Extramedullary Method Research Articles

TO EVALUATE RADIOLOGICAL AND FUNCTIONAL OUTCOMES OF INTRAMEDULLARY OSTEOSYNTHESIS OF SUBTROCHANTERIC FEMUR FRACTURES IN ADULTS WITH LONG PROXIMAL FEMORAL NAIL

Background: The subtrochanteric fractures accounts for 10-34% of hip fractures. Operative treatment is gold standard in adults in view of anatomical location, deforming forces & vascularity issues. Intramedullary device are less invasive, more biological & mechanically stable whereras extramedullary methods achieves better anatomical reduction but at the expense of vascularity. However, there is still no consensus over the methodology for being the best for these fractures. Objective: To evaluate clinical, functional and radiological outcomes of intramedullary osteosynthesis of subtrochanteric femur fractures in adults with long PFN. Methods: A prospective randomized control study was conducted on total 30 patients of subtrochanteric fractures and treated with long proximal femoral nail (PFN). All the patients were followed up for a maximum of 24 weeks. Outcomes were observed & analysed such as tip apex distance, duration of surgery, complications, functional and radiological outcomes. Results: The average age of patients was 43.6 years ±13.26. Left sided fracture were more than right sided fracture. The most common type of fracture as per AO-ASIF classication was 32-C3 (53.33%). In 21 patients compression screw used was 95mm or above. Derotation screw of size 85mm or above were inserted in 19 patients. Mean TAD of compression screw and derotation screw was 11.59 and 13.81 respectively. Closed reductions was achieved in 27 patients. Mean surgical time was 157 minutes. Mean radiological union time of fracture was 14.16 weeks. Mean Harris hip score at 24 weeks was 84.56. Conclusions: It is concluded that intramedullary xation by long PFN is a sound and effective modality for the subtrochanteric fractures. Subchondral xation of both proximal screws probably has led to better stable xation with hundred percent union rates and no implant failure.

Comparative analysis of operation time and intraoperative fluoroscopy time in intramedullary and extramedullary fixation of trochanteric fractures

Background/Aim. Cephalomedullary and extramedullary methods are used for the internal fixation of trochanteric fractures. The usage of the third generation Gamma Nail (GN) is a gold standard in this kind of treatments. Self-dynamisable Internal Fixator (SIF) is an extramedullary implant for trochanteric fractures? treatment. The aim of this study was to compare these two methods regarding operation time and intraoperative fluoroscopy time. Methods. A total of 89 patients with a surgical treatment of a trochanteric fracture were included in this study. There were two groups of patients ? GN group (43 patients) and SIF group (46 patients). Results. Average operation times were 67.5 min (GN group) and 56.0 min (SIF group). Average intraoperative fluoroscopy times were 84.8 s (GN group) and 36.7 s (SIF group). The difference between the groups was statistically significant for both of the given parameters (p < 0.05). The correlation between operation time and intraoperative fluoroscopy time was confirmed in the SIF group (p < 0.05; r = 0.405), while it was not confirmed in the GN group (p > 0.05). There was a higher variability in the GN method than in the SIF method regarding the duration and type of repeated surgical maneuvers followed by X-ray checks. Conclusion. The number of planned surgical interventions per day could depend on the type of trochanteric fracture internal fixation (intramedullary or extramedullary). Certain additional analyses including radiation dose assessment are desirable to clarify if shorter intraoperative fluoroscopy time in the SIF method can have the influence regarding intraoperative X-ray protection clothing. If there is the need to activate dynamization in long femoral axis after initial static fixation in that axis, the SIF method provides its spontaneous activation several weeks after the surgery without the need neither for additional surgery nor for additional intraoperative fluoroscopy

Twisted Plating - A Method of Distal Fibula Fixation.

Objective The literature entails various intramedullary and extramedullary methods for distal fibula fracture fixation; with no consensus yet over the ideal method of fixation. We have retrospectively analyzed the results of using a twisted and contoured 3.5 mm locking compression plate (LCP) as a posterior buttress plate. Methods Of the 62 cases with ankle fractures managed at our institute by the senior author from 1 st January 2012 to 31 st December 2015, 41 patients met our inclusion criteria (Danis-Weber types B and C). Results All 41 distal fibular fractures healed uneventfully, at a mean of 10.4 weeks (8–14 weeks) (Figs. 6, 7, 8 to 9) with no complications. The mean American Orthopaedic Foot & Ankle Society (AOFAS) score was 92.6 (86–100) at a mean follow-up of 31.5 months (14–61 months). Conclusions We have achieved excellent clinical and radiological outcomes using a twisted 3.5 mm LCP as a posterior buttress by combining the advantages of posterior antiglide plating and lateral LCP.

Hip function and health-related quality of life in intramedullary and extramedullary internal fixation of trochanteric fractures

Introduction/Objective. There are extramedullary and intramedullary methods of trochanteric fractures? internal fixation with implants having a lag screw. The objective of this study was to examine the difference in impact of these fixation types on final hip function and health-related quality of life. Method. There were 75 patients treated for a trochanteric fracture, using self-dynamisable internal fixator (SIF group), as an extramedullary method, or gamma nail (GN group), as an intramedullary method. These patients were called for the evaluation of Harris Hip Score (HHS) and SF-12 questionnaire at least two years after surgery. The SF-12 questionnaire has dual expression ? physical component score (PCS) and mental component score (MCS). Results. There were no significant differences between the SIF group and the GN group regarding HHS, PCS, and MCS. Positive correlation was confirmed between HHS, PCS, and MCS, with the strongest relation between HHS and PCS. Negative correlation was confirmed between age and HHS. Conclusion. There was no difference in final hip function and health-related quality of life between SIF and GN methods in trochanteric fractures treatment (p > 0.05). These parameters of outcome were confirmed to have positive interrelation (p < 0.05). Both submuscular presence of extramedullary implant with dimensions of SIF and the need for bone reaming in cephalomedullary fixation were considered not to have significant impact in HHS and SF-12 scores after trochanteric fractures treatment by internal fixation.

