Person: ÖZKAN, YASEMİN
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ÖZKAN
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YASEMİN
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Publication Metadata only Evaluation of the efficacy of different treatment modalities for painful temporomandibular disorders(CHURCHILL LIVINGSTONE, 2020) EVREN, BUKET; Abbasgholizadeh, Z. S.; Evren, B.; Ozkan, Y.The purpose of this study was to clinically evaluate the efficacies of three treatment methods and to compare their outcomes in patients with painful disc displacement. The study group comprised 45 patients with unilateral temporomandibular disorders who fell into Axis I group II (with limited mouth opening) of the Research Diagnostic Criteria for Temporomandibular Disorders. Magnetic resonance imaging was used for definitive diagnosis. The patients were divided randomly into three groups according to the treatment method: splint therapy, splint therapy with ultrasound-guided arthrocentesis, and splint therapy with low-level laser therapy. Patients were followed up after treatment for 6 months. The groups were compared in terms of pain and functional jaw movements (unassisted mouth opening without pain, maximum unassisted mouth opening, and contralateral movements). At the end of treatment, functional jaw movements were significantly increased while pain values were significantly decreased in all groups (P < 0.05). Group 2 had a quicker improvement in terms of mouth opening scores at the end of the first month, and unassisted mouth opening without pain was found to be more than 35 millimetres in all groups at the end of 6 months. All treatment modalities showed effective results on pain and functional jaw movements in the treatment of temporomandibular disorders.Publication Metadata only Stud attachments used in tooth-supported overdenture(Springer Nature, 2023-11-01) ÖZKAN, YASEMİN; GÖZNELİ, RİFAT; Özkan Y., Gözneli R.Stud attachments are the most popular and most accessible type of attachments to be used primarily for overdenture among other attachments and available on the market for several decades. Stud attachments are placed directly on the tooth/root or attached (indirectly) to the cast copings for improving both retention and stability. They are straightforward to use and provide reasonable retention and stability for implant overdentures. Also, they are low in profile to reduce leverage upon the retaining abutments, are comfortable for the patient to maintain hygiene, allow independent physiologic movement of abutments, and are easy to repair. Stud attachments may be extraradicular or intraradicular and they may also be classified as resilient and rigid attachments. The resilient attachments permit some vertical and rotational movements on soft tissue for protecting the underlying abutments or implants against overload. Also, the resilient attachments permit vertical movement during mastication, reducing stress transfer to the abutments (stress-breaking function) and transmitting the forces to the residual ridge acting as stress transmitters. However, the resilient attachments usually require space and might cause posterior mandibular resorption with the vertical movement of the denture. On the other hand, the non-resilient (rigid) type does not permit any movement of the overdenture during the function.Publication Open Access Two-body wear of occlusal splint materials against different antagonists(BMC, 2020-12) ÖZKAN, YASEMİN; Yildiz Domanic, Kubra; Aslan, Yilmaz Umut; Ozkan, YaseminBackground This study aimed to demonstrate that the material of the occlusal splint can be chosen according to the needs of individual patients and contribute to the knowledge of the wear rate of these materials. Methods In this study, four occlusal splint materials (Sr Ivocap Heat Cured, Valplast, SR Ivocap Elastomer and Eclipse) and three antagonists (natural tooth enamel, inCoris TZI and IPS e.max Press ceramic materials) were used. Each wear test was performed using a chewing simulator (n = 16; test load: 50 N; number of cycles: 10,000, 20,000 and 30,000; continuous rinsing with water at 30 degrees C for the wet condition). The Shapiro Wilk test was used for normal distribution suitability. Antagonist on average wear quantities both main effects and interactions of material, cycle and condition factors were investigated by Univariate variance analysis. Multiple comparisons were examined using the Games-Howell test. Results There was a statistically significant effect of the difference in materials on the amount of wear (p < 0.001). Furthermore, there was a statistically significant difference among the mean values of all materials (p > 0.001). The highest mean value was obtained with Eclipse (0,318 mu m(3)), and the lowest mean value was obtained with Valplast (0,134 mu m(3)). Conclusion Our study found differences in the in vitro