amid Reza HSeyyed Hosseinzadeh, MD; Tahmineh Mokhtari; Mohamad Qoreishy, MD
Abstract
Total hip arthroplasty (THA) is the replacement of the hip joint by artificial prosthesis. This surgery is one of the most successful orthopaedic surgeries. The most important challenge to the THA is bearing surface of these implants, which is closely related to the survival of the prosthesis. ...
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Total hip arthroplasty (THA) is the replacement of the hip joint by artificial prosthesis. This surgery is one of the most successful orthopaedic surgeries. The most important challenge to the THA is bearing surface of these implants, which is closely related to the survival of the prosthesis. Following the introduction of the first successful implant in THA, there has been great progress in implant production, by increasing the power and reducing the friability and wear of the bearing surfaces. The wear particles can remain in the host tissue, generate osteolysis and reduce the implant survival. These problems with bearing surfaces have led to creation of other bearing surfaces such as metal-on-polyethylene, metal-on-metal, ceramic-on-ceramic and ceramic-on-polyethylene with improved characteristics. Such types of implants can be used for young and more active patient, in addition to the elderly who is less active. In the present review, the different type of bearing surfaces with their advantages and disadvantages has been discussed.
Roshanak Jazayeri, MD; Mohammad Qoreishi, MD; Hamid Reza Seyyed Hoseinzadeh, MD; Mojgan Babanejad, MS; Enayatollah Bakhshi, PhD; Hossein Najmabadi, PhD; Seyyed Mohammad Jazayeri, MD
Abstract
Background: Osteoarthritis (OA) is a degenerative disease of the joints. The asporin (ASPN) gene encodes a cartilage extracellular protein belonging to the small leucine-rich proteoglycan family. Polymorphisms in the aspartic acid (D) repeat are associated with OA susceptibility. The D14 allele is associated ...
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Background: Osteoarthritis (OA) is a degenerative disease of the joints. The asporin (ASPN) gene encodes a cartilage extracellular protein belonging to the small leucine-rich proteoglycan family. Polymorphisms in the aspartic acid (D) repeat are associated with OA susceptibility. The D14 allele is associated with increased OA susceptibility in the Japanese and the Han Chinese but is not an important factor in OA etiology among Caucasians, though the D15 allele is a risk factor for the Greek population. In this study, the effect of ASPN on Iranian with knee OA is investigated.
Methods: 100 knee OA patients (72 female, 28 male) in a training hospital in Tehran, Iran were compared with 100 controls with no sign of OA, and the allelic association of the D-repeat polymorphism was studied in two groups.
Results: There were some minor differences in the frequencies of the D14 and D15 alleles between patient and control groups. These differences were, however, significant only for females. In Iranian females, D15 allele was significantly associated with KOA (p < /em>=.045), and D14 allele was significantly protective from KOA (p < /em>=.032).
Conclusions: D15 allele could be considered a risk allele only for women (p=.045, OR=1.73, 95% CI=1.01-2.94) in the Iranian population. This association is in part similar to that finding for the Greek population.
Hamid Reza Seyyed Hosseinzadeh, MD; Ali Akbar Esmaieliejah, MD; Seyyed Morteza Kazemi, MD; Mohammad Reza Bigdeli, MD; Mohammad Ali Jalili, MD; Farivar Baghery, MD; Reza Zandi, MD; Seyyed Reza Aghapoor, MD;; Ali Akbar Esmaieliejah, MD; Alireza Eajazi, MD; Farshad Safdari, MSc
Abstract
Background: Unstable pelvic fractures are major orthopaedic injuries with high rates of morbidity and mortality. Open surgical stabilization is the standard treatment for a great number of them. Percutaneous surgical fixation has become an accepted treatment method in last several years. We would like ...
