Mustafa Akkaya

Ankara Güven Hospital · Department of Orthopedics

Acetabular revision arthroplasty, a demanding field of reconstructive hip surgery, calls for innovative strategies to deal with challenging bone defects and implant failure seen in revision cases. Conventional implant solutions might fall short of adequately addressing severe bone loss and ensuring stable fixation, highlighting the necessity of cus...

Citation: Coskun, B.; Ayhan, M.; Bozer, M.; Ozaslan, H.I.; Dogan, M.; Citak, M.; Akkaya, M. What Is the Rate of Antimicrobial Resistance of a Prosthetic Joint Infection in a Major Orthopaedic Centre? Antibiotics 2024, 13, 306. https://doi. Abstract: Periprosthetic joint infections (PJIs) are important factors in decreasing the success of hip and kn...

Trunnionosis is widely known as a possible cause of failure following total hip arthroplasty (THA). Although factors such as mechanical stress, corrosion and specific implant designs may contribute to the development of trunnionosis, the actual cause of the condition remains still unknown. Orthopedic surgeons have become more aware of trunnion fail...

Background: Surgeons still face difficulties when performing aseptic acetabular revision on patients with extensive defects. Advances in three-dimensional printing technology (3DP) have afforded to the surgeons to create a patient-specific implant matching the morphology and topography of the defect. Objective: The aim of the current research wa...

Backround: Periprosthetic joint infection (PJI) is a very important complication that occurs after total joint replacement. Diagnosing PJI is at least as difficult as this disease. There is no biomarker that alone can diagnose PJI. Objective: This study aimed to evaluate the effectiveness of large unstained cell percentage (%LUC) in diagnosing P...

Different anatomical variants have been reported for the proximal and distal femur. Given this context, the goal of our study was to answer the following question: Can we also identify different anatomical variants of the proximal humerus? Two hundred anteroposterior (AP) radiographs of the proximal humerus with an equal gender distribution and equ...

The accuracy of preoperative synovial fluid microbe detection in periprosthetic joint infection (PJI) is widely reported. However, the reliability of this diagnostic modality amongst the different joints is not yet described. We aimed to compare the concordance rate between preoperative synovial fluid and intraoperative tissue cultures in shoulder,...

Purpose Hepatitis B and C are important and relatively common health issues. It is known that many patients who underwent total knee and hip arthroplasty were also diagnosed with hepatitis. These patients are at higher risk of periprosthetic joint infection (PJI). This study aimed to investigate the differences in PJI cases in hepatitis B and C pat...

Background There are no definitive anatomic morphometric risk factors for adolescent anterior cruciate ligament (ACL) injury. Purpose To compare the parameters used to define the tibial and femoral morphometric structure of the knee between adolescent patients with and without ACL rupture. Study Design Cross-sectional study; Level of evidence, 3....

To show the effects of tranexamic acid, which is a drug frequently used to control bleeding, on the hip joint and sciatic nerve in animal experiments. There were 15 rats in each of the 3 groups, with a total of 45 rats. Topical saline injections were applied to the first group, topical TXA injections to the second group, and intravenous (IV) TXA in...

In this study, the effects of tranexamic acid (TXA) on the knee’s articular cartilage, anterior cruciate ligament (ACL), and joint capsule were assessed histologically. There were 15 rats in each of the 3 groups, totaling 45 rats. Intraarticular (IA) saline injections were applied for the first group, IA TXA injections for the second group, and int...

This study aims to assess whether the nationwide newborn ultrasonographic hip screening program has influenced the rate of different types of surgical interventions performed in developmental dysplasia of the hip (DDH) in children in Turkey. A retrospective analysis of the nationwide data obtained from the National Registry System between January 1...

IntroductionTibial slope is a parameter that is important to recognize in knee kinematics and knee surgery. A very wide range of values governing posterior tibial slope exist in the literature. This study is based on the hypothesis that age, gender and region may have an effect on the tibial slope.Materials and methodsA total of 1800 lateral knee r...

Objectives: This study aims to investigate the patient profile at a medium-volume hospital located in the earthquake zone among patients who received orthopedic treatment within the first five days after the natural disaster that was considered a major earthquake. Patients and methods: Between February 6th, 2023 and February 10th, 2023, a total...

Background The etiology of rotator cuff tears (RCTs) have been investigated for years and many underlying causes have been identified. Shoulder joint morphology is one of the extrinsic causes of RCTs. Aim Morphometric measurements on MRI sections determined which parameters are an important indicator of RCT in patients with shoulder pain. The aim...

