Amin Bigham-Sadegh; Siavash Sharifi; Iraj Karimi; Ahmad Oryan; Mina Maleki
Abstract
Background: Orthopedic surgeons are trying to find best substitutes for bone grafting in human and veterinary medicine. Bone autografts are still as a golden standard in comparison with other bone grafts. Diced ear cartilage from dog and rabbit have been used on bone healing previously, in the ...
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Background: Orthopedic surgeons are trying to find best substitutes for bone grafting in human and veterinary medicine. Bone autografts are still as a golden standard in comparison with other bone grafts. Diced ear cartilage from dog and rabbit have been used on bone healing previously, in the present study effects of rabbit and bovine rib cartilages will evaluated in bone healing of rabbit bone defect model.
Method: In this study, 20 adult rabbits weighing approximately 2 kg were used. The rabbits were randomly divided into 4 groups. The bone segment was removed from the mid radial bone. In the first group (N = 5) in the gap segement of bovine rib cartilage was implanted. In the second group (N = 5) in the gap, segement of rabbit rib cartilage was implanted. In the third group (empty control group), (N = 5) the defect was left without implantation. Finally, the fourth group (autograft Group), (N = 5) the defect was filled with a same harvested bone. The skin and muscles were sutured routinely. X-rays were taken on 14th , 28th , 42nd and 56th postoperative days.
Result and conclusion: After 8 weeks bone samples were taken from healed area for for histopathological evaluation. The results of our study indicate allogenic and xenogenic cartilage acted almost like autograft groups and were better than empty group.
Mohammad Haghpanahi; S Moradi
Abstract
Background:Characterization of mechanical behavior of meniscus is very important issue due to significant role of meniscus in load bearing within the knee joint and identifying mechanical change in meniscal tissue is of particular interest with respect to osteoarthritis (OA) research. Acl tear can also ...
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Background:Characterization of mechanical behavior of meniscus is very important issue due to significant role of meniscus in load bearing within the knee joint and identifying mechanical change in meniscal tissue is of particular interest with respect to osteoarthritis (OA) research. Acl tear can also have deep impression on the meniscus clinically. Meniscus injury is common in pations with tear Acl.
Objectives: The purpose of this study is to survey Longitudinal tear meniscus for analysis and a finite element analysis model to achieve tension on the knee with Acl stability during meniscus tear and unstability of this Acl used on determine the procedure distribution compared the processing the output of different models.
Methods & Materials: 3-dimensional finite element model of knee joint biomechanics with the help of CT scan images were made. Healthy hip bone structure were designed with mimics software. The obtained model to Abaqus software is compiled for analysis.
Result: The maximum shear stress on page medial meniscus 1.73 Mpa and lateral meniscus on the page is 1.48Mpa. As a result, the amount of tension in the meniscus is more internal than external meniscus. The medial meniscus will be damaged more. In cruciate ligament tear sustained maximum shear stress 8.33Mpa on page medial meniscus and cruciate ligament tears with instability maximum shear stress is on page medial meniscus 9.65Mpa.
Conclusion: The result confirmed that biomechanical response of meniscus tear and Acl tear an important role in the stability of the meniscus. A meniscus and ligament tears in the meniscus increased levels of stress and stress distribution diagram.
Amir Salari; Ahmad –Reza Mirbolok; Mozafar Hoseininejad; Ali Karimi
Abstract
Abstract
Background: Carpal tunnel syndrome (CTS) is the most common form of localized peripheral neuropathy. CTS and cervical radiculopathy (CR) often co-occur, known as double crush syndrome (DCS).
Aim: This study aimed at determining frequency of CR in patients with CTS referred to electrodiagnosis ...
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Abstract
Background: Carpal tunnel syndrome (CTS) is the most common form of localized peripheral neuropathy. CTS and cervical radiculopathy (CR) often co-occur, known as double crush syndrome (DCS).
Aim: This study aimed at determining frequency of CR in patients with CTS referred to electrodiagnosis department of Rasht Imam Reza clinic.
Materials and Methods: This was a descriptive cross-sectional study on 117 patients with CTS referred to Imam Reza clinic. The patients’ data were recorded through a questionnaire including electrodiagnosis test results, patients’ demographic data, medical history and disease primary diagnosis and related results, electromyogram (EMG)/nerve conduction velocity (NCV) tests results. NCV test shows CTS type (unilateral and bilateral) as well as its severity, while EMG test determines co-occurrence of CR and CTS, type and severity of DCS. Finally, the data were entered into SPSS 19, and analyzed using statistical tests.
