Person: ÖZKAN, YAŞAR
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ÖZKAN
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YAŞAR
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Publication Metadata only The effect of different attachment systems with implant-retained overdentures on maximum bite force and EMG(WILEY, 2012) ÖZKAN, YASEMİN; Ucankale, Mert; Akoglu, Burcin; Ozkan, Yasar; Ozkan, Yasemin KulakObjective: To compare the effect of different attachment systems with implant-retained overdentures on maximum bite force and muscle activity using electromyography (EMG). Background: Denture retention and stability is of considerable interest in prosthetic dentistry. Materials and methods: Thirty-five patients were examined: 15 edentulous patients treated with mandibular implant-retained overdentures (MIRO) and maxillary dentures (MCD) (two implant-ball attachment) (BC); 10 edentulous patients treated with MIRO and MCD (four implants-bar attachments) (BRC); 10 patients with edentulous mandibular treated with MIRO and maxillary fixed partial dentures (MFPD) (two implant-ball attachments) (BF). Before implant placement all patients received new dentures. After using these dentures for 3 months the maximum bite force and electrical activity of masseter muscle were measured. Two or four implants were then inserted into the intraforaminal region. After osseointegration periods, patients were treated with MIRO which duplicated their dentures and after three months the measurements were repeated. The data were collected and statistically analysed. Results: Muscle activity and chewing ability increased in the second period of measurements. Also chewing time was significantly decreased at the first measurements. The highest muscle activity was observed in the group of patients treated with group BF. Conclusion: The EMG values of the masseter muscle significantly increased when an implant attachments was used in the overdenture.Publication Metadata only Three-year treatment outcomes with three brands of implants placed in the posterior maxilla and mandible of partially edentulous patients(MOSBY-ELSEVIER, 2007) ÖZKAN, YASEMİN; Ozkan, Yasar; Ozcan, Mutlu; Akoglu, Burcin; Ucankale, Mert; Kulak-Ozkan, YaseminStatement of problem. Survival rates of implants in posterior regions vary among clinical studies. Problems occur more often in the posterior segment of the maxilla due to proximity of the maxillary sinus and reduced quality or quantity of alveolar bone. Purpose. This clinical study evaluated the treatment outcomes of 3 brands of implants in the posterior maxillac and mandibles of 63 patients. Treatment outcomes of all implants were assessed according to implant type, location, patient gender, periodontal status, and prosthesis type. Material and methods. A total of 203 implants - 105 ITT (ITT), 53 Camlog (CAM), and 45 Frialit (FRI) - were placed in 63 patients (38 women, 25 men). One hundred twelve implants were located in the posterior mandible and 91 in the posterior maxilla. All implants were longer than 10 mm and had a diameter larger than 3.5 mm. Implants in the ITT group were placed in a 1-stagc surgery. The CAM and FRI groups were treated with a 2-stage surgical protocol. Implants were not loaded until osseointegration was complete, which was determined clinically and radiographically. At that point, implants were restored with 50 single crowns and 81 fixed partial dentures (FPDs). While 11 FPDs connected implants to natural teeth, 70 FPDs were supported by implants only. Standardized radiographs were made, and clinical parameters were recorded at prosthesis insertion (baseline) and at each recall evaluation (6, 12, 24, and 36 months). Plaque index (PT), sulcus bleeding index (SBI), peri-implant probing depth (PD), and radiographic marginal bone loss (MBL) levels were recorded at baseline, along with any biological and mechanical complications. Repeated-measures ANOVA, Kruskal-Wallis test, Wilcoxon signed rank test, and paired samples tests were used for statistical analysis (alpha = .05). Results. One implant was lost during the osseointegration period in I woman due to infection. The cumulative implant treatment outcome was 99.3%. At the 3-year recall, plaque accumulation was significantly higher than baseline scores (P = .01, Wilcoxon signed rank test). Eight percent of the patients presented >2 mm PD at 2-year recall. The influence of observation time was found to be significant for the mean MBL values between groups (P = .001). When