IRANIAN JOURNAL OF ORTHOPAEDIC SURGERY
Year:2020 | Volume:18 | Issue:3 (70)|Papers Count:5

Introduction: One of the factors affecting the prognosis of distal radius fracture is the anatomical correction. Studies relating anatomical reconstruction with functional consequences have had conflicting results. This study is aimed to investigate the relationship between radiographic indices (anatomical) after displaced distal radius fractures with function and clinical outcomes. Methods: In a retrospective cohort study, radiographic indices, including the radius, volar tilt, teardrop angle, articular cavity depth, and AP Distance were investigated. Pinch and grip strength were measured and the Quick DASH questionnaire evaluated the performance. Results: Pain score significantly correlated with radial shortening (P=0, 038), but it was not independent of treatment method. Patients’,satisfaction rate was significantly lower in patients with abnormal articular depth, independent of age and treatment method (P=0. 004). Quick‐, DASH score significantly correlated with radial shortening and ar􀆟, cular cavity depth, independent of treatment method and age (P=0. 006). Percutaneous pinning was associated significantly with less pain, less disability, and more satisfaction (P<0. 05). Conclusion: Radial shortening and articular cavity depth were correlated with clinical and functional outcomes. While Some studies suggest that radiographic indices in the elderly are not necessarily correlated with functional outcomes, in this study correlation of radiologic indices with clinical and functional outcomes was independent of age.

Introduction: This study aimed to find a statistical relationship between clinical and functional findings based on the Lysholm scoring scale in the success rate of surgery and patient satisfaction with the arthroscopic reconstruction of the anterior cruciate ligament (ACL). Method: This prospective and cross‐, sec􀆟, onal study was performed on 38 pa􀆟, ents (42 knees) aged 17 to 45 years who underwent anterior cruciate ligament (ACL) reconstruc􀆟, on during 2018‐, 2019 due to ACL rupture at Imam Khomeini Hospital in Ahvaz. 6 and 12 months a􀅌, er surgery, clinical trials of "anterior drawer" and "Lachman test" were performed, and the standard Lysholm questionnaire for patients was completed. Then, the compatibility of the test results with the results of the Lysholm questionnaire and MRI was assessed. Results: In the diagnosis of ACL rupture, 6 months a􀅌, er surgery, the highest sensi􀆟, vity was related to the anterior drawer and Lysholm scale tests, and the highest specificity was related to the Lachman test. Also, the highest positive predictive value was related to the Lachman test and the highest negative predictive value was related to the anterior drawer and Lysholm scale tests. 12 months a􀅌, er surgery, the highest sensitivity was related to the Lysholm scale and the highest specificity was related to the Lachman test. The highest positive predictive value was for the Lachman test and the highest negative predictive value was for the Lysholm scale. In the first 6 months, gra􀅌,failure was observed in 13. 6% of pa􀆟, ents, but the percentage of patients with “, Fair”,and “, Poor”,Lysholm scale was 28. 95%. In the second 6 months, gra􀅌,failure was observed in 7. 14% of pa􀆟, ents, but the percentage of pa􀆟, ents with “, Fair”,and “, Poor”,Lysholm scale was 19. 05%. Conclusion: Since in some cases, such as excessive knee diameter due to obesity or swelling, the examination may be limited and citation of clinical test results may be erroneous, it is recommended that in addition to mechanical tests such as the Lachman test and the anterior drawer test, standard questionnaires such as Lysholm be used to more accurately assess the success of surgery and treatment, as well as to help identify more accurate lesions.

Background: Damage in cartilage tissue is one of the global challenges and affects a large percentage of people. Trauma or age‐, related degenerative disease is the main cause of osteoarthritis. The aim of this study was to evaluate the effect of intra‐, articular injection for bone marrow mesenchymal stem cells and the resulting secretions in repairing the damaged cartilage of the rat knee joint. Methods: 30 male rats that weights approximately 200 to 250 g were randomly divided into five groups of 6 rats, including healthy group (receiving physiological serum), osteoarthritis group (monosodium iodoacetate injection), mesenchymal group, mesenchymal group + receiving the same volume of cell secretions + culture medium and culture medium injection group. Four weeks later, the rats have been killed and the hip joint examined by both macroscopic and microscopic methods. Results: The results showed that the injec􀆟, on of 2. 5*105 cells per ml had a good effect on the repairing of cartilaginous lesions caused by the monosodium iodoacetate injection. Histological studies showed that fibrilla􀆟, on rate, the presence of small gaps and deep gaps (P <0. 05) decreased in the mesenchymal treatment group. The level of proteoglycans in mesenchymal treatment group increased significantly (P <0. 05). Also, in the treatment group with mesenchymal secre􀆟, ons and culture medium, changes were observed in repairing the damaged cartilage, which was not significantly different from the osteoarthritis group. Conclusion: In this study, the restorative effect has benn confirmed for bone marrow mesenchymal stem cells and their secretions in improving histopathological lesions of rat articular cartilage.

Background: To study the creep behavior for a series of biodegradable nanocomposites, which are used as implantable devices in the body such as bioscrews, is a crucial factor. In the current paper, we are investigating these biomaterials ‐, short‐, time creep and creep recover manners‐,in several classic models. Methods: The creep and creep recovery behaviors of nanocomposites composed of biodegradable polymer blends, poly (D/L) lactic acid (PDLLA) and polycaprolactone (PCL) reinforced with three different contents of 1, 3 and 6 percent weight percentage bioactive glass nanoparticles (m‐, BGn) were modeled. Several theoretical models including Findley power law, Burgers and Weibull models were used to establish the relations between m‐, BGn dispersion and final creep and creep‐, recovery behaviors of nanocomposites. Results: The Findley power law model confirmed that the lowest ‘, A’,and highest ‘, n’,parameters ( A is the amplitude of the transient creep strain and n is the time exponent) belong to the sample with the highest young modulus and the nanocomposites compared to PDLLA/PCL blends have the lower ‘, A’,and higher ‘, n’,which can be related to retardation effect of m‐, BGn on creep strains. Besides, the burgers model results illustrated that all viscoelastic and viscoplastic parameters for nanocomposites possess higher values than those of the neat PDLLA/PCL blend. It means that the addition of glass nanoparticles leads to decrease creep strain, increasing the Burgers model prediction values which have inverse trend with. Moreover, the weibull distribution model results acknowledge that the introduction of m‐, BGn into PDLLA/PCL polymeric blends cause decrease in the viscoelastic strain recovery values. This is due to hindering effects of m‐, BGn on creep recovery behavior of nanocomposites. Conclusion: The results obtained from modeling of creep‐, recovery manners of PDLLA/PCL blend and its nanocomposites approved that the bioactive glass reinforcement nanoparticles play impeding role on creep and creep recovery behaviors. Level of evidence: I

Leg Length Discrepancy (LLD) after Total Hip Arthroplasty (THA) is a prevalent complication that affects the patient's satisfaction with joint replacement surgery. It is the most common reasons for a patient's complaint of a doctor after a joint replacement. Patients will tolerate limb shortness more efficiently than their longevity. The LLD will create pain and limpness for the patients that result in premature aseptic loosening and back pain. Therefore, the surgeon should try to avoid this complication with the help of preoperative templating and various other methods during the operation. The present study examined the reasons for LLD and its preventive procedures in pre/intra‐, operation.