Publications by authors named "Kayaalp A"

Background: Hip arthroscopy (HA) procedures have continued to increase worldwide. However, no data are currently available regarding the increasing HA case volume and trends in Turkey.

Purpose: To identify trends in postoperative care habits and incidence of HA in Turkey using data from the national Health Coding Reference Server (SKRS) database.

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Background: Both knotless and knot-tying anchors are commonly employed in the arthroscopic repair of hip labral tears.

Purpose: To compare the midterm clinical results of arthroscopic hip labral repair using knot-tying versus knotless suture anchors.

Study Design: Cohort study; Level of evidence, 3.

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The ideal femoral tunnel passing through the centre of the femoral neck targeted to the footprint of the ligamentum teres (LT) is established during the LT reconstruction surgery with the free-hand technique. We aimed to quantitatively determine the entry site and define the angular orientation of the ideal femoral tunnel with its relevance to the femoral valgus angle (FVA) and the femoral anteversion angle (FAA) to facilitate the creation of an ideal femoral tunnel during the LT reconstruction surgery. A total of 60 randomly selected CT images were obtained to reconstruct three-dimensional femur models.

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Surgical intervention is the treatment of choice for recurrent lateral patellar instability. Surgery should be considered for first time lateral patella dislocations with osteochondral fractures or underlying anatomical risk factors. Primary repair and nonanatomical imbrications/reconstructions have fallen out of favor due to abnormal biomechanics and high rates of recurrence.

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Background: Several methods have been described to measure external rotation of the tibial tuberosity; all use femoral landmarks.

Purpose: To develop reproducible tibial-based methods to measure external rotation of the tibial tuberosity in patients with patellar instability.

Study Design: Cross-sectional study; Level of evidence, 3.

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Objectives: Addresses the role that psychological distress (ie depression and anxiety) plays in mediating the relationship between workplace harassment (ie sexual and generalized workplace harassment) and increased alcohol problems among employed college students.

Participants: Two waves of data were collected from 905 study participants sampled from eight colleges and universities in the Midwestern United States.

Methods: A mediation analysis was conducted using Hayes's PROCESS macro with bootstrapping.

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Governments around the world are increasingly considering vaccine mandates to curb the spread of COVID-19. In May 2022, we surveyed 394 residents of South Dakota to examine predictors of popular attitudes toward a COVID-19 vaccine mandate. We investigated the role of Big Five personality traits, right-wing authoritarianism, and social dominance orientation, as well as partisan self-identification, evangelical identity, and COVID-19 vaccination status.

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Native patellar tendon injuries are seen in younger patients compared to quadriceps tendon ruptures. Up to a third of the patients may have local (antecedent tendinopathy and cortisone injections) or systemic risk factors (obesity, diabetes, hyperparathyroidism, chronic renal failure, fluoroquinolone or statin use) of injury, these are more frequent in bilateral disruptions. Complete extensor mechanism disruptions should be repaired surgically.

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Article Synopsis
  • The study investigated the effectiveness of thicker grafts (7 mm allogenic tibialis anterior) versus thinner grafts (5 mm autologous iliotibial band) in hip labral reconstruction.
  • Results showed no significant differences in patient-reported outcomes or postoperative scores between the two graft types, despite both groups improving from preoperative levels.
  • The conclusion suggests that the thickness of the graft does not impact clinical outcomes in labral reconstruction surgeries.
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The safe acetabular rim angle is an anatomical measurement used to determine the safety margin when inserting suture anchors. The purpose of the present study was to find out whether aligning the drill bit perpendicularly during arthroscopic surgery can provide a reference point for determining an appropriate angle to facilitate the suture anchor insertion and to prevent extra- and intra-articular perforations. One hundred computed tomographic hips were used to reconstruct three-dimensional acetabular hip models.

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Caregivers are responsible for the care of another, such as a young adult, disabled child, elderly parent, or sick spouse. Individuals who have caregiving responsibilities must blend the often-contradictory behavioral expectations from the different roles in which they reside. Building on the theoretical foundations of Conservation of Resources theory, this study tests a mediational model explicating the process through which caregiver burden impacts mental health through work-family conflict among a community sample of 1,007 unpaid caregivers in the greater Chicago area who responded to a mail survey at three time points.

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Introduction: Research indicates that military service involves stressors that may be related to depression. However, the military provides financial, educational, psychological, and social advantages that may help to mitigate the effects of service-related stressors. Because most prior research was based on cross-sectional data or small clinical samples, we explored individual-level trajectories of depression over time.

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The study examined the relationship between perfectionism (categorized by adaptive, maladaptive, and non-perfectionist clusters), substance use (i.e., drinking and smoking), and mental health in a large sample of college student ( = 841;  = 19.