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Background: Unstable pelvic fractures are major orthopaedic injuries with high rates of morbidity and mortality. Open surgical stabilization is the standard treatment for a great number of them. Percutaneous surgical fixation has become an accepted treatment method in last several years. We would like to report our experience with this relatively, newer technique in a small mixed group of unstable pelvic ring fractures.Methods: This is a report of 16 cases (13 males, 3 females) with mean age of 31±8 years of pelvic and acetabular fractures who received percutaneous iliosacral or iliopubic screw fixation, under C-arm imaging control, and had a 6 months period of clinical and radiographic follow-up.Results: All 16 cases had healed their fractures at follow-up and had full weight-bearing status. 12 cases returned to their pre-fracture activities. One screw break and one wound infection were the complications list. There was no neurological deficit, and average blood loss was 10 milliliters.Conclusion: Percutaneous iliosacral or iliopubic screw fixation for, respectively, posterior pelvic ring or anterior column acetabular injuries are useful surgical treatment options with low complication rates.
Hamid Reza Seyyed Hosseinzadeh, MD; Ali Akbar Esmaieliejah MD; Seyyed Reza Aghapoor, MD; Reza Zandi, MD; Mohmmad Reza Bigdeli, MD; Ali Aidenlo, MD; Jaafar Tavakolian, MD; Ali Akbar Esmaieliejah MD; Seyyed Morteza Kazemi, MD
Abstract
Background: Dislocation of total hip arthroplasty may happen for different reasons. Abnormal acetabular orientation is a common reason for such occurance. We would like to report the effect of acetabular inclination on incidence of dislocation.Methods: In a cross-sectional study all cases of total hip ...
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Background: Dislocation of total hip arthroplasty may happen for different reasons. Abnormal acetabular orientation is a common reason for such occurance. We would like to report the effect of acetabular inclination on incidence of dislocation.Methods: In a cross-sectional study all cases of total hip arthroplasty performed in a 2-yaer interval in one educational hospital in Tehran, were followed and assessed for possible dislocation in a 18.1 months (3-25 months) of follow-up. The inclination angles of acetabular components were measured, and the relationship of dislocation with gender, age and this angle was evaluated.Results: 132 cases entered the study. 4 patients (3%) encountered dislocation and all 4 had inclination angles of over 50 degrees. Gerder did not seem to play an important role. Older age, however, was probably contributing to risk of dislocation.Conclusion: Inclination angle of over 50 degree in acetabular component position is one of the factors making it more likely for the hip arthroplasty to dislocate.
Sohrab Keihani, MD; Ali Akbar Esmaieliejah, MD; Mohammad Reza Abbassian, MD; Seyyed Morteza Kazemi, MD; Ali Akbar Esmaieliejah, MD; Hamid Reza Seyed Hosseinzadeh, MD; Amer Sadeghi, MD
Abstract
Background: Medial opening-wedge valgus high tibial osteotomy has gained popularity. However, the reported complication rate is high. The technique has been modified to remedy the problems of patellar descent and alteration in angle of the inclination of the tibial plateau and delayed :::union:::. Our ...
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Background: Medial opening-wedge valgus high tibial osteotomy has gained popularity. However, the reported complication rate is high. The technique has been modified to remedy the problems of patellar descent and alteration in angle of the inclination of the tibial plateau and delayed :::union:::. Our aim is to compare the modified retrotubercle opening-wedge osteotomy with the conventional technique.Methods: In a clinical trial study, 72 consecutive patients with varus knees who were candidates for high tibial valgus osteotomy were, randomly treated with either conventional medial opening-wedge upper tibial osteotomies (34 patients) or retrotubercle opening-wedge osteotomies (38 patients) from Feb 2006 to Feb 2008. These matched cases were evaluated for patellar height and upper tibial slope as well as tibial inclination measurements. The intra and inter-observer reliability of the radiographic measures were also assessed before surgery and in a mean follow up of 13 months (10-21 months).Results: In retrotubercle open-wedge osteotomies no surgical change in patellar length or any patellar infra was seen. The tibial plateau inclination also showed no significant change from the pre-operative values. On the other hand, the conventional medial open-wedge technique showed significant reduction in patellar height as well as increase in tibial plateau inclination as compared to pre-operative values.Conclusion: In high tibial valgus osteotomies for genu varum retrotubercle medial open-wedge osteotomy negates the ill-effect of conventional open-wedge osteotomy in producing patella infra or increased tibial plateau slope or change in Q-angle of quadriceps mechanism.