The accurate positioning of the prosthetic components is essential for achieving successful results in medial unicompartmental knee arthroplasty (mUKA). The tibial component rotation in image-based robotic-assisted UKA is usually based on tibial bony landmarks matched to the pre- operative CT model. The study aimed to evaluate whether setting the t...

Purpose The aim of this study was to assess the difference in success rates of closed reduction in septic and aseptic revision total hip arthroplasty (THA) performed with a dual mobility (DM) implant. Our objective was to answer the following questions: (1) Is there a difference in success rates of closed reduction between septic and aseptic revisi...

Purpose In the case of stemmed implants for lower limb joint arthroplasty procedures, implant stability and survivorship generally rely on the strength of fixation in the medullary canal regardless of whether the procedure is primary or revision surgery. This study aimed to investigate the relationship between the proximal (Dorr classification) and...

Background: Periprosthetic joint infection (PJI), the most common cause of revision after TKA and THA, is a devastating complication for patients that is difficult to diagnose and treat. An increase in the number of patients with multiple joint arthroplasties in the same extremity will result in an increased risk of ipsilateral PJI. However, there...

Aims Despite numerous studies focusing on periprosthetic joint infections (PJIs), there are no robust data on the risk factors and timing of metachronous infections. Metachronous PJIs are PJIs that can arise in the same or other artificial joints after a period of time, in patients who have previously had PJI. Methods Between January 2010 and Dece...

Introduction Risk factors (RF) associated with aseptic loosening (AL) in total knee arthroplasty (TKA) are poorly understood. Therefore, the aim of this study was to investigate the anatomical shape variations in relation to the inner-diameter of the femur and the tibia as prognostic RF for AL of full hinge prosthesis (FHP) in primary and revision...

Aim: Many different methods have been described in the treatment of distal radius fractures (DRF) in the elderly population, and which one is the better method is a matter of debate among orthopedic surgeons. The aim of this study was to compare the results of closed reduction and plastering (CRP) and volar locking plate (VLP), which are used in th...

Purpose: Management of pediatric subtrochanteric femur fractures (SFFs) is difficult. The aim of this study was to evaluate the outcomes of adolescent SFFs treated with adult proximal humeral locking plates (PHLPs). Materials and methods: A retrospective analysis of 18 adolescents (11 male, 7 female) with a diagnosis of SFF who underwent interna...

Periprosthetic joint infection (PJI) is one of the most serious complications after joint arthroplasty. The incidence rate of PJI after total joint replacement is 1–3%. Although there are different guidelines and diagnostic criteria used to diagnose PJI, diagnosing PJI is a highly difficult process for orthopedists. The current Musculoskeletal Infe...

Introduction The accuracy of preoperative synovial fluid culture for microbe detection in shoulder periprosthetic joint infection (PJI) is poorly described. To evaluate the utility of preoperative culture data for early pathogen identification for shoulder PJI, we determined the concordance between preoperative synovial fluid culture results and in...

Purpose The use of short-stemmed femoral components with preservation of the femoral neck has been advocated for younger and more active patients undergoing joint replacement. This study reports the long-term outcomes of the Collum Femoris-Preserving (CFP) prosthesis on a previous report. Methods Between January 1999 and December 2000, a total of...

In this study, we present a case of aneurysmal bone cyst presenting as pathologic fracture of the left proximal femur. The patient, who had history of multiple surgeries, was referred to us with a giant mass. The patient was found to develop osteosarcoma without radiation exposure. External hemipelvectomy was performed. Appropriate surgical managem...

INTRODUCTION: Musculoskeletal injury is a public health concern that substantially increases the workload of emergency healthcare providers and hospitals in developing countries. Successful management of the diagnosis and treatment processes reduces healthcare costs and shortens the duration of preventable disabilities in patients with musculoskele...

Purpose: Acromegaly is a rare and chronic hormonal disorder. Persons with acromegaly frequently live well into adulthood. Patients with active acromegaly have multiple joint-related issues; however, acromegalic arthropathy (AA), which is secondary osteoarthritis (OA), is considered one of the most common musculoskeletal complications of acromegaly...

Background: This study was performed to answer the question: Is the risk of PJI in patients undergoing primary TKA and THA in multi-unit OR higher than in a classical single-unit OR? We hypothesized that the risk of PJI following TKA and THA is not associated with the OR type. Methods: We reviewed the medical records of all cases of THA and TKA...

Objectives: This study aims to analyze the in-hospital complication rates in patients with human immunodeficiency virus (HIV) following primary total knee (TKA) and total hip arthroplasty (THA). Patients and methods: This retrospective study included a total of 37 patients including 11 patients undergoing TKA (11 males; mean age: 60.8±16.0 years...

