Dynamic hip screw in the treatment of intertrochanteric fractures: a comparison of two fixation methods.
Ontology highlight
ABSTRACT:
SUBMITTER: Lee YS
PROVIDER: S-EPMC2266650 | biostudies-other | 2007 Oct
REPOSITORIES: biostudies-other
Similar Datasets
Project description:We report a randomised prospective study comparing two implants, the Gamma trochanteric nail and the ACE trochanteric nail, in the treatment of intertrochanteric femoral fractures in the elderly. One hundred and twelve patients were randomised on admission into two treatment groups. Fifty-six patients were treated with Gamma nail implants, and 56 were treated with ACE trochanteric nail. The average age of these patients was 78 years. Twenty fractures were stable and 92 unstable. The mean follow-up time was 8 months (6 -12). Regular clinical and radiological review was done 1, 3 and 6 months postoperatively. Operation time, fluoroscopy time, blood transfusion and complications were recorded. The mobility score was used to assess the pre-injury and postoperative mobility status. All the patients were treated within 36 h of their accident. There were no complications during surgery. All the patients were mobilised in the first 24 h postoperatively, regardless of the fracture type, and weight bearing was permitted as tolerated. Union of the fracture was achieved in all patients. There was no statistically significant difference between the two groups with regard to the studied parameters. There was no mechanical failure of the implants despite the early patient mobilisation. Early operation and early mobilisation resulted in a good functional outcome in all patients. Both the trochanteric gamma nail and ACE trochanteric nail provide effective methods of treatment for intertrochanteric fractures in elderly patients.
| S-EPMC2267541 | biostudies-other
Project description:BackgroundThe aim of this meta-analysis was to evaluate the advantages and disadvantages of proximal femoral nail anti-rotation (PFNA) versus dynamic hip screw (DHS) for the treatment of unstable intertrochanteric fractures, including the available evidence drawn from the literature.MethodsA systematic search was conducted to identify available and relevant randomized controlled trials and retrospective comparative observational studies regarding PFNA compared against DHS in treating unstable femoral intertrochanteric fractures in Embase, PubMed, Cochrane Library, Web of Science, and Scopus Online up to February 12, 2022. Data from the included studies were extracted independently by 2 reviewers and analyzed using RevMan 5.3, and the quality of the studies was assessed.ResultsFive randomized controlled trials and 12 observational studies were recruited and met the inclusion criteria, which consisted of 1332 patients with PFNA and 1271 patients with DHS. The results of the meta-analysis showed that, compared with the DHS, PFNA exhibited a beneficial role in postoperative Harris Hip Scores, operation time, intraoperative blood loss, length of hospital stay, fracture healing time and full weight-bearing time, limb shortening, cutout, reoperation, union problems, the varus collapse of the femoral head/neck, and infection; however, DHS was superior to PFNA in hidden blood loss (relative risk [RR] = 139.81, 95% confidence interval [CI] [136.18, 143.43], P < .00001), postoperation drainage (RR = -17.85, 95% CI [-30.10, -5.60], P = .004), total blood loss (RR = 50.34, 95% CI [42.99, 57.69], P < .00001), and femoral shaft fracture (RR = 4.72, 95% CI [1.15, 19.32], P = .03) treated by DHS were significantly decreased, compared with those by PFNA; however, no significant differences were observed in tip-apex distance, fixation failures, screw migration, or other complicants between the 2 surgical methods.ConclusionAnalysis of a large number of relevant clinical indicators available shows that PFNA has better clinical manifestation than DHS in treating unstable femoral intertrochanteric fractures.
