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    Comparative evaluation of desensitizing agents on shear bond strength of zirconia to dentin
    (BMC, 2024) Cotert, Irem; Aytug, Merve; Cotert, H. Serdar
    Background The purpose of the study is to evaluate the effect of 7 different desensitizing agents on the shear bond strength (SBS) of zirconia restorations to dentin with a self-adhesive resin cement and determine the failure modes. Methods Eighty molars' occlusal surfaces were ground to expose dentin and were randomly divided into 8 groups (n = 10): 1. Gluma (HEMA/Glutaraldehyde) 2. Bifluoride (Sodium Fluoride/Calcium Fluoride) 3. Admira (Bis-GMA/HEMA) 4. Smart Protect (Glutaraldehyde) 5. Teethmate (Tetracalcium phosphate, Dicalcium phosphate) 6. Clinpro White (Sodium fluoride) 7. BisBlock (Oxalic acid) and 8. Control (No-treatment). After applying the agent, a self-adhesive resin cement (Rely-X U200) was used to lute zirconia discs (4 mm height and 4 mm diameter) to dentin. After stored in distilled water at 37 degrees C for 24 h, all groups were thermocycled for 2500 cycles between 5 +/- 2 degrees C and 55 +/- 2 degrees C. Specimens were submitted to SBS test with a universal testing machine at a crosshead speed of 0.5 mm/min until failure. SBS values were compared with ANOVA. Post-hoc multiple comparisons were performed with Dunnett T3. The failure modes of specimens were examined with stereomicroscope at a magnification of 20X and the distribution of the failure modes were evaluated with Pearson Chi-Square test. Results Regarding mean SBS values in MPa's; Admira (10.70 +/- 3.99), Smart Protect (9.62 +/- 3.93), and Gluma (8.90 +/- 3.76) treatments showed higher SBS values compared to control group (p < .05) according to ANOVA. The SBS values of Teethmate (5.31 +/- 2.37) and Clinpro White (4.32 +/- 2.44) were higher than control group but the difference was not found significant (p > .05). BisBlock (2.33 +/- 1.94) and Bifluouride (1.60 +/- 1.47) groups showed the lowest SBS values but their difference between control group was not found statistically significant (p > .05). Most specimens showed adhesive failure but no statistically significant difference was found in the distributions of failure modes according to Chi-square test. Conclusion Within the limitation of the study; Admira, Smart Protect, and Gluma increased the SBS of the zirconia restorations to dentin and can be recommended to use on prepared dentin surfaces prior to the cementation.
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    Computed Tomography-Based Planning and Three-Dimensional Modeling for Craniofacial Implant Placement: A Technical Note
    (Quintessence Publishing Co Inc, 2009) Kurtulmus, Huseyin; Cotert, H. Serdar; Guneri, Pelin
    Facial defects can result from trauma. treatment of neoplasms, or congenital malformations, and their restoration is still a challenge for both surgeon and prosthodontists Craniofacial implants can provide many benefits for prosthetic rehabilitation of facial defects, however, accurate placement of extraoral implants is vital for clinical success Three-dimensional modeling is a novel technique that not only helps the surgeon to evaluate potential bone sites and adjacent structures, but also facilitates planning of the extraoral implant treatment by the prosthodontist. This technical report describes the use of three-dimensional modeling and planning for craniofacial implant placement. INT J ORAL MAXILLOFAC IMPLANTs 2009;24:943-946
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    Computed Tomography-Based Planning and Three-Dimensional Modeling for Craniofacial Implant Placement: A Technical Note
    (Quintessence Publishing Co Inc, 2009) Kurtulmus, Huseyin; Cotert, H. Serdar; Guneri, Pelin
    Facial defects can result from trauma. treatment of neoplasms, or congenital malformations, and their restoration is still a challenge for both surgeon and prosthodontists Craniofacial implants can provide many benefits for prosthetic rehabilitation of facial defects, however, accurate placement of extraoral implants is vital for clinical success Three-dimensional modeling is a novel technique that not only helps the surgeon to evaluate potential bone sites and adjacent structures, but also facilitates planning of the extraoral implant treatment by the prosthodontist. This technical report describes the use of three-dimensional modeling and planning for craniofacial implant placement. INT J ORAL MAXILLOFAC IMPLANTs 2009;24:943-946
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    The Effect of Various Preparation Designs on the Survival of Porcelain Laminate Veneers
    (Quintessence Publishing Co Inc, 2009) Cotert, H. Serdar; Duendar, Mine; Ozturk, Berran
