Single versus separate implant fixation for concomitant ipsilateral femoral neck and shaft fractures: A systematic review

Comparison of reconstruction nails versus dual implants in the treatment of ipsilateral femoral neck and shaft fractures in adults: a meta-analysis and systematic review

OBJECTIVE

There is no consensus on the optimal treatment for ipsilateral femoral neck and shaft fractures. This meta-analysis aims to assess the effectiveness of reconstruction nails and dual implants in treating ipsilateral femoral neck and shaft fractures to provide a basis for decision-making when selecting the optimal approach.

METHODS

Relevant articles were retrieved from Pubmed, Embase, and Cochrane databases using the keywords "neck of femur", "shaft" and "fracture fixation" from inception until November 17, 2022. The screening process of the studies was conducted independently by two assessors, who assessed each study's eligibility and two assessors assessed the quality. Then compared differences in outcome measures using RevMan 5.3 software.

RESULTS

A total of ten retrospective cohort studies were included. There were no significant differences in union time, union rate, union-related complications (malunion, nonunion, delayed union) of femoral neck and shaft fractures, osteonecrosis of the femoral head, and functional outcomes (Friedman-Wyman scoring system) (P > 0.05).

CONCLUSION

Our pooled estimates indicated that reconstruction nails and dual implants for ipsilateral femoral neck and shaft fractures could yield satisfactory surgical results, and that there is no difference between the two treatment methods.

TRIAL REGISTRATION

This meta-analysis was registered on the PROSPERO website (registration number: CRD42022379606).

Surgical fixation of ipsilateral femoral neck and shaft fractures: a matter of debate?

Segmental femoral fractures represent a rare but complex clinical challenge. They mostly result from high-energy mechanisms, dictate a careful initial assessment and are managed with various techniques. These often include an initial phase of damage control orthopaedics while the initial manoeuvres of patient and soft tissue resuscitation are employed. Definitive fixation consists of either single-implant (reconstruction femoral nails) or dual-implant constructs. There is no consensus in favour of one of these two strategies. At present, there is no high-quality comparative evidence between the various methods of treatment. The development of advanced design nailing and plating systems has offered fixation constructs with improved characteristics. A comprehensive review of the existing evidence with a step-by-step description of these different definitive fixation strategies based on three case examples was conducted. Furthermore, the rationale for using single vs dual-implant strategy in its case is presented with supportive references. The prevention of complications relies mainly on the strict adherence to basic principles of fracture fixation with an emphasis on careful preoperative planning, the quality of the reduction, and the application of soft tissue-friendly surgical methods.

Clinical outcomes and affecting factors of ipsilateral femoral neck and shaft fractures - Multination, multicenter analysis

BACKGROUND

This study aimed to evaluate the clinical outcomes of ipsilateral femoral neck and shaft fractures and identify the risk factors associated with missed diagnosis of femoral neck fractures and clinical outcomes of this fracture.

METHODS

The ipsilateral femoral neck and shaft fractures from seven centers were retrospectively reviewed. Data on injury mechanism, fracture pattern, and fracture classification; surgical factors including fixation method; and timing of detection of femoral neck fracture were analyzed. The clinical outcomes, complications, and the incidence of avascular necrosis of the femoral head (AVNFH) were reviewed. Risk factors for missed femoral neck fracture and complications were analyzed.

RESULTS

In total, 74 patients with an average age of 43.6 years were included. Of the femoral shaft fractures, 56.8% were type A, 21.6% were type B, and 21.6% were type C. Sixteen patients had an open fracture of the femoral shaft. Femoral neck fracture was initially missed in 27% patients and the timing of delayed diagnosis was at an average of 11.1 days after injury. For detecting femoral neck fractures, minimal displacement of the femoral neck fracture was a risk factor, whereas computed tomography (CT) was a protective factor. The incidence of AVNFH was 6.8% at an average of 36.8 months after injury. The AVNFH group had more displaced femoral neck fractures at the time of surgery, but there was no difference in the timing of diagnosis compared to non-AVNFH group. The femoral shaft showed considerable healing problems, with an average union time of 29.7 weeks and a 20.2% nonunion rate.

CONCLUSION

Ipsilateral femoral neck and shaft fractures had a high rate of missed diagnosis, especially in minimally displaced fractures; however, CT was a protective factor. AVNFH occurred in 6.8% and was related to femoral neck fracture displacement, but not delayed diagnosis. The femur nonunion rate was high, which warrants attention.

Outcome Analysis of Dual Implant Osteosynthesis for Ipsilateral Proximal and Shaft Femur Fractures: Do We Need Cephalomedullary Nails?

Introduction

Most surgeons prefer a single implant for segmental proximal and diaphyseal femur fractures, although results are controversial and still no consensus for proper management is present. This prospective study analyses the functional and radiological outcome of managing 17 patients with ipsilateral shaft and proximal femur fractures by dual implant osteosynthesis at our center.

Methods

Over a two-year period, we managed 17 patients with a mean age of 35 years, with cancellous cannulated screws or dynamic hip screws for intracapsular femur fractures and improvised proximal femoral nail for extracapsular proximal femur fractures. Distal femoral locking plates or distal femoral nails were used for shaft femur fractures depending upon fracture morphology. The patients had a maximum follow-up of 18 months.

