Ali Varol - Academia.edu (original) (raw)
Papers by Ali Varol
Revista Brasileira de Ortopedia, 2021
Resumo Objetivo Comparar os níveis séricos de vitamina D e minerais de crianças com ou sem fratur... more Resumo Objetivo Comparar os níveis séricos de vitamina D e minerais de crianças com ou sem fraturas isoladas da extremidade distal do rádio. Métodos Este estudo clínico prospectivo incluiu 50 crianças (com idade entre 5 e 15 anos) com fratura isolada distal do rádio que deram entrada em nossa unidade de emergência entre fevereiro e maio de 2018 como grupo de estudo (grupo A), e 50 crianças saudáveis sem histórico de fratura como grupo controle (grupo B). Foram obtidas e analisadas amostras de sangue venoso periférico para medições de 25-hidroxivitamina D (25(OH)D), Cálcio (Ca), Magnésio (Mg), Fósforo (P), fosfatase alcalina (FA) e hormônio da paratireoide (HPT) em ambos os grupos. As características dos pacientes e as amostras de sangue venoso periférico foram comparadas entre os grupos. Resultados A média de idade, altura, peso, índice de massa corporal (IMC) e distribuição de gênero foram semelhantes em ambos os grupos. Não houve diferenças estatísticas nas análises sanguíneas, in...
Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca, 2021
PURPOSE OF THE STUDY To investigate the pressure levels on the axillary nerve at different plate ... more PURPOSE OF THE STUDY To investigate the pressure levels on the axillary nerve at different plate positions after plate fixation of a proximal humerus fracture. MATERIAL AND METHODS Eight fresh-frozen cadaveric specimens were used. The plates were applied on the lateral side of the humerus. A FlexiForce pressure sensor was placed between the nerve and the plate, and the pressure on the nerve was measured (Group 1). The plates were then placed in two different positions such that distal portion of the plates would have 30° anterior and 30° posterior angles to the anatomical axis of the humerus (Group 2 and 3). The anterior of the distal attachment of the deltoid muscle was then elevated and the plates were placed in the middle of the anatomical axis of the humerus (Group 4). The position of the plates were controlled by fluoroscopy and the pressure was measured for each configuration sequentially. RESULTS The mean age of the cadavers was 70.5 ± 6.8 years (range: 61-80 years). Mean pre...
Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca, 2021
PURPOSE OF THE STUDY To compare the early clinical results of patients who had anterior cruciate ... more PURPOSE OF THE STUDY To compare the early clinical results of patients who had anterior cruciate ligament (ACL) reconstruction with peroneus longus allograft versus hamstring tendon autograft. MATERIAL AND METHODS Forty patients who underwent ACL reconstruction were included in the study. Patients were grouped by their graft preference. Lachman and Pivot-shift tests were performed to the patients. Laxity was measured by KT-1000 arthrometer test with 15, 20 and 30 pound power. The maximum force values of nonoperated knee and the operated knee were recorded with Cybex II isokinetic dynamometer (HUMAC) and compared to each other. International Knee Documentation Committee (IKDC) form, modified Lysholm and Cincinnati evaluation forms were compared between two groups. RESULTS Twenty patients included into peroneus longus allograft (Group 1) and 20 patients were included into hamstring autograft group (Group 2). The mean age of patients Group 1 and 2 were 34.25 ± 6.73, and 29.6 ± 4.55, re...
Objective: To demonstrate the efficacy of locking plate osteosynthesis performed by an L-shaped l... more Objective: To demonstrate the efficacy of locking plate osteosynthesis performed by an L-shaped lateral approach in patients with Sanders type III and IV intra-articular calcaneal fractures with posterior facet displacement. Methods: Fifty-three patients with Sanders type III or IV unilateral calcaneal fractures treated with locking plates and additional bone grafting were included in the study. Böhler and Gissane angles, and heel height values were measured on the radiological examinations. Clinical results of the patients were evaluated using the American Orthopaedic Foot and Ankle Society and Maryland evaluation criteria. The presence of arthrosis was investigated with Broden’s view. Preoperative and postoperative values were evaluated. Results: The mean Gissane angle was 119.32°, the mean Böhler angle was 9.47° and the mean heel height was 40.82 mm on radiographs at initial presentation of the patients. The mean Gissane angle was 114.63°, the mean Böhler angle was 23.33° and the...