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Purpose: The purpose of this study was to evaluate the efficacy of intra-operative co-administration of tranexamic acid (TA) and platelet rich fibrin (PRF) using a proprietary co-delivery system on the amount of blood loss, early functional outcomes and wound complications after primary total knee arthroplasty (TKA). The intervention was compared to the standard of care (combined intravenous & topical TA) in a prospective, randomized, blinded setting.

Methods: 80 patients undergoing primary cemented TKA without tourniquet were prospectively randomized into control (combined intravenous and topical TA) and PRF (intra-venous TA and co-delivery of topical PRF and TA) groups after informed consent.

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Large quantities of sludge is generated from different sections of a wastewater treatment plant operation. Sludge can be a solid, semisolid or liquid muddy residual material. Understanding the flow behaviour and rheological properties of sewage sludge at different sections of a wastewater treatment plant (WWTP) is important for the design of pumping system, mixing, hydrodynamics and mass transfer rates of various sludge treatment units, optimization of conditioning dose and for sustainable sludge management.

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The medial collateral ligament (MCL) and the posterior oblique ligament (POL) are the main static valgus restraints of the knee.Most isolated medial injuries can be treated with bracing and early knee motion.Combined MCL and ACL (anterior cruciate ligament) injuries can be managed with bracing of the knee followed by a delayed reconstruction of the ACL.

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We introduce here a novel process for the treatment of particulate-rich wastewater. A two-stage combined treatment process, consisting of an electrolysis filter and a bioelectrochemical system (BES) configuration was designed and evaluated to remove particulate and soluble organic matter from municipal wastewater. The system was designed such that the electrolysis step was used as a filter, enabling physical removal and in situ alkaline hydrolysis of the entrapped particulate matter.

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This study examines the use of bioelectrochemical systems (BES) as an alternative to rock filters for polishing wastewater stabilisation ponds (WSPs) effluent, which often contains soluble chemical oxygen demand (SCOD) and suspended solids mainly as algal biomass. A filter type sediment BES configuration with graphite granules (as the surrogate for rocks in a rock filter) was examined. Three reactor columns were set up to examine three different treatments: (i) open-circuit without current generation; (ii) close-circuit - with current generation; and (iii) control reactor without electrode material.

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This study examined for the first time the use of bioelectrochemical systems (BES) to entrap, decompose and oxidise fresh algal biomass from an algae-laden effluent. The experimental process consisted of a photobioreactor for a continuous production of the algal-laden effluent, and a two-chamber BES equipped with anodic graphite granules and carbon-felt to physically remove and oxidise algal biomass from the influent. Results showed that the BES filter could retain ca.

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Article Synopsis
  • Biofilters effectively convert hydrogen sulphide (H2S) to sulphate in wastewater treatment, requiring optimal moisture and pH.
  • Large volumes of weakly acidic leachate are produced, but after 150 days, the biofilter can generate concentrated sulphuric acid (over 5.5 M) while eliminating H2S efficiently (95% removal).
  • Genetic profiling indicates the upper biofilter sections are best for H2S conversion, suggesting potential for recovering usable sulfur from the process.
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Removal of phosphorus (P) and nitrogen (N) from municipal wastewaters is required to mitigate eutrophication of receiving water bodies. While most treatment plants achieve good N removal using influent carbon (C), the use of influent C to facilitate enhanced biological phosphorus removal (EBPR) is poorly explored. A number of operational parameters can facilitate optimum use of influent C and this study investigated the effects of cycle length, dissolved oxygen (DO) concentration during aerobic period and influent solids on biological P and N removal in sequencing batch reactors (SRBs) using municipal wastewaters.

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Anaerobic digestion of waste activated sludge (WAS) is relatively poor due to hydrolysis limitations. Acid and alkaline pretreatments are effective in enhancing hydrolysis leading to higher methane yields. However, chemical costs often prohibit full-scale application.

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Nowadays, carbon emission and therefore carbon footprint of water utilities is an important issue. In this respect, we should consider the opportunities to reduce carbon footprint for small and large wastewater treatment plants. The use of anaerobic rather than aerobic treatment processes would achieve this aim because no aeration is required and the generation of methane can be used within the plant.

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[Bone bruises of the knee].

Acta Orthop Traumatol Turc

November 2008

Bone bruises represent a spectrum of occult bone lesions around the knee, which can only be detected by magnetic resonance imaging. These lesions can be isolated or are usually associated with other soft tissue injuries of the knee. These occult lesions are mostly associated with anterior cruciate ligament (ACL) injuries and are typically located in the lateral femoral condyle and the posterolateral tibial plateau.

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Introduction: In the literature the best results for pediatric supracondylar humerus fractures have been achieved by closed reduction and wire fixation. However, in these reports the patient group of open reduction and pinning contained the patients who had had previous ineffective closed reduction trials. This retrospective study compared open and closed reduction with pinning, in which the first group of patients was all consecutively treated with open reduction.

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