Introduction: Surgical fixation of intra-articular distal femoral fractures has been associated with nonunion & varus collapse. The soft tissuestripping associated with this fracture andthe surgical exposure have been factors associated with delayed union & infection. The limited soft tissue exposure has been lauded the as a solution to this fracture. However, it has occurred with the new fixation as well.(Locked Plate)

Aims: This study is an attempt to look at the fixation. Does the LISS system improve the results of this difficult fracture? Is there truly a difference in the outcome of this fracture utilizing the Locked plate system or is the percieved difference due to the surgical mini invasive approach.

Patients & Methods: One hunderd & forty patients were screened, only 53 were randomized and fixed in six academic centers over 5 years. All C3 fractures were excluded as they were felt not to be treatable by the DCS device, but they were treated appropiately. 35 females and 18 males were included in the study and randomized appropiatley.

Results: Fifty-three patients were randomized, 28 had the LISS implant and 25 had the DCS utilized. There were 3 nonunions in the LISS group plus two patients with early loss of reduction that required reoperation in the early post operative period. One patient developed arthrofibrosis requiring arthroscopic release and subsequently the implant failed necessitating refixation. In the DCS group, only one nonunion reported & required second surgery. This translated to a reoperation rate of 21% in the LISS group compared to 4% with DCS.

Conclusion: This prospective randomized multicentre trial showed a difference when comparing the LISS to the DCS in the supracondylar distal femur fractures.

Early fracture stabilization has been shown to reduce morbidity and mortality in the patient who is multiply injured. Controversy exists in terms of managing multiple trauma patients who sustain thoracic injuries along with femoral shaft fractures. The purpose of the present study was to determine whether the presence and treatment of femoral shaft fractures increases morbidity in patients with pulmonary contusions and to determine the effect of patient and surgical factors on outcome.

Patients that suffered chest injuries between January 1987 and April 2006 were identified from the prospectively collected trauma databases at two hospitals. Patient records were reviewed to verify all data. The diagnosis of pulmonary contusion was confirmed with radiologic or post-mortem investigations. All relevant patient and surgical data was collected. Exclusion criteria included severely injured patients (head/abdomen AIS> 3), age sixty years, death twenty-four hours after injuries occurred.

A total of 1190 patients with confirmed pulmonary contusions met inclusion criteria; there were 113 femoral shaft fractures (five bilateral). Patients in both the isolated pulmonary contusion and pulmonary contusion with femoral fracture had similar injury severity scores (ISS) and demographic information. Fractures were reduced with intramedullary nailing in 88% of cases. Mean age was thirty-five years. There were significantly more incidences of fat embolism syndrome and acute lung injury (ALI) in patients with femoral factures (twenty-four hours following the injury had significantly greater risk of developing ARDS (p< 0.05).

The presence of femoral shaft fractures in patients with pulmonary contusions increases the duration of admittance to hospital and can lead to higher rates of fat embolism syndrome and ALI, however it does not appear to impact overall mortality or contribute to the development of other common respiratory complications. Early reduction of shaft fractures is encouraged to further decrease complications.

5207 patients treated for a calcaneous fracture in Ontario between 1993–1999 were identified from population datasets and were reviewed to evaluate regional practice variation and complication rates for operatively and non-operatively managed calcaneous fractures. There was considerable geographic variation in treatment. Individuals in some parts of Ontario were almost eight times more likely to receive operative treatment than others. The majority of calcaneous fractures in Ontario are treated non-operatively, however the large observed practice variation suggests that there is disagreement among treating clinicians. Primary subtalar fusion has a high risk of post-operative infection and should therefore be considered very cautiously.

The purpose of this study was to evaluate regional practice variation and complication rates for operatively and non-operatively managed calcaneous fractures.

The majority of calcaneous fractures in Ontario are treated non-operatively, however the large observed practice variation suggests that there is disagreement among treating clinicians. Primary subtalar fusion has a high risk of post-operative infection and should therefore be considered very cautiously.

Given the observed regional variation in management of calcaneous fractures more work needs to be done to address this issue.

5207 fractures of the calcaneous in Ontario between 1993–1999were identified from population datasets. Regional variations in treatment and complication rates were computed. Multiple linear regression was used to identify factors associated with complications.

There was considerable geographic variation in treatment. Individuals in some parts of Ontario were almost eight times more likely to receive operative treatment than others. General surgeons or general practitioners definitively treated 30% of patients (almost all closed). Overall rate of complications was low, however there was a 13.4 percent infection rate following immediate subtalar fusion. Infection was 5.3% following ORIF and 0.6% following closed treatment. Infection risk was increased in multiple trauma patients and those with open fractures. Subsequent subtalar fusion rates (within the study period) were higher in multiple trauma patients, but were not associated with treatment (open or closed). Amputation was 22.5 times more likely following open calcaneous fractures but the overall amputation rate was only 0.17%. No relationship between surgeon experience and the rate of complications following operative treatment was identified.