Foot and Ankle Surgery, 2021
A controversial and unresolved issue in cognitive neuroscience is whether humans can experience s... more A controversial and unresolved issue in cognitive neuroscience is whether humans can experience supernumerary limbs as part of their own body. Some previous experiments have claimed that it is possible to elicit supernumerary hand illusions based on modified versions of the rubber hand illusion. However, other studies have provided conflicting results that suggest that only one rubber hand can be perceived as one's own. To address this issue, we developed a supernumerary hand illusion paradigm that allowed us to disambiguate ownership of individual rubber hands from simultaneous ownership of two fake hands. In our setup, the participant's real right hand was hidden under a platform, while two identical right rubber hands were placed in parallel on top of the platform in direct view of the participant. We applied synchronous strokes to both rubber hands and the real hand (SS), synchronous strokes to one rubber hand and the real hand and asynchronous strokes to the other model hand (AS and SA) or asynchronous strokes to both fake hands in relation to the real hand (AA). Our results demonstrate that a genuine illusion of owning two rubber hands can be elicited and that such a supernumerary hand illusion can be isolated from the sense of ownership of a single rubber hand both in terms of questionnaire ratings and threat-evoked skin conductance responses (SCRs). These findings advance our knowledge about the dynamic flexibility and fundamental constraints of body representation and emphasize the importance of correlated afferent signals for causal inference in body ownership.
Advances in Orthopedics, 2021
Background. To evaluate the clinical and radiological results of closed reduction, distraction us... more Background. To evaluate the clinical and radiological results of closed reduction, distraction using an external fixator, and percutaneous fixation in patients with Bennet and Rolando fractures. Methods. Patients over 18 years of age, who had isolated fracture at the base of the first metacarpal bone, had no previous functional limitations and pain complaints, were regularly followed up, and had fixation using K-wire combined with an external fixator, were included. Arthrosis was evaluated according to Eaton and Littler classification. Pain intensity was evaluated using the visual analogue scale (VAS) on a 0–10 scale. Furthermore, patients were questioned regarding limitations in their daily activities and hobbies. Pinch and grasp strengths were evaluated. Results. Thirteen of the patients were male and five were female, with a mean age of 31.5 ± 12.5 years. The surgical procedure was performed on the right extremity in 12 patients and left extremity in six patients. Twelve patients...
SAGE Open Medicine, 2020
Background: The objective of this study was to evaluate the risk of femur intertrochanteric fract... more Background: The objective of this study was to evaluate the risk of femur intertrochanteric fracture associated with femur trochanter major fractures in patients over 65 years of age with magnetic resonance examination for better diagnosis and treatment. Methods: Thirty-one patients who had incomplete femur intertrochanteric fracture diagnosed were included in the study. Patients were classified according to the length of the fracture line crossing the intertrochanteric border. Fracture patterns were described on magnetic resonance imaging coronal views. Group A, pattern 1, greater trochanteric fracture extends to intertrochanteric region with both cortices; Group B, pattern 2, fracture has characteristics of pattern 1 fracture including diametaphysis fracture line; Group C, pattern 3, greater trochanteric fracture only has extending superolateral cortex fracture line of intertrochanteric region; and Group D, pattern 4, fracture has characteristics of pattern 1 fracture and includin...
BioMed Research International, 2019
Background. Osteoid osteoma (OO) is one of the most commonly occurring benign bone tumors. It con... more Background. Osteoid osteoma (OO) is one of the most commonly occurring benign bone tumors. It constitutes 10-12% of benign bone tumors and 2-3% of primary bone tumors. In radiofrequency ablation (RFA) treatment, the cells of the tumor are thermally inactivated by the help of electrodes shaped like needles. In our study, we aimed to show the major and minor complications in patients undergoing RFA and to show what should be done to prevent these complications. Methods. The study was carried out as a prospective study on the follow-up of 87 osteoid osteoma patients treated between 2015 and 2017. The youngest of the patients was 1 year old and the oldest was 42 years old. The RFA procedure lasted 10 min on average, excluding anesthesia and preparation. All lesions were ablated at 90 degrees for 7 minutes with the heat increased gradually. All patients were followed up for 1 day in the orthopedics clinic. Results. Complications were observed in 7 patients. The lesions with the most comp...
Journal of orthopaedic surgery and research, Jan 3, 2018
Complications related to extensor tendons have begun to increase with the use of volar plates in ... more Complications related to extensor tendons have begun to increase with the use of volar plates in the treatment of distal radius fractures. In this study, we aimed to compare four-plane radiography and ultrasonography in the evaluation of dorsal cortex screw penetration following volar plate fixation. We recruited 47 patients (33 males, 14 females, mean age 37.4 years; range 18-58 years). To evaluate dorsal screw penetration in all patients, we performed radiographs at 45° pronation, 45° supination and obtained dorsal tangential graphs at maximum palmar flexion, and a wrist lateral radiograph. Wrist ultrasonography was performed in all patients. Dorsal screw penetration was detected in 12 of the 47 patients undergoing VLP application. While there was > 2 mm screw penetration in seven patients, there was < 2 mm screw penetration in five patients. On four-plane radiographs, screw penetration > 2 mm was detected in seven patients and screw penetration < 2 mm was detected in ...
