Publications by authors named "Ozgur Karakoyun"

Purpose: This study aimed to evaluate the mid-term radiological and clinical results of gradual lengthening of capitate for the treatment of stage IIIA Kienbock's disease.

Methods: We retrospectively reviewed nine patients (five females, four males) with Lichtman stage IIIA Kienbock's disease who underwent gradual capitate lengthening at our hospital. Their clinical (range of motion (ROM), grip strength, visual analogue scale (VAS) value for pain, and Mayo wrist score (MWS)) and radiological outcomes (in terms of progression of arthritis and carpal height ratio) at the last follow-up were compared to the preoperative values.

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Purpose: This study presents the technique and results of acute correction of distal femoral deformities using retrograde femoral nailing based on preoperative planning without using a fixator.

Methods: Twenty-eight patients (34 limbs: 22 left-sided, 12 right-sided, mean age = 36 years) undergoing distal femoral deformity correction with retrograde femoral nailing between 2013 and 2020 were examined retrospectively. The osteotomy line, block screw location and number were identified by detailed preoperative planning.

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The Precice nail is used to treat limb length discrepancies and has a low complication rate and a high patient satisfaction rate. While the Precice nail can be used for lengthening, unlike other lengthening nails, it can also be used for shortening. We report a 37-year-old female patient with a 14 cm limb length discrepancy that was treated with a new surgical technique using the shortening feature of the Precice nail.

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Introduction: It is critical to achieve both proper component positioning and intact muscle balance if satisfactory results are to be attained after total hip replacement (THR). There have been fewer studies on minimally invasive (MI) THR than standard approaches. The objective of this paper is to present the early clinical and radiological results of posterolateral MI THR.

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Purpose: To report our experience with the PRECICE nail for limb lengthening in 23 patients.

Methods: Records of 15 female and 8 male patients aged 14 to 38 (mean, 23.6) years who underwent lengthening of the tibia (n=6) or femur (n=21) using the PRECICE nail were reviewed.

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Purpose: To evaluate changes in blood circulation of the femoral cortex in rabbits using scintigraphy before and after cable cerclage alone or combined with an intramedullary Kirschner wire.

Method: Ten New Zealand rabbits were used. For the right femur, a 2-mm-thick cable was placed around the mid-diaphyseal region and squeezed with a 400-N force and locked with a clip.

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Background: A focal full thickness cartilage lesion of knee joint is one of the commonly seen intraarticular pathologies among the joint cartilage problems. Osteochondral autograft transfer mosaicplasty is a method which has satisfactory outcomes among the treatment preferences of cartilage defects. In spite of the favorable clinical results there are some pitfalls of mosaicplasty treatment especially in cases of large defects.

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Background: Developed for the treatment of deformity correction, computer-assisted circular external fixators in recent years have also been used for fracture fixation. In this study, we aimed to present the efficacy of computer-assisted circular external fixator use in open long bone fractures with our new technique.

Methods: Between February 2013 and June 2014, 14 patients (mean age 24.

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Background: Lengthening nails have been used to correct limb length discrepancy caused by different etiologies, as well as for post-traumatic reasons. Two important lengthening nail-related complications are damage to the distraction mechanism and femoral fractures around the nail tip. As a result of the curved anatomy of the femur, straight nails impinge on the anterior cortex.

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Objective: Lengthening after acute correction has a negative effect on bone healing during distraction osteogenesis. In this study, we investigated whether correcting an acute deformity prior to lengthening resulted in a negative effect on bone healing.

Methods: Patients with shortened femora were assigned to 3 matched groups.

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Background: This study reports our results with retrograde Fitbone insertion in patients with femoral shortening and deformity. We also present our experience regarding the benefits, complications, and factors associated with complications of the Fitbone technique.

Methods: Twelve males and ten females had femoral shortening and deformities treated using the retrograde Fitbone technique between 2009 and 2012.

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Objective: The aim of this study was to report the clinical and radiological results of patients with Intramedullary Skeletal Kinetic Distractor (ISKD) lengthening.

Methods: Ten femoral and 2 tibial lengthening were performed in 12 patients (7 male, 5 female; mean age: 27 years (13-40)) by using ISKD nail. The mean limb length discrepancy of the patients was 4.

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Objective: The aim of this study was to determine whether the Taylor spatial frame (TSF) can precisely correct deformities around the knee and whether application of TSF is easy and safe for treatment of the deformities around the knee.

Methods: This study included 50 retrospectively reviewed limbs of 37 patients (mean age: 23 years, range: 10 to 58 years) with deformity around the knee joint treated using the TSF. Thirty-three limbs had tibial and 17 femoral deformities.

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The technique of lengthening over an antegrade nail is used widely for distraction osteogenesis of the femur. Most reported complications of this technique are related to Schanz pins. We hypothesized that reducing the number of Schanz pins would enable successful distraction with fewer complications.

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Objectives: This study aims to identify the bone mineral density (BMD) values and the prevalence of osteoporosis (OP) in Turkish women living in Kastamonu within the purpose of contributing to Turkish database and to explore whether the characteristics of the regional climate and demographics in different provinces of Turkey are risk factors, comparing our results with similar studies.

Patients And Methods: Between January 2009 and December 2011, 778 of 2018 subjects who were admitted to the healthcare centers equipped with dual energy X-ray absorptiometry (DXA) device in Kastamonu and met the inclusion criteria were included. The results of BMD were compared with the studies performed by Lunar DXA in two different provinces.

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The Taylor Spatial Frame uses a computer program-based six-axis deformity analysis. However, there is often a residual deformity after the initial correction, especially in deformities with a rotational component. This problem can be resolved by recalculating the parameters and inputting all new deformity and mounting parameters.

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Objectives: We evaluated the effectiveness of the Taylor spatial frame (Smith & Nephew, Memphis, TN, USA) in the treatment of complex lower extremity deformities.

Methods: The Taylor spatial frame (TSF) was applied to 29 bone segments of 25 patients (12 females, 13 males; mean age 17 years). Indications for the TSF were congenital disorders (n=12), rickets (n=6), physeal injuries (n=4), stiff nonunions (n=3), malunions (n=3), and sequela from septic arthritis of the knee (n=1).

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