| S-EPMC9907998 | biostudies-literature
Project description:Background:Common failure modes of dynamic hip screw are cut-out and lift-off. To minimize the latter, distal screws can be inserted in different orientations. However, the effectiveness remains controversial. The aim of this study was to biomechanically investigate the influence of distal screw orientation on construct stability. Methods:Thirty artificial generic long bones were assigned to three groups (n = 10) and fixed with two-hole dynamic hip screw-plates, inserting distal cortical screws with neutral parallel screw orientation (A), divergent screw orientation (B) or convergent screw orientation (C). Starting at 60 N, cyclic loading was applied to the implant tip perpendicular to the lag screw axis with progressive peak load increase at a rate of 0.002 N/cycle until failure. Parameters of interest were construct stiffness and machine actuator displacement after 250, 1000 and 5000 cycles, as well as cycles to failure. Results:Displacement after 250, 1000 and 5000 cycles was significantly higher in Group C than in Groups A and B, p < 0.01, whereas no significant differences were observed between Groups A and B, p = 0.20. Specimens in Group C failed after 11,584 [standard deviation (SD), 5924] cycles, significantly earlier than those in Groups A and B [A: 27,351 (SD, 12,509); B: 28,793 (SD, 14,764)], p ? 0.02. Cycles to failure were not significantly different between Groups A and B, p > 0.99. The translational potential of this article:Parallel or divergent distal screw insertion provides similar construct stability in terms of resistance to plate lift-off. In contrast, converging screw insertion leads to inferior stability and is not advisable from a biomechanical point of view.
| S-EPMC6718874 | biostudies-literature
Project description:BackgroundThe newly developed monoplanar pedicle screws (MPPSs) can mobile in axial plane but fixed in the sagittal plane, which holds potential to combine ease of rod placement with sagittal plane strength theoretically. So far, few clinical studies focused on the outcomes of MPPSs for treatment of thoracolumbar fractures (TLFs). The aim of this study was to compare the efficacy of MPPSs to polyaxial pedicle screws (PAPSs) in percutaneous intermediate fixation of TLFs.MethodsSeventy-eight patients who sustained TLFs without neurological deficits and underwent percutaneous intermediate fixation using MPPSs (40 patients) or PAPSs (38 patients) with a minimum 1-year follow-up were included in this study. The operation time, blood loss, local Cobb angle (LCA), vertebral wedge angle (VWA), anterior body height ratio (ABHR), visual analogue scale (VAS) and Oswestry Disability Index (ODI) were collected.ResultsNo significant differences were observed in baseline demographics, clinical characteristics, operation time or blood loss between the two groups (P > 0.05). The postoperative LCA, VWA and ABHR were significantly corrected compared to these parameters preoperatively in both groups (#P < 0.05). The postoperative LCA, VWA and ABHR in the MPPS group were significantly better corrected than those in the PAPS group (*P < 0.05). Furthermore, the correction loss of LCA, VWA and ABHR in the MPPS group was significantly lower than that in the PAPS group (*P < 0.05). However, no significant difference in VAS and ODI scores was observed between the two groups.ConclusionsMPPSs showed similar efficiency as PAPSs in percutaneous intermediate fixation surgical procedures. More importantly, MPPSs achieved better radiological performance than PAPSs in the correction of TLFs and the prevention of correction loss.
| S-EPMC8864839 | biostudies-literature
Project description:BackgroundThe best treatment for intertrochanteric hip fractures is controversial. The use of cephalomedullary nails has increased, whereas use of sliding hip screws has decreased despite the lack of evidence that cephalomedullary nails are more effective. As current orthopaedic trainees receive less exposure to sliding hip screws, this may continue to perpetuate the preferential use of cephalomedullary nails, with important implications for resident education, evidence-based best practices, and healthcare cost.Questions/purposesWe asked: (1) What are the current practice patterns in surgical treatment of intertrochanteric fractures among orthopaedic surgeons? (2) Do surgical practice patterns differ based on surgeon characteristics, practice setting, and other factors? (3) What is the rationale behind these surgical practice patterns? (4) What postoperative approaches do surgeons use for intertrochanteric fractures?MethodsA web-based survey containing 20 questions was distributed to active members of the American Academy of Orthopaedic Surgeons. Three thousand seven-hundred eighty-six of 10,321 invited surgeons participated in the survey (37%), with a 97% completion rate (3687 of 3784 responded to all questions in the survey). The survey elicited information regarding surgeon demographics, preferred management strategies, and decision-making rationale for intertrochanteric fractures.ResultsSurgeons use cephalomedullary nails most frequently for treatment of intertrochanteric hip fractures. Sixty-eight percent primarily use cephalomedullary nails, whereas only 19% primarily use