Fracture of the femoral head usually results from high-energy trauma, particularly motor vehicle accidents. These fractures are often associated with poor functional outcomes. SF-36 and MFA scores were obtained for twenty-five femoral head fractures. The mean SF-36 scores was 57.2 (22.6 to 82) and the mean MFA score was 37.6 (10–72). As expected the scores were negatively correlated (−0.587, p=0.005). The presence of an ipsilateral posterior acetabluar wall fracture negatively affected functional outcome. Fragment excision was associated with a higher functional outcome when compared to internal fixation. Posterior surgical approach resulted in higher scores than patients who underwent an anterior procedure.

Fracture of the femoral head is a rare but severe injury. The purpose of this study is to determine the functional outcome of and prognostic factors associated with femoral head fractures.

Acetabular wall fracture, surgical approach, and method of surgical treatment are prognostic factors of functional outcome as measured by the SF-36 and the MFA.

There is currently no consensus on the management of femoral head fractures and treatment practices have evolved on the basis of a limited series of studies. Functional outcome following femoral head fracture has been evaluated using Epstein’s criteria in several studies, however, only one study has been conducted using a validated outcome measure.

Twenty-five femoral head fractures in twenty-four patients were identified from the trauma and orthopaedic databases of two major trauma centres. The patient with bilateral femoral head fractures was not included in the analysis. After obtaining informed consent, the patients’ medical records were reviewed. Functional outcome was assessed using two validated, patient-based outcome measures, the Short Form (SF)-36 and the Musculoskeletal Functional Assessment instrument (MFA). The average age of the patients was 36.8 (std. dev. 11.1) and the mean length of follow-up was 41.4 months (minimum twelve months). Three factors were identified using non-parametric analysis that significantly affected the functional outcome scores:

The presence of an ipsilateral posterior acetabluar wall fracture negatively affected functional outcome (p=0.08).

Intramedullary nailed high proximal tibial fractures rely on the proximal screw-bone interface to provide stability, which can be insufficient in low-density bones. This study investigated the biomechanics of proximal screw cement augmentation in intramedullary nailing of high proximal tibial fractures. Mechanical stability in flexion/extension, varus/valgus and torsion was tested on six pairs of cadaveric proximal tibiae, with/without cement augmentation. Cement augmentation significantly increased construct stability in torsion and demonstrated a trend towards improved varus/valgus stabilization. Surprisingly, cement augmentation significantly decreased stability in flexion/extension, suggesting the potential benefits of cement augmentation may be limited in intramedullary nailed high proximal tibial fractures.

This study assessed the biomechanical effects of augmenting proximal screws with cement in intramedullary nailing of high proximal third tibial fractures.

While increased biomechanical stability was seen in torsion and varus/valgus, the reduction in stability in flexion/extension suggests that there may be limited benefit in cement augmentation in the nailing of high proximal tibia fractures.

High proximal tibial fractures fixed with intramedullary nailing rely primarily on proximal screw fixation to provide stability. Cement augmentation of the proximal screws may provide needed increased construct stability in low-density tibiae.

Cement augmentation provided a significant increase in construct stability in torsion (37.5% ± 8.0%, p< 0.05), with a trend toward increased stability in varus/valgus (25.5% ± 36.2%, p=0.08). Conversely, stability in flex-ion/extension was significantly decreased with the use of cement (25.9% ± 13.0%, p< 0.05).

Reamed intramedullary nails (Zimmer, MDN) were implanted into six pairs of elderly cadaveric fresh-frozen proximal tibiae and secured using four proximal screws (two transverse, two oblique, 4.5mm diameter). Bone cement was injected into the screw holes just prior to screw insertion to augment the bone-screw interface in one tibia from each pair. Specimen stability was tested in flexion/extension and varus/valgus loading to 12Nm and in torsion to 7Nm. Displacement data was generated and analyzed using a repeated measures design.

We hypothesized that intramedullary nail-bone construct stability would be increased with cement augmentation, particularly in low-density specimens. While construct stability was improved in torsion and varus/valgus, surprisingly stability consistently decreased in flexion/extension.

The purpose of this study was to evaluate functional outcome in patients with combined pelvic and acetabular fractures and to identify factors associated with outcome. One hundred and fifteen patients were identified. 63% were male; mean age was thirty-seven years; mean ISS was thirty. Three patients died from their injuries. At a mean follow-up of 3.5 years, patients exhibited profound functional deficits compared to the normal population. Those with an acetabular fracture involving the posterior wall or an associated lower extremity injury have a particularly poor prognosis. Combined pelvic and acetabular injuries are associated with high mortality and functional morbidity irrespective of treatment.