MBL values were compared between groups, no significant differences were found. For I patient in the FRI group, abutment loosening was observed and both the crown and the abutment were replaced. Patient satisfaction in all groups was high. Conclusion. The 3 brands of implants evaluated in this study exhibited similar positive treatment outcomes after 3 years.Publication Metadata only Retrospective Evaluation of Root End Resection without Retrograde Filling(AVES PRESS LTD, 2018) GÖÇMEN, GÖKHAN; Gocmen, Gokhan; Ozkan, YasarObjective: The aim of the present study was to investigate the outcomes of cases completed without retrograde filling following root end resection made for periapical pathology. Methods: This was a retrospective cohort study. The primary predictor variables included gender, age (>45 vs <45 years), and localization (maxilla, mandible, anterior, and posterior). The primary outcome variable was radiological assessment (success vs failure). Data were analyzed by chi-square test and descriptive statistics (p<0.05). Results: A total of 56 (21 males and 35 females) patients were included in the study. Overall, 37 (66%) patients were successful, whereas 19 (34%) failed. Gender, age, and localization did not significantly affect the outcomes. There were significantly less successful outcomes in the posterior dentition (p<0.05). Conclusion: It cannot be reported that retrograde filling after root end resection is unnecessary; however, successful outcomes might be obtained without retrograde filling.Publication Metadata only Facial harmony after orthognatic surgery in patients with laterognati (case series)(2023-11-10) BAYRAM, FERİT; ÖZKAN, YAŞAR; Fattahzade S., İzmirli Evrenol B., Bayram F., Özkan Y.Objective: Providing ideal aesthetics and function in cases with dentofacial deformity and laterognathism is quite complex. Mostly in Class III patients, lower incisors tend to tip lingually and maxillary incisors labially to compansate the occlusion. With addition of laterognathism, improving the occlusal relation, chewing function and profile aesthetics gets even more challenging. For such adult patient cases, orthognathic bilateral sagittal split osteotomy can be used to reposition the jaws to their ideal locations, but it is crucial to take into consideration the patient’s post op occlusal functions and stability, profile and facial appearance preferences during the treatment planning. To achieve the ideal results, you need to plan in a multidiciplinary aspect, patients need to go under orthodontic decompansation treatment to have their ideal dental positions in the alveolar bone. In this case series, we aim to emphasize the importance of the collaboration between orthodontics and surgery in patients with laterognathism and facial disharmony. Materials-Method: In this study three high angle Class III patients with 1-4 mm of mandibular deviation were selected. To correct the angulation and alignment of the teeth first; before the surgery they had an orthodontic treatment; so, after the surgery, it would be easier to have stable occlusion. The patients underwent bilateral sagital split osteotomy. The orthognathic surgery performed by the Department of Oral and Maxillofacial Surgery at Marmara University Faculty of Dentistry between 2019 and 2022. Digital planning was initially conducted for our patients, and the expected outcomes and facial changes were communicated to them. Subsequently, the surgeries were performed according to the planned adjustments and the splints created for each patient, and aesthetic changes after surgery were evaluated. Conclusion: The results showed that good occlusal relation, and sufficient alveolar bone support was present around the teeth, dental inclinations, soft tissue profile and overall an aesthetic improvement was achieved as planned. This study shows with a multidisiplinary approach and a up to date technological planning, we can predict more precisley our treatment results to increase the aesthetic and functional quality for our patients. To further validate our results, it is necessary to increase the number of patients and conduct clinical trials with longer follow-up periods.Publication Open Access Does shelf preparation have efficacy on immediate loading of 4 implants supporting screw-retained full-arch dental prosthesis(2022-07-01) GÖÇMEN, GÖKHAN; ÖZKAN, YAŞAR; ASLAN Ü., GÖÇMEN G., ÖZKAN Y., ÖZKAN Y.