sliding hip screws, and the remaining 13% use cephalomedullary nails and sliding hip screws with equal frequency. The cephalomedullary nail was the dominant approach regardless of experience level or practice setting. Surgeons who practiced in a nonacademic setting (71% versus 58%; p < 0.001), did not supervise residents (71% versus 61%; p < 0.001), or treated more than five intertrochanteric fractures a month (78% versus 67%; p < 0.001) were more likely to use primarily cephalomedullary nails. Of the surgeons who used only cephalomedullary nails, ease of surgical technique (58%) was cited as the primary reason, whereas surgeons who used only sliding hip screws cite familiarity (44%) and improved outcomes (37%) as their primary reasons. Of those who use only short cephalomedullary nails, ease of technique (59%) was most frequently cited. Postoperatively, 67% allow the patient to bear weight as tolerated. Nearly all respondents (99.5%) use postoperative chemical thromboprophylaxis.ConclusionsDespite that either sliding hip screw or cephalomedullary nail fixation are associated with equivalent outcomes for most intertrochanteric femur fractures, the cephalomedullary nail has emerged as the preferred construct, with the majority of surgeons believing that a cephalomedullary nail is easier to use, associated with improved outcomes, or is biomechanically superior to a sliding hip screw. The difference between what is evidence-based and what is done in clinical practice may be attributed to several factors, including financial considerations, educational experience, or inability of our current outcomes measures to reflect the experiences of surgeons. The educators, researchers, and policymakers among us must work harder to better define the roles of sliding hip screws and cephalomedullary nails and ensure that the increasing population with hip fractures receives high-quality and economically responsible care.Level of evidenceLevel V, therapeutic study.
| S-EPMC4586189 | biostudies-literature
Project description:BackgroundSix risk factors for screw cutout after internal fixation of intertrochanteric fractures have been reported. The purpose of the present study was to evaluate and compare the impact of the 6 risk factors of screw cutout to clarify the most important one.MethodsWe enrolled 8 consecutive patients who had screw cutout and 48 random control subjects after internal fixation of intertrochanteric fractures treated with proximal femoral nail antirotation systems at our institution. All of the patients were female. The group that had screw cutout and the control group were retrospectively evaluated and compared with respect to the OTA/AO classification, presence of a posterolateral fragment, types of reduction pattern on anteroposterior and lateral radiographic images, position of the screw, and the presence of a tip-apex distance (TAD) of ≥20 mm. The impact of each factor on screw cutout was assessed using backward stepwise multivariable logistic regression analysis with the Akaike information criterion. Risk stratification was assessed using classification and regression tree (CART) analysis.ResultsAmong 6 risk factors, only a TAD of ≥20 mm had a significant impact on screw cutout, with an adjusted odds ratio of 12.4 (95% confidence interval, 1.6 to 129.0; p = 0.019). CART analysis also demonstrated that a TAD of ≥20 mm was the most important risk stratification factor (p < 0.001).ConclusionsAmong the 6 previously reported screw cutout-related factors, only a TAD of ≥20 mm was associated with screw cutout after internal fixation of intertrochanteric fractures with proximal femoral nail antirotation systems.Level of evidenceTherapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.
| S-EPMC6133149 | biostudies-literature
Project description:Purpose:Intertrochanteric (IT) hip fractures can be treated with sliding hip screws (SHS) or cephalomedullary nails (CMN) based on the stability of the fracture. This stability is affected by the initial impaction of the fracture which can be difficult to assess. The aim of this paper is to develop specific pre-operative computed tomography (CT) measurements of IT fractures which are predictive of post-operative shortening. Methods:A retrospective review was performed of 141 patients with AO/OTA 31A1 or 31A2 fracture patterns, who had pre-operative radiographs and CT scans, and who were treated with a SHS or a CMN. Pre-operative and post-operative imaging of IT fractures were analyzed for those fractures that shortened ?15?mm post-fixation. Results:11 fractures shortened ?15?mm with CMN being protective of shortening (6/36 SHS versus 5/105 CMN, p?=?0.0268). A novel measurement made on the pre-operative CT scan called the cortical thin point (CTP) detected differences between patients with <15?mm and ?15?mm of post-operative shortening for the SHS group (p?=?0.0375). CTP was found to be a reliable predictor for post-operative shortening of ?15?mm when a cutoff threshold of 9?mm was used in the SHS group (p?=?0.0161). Conclusions:Measuring the CTP is predictive of post-operative shortening after fixation of an IT fracture with a SHS. CMN fixation may be protective of shortening. Patients with a CTP of ?9?mm are at risk for fracture site shortening of more than 15?mm when treated with a SHS.
