more PURPOSE To investigate the effect of resin cement color on the post-cementation shade of thin laminate veneers milled from multilayered glass ceramic blocks for each layer. MATERIALS AND METHODS Thin slices (N = 180) with two thicknesses (A: 8 × 8×0.55 mm and B: 8×8×0.8 mm; n = 90/group) were obtained from multilayered glass ceramic blocks using a diamond saw. Resin die specimens were prepared (8 × 8 × 4 mm) (n = 180) and divided into two resin cement colors (D:-3. L: +3) and one control group (C: translucent). Each slice was luted to the composite specimens using a dual-curing resin cement under a constant load of 250 g and light-polymerized for 120 seconds. Specimens were placed on a white background and CIELab values for each layer of the blank slices (incisal [In], body [Bo], and cervical [Ce]) were recorded using a dental contact spectrophotometer. The values were calculated as ΔE, and the data were statistically analyzed (one-way ANOVA, Shapiro-Wilk). RESULTS Mean ΔE values for A and B were significant (p < 0.05) for In (