Is the Cranial and Posterior Screw of the “Inverted Triangle” Configuration for Femoral Neck Fractures Safe?

While many femoral neck fractures can be reliably treated with surgical intervention, Pauwels III femoral neck fractures in the young adult population continue to be a challenging injury, and there is no consensus on optimal treatment. As such, there are past and ongoing biomechanical studies to evaluate the fixation provided by different constructs for this inherently unstable fracture. While many investigations rely on cadavers to evaluate the biomechanical performance of a construct, significant inter-subject variability can confound the analysis. Biomechanical femur analogs are being used more frequently due to more consistent mechanical properties; however, they have not been stringently evaluated for morphology or suitability for instrumentation. This study sought to determine the variability among composite femoral analogs as well as consistently create a Pauwels III injury and instrument the analogs without the need for fluoroscopic guidance. In total, 24 fourth-generation composite femoral analogs were evaluated for femoral height, neck–shaft angle, anteversion, and cortical thickness. A method was developed to simulate a Pauwels III fracture and to prepare three different constructs: an inverted triangle of cannulated screws, a sliding hip screw, and a hybrid inverted triangle with cannulated screws and a sliding hip screw. Radiographs were utilized to evaluate the variation in implant position. All but one of the morphological parameters varied by <1%. The tip-to-apex distance for all sliding hip screw hardware was 18.8 ± 3.3 mm, and all relevant cannulated screw distances were within 5 mm of the adjacent cortex. All screws were parallel, on average, within 1.5° on anterior–posterior and lateral films. Fourth-generation composite femora were found to be morphologically consistent, and it is possible to consistently instrument the analogs without the use of fluoroscopy. This analog and hardware implantation model could serve as a screening model for new fracture repair constructs without the need for cadaveric tissues or radiologic technology.

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Outcome of non-operative management in Garden I femoral neck fractures

Yearbook of Orthopedics ◽

10.1016/s0276-1092(08)70078-6 ◽

2007 ◽

Vol 2007 ◽

pp. 76-77

Author(s):

M.F. Swiontkowski

Keyword(s):

Femoral Neck ◽

Operative Management ◽

Femoral Neck Fractures ◽

Non Operative Management

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Association of QCT bone strength and soft tissue thickness with trochanteric and femoral neck fractures in Older Men

RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren ◽

10.1055/s-0032-1329751 ◽

2012 ◽

Vol 184 (12) ◽

Author(s):

J Borggrefe ◽

T de Buhr ◽

S Shrestha ◽

C Nielson ◽

E Orwoll ◽

...

Keyword(s):

Soft Tissue ◽

Femoral Neck ◽

Bone Strength ◽

Older Men ◽

Femoral Neck Fractures ◽

Tissue Thickness ◽

Soft Tissue Thickness

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HIP FRACTURES IN 5 YEARS AT HUE UNIVERSITY HOSPITAL

Journal of Medicine and Pharmacy ◽

10.34071/jmp.2013.6.8 ◽

2014 ◽

pp. 47-50

Author(s):

Duy Binh Ho ◽

Nghi Thanh Nhan Le ◽

Maasalu Katre ◽

Koks Sulev ◽

Märtson Aare

Keyword(s):

Hip Fracture ◽

Femoral Neck ◽

Hip Fractures ◽

Age Groups ◽

Femoral Fractures ◽

Femoral Neck Fractures ◽

University Hospital ◽

High Risk Population ◽

Intertrochanteric Fractures ◽

Significant Difference

Aim: This study aimed to review the clinical findings and surgical intervention of the hip fracture at the Hue University Hospital in Vietnam. Methods:The data of proximal femoral fractures was collected retrospectively. All patients, in a period of 5 years, from Jan 2008 to December 2012, suffered either from intertrochanteric or femoral neck fractures. The numbers of patients were gathered separately for each year, by age groups (under 40, 40-49, 50-59, 60-69, 70-79, older) and by sex. We analyzed what kind of treatment options were used for the hip fracture. Results:Of 224 patients (93 men and 131 women) studied, 71% patients are over 70 years old, 103 women and 56 men (p<0.05). For patients under 40 years, there were 1 woman and 11 men (p<0.05). There were 88 intertrochanteric and 136 femoral neck fractures. There was no significant difference in the two fractures between men and women. The numbers of hip fracture increased by each year, 29/224 cases in 2010, 63/224 cases in 2011, 76/224 cases in 2012. Treatment of 88 intertrochanteric fractures: 49 cases (55.7%) of dynamic hip screw (DHS), 14 cases of hemiarthroplasty (15.9%), 2 cases of total hip replacement (2.3%). Treatment of 136 femoral neck fractures: 48 cases of total replacement (35.3%), 43 cases of hemiarthroplasty (31.6%), 15 cases of screwing (11%). In cases of 40 patients (17.9%) hip fracture was managed conservatively, 23 were femoral neck fractures and 17 were intertrochanteric fractures. Conclusions: Hip fracture is growing challenge in Hue medical university hospital. The conservative approach is still high in people who could not be operable due to severe medical conditions as well as for patients with economic difficulties. Over 70% of the hip fractures in people 70+ are caused by osteoporosis. The number of hip fracture is increasing in the following years, most likely due to the increase in the prevalence of osteoporosis. Early detection and prevention of osteoporosis should be addressed, particularly in high risk population. More aggressive surgical approach should be implemented in order to improve the quality of life in patients with hip fractures. Key words:Hip fracture.

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