Results: Out of 117 patients with primary diagnosis of CTS, 21 patients (17.9%) were male and 96 patients (82.1%) were female, with a mean age of 46.5 years. The highest frequency (41.5%) in patients with CTS belonged to housewives. 48 (41%) patients had bilateral CTS and 69 patients (59%) suffered from unilateral one. DCS prevalence in this study was about 35%. Out of 41 patients with DCS, 25 patients (61%) had unilateral DCS with moderate severity (48.8%) and C7 radiculopathy (70.7%). Using binary logistic regression analysis (method=ENTER) showed that age and body mass index (BMI) were two variables affecting on the simultaneous development of CTS and cervical spines involvement (P<0.0001).
Conclusion: Since knowing simultaneous presence of CR and CTS in patients’ therapy is necessary, patients with CTS should be examined for DCS.
Alireza Saied, MD; Afshin Ahmadzadeh Heshmati, MD; Amir Reza Sadeghifar, MD; Ali Okati, MD
Abstract
Background: Tibia and femur fractures are among the most common fractures and intramedullary nailing is the standarad treatment. This study was performed to determine the best preoperative method for estimating the intramedullary nail length.
Methods: In a cross sectional study, 82 patients with tibia ...
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Background: Tibia and femur fractures are among the most common fractures and intramedullary nailing is the standarad treatment. This study was performed to determine the best preoperative method for estimating the intramedullary nail length.
Methods: In a cross sectional study, 82 patients with tibia and 25 patients with femur shaft fracture were studied in a training center of Kerman-Iran. The estimated preoperative intramedullary nail length and the length of used nail at operation were compared. The measurment methods for femur fractures were greatrer trochanter-patella, greater trochanter-lateral epicondyle and olecranon-fithe finegr tip; and for tibia fractures were medial malleolus-tuberosity, intact leg radiogram and olecranon fifth metacarp were assessed. Data was assesed by statistical methods.
Results: Almost all of the examined methods showed "good" interobserver and intraobserver reliability. In femur fracture, the greater to patella method showed the best ICC (0.876) and the lowest SEM (0.777). In tibia fracture, best ICC (0.860) and the lowest SEM (0.602) were for medial malleolus tubercle method. For femur fractures, 64% of the measurements in greater to patella, 93% in olecranon fifth finger, 100% of greater to epicondyle methods; and for tibia fractures 40.9% in medial malleolus tubercle, 37.3% of olecranon metacarp and 65.06% of radiogram method were larger than the nail used at operation.
Conclusions: The best method for estimation of nial length was medial malleolus to tuberosity for tibia fractures, and greater to patella method for femur fractures; however none of the examined methods was found completely suitable.
Afshin Afshin Taheriazam; MohammadAli Sahebalzamani
Abstract
Today, Total Hip Replacement has become one of the most common orthopedic surgeries such that it provides better life conditions for patients suffering from complex and painful lesions. Considering the ever increasing growth of such surgeries, it is necessary to introduce new challenges and threats of ...
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Today, Total Hip Replacement has become one of the most common orthopedic surgeries such that it provides better life conditions for patients suffering from complex and painful lesions. Considering the ever increasing growth of such surgeries, it is necessary to introduce new challenges and threats of this context. Wear and corrosion in design variables and stem production related to hip replacement surgery has always been debated. This paper tries to describe the scientific knowledge of problems in wear and corrosion of stem's neck cone region because neglecting this issue may cause a disaster. Following different shear forces in the area shared between prosthetic head and cone region of the prosthetic stem, corrosion caused by friction and wearing in the surface shared between these two which is referred to as Taperosis, creates metal ions and very small particles released from metal surface on poly ethylene liners of hip replacement which results in metallosis, bone osteolysis and instability of the prosthesis. Clinical importance of Taperosis is still unknown but its role in destructive interactions is increasing. This paper investigates the valid papers of previous and recent studies in this context to describe this challenge and tries to clarify the importance of this issue.
Abstract
:Operative surgeries for orthopedic hardware removal are one of the most common elective orthopedic surgeries. Believes and conceptions of orthopedists about removing orthopedic devices are different. There is no solution based on witness about removing orthopedic devices.
all the patients ...
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:Operative surgeries for orthopedic hardware removal are one of the most common elective orthopedic surgeries. Believes and conceptions of orthopedists about removing orthopedic devices are different. There is no solution based on witness about removing orthopedic devices.
all the patients who had been admitted for removing orthopedic devices in operating roomhad been studied prospectively
140patients, 90 males (64.5 %) and 50 females (35.5%) , with average 48.18±54.35 years old (18-95 years old) studied.Most anatomic location included leg with 39 cases (27.7%) and Femur with 21 cases (14.9%) and less anatomic locations included Hip with 1 case (0.7%) and shoulder with 2 cases (1.4%).26 patients (18.5%) were operated as an elective surgery (due to surgeon’s recommendation and hospitalization in this group were in average 32.12 minutes and 4.44 days.
decision about removing orthopedic devises is difficult, needs to pay attention to all aspects and current indications.Because of lack of facilities and hospital staff are can say that by reducing elective surgeries cases we can consider the more important patients.