    Purpose: The aim of this clinical study was to observe the service duration of porcelain laminate veneers (PLVs) and to estimate the influence of the categorical covariates such as location, tooth vitality, preparation depth. incisal. gingival and proximal finishing lines, and peripheral tissue type on the survival rates of event-free and overall service duration. Materials and Methods: A total of forty patients (26 women. 14 men; age range: 16 to 50) who had received 200 PLVs were evaluated in this study. Median follow-up time was 67.25 weeks with a range of 12 to 72 weeks. Fifteen of the restored teeth were nonvital. while the remaining 185 were vital. Categorical covariates related to the restoration design (localization, vitality, preparation depth, incisal, proximal, and gingival finishings, and surrounding tissue type) were recorded in order to estimate their influence on the survival rates Survival rates of the event-free and overall service duration were calculated with the Kaplan-Meier analysis and Mantel log rank test. Results: Twelve failures were observed. The most frequent failure type (11 units) was debonding of the restoration from the abutment tooth Nine of them were rebonded and the remaining 2 were remade with a different preparation design The last failure was observed as a coronal fracture at the cervical level. The overall survival rates were 99.5%, 99%, 97.5%, 94 9%, 94 4% and 93 8% at weeks 8, 9, 11, 15, 16, and 34, respectively, with a mean estimate of 68.45 weeks. Conclusion: PLVs exhibited good clinical results with their conservative specifications and high survival rates. The preparation and design specifications affect the service duration of PLVs
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    Heightened telescopic copings in cleft palate rehabilitation: A case report
    (Alliance Communications Group Division Allen Press, 2007) Kurtulmus, Huseyin; Saygi, Tugrul; Cotert, H. Serdar
    Objective: To increase retention of overdentures in cleft palate patients by means of heightened telescopic copings with a newly designed attachment. In this study, a "precision attachment" is described to develop the stability and retention of telescopic overdentures. Case: A cleft palate patient was treated with a newly designed overdenture. Intraoral examination revealed poor tooth structure and retention. Therefore, a new semiprecision attachment was designed in order to increase retention and stabilization. Conclusion: The patient's tolerance was increased with the new overdenture.
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    Management of obstructive sleep apnea in an edentulous patient with a combination of mandibular advancement splint and tongue-retaining device: a clinical report
    (Springer Heidelberg, 2009) Kurtulmus, Huseyin; Cotert, H. Serdar
    Treatment of obstructive sleep apnea (OSA) in dentate patients by using mandibular advancement splint (MAS), had been documented in detail. Nevertheless, studies about completely edentulous patients with OSA are sparse. This clinical report describes a clinical and laboratory method for producing a new functional splint combining a MAS and a tongue-retaining device with a custom-made tongue-tip housing and discusses the rationale for using such a device.
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    Management of Obstructive Sleep Apnea with a Mandibular and Tongue Advancement Splint (MTAS) in a Completely Edentulous Patient. A Clinical Report
    (Wiley, 2009) Kurtulmus, Huseyin; Cotert, H. Serdar
    Treatment of obstructive sleep apnea (OSA) in dentate patients using a mandibular advancement splint (MAS) from mandibular repositioners has been documented in detail. Nevertheless, studies about completely edentulous patients with OSA are sparse. This clinical report describes a clinical and laboratory method for producing a functional splint combining an MAS and a tongue-retaining device with an individualized tongue tip housing and discusses the rationale for using such a device.
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    Polydimethyl Siloxane Elastomers in Maxillofacial Prosthetic Use
    (Scrivener Publishing Llc, 2014) Cotert, H. Serdar; Tiwari, A; Soucek, MD
    Despite advances in plastic surgery, there will always be a need for facial prostheses for the patients who exhibit facial defects. Facial prostheses are used to transform congenital, developmental, and acquired defects of the head and neck into natural-appearing reproductions of the missing parts, thus providing an acceptable appearance and improved function. Polydimethyl siloxane elastomers are the materials of choice in the modern maxillofacial prosthetics, with advantages such as flexibility, life-like appearance, good esthetics, ease of coloring, easy manipulation, thin margins and adhesive compatibility. Although widely used, they are far from ideal due to disadvantages such as instability and rapid degradation. Facial defects and their prosthetic rehabilitation by employing polydimethyl siloxane elastomers are discussed in this chapter according to the highlights of the related literature.