Update This article was updated on June 17, 2022 because of a previous error. On page 33, in the section entitled “17 - Does administration of tranexamic acid (TXA) to patients undergoing orthopaedic procedures increase the risk of subsequent VTE?”, and in the note on page 161, the name “Armin Arish” now reads “Armin Arshi.” An erratum has been pub...

Knee osteochondral fractures are one of the most common orthopedic injuries and their diagnosis and treatment is always open to debate among orthopedic surgeons. In this case report, we described the surgical treatment and two years follow-up of an adult male patient, who underwent delayed osteochondral fixation with an iliac graft. A medial parapa...

PurposeRe-operation after septic failure of a one-stage exchange for prosthetic joint infection (PJI) of the knee is a highly challenging procedure with concerns over residual bone stock, soft tissues, and stability. The associated changes in microbiology in cases of reinfection are still largely unknown.MethodsA comprehensive analysis was performe...

Purpose Aseptic loosening (AL) is the second most common reason for failure after one-stage septic knee revision. In this context, the goal of the study is to identify risk factors for AL following one-stage septic knee revision using rotating hinge implants. We aimed to answer the following research question: How does the anatomical shape of the d...

Amaç: Acil sağlık hizmetlerinin kesintisiz ve hızlı bir şekilde sunulması hastaların ilk müdahalelerinin en kısa sürede yapılabilmesi için hayati önem taşımaktadır. Bu çalışmada Ankara 112 İl Ambulans Servisi’nin son beş yıl içindeki faaliyetleri ve olaya müdahale sürelerini ayrıca 112 çağrı merkezine yapılan başvuruların incelenmesi amaçlanmıştır....

Background The stability of the syndesmosis is extremely important in terms of syndesmosis injury, ankle instability, and posttraumatic osteoarthritis development following ankle fractures. The aim of this study is to evaluate 1-year radiographic outcomes after posterior malleolar fixation in lateral and posterior malleolar fractures and trimalleol...

Objective Aseptic loosening (AL) is among the most important causes of failure after total knee arthroplasty (TKA). However, while there are numerous underlying causes of AL, the morphometry of the distal femur and intramedullary canal has not been sufficiently demonstrated. This study aimed to show the interobserver and intraobserver reliability a...

PurposeDespite good clinical outcomes and a high success rate, there is a comparatively high mortality after one stage septic exchange of total hip arthroplasty. The aim of this study was to identify risk factors for mortality in the hospitalization period after one-stage septic exchange of THA.Methods We retrospectively analyzed in our database al...

Normal arthroscopic anatomy should be well known for an adequate and effective surgical intervention for successful results in surgery. Successful differentiation of normal tissue and pathological tissue is the first step of arthroscopic surgery. In this context, the arthroscopic anatomy of the knee joint is essential for knee arthroscopy which is...

Knee arthroscopy is performed increasingly every day and constitutes an important place among the orthopedic surgical procedures. Significant improvement has been achieved in evaluating the compartments and treatment procedures with the increase in technical possibilities. However, posterior compartment of the knee, which is referred to as the “bli...

Problems related to the meniscus, which has an extremely important place in lower extremity functions, are being seen at increasing rates with the current rates of sporting activities and intense working tempo. The leading problem is meniscus tears, and these create loss of workforce and a serious impairment to quality of life. Several different tr...

There is currently an increasing incidence of anterior cruciate ligament (ACL) rupture associated with changes in lifestyle and increasing sports activities. Related to this, together with the increase in primary ACL surgeries, it has been observed that there is an increase in the number of revision operations. When this is looked at from a socioec...

This study aimed to investigate whether overhang or underhang around the tibial component that occurs during the placement of tibial baseplates was affected by different slope angles of the tibial plateau and determine the changes in the lateral and medial plateau diameters while changing the slope angle in total knee arthroplasty. Three-dimensiona...

PurposeThis study aimed to determine the magnitude of local curvature matching in the sagittal plane between an implanted graft and the condylar region receiving the graft and to analyze its effect on clinical outcomes in patients undergoing osteochondral allograft transplantation (OCA).Methods Patients who underwent knee OCA between 2016 and 2019...

Purpose: This study aimed to assess the impact of biodegradable polyurethane meniscus scaffold implantation (BPMSI) on muscle strength and balance in comparison with the healthy contralateral knee in patients with irreparable medial meniscus defect. Methods: This observational and prospective case-cohort study was conducted with patients who had...