wear rate among various occlusal splint materials.Publication Open Access Comparison of the accuracy of intraoral scanning systems with conventional impression in dentate patient(2020-04-01) ÖZKAN, YASEMİN; Imadettin ALSAYED;Yılmaz Umut ASLANBackground: Over the last years, different intraoral scanningsystems for direct digitalization have been introduced to the dentalmarket. However, the accuracy of these scanners is variable, andlittle information is available. The aim of this in vivo study was tocompare the accuracy of two intraoral scanning systems and thedifference between upper and lower jaw on the accuracy.Methods: 10 patients with full dentition received one conventionalimpression with polyvinyl siloxane (Elite HD+, Zhermack SpA, Italy)and three scans with CEREC OC (Sirona Dental Systems, Sirona,Bensheim, Germany) and Straumann CARES IOS (Intra oralScanner, Basel, Switzerland) for upper and lower jaw. Theconventional impressions were poured and the casts made from itwere scanned and used as the reference model to evaluateprecision and trueness of intraoral scanning virtual modelsprovided by each system. Digital models were analyzed with asoftware (Geomagic Control; Geomagic, Morrisville, USA).Results: The trueness value was 99.88±42.56 μm in upper jaw and82.6±26.81 μm in lower jaw for CEREC OC, and 105.53±25.49 μmin upper jaw, and 109.56±36.84 μm in lower jaw for CARES IOS.The differences between these two systems were not statisticallysignificant (P>0.05), but statistically significant difference wasfound in the precision (P<0.05). CEREC OC showed higher valuein both upper and lower jaws.Conclusion: CEREC OC was more precise than CARES IOS andat a similar level of trueness. No statistically significant differencewas found between upper and lower jaws in both systemsPublication Metadata only Çeneler arası ilişkilerin tespiti(Quintessence Publishing Türkiye, 2021-01-01) ÖZKAN, YASEMİN; GÖZNELİ, RİFAT; TÜRKER, ŞEBNEM BEGÜM; ÖZKAN Y., GÖZNELİ R., TÜRKER Ş. B.; Kulak Özkan, YaseminPublication Metadata only Theoretical and technical background and clinical considerations for tooth-supported overdentures(Springer Nature, 2023-11-01) ÖZKAN, YASEMİN; GÖZNELİ, RİFAT; Özkan Y., Gözneli R.The concept of tooth-supported overdenture (TSO) is a cost-effective and straightforward treatment than the implant-supported overdenture (IOD). When a few remaining teeth are present, they can be retained and used as abutments for a TSO to improve retention and stability. The concept of TSO has some advantages for delaying the process of complete edentulism by preserving the bone structure and preventing bone resorption.Publication Metadata only Gülme estetiğinin analizi ve estetik geçici restorasyonların hastaya sunulması(Quintessence Publishing Türkiye, 2022-01-01) ÖZKAN, YASEMİN; ASLAN, YILMAZ UMUT; ÖZKAN Y., ASLAN Y. U.Publication Open Access Evaluation of laminate veneer preparation depth with 3D systems(2020-04-01) ÖZKAN, YASEMİN; Orhan ÖZTOPRAK;Yılmaz Umut ASLAN;Yasemin KULAK ÖZKANBackground: Preparation depth of laminate veneers are essential inretention and structural integrity of restorations. The aim of this studywas to evaluate the difference between a trained professionalprosthodontist (PP) and a postgraduate prosthodontics student (PPS)in the preparation depth of laminate veneers by scanning the toothwith a 3D scanner before and after the preparation.Methods: Twenty extracted human maxillary central incisors wereevaluated by a PP and PPS. A 0.5 mm depth guide bur was used infor facial reduction and a 1 mm incisal reduction was performed witha deep chamfer. The teeth were scanned with a laser scanner at anaccuracy of 10 µm. The teeth were separated into 3 parts (incisal,middle and cervical) and then 5 points were randomly selected on theunprepared tooth and then lapped over when the preparation hadbeen completed. The data of the difference was calculated in 3Dscanning software Magics (Materialise NV, Belgium). Statisticalanalysis were performed with one-way ANOVA (p < 0.05).Results: PP results showed mean values in the Incisal of0.328+0.045 mm, Middle of 0.375+0.097 mm and Cervical of0.471+0.07 mm. PPS results showed mean values in the Incisal of0.323+0.056 mm, Middle results of 0.403+0.083 mm and Cervicalresults of 0.462+0.075 mm.Conclusion: These results suggest that a PP or a PPS can bothachieve the same precision in the preparation using a depth guidebur.Publication Metadata only Diş hekimliğinde materyal seçimi ve üretim metotları(Ouintessence Publishing Türkiye, 2022-01-01) AKMANSOY, ŞÜKRÜ CAN; ŞANIVAR ABBASGHOLIZADEH, ZELİHA; ÖZKAN, YASEMİN; Akmansoy Ş. C., Şanıvar Abbasgholızadeh Z., Özkan Y. (Editör)Publication Metadata only Diş Hekimliğinde Renk Seçimi(Ouintessence Publishing Türkiye, 2022-05-01) AKMANSOY, ŞÜKRÜ CAN; ÖZKAN, YASEMİN; ŞANIVAR ABBASGHOLIZADEH, ZELİHA; Akmansoy Ş. C. , Şanıvar Abbasgholızadeh Z., Özkan Y.