Amaç: Primer hiperparatiroidizmi (PHPT) olup yanlış tanı ve tedaviye yönlendirilebilecek hastalar... more Amaç: Primer hiperparatiroidizmi (PHPT) olup yanlış tanı ve tedaviye yönlendirilebilecek hastalar için, ortopedik cerrahi öncesinde daha iyi analiz edilmesine yol gösterecek bir çalışma planladık. Gereç ve Yöntem: 2003-2017 yılları arasında ortopedi polikliniğimize başvuran, kemik lezyonu veya kırığı nedeniyle muayene edilip tedavi edilen ve PHPT tanısı alan 12 hasta çalışmaya alındı. Hastalar adenektomi için genel cerrahi kliniğine sevk edildi. Adenektomi sonrası kistlerin durgunluğunu takip etmek için direkt radyografi kullanıldı. Bulgular: Hastaların ortalama yaşı 36,6±13,4 yıl idi. Çalışmaya dahil edilen hastaların 7'si kadın, 5'i erkekti. Üç hastada bireysel kemik tutulumu gözlenirken, 9 hastada çoklu kemik tutulumu gözlendi. Sekiz hastada patolojik kırık vardı. Artmış osteoklastik aktivite ve çok çekirdekli dev hücreler gösteren tüm hastalara biyopsi yapıldı ve bu bulgular için bir rapor yayınlandı. Sonuç: Brown tümör, hiperparatiroidizm sırasında kemik dokularında gelişen çok nadir reaktif lezyonlardır. Kistik ve litik lezyonlar için kesin bir tanı koymak için, hastanın klinik durumundan şüphelenmek ve olası herhangi bir tanıyı akılda tutmak gerekir. Anahtar kelimeler: Brown tümör, dev hücreli tümör, primer hiperparatiroidizm, metastatik kemik lezyonu
Revista Brasileira de Ortopedia, 2021
Resumo Objetivo Comparar os níveis séricos de vitamina D e minerais de crianças com ou sem fratur... more Resumo Objetivo Comparar os níveis séricos de vitamina D e minerais de crianças com ou sem fraturas isoladas da extremidade distal do rádio. Métodos Este estudo clínico prospectivo incluiu 50 crianças (com idade entre 5 e 15 anos) com fratura isolada distal do rádio que deram entrada em nossa unidade de emergência entre fevereiro e maio de 2018 como grupo de estudo (grupo A), e 50 crianças saudáveis sem histórico de fratura como grupo controle (grupo B). Foram obtidas e analisadas amostras de sangue venoso periférico para medições de 25-hidroxivitamina D (25(OH)D), Cálcio (Ca), Magnésio (Mg), Fósforo (P), fosfatase alcalina (FA) e hormônio da paratireoide (HPT) em ambos os grupos. As características dos pacientes e as amostras de sangue venoso periférico foram comparadas entre os grupos. Resultados A média de idade, altura, peso, índice de massa corporal (IMC) e distribuição de gênero foram semelhantes em ambos os grupos. Não houve diferenças estatísticas nas análises sanguíneas, in...
Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca, 2021
PURPOSE OF THE STUDY To investigate the pressure levels on the axillary nerve at different plate ... more PURPOSE OF THE STUDY To investigate the pressure levels on the axillary nerve at different plate positions after plate fixation of a proximal humerus fracture. MATERIAL AND METHODS Eight fresh-frozen cadaveric specimens were used. The plates were applied on the lateral side of the humerus. A FlexiForce pressure sensor was placed between the nerve and the plate, and the pressure on the nerve was measured (Group 1). The plates were then placed in two different positions such that distal portion of the plates would have 30° anterior and 30° posterior angles to the anatomical axis of the humerus (Group 2 and 3). The anterior of the distal attachment of the deltoid muscle was then elevated and the plates were placed in the middle of the anatomical axis of the humerus (Group 4). The position of the plates were controlled by fluoroscopy and the pressure was measured for each configuration sequentially. RESULTS The mean age of the cadavers was 70.5 ± 6.8 years (range: 61-80 years). Mean pre...
Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca, 2021
PURPOSE OF THE STUDY To compare the early clinical results of patients who had anterior cruciate ... more PURPOSE OF THE STUDY To compare the early clinical results of patients who had anterior cruciate ligament (ACL) reconstruction with peroneus longus allograft versus hamstring tendon autograft. MATERIAL AND METHODS Forty patients who underwent ACL reconstruction were included in the study. Patients were grouped by their graft preference. Lachman and Pivot-shift tests were performed to the patients. Laxity was measured by KT-1000 arthrometer test with 15, 20 and 30 pound power. The maximum force values of nonoperated knee and the operated knee were recorded with Cybex II isokinetic dynamometer (HUMAC) and compared to each other. International Knee Documentation Committee (IKDC) form, modified Lysholm and Cincinnati evaluation forms were compared between two groups. RESULTS Twenty patients included into peroneus longus allograft (Group 1) and 20 patients were included into hamstring autograft group (Group 2). The mean age of patients Group 1 and 2 were 34.25 ± 6.73, and 29.6 ± 4.55, re...
Objective: To demonstrate the efficacy of locking plate osteosynthesis performed by an L-shaped l... more Objective: To demonstrate the efficacy of locking plate osteosynthesis performed by an L-shaped lateral approach in patients with Sanders type III and IV intra-articular calcaneal fractures with posterior facet displacement. Methods: Fifty-three patients with Sanders type III or IV unilateral calcaneal fractures treated with locking plates and additional bone grafting were included in the study. Böhler and Gissane angles, and heel height values were measured on the radiological examinations. Clinical results of the patients were evaluated using the American Orthopaedic Foot and Ankle Society and Maryland evaluation criteria. The presence of arthrosis was investigated with Broden’s view. Preoperative and postoperative values were evaluated. Results: The mean Gissane angle was 119.32°, the mean Böhler angle was 9.47° and the mean heel height was 40.82 mm on radiographs at initial presentation of the patients. The mean Gissane angle was 114.63°, the mean Böhler angle was 23.33° and the...
Foot and Ankle Surgery, 2021
A controversial and unresolved issue in cognitive neuroscience is whether humans can experience s... more A controversial and unresolved issue in cognitive neuroscience is whether humans can experience supernumerary limbs as part of their own body. Some previous experiments have claimed that it is possible to elicit supernumerary hand illusions based on modified versions of the rubber hand illusion. However, other studies have provided conflicting results that suggest that only one rubber hand can be perceived as one's own. To address this issue, we developed a supernumerary hand illusion paradigm that allowed us to disambiguate ownership of individual rubber hands from simultaneous ownership of two fake hands. In our setup, the participant's real right hand was hidden under a platform, while two identical right rubber hands were placed in parallel on top of the platform in direct view of the participant. We applied synchronous strokes to both rubber hands and the real hand (SS), synchronous strokes to one rubber hand and the real hand and asynchronous strokes to the other model hand (AS and SA) or asynchronous strokes to both fake hands in relation to the real hand (AA). Our results demonstrate that a genuine illusion of owning two rubber hands can be elicited and that such a supernumerary hand illusion can be isolated from the sense of ownership of a single rubber hand both in terms of questionnaire ratings and threat-evoked skin conductance responses (SCRs). These findings advance our knowledge about the dynamic flexibility and fundamental constraints of body representation and emphasize the importance of correlated afferent signals for causal inference in body ownership.
Advances in Orthopedics, 2021
Background. To evaluate the clinical and radiological results of closed reduction, distraction us... more Background. To evaluate the clinical and radiological results of closed reduction, distraction using an external fixator, and percutaneous fixation in patients with Bennet and Rolando fractures. Methods. Patients over 18 years of age, who had isolated fracture at the base of the first metacarpal bone, had no previous functional limitations and pain complaints, were regularly followed up, and had fixation using K-wire combined with an external fixator, were included. Arthrosis was evaluated according to Eaton and Littler classification. Pain intensity was evaluated using the visual analogue scale (VAS) on a 0–10 scale. Furthermore, patients were questioned regarding limitations in their daily activities and hobbies. Pinch and grasp strengths were evaluated. Results. Thirteen of the patients were male and five were female, with a mean age of 31.5 ± 12.5 years. The surgical procedure was performed on the right extremity in 12 patients and left extremity in six patients. Twelve patients...