PurposeTo determine the component fit by radiography or computed tomography after total knee arthroplasty and the relation of imaging with clinical examination of residual knee pain.Methods The study was conducted in 172 patients with residual knee pain after total knee arthroplasty. The patients were examined to determine whether they experienced...

The objective of this study is to show the short-term clinical and radiological outcomes of concentrated bone marrow aspirate (CBMA) injection administered in combination with medial meniscus scaffold implantation. Twenty-three patients who received intra-articular CBMA injection in combination with polyurethane-based medial meniscus scaffold impla...

Background: Chondral injury is a common problem around the world. Currently, there are several treatment strategies for these types of injuries. The possible complications and problems associated with conventional techniques lead us to investigate a minimally invasive and biotechnological alternative treatment. Combining tissue-engineering and mic...

Aim: A limited healing response to focal cartilage lesions is frequently encountered in the clinical cartilage pathology. This study compares the gene expression patterns of damaged and undamaged regions of cartilage obtained from the same patient with focal cartilage lesions. The aim of this study is to provide new genes and proteins, which may be...

Background This study aimed to evaluate the effect of total hip arthroplasty (THA) on sagittal pelvic parameters and to evaluate the effect of sagittal pelvic parameters on acetabular cup orientation. Methods The study included 86 patients who underwent THA for a diagnosis of unilateral coxarthrosis between 2011 and 2015. Measurements were taken o...

Background: Studies on prosthesis positioning and implant design in total hip arthroplasty (THA) have generally focused on the anatomy of the proximal femur in the coronal plane. The aim of this study was to investigate the proximal femur morphology in the sagittal plane to provide better positioning of the femoral component in THA and contribute...

Background: Osteoarthritis (OA) of the knee is a very common musculoskeletal disorder. Although total knee replacement is a suitable option in the treatment of severe OA, it has some limitations when performed in the early stage and early age. Bone marrow aspirate concentrate (BMAC), which is rich in mesenchymal stem cells, is promising due to its...

Purpose Dislocation is an important complication that increases the mortality, morbidity, and postoperative care following bipolar hemiarthroplasty. It is thought that the transtrochanteric approach that enables access to the femoral neck directly from the fracture line at the coronal plane of the greater trochanter without opening the posterior an...

Background: The anatomy of the proximal femur comprises important landmarks for many orthopedic surgical procedures. However, this area exhibits morphological differences depending on race, gender and age. Besides being the insertion area of the hip flexor muscles, the lesser trochanter is also used as an angular reference in many orthopedic surgic...

Background: This study aimed to investigate the outcomes of matrix-associated autologous chondrocyte implantation (MACI) on the treatment of osteochondral lesions in the knee joint and to determine the factors affecting the functional results. Methods: The study included 34 patients with a cartilage defect in the knee joint who were applied MACI...

Amaç: Kliniğimizde Halluks Valgus (HV) deformitesi bulunan hastaların konservatif tedavi yöntemiolan gece ateli uygulaması ile takiplerinde HV açılarının ve fonksiyonel skorlarındaki değişiminincelenmesi amaçlanmıştırMateryal ve Metot: Ocak 2017 – Mayıs 2018 tarihleri arasında Ankara Yıldırım Beyazıt ÜniversitesiYenimahalle Eğitim ve Araştırma Hast...

Magnetic resonance imaging (MRI) is generally the preferred method for assessing lesions of the knee cartilage and subchondral bone. There have been a few cartilage imaging studies using real‐time elastosonography (RTE), which has increased in importance and range of use in recent years. The aim of this cadaveric study was to assess the efficacy of...

Background: UKA necessitates a learning period. From this point of view, it would be logical to prefer the design that tolerates suboptimal tibial rotations better, especially for inexperienced surgeons. The aim of this study was to evaluate and compare the clinical and radiological results of mobile-bearing and fix-bearing UKA designs in case of...

Background: The diagnosis of periprosthetic joint infections (PJI) in patients with inflammatory joint diseases (IJD) could be challenging. Several tests used for diagnosing PJI may be inaccurate due to baseline inflammatory characteristics of such diseases. We aimed to evaluate the accuracy of several infection biomarkers, in a specific subgroup...

Purpose: To investigate the appropriate mediolateral placement of symmetrical tibial components and the amount of overhang expected from the posterolateral of tibial components implanted to give ideal coverage and the subsequent incidence of residual knee pain and reduction in functional capacity. Method: A retrospective evaluation was made of 1...