© 2022 Wolters Kluwer Medknow Publications. All rights reserved.Background: Bone reduction and shelf preparation is a common procedure to establish a new alveolar plane before implant surgery, which might effect the primary stability. Aim: Primary stability was questioned in terms of bone reduction and shelf preparation. The suitability of immediate loading was compared between the implants placed on crests, which underwent alveoloplasty, and the implants placed on a naturally healed alveolar bone. Patients and Methods: We designed and implemented a retrospective cohort study. Twenty patients (mean age 49.2 years) were treated with 160 dental implants. The primary predictor variable was extraction and bone reduction. The secondary predictor variables were bone density and the implant surface. The outcome variables were resonance frequency analysis (RFA) and insertion torque (IT) values. Results: There was no statistically significant difference between groups regarding RFA and IT (P > 0,05). Interactions of surface area with the RFA and IT in both groups were not statistically significant; however, bone density presented a statistically significant effect on outcome variables for both groups. Conclusion: IT and RFA are not influenced by bone reduction, shelf preparation, or the implant surface. Primary stability is mostly affected by bone density in the immediate load of 4 implants to support a full-arch prosthesis.Publication Open Access Atypical presentation of medication-related osteonecrosis of the jaw in a young male patient undergoing chemotherapy for acute lymphoblastic leukemia(2023-12-01) ÖZKAN, YAŞAR; BAYRAM, FERİT; Bayram F., Fattahzade S., Uzay A., Özkan Y.This case report aims to highlight the importance of close oral monitoring before and during chemotherapy in patients with B-cell acute lymphoblastic leukemia (B-ALL) to prevent medication-related osteonecrosis of the jaw (MRONJ). A 22-year-old male patient diagnosed with B-ALL who developed MRONJ during chemotherapy, despite not receiving bisphosphonates or denosumab, was presented. The patient\"s medical history, treatment regimen, clinical examination findings, and treatment outcomes were reported. The patient developed maxillofacial cellulitis during chemotherapy, leading to a diagnosis of stage 3 MRONJ. Conservative treatment was initiated, resulting in the reversion of the disease to stage 1 and stabilization of the progression. The patient achieved remission and underwent prophylactic cranial radiotherapy. This case report presents a unique case of MRONJ in a young patient without prior use of antiresorptive agents or denosumab. It highlights the need for close oral monitoring in patients with B-ALL before and during chemotherapy, as MRONJ can develop in the absence of these medications.Publication Metadata only Comparison of the Efficacy of Local Infiltration and Mandibular Block Anesthesia With Articaine for Harvesting Ramus Grafts(W B SAUNDERS CO-ELSEVIER INC, 2016) GÖÇMEN, GÖKHAN; Gocmen, Gokhan; Ozkan, YasarPurpose: We compared the efficacy of local infiltrative anesthesia and regional mandibular block anesthesia using articaine to harvest ramus grafts and the postoperative sequelae. Materials and Methods: A total of 20 patients with alveolar bone deficiency participated in the present comparative, prospective, randomized study. The first group received regional anesthesia with the mandibular block technique (group A; n = 10), and those in the second group received local infiltration anesthesia (group B; n = 10). Intraoperative pain and bleeding were evaluated as the primary outcome variables. The visual analog scale (VAS) scores were compared at 0.5, 1, 2, and 4 hours postoperatively. The maximal interincisal mouth opening (MIO) (on days 3 and 7) and VAS scores (at 6, 12, 24, and 48 hours and on days 3 and 7) were compared as secondary outcome variables. The correlation between pain (VAS scores) and trismus (MIO) were also compared. Results: A painless procedure was performed in both groups. The VAS score, MIO, and intraoperative bleeding were not significantly different between the 2 groups. Paresthesia was not observed in either group postoperatively. No statistically significant correlations were found between the VAS scores and MIO. Conclusions: Local infiltrative anesthesia preserves almost the same depth of anesthesia as mandibular block anesthesia. No differences were found between these techniques in terms of efficacy and postoperative sequelae during and after ramus graft harvest. Thus, using articaine with a local infiltration technique is an alternative