SAGE Open Medicine, 2020
Background: The objective of this study was to evaluate the risk of femur intertrochanteric fract... more Background: The objective of this study was to evaluate the risk of femur intertrochanteric fracture associated with femur trochanter major fractures in patients over 65 years of age with magnetic resonance examination for better diagnosis and treatment. Methods: Thirty-one patients who had incomplete femur intertrochanteric fracture diagnosed were included in the study. Patients were classified according to the length of the fracture line crossing the intertrochanteric border. Fracture patterns were described on magnetic resonance imaging coronal views. Group A, pattern 1, greater trochanteric fracture extends to intertrochanteric region with both cortices; Group B, pattern 2, fracture has characteristics of pattern 1 fracture including diametaphysis fracture line; Group C, pattern 3, greater trochanteric fracture only has extending superolateral cortex fracture line of intertrochanteric region; and Group D, pattern 4, fracture has characteristics of pattern 1 fracture and includin...
BioMed Research International, 2019
Background. Osteoid osteoma (OO) is one of the most commonly occurring benign bone tumors. It con... more Background. Osteoid osteoma (OO) is one of the most commonly occurring benign bone tumors. It constitutes 10-12% of benign bone tumors and 2-3% of primary bone tumors. In radiofrequency ablation (RFA) treatment, the cells of the tumor are thermally inactivated by the help of electrodes shaped like needles. In our study, we aimed to show the major and minor complications in patients undergoing RFA and to show what should be done to prevent these complications. Methods. The study was carried out as a prospective study on the follow-up of 87 osteoid osteoma patients treated between 2015 and 2017. The youngest of the patients was 1 year old and the oldest was 42 years old. The RFA procedure lasted 10 min on average, excluding anesthesia and preparation. All lesions were ablated at 90 degrees for 7 minutes with the heat increased gradually. All patients were followed up for 1 day in the orthopedics clinic. Results. Complications were observed in 7 patients. The lesions with the most comp...
Journal of orthopaedic surgery and research, Jan 3, 2018
Complications related to extensor tendons have begun to increase with the use of volar plates in ... more Complications related to extensor tendons have begun to increase with the use of volar plates in the treatment of distal radius fractures. In this study, we aimed to compare four-plane radiography and ultrasonography in the evaluation of dorsal cortex screw penetration following volar plate fixation. We recruited 47 patients (33 males, 14 females, mean age 37.4 years; range 18-58 years). To evaluate dorsal screw penetration in all patients, we performed radiographs at 45° pronation, 45° supination and obtained dorsal tangential graphs at maximum palmar flexion, and a wrist lateral radiograph. Wrist ultrasonography was performed in all patients. Dorsal screw penetration was detected in 12 of the 47 patients undergoing VLP application. While there was > 2 mm screw penetration in seven patients, there was < 2 mm screw penetration in five patients. On four-plane radiographs, screw penetration > 2 mm was detected in seven patients and screw penetration < 2 mm was detected in ...
Amaç: Primer hiperparatiroidizmi (PHPT) olup yanlış tanı ve tedaviye yönlendirilebilecek hastalar... more Amaç: Primer hiperparatiroidizmi (PHPT) olup yanlış tanı ve tedaviye yönlendirilebilecek hastalar için, ortopedik cerrahi öncesinde daha iyi analiz edilmesine yol gösterecek bir çalışma planladık. Gereç ve Yöntem: 2003-2017 yılları arasında ortopedi polikliniğimize başvuran, kemik lezyonu veya kırığı nedeniyle muayene edilip tedavi edilen ve PHPT tanısı alan 12 hasta çalışmaya alındı. Hastalar adenektomi için genel cerrahi kliniğine sevk edildi. Adenektomi sonrası kistlerin durgunluğunu takip etmek için direkt radyografi kullanıldı. Bulgular: Hastaların ortalama yaşı 36,6±13,4 yıl idi. Çalışmaya dahil edilen hastaların 7'si kadın, 5'i erkekti. Üç hastada bireysel kemik tutulumu gözlenirken, 9 hastada çoklu kemik tutulumu gözlendi. Sekiz hastada patolojik kırık vardı. Artmış osteoklastik aktivite ve çok çekirdekli dev hücreler gösteren tüm hastalara biyopsi yapıldı ve bu bulgular için bir rapor yayınlandı. Sonuç: Brown tümör, hiperparatiroidizm sırasında kemik dokularında gelişen çok nadir reaktif lezyonlardır. Kistik ve litik lezyonlar için kesin bir tanı koymak için, hastanın klinik durumundan şüphelenmek ve olası herhangi bir tanıyı akılda tutmak gerekir. Anahtar kelimeler: Brown tümör, dev hücreli tümör, primer hiperparatiroidizm, metastatik kemik lezyonu