| S-EPMC6134156 | biostudies-literature
Project description:The aim of this non-randomised prospective study was to evaluate the short-term outcome of Gamma nail and dynamic hip screw (DHS) fixation in the treatment of subtrochanteric hip fractures due to low-energy trauma in the elderly. All of the 1,624 femoral hip fractures in 1,511 patients of the Oulu Hospital, aged over 49 years, were prospectively registered from 1991-1999 using special forms. Seventy-three (4.5%) of the fractures were subtrochanteric. After exclusions, 58 patients constituted the final study group. Of these, 43 were treated with Gamma nails and 15 with DHS. Background factors before the fracture, complications, reoperations and functional parameters at 4 months were recorded using standardised forms. Intraoperative and hospital data were collected from patient records. The Seinsheimer fracture types IIIA, IIC and V were the most common fracture patterns when the Seinsheimer classification system was used, and Fielding II and AO 31A3.3, respectively, were the most common types in the Fielding and AO classification system. There were four (9%) intraoperative complications in the Gamma nail group as compared to none in the DHS group. On the other hand, postoperative complications were more common in the DHS group (27%) than in the Gamma nail group (7%). We recognised a correlation between certain fracture types and the likelihood of typical intra- or postoperative complications or difficulties with both devices: In Gamma nailing, difficulty in closed reduction as well as the rate of open reduction and the use of supplementary fixation were most frequent in the Seinsheimer IIC fractures. It is also noticeable that all of the postoperative device failures and fracture displacements of the DHS group occurred in the Seinsheimer type IIIA category. Detailed fracture classification is essential for the choice of the fixation device, and the present study confirms the presumption that, despite the perioperative problems associated with Gamma nailing, this technique may be preferable to plate fixation for specific fracture types with medial cortical comminution, such as Seinsheimer type IIIA.
| S-EPMC2267546 | biostudies-other
Project description:Vertical femoral neck fractures in patients younger than 65 years of age often require hip-conserving surgeries. However, traditional fixation strategies using three parallel cannulated screws often fail in such patients due to an unfavorable biomechanical environment. This study compared different cannulated screw fixation techniques in patients via patient-specific finite element analysis with linear tetrahedral (C3D4) elements. Forty vertical femoral neck fracture models were created based on computed tomography images obtained from eight healthy participants. Five different fixation strategies: alpha, buttress, rhomboid, inverted triangle, and triangle were assessed in walking status. Biomechanical parameters including stiffness, interfragmentary motion in two directions (detachment and shearing), compression force, and maximal implant stress were evaluated. The mean relative coefficient of strain distribution between the finite element analysis and experiment was from 0.78 to 0.94. Stiffness was highest (p < .05) in the buttress group (923.1 N/mm), while interfragmentary motion was lowest (p < .05) in the alpha group. Maximal stress was highest (p < .05) in the buttress group and lowest in the alpha group. Shearing values were significantly lower in the alpha group than in the rhomboid group (p = .004). Moreover, Shearing values were significantly higher (p = .027), while detachment values were significantly lower (p = .027), in the inverted triangle than in the triangle group. Clinical significance: Our results suggest that alpha fixation is the most reliable and biomechanically efficient strategy for young patients with vertical femoral neck fractures. Regular and inverted triangular fixation strategies may be suitable for fractures of different skeletal constructions due to antidetachment/shearing abilities.
| S-EPMC8451753 | biostudies-literature
Project description:Transverse glenoid fractures with a cranial coracoglenoidal fragment (Ideberg type III) can lead to detrimental post-traumatic sequelae. Open surgery requires an extensive surgical approach. Arthroscopic procedures are highly challenging with respect to both fracture reduction and screw osteosynthesis. We present a reproducible arthroscopic technique for a dislocated transverse glenoid fracture using 5 standard portals. Grasping the coracoid with a small, serrated reduction clamp through the anterior portal allows simple and sufficient reduction. Safe screw osteosynthesis can then be performed from cranially without the need to create a Neviaser portal.
| S-EPMC8626685 | biostudies-literature