Femoral Component Alignment with a New Extramedullary Femoral Cutting Guide Technique.

Background:Intramedullary (IM) or extramedullary (EM) mechanical guides are used as alignment tools during total knee arthroplasty (TKA) surgery. The EM guide is less invasive; however, the IM mechanical guide is the preferred option since it has shown superior outcomes in several studies. Picture archive and communication system (PACS) images, if available, are extensively used for preoperative planning and intraoperative guidance. This retrospective study compared TKA outcomes using the conventional IM guide and a new EM technique which uses PACS image for preoperative and intraoperative assessment bone resection. To the best of our knowledge, this is the first study with the new EM technique.Materials and Methods:The study was performed on 205 knees (190 patients) for TKA from 2011 to 2013. The perioperative blood loss and the postoperative alignment angles were assessed for both mechanical guides. The angles were measured on the radiographs of the patient. The blood loss was assessed by the blood accumulated in the hemovac drain during the surgery and until 3 days after the surgery.Results:The new EM guide provided similar postoperative alignment as that obtained with the IM guide.Conclusion:The EM-guided method for femoral bone cutting using PACS films in TKA is as good as the IM method. The additional advantages of less injury to the bone and less fat emboli load to the cardiopulmonary system with the EM method makes it an attractive choice for routine, especially in the elderly and/or simultaneous bilateral, TKA in hospitals without modern computer-assisted navigation systems.

Intramedullary Fixation for Unstable Intertrochanteric fractures

Background: Intertrochanteric fractures of the hip are common fractures in the elderly. While the incidence of these fractures has actually decreased, the absolute increase in the elderly population has led to doubling the number of these fractures over the past three decades and this trend is expected to continue. Intramedullary fixation of these fractures gained popularity in the last few years because of its biomechanical superiority over extramedullary methods moreover less blood loss, operative time, x-ray exposure and hospital stay. Method: This study was performed on forty patients with unstable intertrochanteric fractures underwent fixation with intramedullary short Gamma nail generation three. Results: Functional outcome was assessed using Parker mobility score at 6 months and one year postoperative, 31(77.5%) patients had the same score as preoperative at 6 months and increased to 87.5% at one year. The most of cases 29(72.5%) had no complications. Conclusion: Our results recommend the use of intramedullary nail in the treatment of unstable trochanteric fracture after anatomical reduction.

Technical Considerations and Accuracy Improvement of Accelerometer-Based Portable Computer Navigation for Performing Distal Femoral Resection in Total Knee Arthroplasty

BackgroundAccelerometer-based computer navigation has been shown to be highly accurate for performing distal femoral and proximal tibial component alignment in total knee arthroplasty (TKA), although the procedure for the femoral component is less accurate than for the tibial component. MethodsFirst, 30 knees without hip osteoarthritis or proximal femoral surgeries were selected. Sequential hip adduction, abduction, and flexion were performed, and the femoral head was monitored fluoroscopically in the coronal plane before TKA. Significantly more movement was detected during hip adduction than during abduction and flexion. Then, postoperative femoral and tibial component alignment was retrospectively evaluated in 48 TKAs before fluoroscopic monitoring (early group) and in the next 61 TKAs with femoral registration using smaller adduction movements to avoid large femoral head movements (later group). Another 47 TKAs treated with the conventional intramedullary method for the distal femoral component and the extramedullary method for the proximal tibial component were also analyzed (IM and EM group) for historic control. ResultsSignificantly large variances in the femoral component implantation of the early group were detected in both the coronal and sagittal planes. The sagittal femoral implantation angle of the early group (4.6 ± 3.0°) was significantly larger than that of the later group (3.2 ± 1.8°) when 3.5° was the target for both groups. No significant difference was detected in the variances of either the coronal or sagittal tibial component implantation, although the coronal tibial implantation angle was significantly smaller (−1.3 ± 1.3°valgus) in the early group than in the other groups. ConclusionAccelerometer-based navigation sometimes has technical issues during registration associated with hip adduction. We showed that femoral registration without large adduction movements will enable more accurate femoral implantation. Surgeons should also keep in mind that the coronal tibial component is likely to be in valgus alignment (about 1°) even if a neutral angle (0°) is selected with this particular device.

Posterior slope of tibial plateau in Chinese

The posterior slope of tibial plateau in 25 pairs of Chinese cadaveric tibia was studied. A digital photograph of the lateral profile of each cadaveric tibia was taken, and the posterior slope angles of medial and lateral plateau relative to the anterior tibial cortex were measured. The posterior slope of the medial plateau was 14.8°, and the posterior slope of the lateral plateau was 11.8°. Lateral radiographs of each cadaveric tibia were taken, and the posterior tibial slope angles relative to simulated extramedullary and intramedullary alignment were determined. With radiographic measurement, the posterior slope was 11.5° using intramedullary method, and it was 14.7° using extramedullary method. The posterior slopes increased with the presence of degenerative changes