This article investigates the clinical and radiological results of bilayer matrix autologous chondrocyte implantation (MACI) membrane technique in the treatment of shallow osteochondral defects. An analysis was made of eight patients who were operated on using the bilayer MACI (Genzyme Biosurgery, Cambridge, MA) technique (mean age: 20.2 years, mea...

Background Ideal positioning and best coverage of the tibial base plate are essential in total knee arthroplasty. There are 2 types of tibial base plates: symmetric and asymmetric. The superiority of one to the other is still controversial. The aim of this study was to compare symmetric and asymmetric tibial base plates for total knee arthroplasty...

Just as in all surgical cases, in shoulder arthroscopy the first step towards increasing the success of the operation starts with the setting up and organisation of the operating theatre. The ideal working environment can be provided with the creation of the conditions of a fully equipped operating room by a team specialised in the subject. A stand...

Purpose: The purpose of this study was to introduce our technical modification for concomitant meniscus transplantation and ACL reconstruction with preliminary results of our cases. Methods: The current study comprised of two sections: first is the cadaveric study of 20 specimens. The distances between tunnel entry and exit points of tunnels for...

Purpose: We aimed to evaluate the early clinical and radiological outcomes of arthroscopic one-stage treatment with hyaluronic acid-based cell-free scaffold (HACS) in combination with a concentration of autologous bone marrow aspirate (CBMA) technique compared to nanofracture (NF). Methods: A retrospective evaluation was made of all the patients...

Aims: The combined (IV (intravenous) + topical) use of tranexamic acid (TXA) has been shown to be a safe method and more effective than single (IV or topical) application. The optimal administration method of TXA is still being investigated and safety, efficiency and cost are the three main crucial parameters in achieving the best administration m...

18 DOĞAL DİZ EKLEMİ ANATOMİSİ klem disfonksiyonlarını tam olarak anlayabilmek için doğal-normal eklem fonksiyonlarını bilmek ve fizyolojik durumlar ile karşılaştırmak önemlidir. Normal eklem fonksiyonlarının sağlanmasındaki en önemli gereklilik; doğru olarak dağıtılmış yük dağılımı ile birlikte eklem yüzleri arasında minimüm sür-tünme ve ağrısız ol...

Objective: The objective of this study is to describe the current situation regarding the training, working conditions, future plans, fields of interest and satisfaction of orthopaedics and traumatology residents in Turkey. Methods: A descriptive survey questionnaire consisting of 24 questions was designed to identify the problems and solution s...

Purpose: To compare the microfracture technique with carbon fibre rod implantation for treatment of knee articular cartilage lesions. Methods: 10 men and 30 women aged 22 to 56 (mean, 37.4) years underwent microfracture (n=20) or carbon fibre rod implantation (n=20) for International Cartilage Repair Society grade 3 to 4 knee articular cartilage...

Background: The aim of this pilot study was to analyze the data obtained from a retrospective examination of the records of the existing reimbursement system and through the identification of gaps in the data to create a foundation for a reliable, descriptive national registry system for our country. Methods: The Social Security Institution Medi...

Human hip joint is built to stand and walk. It has the largest range of motion after shoulder joint. However, it is quite a static joint due to surrounding muscles, bones, and ligaments. A large part of hip joint stability is provided by joint capsule rather than by surrounding muscular structures. In this chapter the functional and anatomical char...

Relation between hip, knee, and ankle is mandatory in order to provide adequate lower extremity functions. Besides these joint functions, muscle, tendon, and ligament contribution is essential. In this chapter, the place of knee and ankle in lower extremity functions and surgical approaches will be discussed.

Purpose: The study aimed to volumetrically measure and compare the bone amount removed through the intercondylar femoral notch and the total bone amount removed through five different brands of implant design in order to provide orthopaedic surgeons with opinions in respect of implant selection. Methods: Ten implants from five different total kn...

The frequency of partial rotator cuff tears is gradually increasing because of the advancements in imaging methods and arthroscopy techniques. One of the repair techniques is repair of the partial rotator cuff tear by conversion to a full-thickness tear. Another technique, the transtendon technique, has some practical challenges and risks. We attem...

Unsuccessful outcomes after repair of massive rotator cuff ruptures accompanied by muscle atrophy and fatty degeneration are frequently associated with inadequate management and secondary tears. We report the functional differences after rotator cuff rupture repair with a biodegradable spacer application. In these patients, rotator cuff rupture rep...

Objectives: The purpose of this study is to determine the average thickness of 4 folded hamstring tendons (autograft) which we used on our patients who had tendon reconstruction because of ACB rapture diagnostic. Methods: Between the dates of January 2009 and December 2013, patients who had tendon reconstruction with hamstring autograft because of...