Browsing by Author "Kan, Bahadir"

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    Effect of Residual Bone Height and Implant Macro-Design on Primary Stability in Sinus Floor Elevation: An Ex Vivo Study
    (Allen Press inc, 2023) Tokuc, Berkay; Çakır, Merve; Kan, Bahadır; Yalçın Ülker, Gül Merve; Meral, Deniz Gökçe; Kan, Bahadir; Ağız,Diş ve Çene Cerrahisi / Oral, Dental and Maxillofacial Surgery
    The objective was to evaluate the influence of residual bone height (RBH) and implant macro -design on the primary stability (PS) of implants using a simultaneous sinus floor elevation (SFE) and implant insertion model. Fresh bovine rib samples that resembled type -IV density that were confirmed by computerized tomography were prepared to represent 4 groups of varying RBHs (3, 6, 9, 15 mm). To simulate simultaneous implant insertion with SFE, 120 implants in different macro -designs (group R: NobelReplace; group P: NobelParallel; group A: NobelActive, Nobel Biocare, Gothenburg, Sweden) were randomly inserted at RBHs of 3, 6, 9, and 15 mm in each rib. The implant stability quotient (ISQ) was measured immediately after implant insertion. RBH and implant macro -design have an impact on ISQ values (P < .001). ISQ values were the highest with RBH of 15 mm, followed by RBHs of 9, 6, and 3 mm. (P < .001). There was no statistically significant difference between different implant macro -designs at RBHs of 3 and 15 mm regarding ISQ values (P = .111, P = .551). ISQ values of group P were higher than those of group R and group A at an RBH of 6 mm (P = .049, P = .029). ISQ values were also higher in group P compared to group A at an RBH of 9 mm (P = .006). A higher PS may be expected in sites with higher RBH, regardless of the macro -design. In addition, cylindric implant design may enhance the PS at RBHs of 6 and 9 mm in simultaneous implant insertion with SFE.
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    Citation Count: 5
    The effect of triangular cross-section neck design on crestal bone stability in the anterior mandible: A randomized, controlled, split-mouth clinical trial
    (Wiley, 2021) Tokuc, Berkay; Kan, Bahadır; Ağız,Diş ve Çene Cerrahisi / Oral, Dental and Maxillofacial Surgery
    Objectives This randomized controlled trial aimed to compare crestal bone loss (CBL) and buccal bone thickness (BBT) around triangular cross-section neck (TN) to round neck (RN) implants retaining mandibular overdentures one year after loading, using cone beam computed tomography (CBCT). Material and Methods Twenty edentulous patients receiving 40 implants with similar diameters were randomly assigned to the RN and TN groups. Clinical buccal bone thickness (CBBT) around the implants was measured with a caliper at baseline. A resonance frequency analyzer was used to measure the implant stability quotient (ISQ) at the baseline and two months after insertion. Pocket probing depths (PPD), plaque index (PI), and gingival index (GI) were also recorded at postoperative months 2, 6, and 12. CBCT was used to evaluate proximal CBL and BBT at three levels (0, -2, and -4 mm) one year after loading. Results No implant loss was observed during the follow-up period. No significant differences in CBBT, ISQ values, and scores for PPD, PI, and GI between the two groups were observed at any time (p > .05). BBT was also comparable one year after loading (p > .05). The mean +/- SD proximal CBL one year after loading was 0.58 +/- 0.36 mm for TN and 0.91 +/- 0.59 mm for RN (p < .01). Conclusions This study found better crestal bone preservation in the implants with the novel neck design than conventional neck design in the anterior mandible after a follow-up of one year. However, it may not be clinically noticeable.
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    The effect of triangular cross-section neck design on crestal bone stability in the anterior mandible: A retrospective study with a 5-year follow-up
    (Wiley, 2023) Tokuc, Berkay; Kan, Bahadır; Ağız,Diş ve Çene Cerrahisi / Oral, Dental and Maxillofacial Surgery
    Objectives: The objective of this study, which included a 5-year follow-up, was to compare peri-implant soft tissue health, crestal bone loss (CBL), and buccal bone thickness (BBT) around triangular cross-section neck (TN) or round neck (RN) implants, using cone-beam computed tomography.Materials and Methods: This study was initially designed as a prospective 1-year randomized controlled study and then extended with a 5-year retrospective evaluation of clinical and radiographic records. In the initial 1-year study, a total of 20edentulous patients receiving 40 implants with similar diameters were randomly assigned to the RN or TN groups using a split-mouth design. Pocket probing depths (PPD), plaque index (PI), and gingival index (GI) were recorded at postoperative month 12. CBL and BBT at three levels (0, -2, and -4 mm) were evaluated 1 year after insertion. Five years after insertion, PPD, PI, GI, CBL, and BBT were recorded as patients were recalled for clinical and radiographic monitoring.Results: Nineteen patients completed the study. After 5 years, no significant differences in PPD, PI, and GI scores and BBT values between the two groups (p > .05). The mean +/- SD CBL values at the final follow-up visit were -0.71 +/- 0.69 mm for TN and -1.03 +/- 0.86 mm for RN (p < .01).Conclusions: These results suggest better crestal bone preservation using implants with TN when compared to RN after a 5-year follow-up. However, TN showed similar results to RN regarding peri-implant soft tissue health and BBT.
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    The effects of diode and Er:YAG laser applications on the surface topography of titanium grade 4 and titanium zirconium discs with sand-blasted and acid-etched (SLA) surfaces
    (Elsevier, 2024) Ozturk, Anil; Kan, Bahadır; Meral, Salih Eren; Bastan, Fatih Erdem; Ustel, Fatih; Kan, Bahadir; Avcu, Egemen; Ağız,Diş ve Çene Cerrahisi / Oral, Dental and Maxillofacial Surgery
    Background: Laser application for the treatment of peri-implantitis provides a variety of advantages; however, depending on the laser type and parameters, it may also have adverse effects on the implant surface qualities. This study's objective is to assess the effects of laser type and parameters on the surface properties of two different titanium-based implant materials: titanium Grade 4 (Ti-Grade 4) and titanium zirconium (Ti-Zr) discs with sand-blasted and acid-etched (SLA) surfaces under in vitro conditions. Material & method: Sand-blasted and acid-etched discs made of titanium grade 4 (Ti-Grade 4) and titanium zirconium (Ti-Zr) were treated using 808 nm AlGaAs (diode) and 2940 nm Er:YAG lasers with varying parameters (i.e., diode laser in continuous wave mode, Er:YAG in short pulse mode, and Er:YAG in variable square pulse mode with four different doses). Then, the surface morphology and topography of the treated discs were characterized using scanning electron microscopy and optical profilometry. Results: The 3D surface topographies of discs treated with a high power Er:YAG laser displayed irregular peaks and deep valleys, indicating surface deterioration. The average surface roughness values (Sa) of both discs varied with laser type and parameters (3.55-4.80 mm for Ti-Grade 4 versus 3.25-4.5 mm for Ti-Zr). With diode laser applications, the topography features of the discs were preserved despite a small number of irregular valleys and peaks. However, the surface morphologies of the discs were dramatically altered by erosion and local melting because of the Er:YAG laser treatment. Conclusion: Diode laser application appears to be the most reliable method for treating peri-implantitis, as diode laser-treated implants retained their overall surface quality despite a small number of irregular peaks and valleys.