Restoration of fracture alignment by osteotomy is crucial for the management of humeral nonunion. In the present study, we introduced a new way of osteotomy (Z-shaped) in treating humeral shaft nonunion secondary to f...Restoration of fracture alignment by osteotomy is crucial for the management of humeral nonunion. In the present study, we introduced a new way of osteotomy (Z-shaped) in treating humeral shaft nonunion secondary to failed plate osteosynthesis. Clinical data of 24 patients with humeral shaft nonunion following implant failure (from 2010 to 2014) were retrospectively evaluated. These patients underwent Z-shaped osteotomy in revision surgery after the initial surgery, plate osteosynthesis, was failed. Outcomes were evaluated using visual analogue scale (VAS) and Constant and Murley score. Repeated analysis of variance (ANOVA) was used for statistical analysis. Patients were followed up for a minimum of 24 months (26.83±4.33 months). The operative time was 102.33±10.16 min, and hospital stay averaged 9.75±2.13 days. All patients achieved clinical union at the latest follow-up. Complications included radial palsy (n=1) and superficial wound infection (n=1). The postoperative VAS scores decreased significantly compared to preoperative score (F=257.99, P<0.01). Constant and Murley score increased and reached 81.33±0.95 at 24 months' follow-up 0=247.35, P<0.01). Among all the cases, 15 cases were graded as "excellent", and 9 as "good". In conclusion, Z-shaped osteotomy was easy to perform, and it provided additional medial support with more bone contact areas. Revision surgery using locking plate and Z-shaped osteotomy achieved high union rate and improved functional outcome. It was a reasonable and safe option for treating humeral nonunion following implant failure.展开更多
We investigate the effects of a bar on optical transmission through Z-shaped metallic slit arrays by using the finite- difference time domain （FDTD） method. A new hybrid Fabry-Perot （FP） surface plasmon polariton ...We investigate the effects of a bar on optical transmission through Z-shaped metallic slit arrays by using the finite- difference time domain （FDTD） method. A new hybrid Fabry-Perot （FP） surface plasmon polariton （SPP） mode emerges when changing the geometric parameters of the bar, and this mode can be viewed as a coupling between FP mode and SPP mode. In addition, an obvious dip appears in a featured area when the bar deviates from the central line, and a small displacement of the bar leads to tremendous change of the dip. These behaviors can be attributed to the phase resonance. In short, the structure is very sensitive to the metal bar. Furthermore, it combines photonic device miniaturization with sensitivity, which is useful for making optical switches.展开更多
In this work,the electronic transport properties of Z-shaped silicene nanoribbon（ZsSiNR） structure are investigated.The calculations are based on the tight-binding model and Green＇s function method in Landauer-Biit...In this work,the electronic transport properties of Z-shaped silicene nanoribbon（ZsSiNR） structure are investigated.The calculations are based on the tight-binding model and Green＇s function method in Landauer-Biittiker formalism,in which the electronic density of states（DOS）,transmission probability,and current-voltage characteristics of the system are calculated,numerically.It is shown that the geometry of the ZsSiNR structure can play an important role to control the electron transport through the system.It is observed that the intensity of electron localization at the edges of the ZsSiNR decreases with the increase of the spin-orbit interaction（SOI） strength.Also,the semiconductor to metallic transition occurs by increasing the SOI strength.The present theoretical results may be useful to design silicene-based devices in nanoelectronics.展开更多
Rationale: Webbed scar contractures deformity caused by burns and other factors will lead to joint disorders and affect the mental health of patients, resulting in a severe decline in quality of life. Rapid, effective...Rationale: Webbed scar contractures deformity caused by burns and other factors will lead to joint disorders and affect the mental health of patients, resulting in a severe decline in quality of life. Rapid, effective and less complicated surgical methods can help patients with post-burn rehabilitation. Objective: This article argues that a modified Z-plasty can quickly improve the range of motion caused by webbed scar contractures in joint areas, including surgical methods, postoperative care and prognosis. Methods and Results: The study took place from 2018 to 2022. Thirty-two patients with joint scar contracture deformity, with a mean age of 32.5 years, were included in the study. All patients underwent contracture scar revision and modified Z-plasty repair under anesthesia. All the flaps survived and the joint function was improved. Compared with the traditional Z-plasty, the duration of the operative procedure of the modified Z-plasty was significantly shorter, more surrounding scar tissue was mobilized, and the effectiveness of postoperative scar contracture release was better. Discussions: The modified Z-plasty for scar contracture deformity in joint area is simple, rapid, effective and easy to manage.展开更多