To evaluate functional outcome in patients with combined pelvic and acetabular fractures and to identify factors associated with outcome.

Combined pelvic and acetabular injuries are associated with high mortality and functional morbidity irrespective of treatment.

These results will allow us to further investigate which injury is dictating prognosis in the combined injury – the pelvic or the acetabular fracture.

One-hundred and fifteen patients with combined pelvic and acetabular injuries were identified at a level One trauma centre. 63% were male; mean age was thirty-seven years (13–88); mean ISS was thirty (16–75). Three patients died from their injuries. 16% involved bilateral pelvic fractures; 7% bilateral acetabular fractures; and for 2%, both were bilateral. 64% were Tile B and 34% were Tile C. Most acetabular fractures involved the anterior column or both column. Only 18% were treated with ORIF for both injuries. 25% had ORIF of their acetabulum and 14% had ORIF on their pelvis. Sixty-five patients completed validated functional outcome questionnaires at a mean follow-up of 3.5 (one to eleven) years. Patient function was significantly compromised with a mean MFA score of 33.8 (SD 21.8). Function was worse for all 8 SF-36 domains and the two component scores compared to the health status of the Canadian normal population (p< 0.001). Those individuals with an acetabular fracture involving the posterior wall or an associated lower extremity injury have a particularly poor prognosis. There was no relationship found between treatment or the pre-defined stability groups and functional outcome.

Funding: Grant funded from AO/ASIF

The purpose of this study was to evaluate functional outcome in patients with combined pelvic and acetabular fractures and to identify factors associated with outcome. One hundred and fifteen patients were identified. 63% were male; mean age was thirty-seven years; mean ISS was thirty. Four died from their injuries. Five patients had open injuries. Only 18% were treated with ORIF for both injuries. At a mean follow-up of 3.5 years, patients with combined pelvic and acetabular fractures exhibit profound functional deficits compared to the normal population. Combined pelvic and acetabular injuries are associated with high mortality and functional morbidity irrespective of treatment.

The purpose of this study was to evaluate functional outcome in patients with combined pelvic and acetabular fractures and to identify factors associated with outcome.

Combined pelvic and acetabular injuries are associated with high mortality and functional morbidity irrespective of treatment. Those individuals with an acetabular fracture involving the posterior wall and an associated lower extremity injury have a particularly poor prognosis.

Individuals who have sustained high energy combined injuries exhibit profound functional impairments compared to the general normal population even in the long term.

One hundred and fifteen patients with combined pelvic and acetabular injuries were identified using a trauma database at a level one trauma centre. 63% were male; mean age was thirty-seven years (13–8); mean ISS was thirty (9–5). 16% involved bilateral pelvic fractures; 7% bilateral acetabular fractures; and for 2%, both were bilateral. 64% were Tile B and 34% were Tile C. Most acetabular fractures were anterior column (31%) or both column fractures (26%). Only 18% were treated with ORIF for both injuries. 25% had ORIF of their acetabulum and 14% had ORIF on their pelvis. Sixty-five patients completed functional outcome questionnaires at a mean follow-up of 3.5 years (1–21). Function was significantly compromised with a mean MFA score of 33.8±21.8. Function was worse for all eight SF-36 domains and the two component scores compared to the Canadian normal population (p< 0.001). There was no relationship found between severity of pelvic or acetabular injury and patient function nor between treatment and functional outcome.

Funding: Grant funded from AO/ASIF

Introduction and Aims: The combination of ipsilateral intertrochanteric and femoral shaft fractures is an uncommon pattern associated with high-energy trauma. This retrospective study used self-report measures to evaluate functional outcome of patients sustaining this fracture pattern and compared two common treatment methods.

Method: Three patient-based outcome measures, the Short Form-36 (SF-36), Short Musculoskeletal Functional Assessment (SMFA), and Lower Extremity Functional Scale (LEFS) were used to evaluate the functional outcome of twenty-one patients (13 male, mean 46.7 +/− 16.5 years) treated with a reconstruction nail (n=11) or with a sliding hip screw and retrograde nail (n=10).

Results: Mechanisms of injury included motor vehicle accidents (66.7%) and falls from height (14.3%). SF-36 physical and mental component scores were less than Canadian norms, with mean values of 35.9 (p=0.0001) and 43.7 (p=0.02), respectively. There was a trend towards better functional outcome in the group treated with the sliding hip screw with retrograde nail despite this group sustaining more severe injuries as measured by ISS (p=0.004), number of days in hospital (p=0.027), and number of days in ICU (p=0.009).

Conclusion: Functional outcome following treatment of ipsilateral intertrochanteric and femoral shaft fractures was reduced compared to Canadian norms. Despite having sustained more severe injuries, the sliding hip screw with retrograde nail group showed a trend towards better outcome as compared to the group treated with the reconstruction nail.