to mandibular block anesthesia during ramus graft harvesting and results in a reduced risk of inferior alveolar nerve damage. (C) 2016 American Association of Oral and Maxillofacial Surgeons.Publication Metadata only General health, dental status and perceived dental treatment needs of an elderly population in Istanbul(WILEY, 2011) ÖZKAN, YASEMİN; Ozkan, Yasar; Oezcan, Mutlu; Kulak, Yasemin; Kazazoglu, Ender; Arikan, AylaBackground: Comprehensive data on the oral health status and dental treatment needs of the elderly population in Turkey are deficient. Objectives: This pilot study determined the general and dental health status, perceived medical and dental treatment needs of an elderly population dwelling in residential homes in Istanbul. Method: Subjects at three different residential homes, namely one belonging to the state and two supported by foundations in Istanbul (N=121, female: 63 and male: 58) were involved in this study. A detailed questionnaire was prepared and dental examinations were conducted. Information was collected related to age, education levels, financial status, current physical functional status, general health, mental health, previous dental history, current dental status, oral hygiene practices and denture hygiene of these elderly people. The prevalence of edentulism, the presence and type of dental prostheses, dental and denture status and denture cleanliness were further evaluated. Results: The three most prevalent reported general health problems were associated with genito-urinary problems (24%) followed by cardiovascular (18%) and respiratory problems (14%) varying significantly between genders, with males suffering more from cardiovascular problems than females (p < 0.05). Females showed significantly higher gastrointestinal and orthopaedic problems than males (p < 0.05). Females were more frequently edentulous than males but denture hygiene was significantly better in females than in males (p < 0.05). Brushing frequency did not significantly increase denture hygiene (p = 0.6). More than one-third of the subjects had not been to the dentist within the previous 5-10 years, mainly due to lack of demand, followed by the cost of the dental care and fear. More than two-thirds of denture-wearing subjects wore their dentures only during eating. Conclusions: There was significant perceived dental treatment and care need for the sample population of elderly studied.Publication Metadata only Retrospective Analysis of Prosthetic Complications of Implant-Supported Fixed Partial Dentures After an Observation Period of 5 to 10 Years(QUINTESSENCE PUBLISHING CO INC, 2013) ÖZKAN, YASEMİN; Vanlioglu, Burcin; Ozkan, Yasar; Kulak-Ozkan, YaseminPurpose: The purpose of this study was to evaluate the incidence of the most common technical problems with implant-supported fixed partial dentures (FPDs) and to assess the survival and success rates (event-free survival) after 5 to 10 years of function. Materials and Methods: All of the implants evaluated in this study were from a single manufacturer (Institut Straumann). Follow-up examinations were scheduled 1 week after suprastructure placement, 6 months later, and annually thereafter. Prosthesis-based data on survival/failure rates and technical complications were analyzed. Results: In 95 partially edentulous patients, 231 Straumann implants were placed and restored with 177 implant-supported prostheses (125 single crowns, 18 splinted crowns on two adjacent implants, and 34 three-unit FPDs). One hundred thirty-one solid abutments and 100 synOcta abutments were inserted. The survival rate of prostheses supported by implants was 97.7%. The prosthetic success rate (event-free survival) was 96.05%. After an observation period of 5 years, the cumulative incidence of screw loosening was 0%. Fracture of the veneering porcelain occurred in 3.95% of all restorations. Fractures of the superstructure framework were not observed. The overall incidence of complications after 5 years was highest for splinted crowns, which showed the lowest success rate (94.4%), followed by three-unit FPDs (96%) and single crowns (98.4%). Conclusions: Single-unit restorations or short-span FPDs supported by both synOcta and solid abutments on Straumann implants showed low rates of technical complications, the most common being fracture of the veneering porcelain.Publication Metadata only The effect of antihypertensive drugs on dental implant stability(2023-05-12) BAYRAM, FERİT; ÖZKAN, YAŞAR; Öztürk B., Bayram F., Özkan Y.