文摘Restoration of fracture alignment by osteotomy is crucial for the management of humeral nonunion. In the present study, we introduced a new way of osteotomy (Z-shaped) in treating humeral shaft nonunion secondary to failed plate osteosynthesis. Clinical data of 24 patients with humeral shaft nonunion following implant failure (from 2010 to 2014) were retrospectively evaluated. These patients underwent Z-shaped osteotomy in revision surgery after the initial surgery, plate osteosynthesis, was failed. Outcomes were evaluated using visual analogue scale (VAS) and Constant and Murley score. Repeated analysis of variance (ANOVA) was used for statistical analysis. Patients were followed up for a minimum of 24 months (26.83±4.33 months). The operative time was 102.33±10.16 min, and hospital stay averaged 9.75±2.13 days. All patients achieved clinical union at the latest follow-up. Complications included radial palsy (n=1) and superficial wound infection (n=1). The postoperative VAS scores decreased significantly compared to preoperative score (F=257.99, P<0.01). Constant and Murley score increased and reached 81.33±0.95 at 24 months' follow-up 0=247.35, P<0.01). Among all the cases, 15 cases were graded as "excellent", and 9 as "good". In conclusion, Z-shaped osteotomy was easy to perform, and it provided additional medial support with more bone contact areas. Revision surgery using locking plate and Z-shaped osteotomy achieved high union rate and improved functional outcome. It was a reasonable and safe option for treating humeral nonunion following implant failure.
基金Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20100162110068)the National Natural Science Foundations of China (Grant Nos. 61275174 and 11164007)
文摘We investigate the effects of a bar on optical transmission through Z-shaped metallic slit arrays by using the finite- difference time domain （FDTD） method. A new hybrid Fabry-Perot （FP） surface plasmon polariton （SPP） mode emerges when changing the geometric parameters of the bar, and this mode can be viewed as a coupling between FP mode and SPP mode. In addition, an obvious dip appears in a featured area when the bar deviates from the central line, and a small displacement of the bar leads to tremendous change of the dip. These behaviors can be attributed to the phase resonance. In short, the structure is very sensitive to the metal bar. Furthermore, it combines photonic device miniaturization with sensitivity, which is useful for making optical switches.
基金Project supported by the Sari Branch,Islamic Azad University,Iran Grant No.1-24850
文摘In this work,the electronic transport properties of Z-shaped silicene nanoribbon（ZsSiNR） structure are investigated.The calculations are based on the tight-binding model and Green＇s function method in Landauer-Biittiker formalism,in which the electronic density of states（DOS）,transmission probability,and current-voltage characteristics of the system are calculated,numerically.It is shown that the geometry of the ZsSiNR structure can play an important role to control the electron transport through the system.It is observed that the intensity of electron localization at the edges of the ZsSiNR decreases with the increase of the spin-orbit interaction（SOI） strength.Also,the semiconductor to metallic transition occurs by increasing the SOI strength.The present theoretical results may be useful to design silicene-based devices in nanoelectronics.
文摘Rationale: Webbed scar contractures deformity caused by burns and other factors will lead to joint disorders and affect the mental health of patients, resulting in a severe decline in quality of life. Rapid, effective and less complicated surgical methods can help patients with post-burn rehabilitation. Objective: This article argues that a modified Z-plasty can quickly improve the range of motion caused by webbed scar contractures in joint areas, including surgical methods, postoperative care and prognosis. Methods and Results: The study took place from 2018 to 2022. Thirty-two patients with joint scar contracture deformity, with a mean age of 32.5 years, were included in the study. All patients underwent contracture scar revision and modified Z-plasty repair under anesthesia. All the flaps survived and the joint function was improved. Compared with the traditional Z-plasty, the duration of the operative procedure of the modified Z-plasty was significantly shorter, more surrounding scar tissue was mobilized, and the effectiveness of postoperative scar contracture release was better. Discussions: The modified Z-plasty for scar contracture deformity in joint area is simple, rapid, effective and easy to manage.