Results

A total of 80% of patients had a good functional outcome (using the Friedman-Wyman scoring system) while 60% had an excellent Harris Hip Score. The mean time taken for the bone union for proximal femur fractures was 4.75 months and for shaft femur fractures, it was 6 months.

Conclusion

We had a satisfactory functional and clinical outcome of managing these fractures with two implants, one focusing biomechanically on each fracture. This principle of dual implant osteosynthesis can reliably be used in such difficult fracture patterns and it negates the use of the single cephalomedullary nail for fixating both fractures.

Femoral Neck Nonunion Associated With Delayed Union of Ipsilateral Femoral Shaft Fracture

We report the case of a 36-year-old man, who presented to us five months after the initial trauma. He had been treated elsewhere with a cephalomedullary femoral nail. He described severe pain in his right thigh and groin that confined him to a wheelchair. He had shortening of the right lower limb and painful restriction of movements of the right hip. Radiographs demonstrated hypertrophic callus with a gap at the femoral shaft while the neck fracture was in varus malalignment with bone resorption; the neck fracture been fixed using two hip screws that were missing the nail. The patient was managed with removal of the previous hardware, reamed retrograde nailing and Pauwels’ intertrochanteric valgus osteotomy fixed using a 120^o double-angled condylar blade plate. Both the fracture sites were not opened. Postoperatively, the femoral shaft showed radiographic evidence of union at three months, while the femoral neck and the intertrochanteric osteotomy site had united at five months. As per the Friedman and Wyman criteria, our patient has a “good” outcome at the four-year follow-up.

Dual-construct fixation is recommended in ipsilateral femoral neck fractures with infra-isthmus shaft fracture: A STROBE compliant study

ABSTRACT

The aim of this study was to evaluate the risk factors related to osteosynthesis failure in patients with concomitant ipsilateral femoral neck and shaft fractures, including old age; smoking habit; comminuted fragments; infra-isthmus fracture; angular malreduction; unsatisfactory reduction (fracture gap >5 mm); and treatment with single construct.Patients over the age of 20 with concomitant ipsilateral femoral neck and shaft fractures diagnosed at a level one medical center between 2003 and 2019 were included. Treatment modalities included single construct with/without an antirotational screw for the neck and dual constructs. Radiographic outcomes were assessed from anteroposterior and lateral hip radiographs at follow-up. Fisher exact test was used to analyze categorical variables. The presence of avascular necrosis of the femoral head, delayed union, atrophic or hypertrophic nonunion of the femoral shaft fracture, and loss of reduction were identified as factors related to treatment failure.A total of 22 patients were included in this study. The average age was 58.5 years, and the majority was male (68.2%). The minimum radiographic follow-up duration was 12 months, and the median follow-up time was 12 (interquartile range 12-24) months.Femoral neck osteosynthesis failed in 3 patients, whereas femoral shaft osteosynthesis failed in 12 patients. Fisher exact test demonstrated the failure of femoral shaft osteosynthesis was significantly more frequent in the single-construct cohort in 16 infra-isthmus femoral fracture cases (P = .034).In ipsilateral femoral neck and infra-isthmus shaft fractures, it is better to treat the neck and shaft fractures with separate implants (dual constructs).In a dual-construct cohort, separate plate fixation of the femoral shaft achieved a better result in terms of bone union than retrograde nailing of the shaft (bone union rate: 4/8 vs 0/2).

Salvaging Chronic Nonunion of Femoral Neck and Infected Nonunion of Ipsilateral Femoral Shaft Fracture Using Intramedullary Antibiotic Cement Spacer and External Fixator Alone

Concomitant ipsilateral fractures of femoral neck and shaft are rare injuries and pose challenging management. Infected non-unions of such fractures can further complicate the management options and have not been discussed in the literature. We present a case of an eight-month-old atrophic non-union of ipsilateral femoral shaft and femoral neck with evidence of intramedullary infection that was managed using a cost-effective, low strain rail fixator assembly and an intramedullary antibiotic cement spacer. Both fracture non-unions were salvaged without the need for any additional procedure. The patient returned to his regular activities within a year follow-up period. There was no clinical evidence of infection during the last follow-up at 16 months, and inflammatory markers were within normal limits. The current case study suggests that while aggressive debridement and intramedullary antibiotic cement spacer can control the intramedullary infection, and simultaneous union of even atrophic nonunion of femoral shaft and femoral neck, both, can be obtained using a tensioned Schanz pin-based external fixator without the need for any secondary procedure. Such a fixator and cement spacer assembly can thus address the dual purpose of fracture stabilization during infection control as well as the union of the non-union sites.

Single lag screw and reverse distal femur locking compression plate for concurrent cervicotrochanteric and shaft fractures of the femur: biomechanical study validated with a clinical series

BACKGROUND

The optimal surgical management of concurrent cervicotrochanteric and shaft fractures of the femur has not been consensual. The authors investigated the reliability of combined single lag screw and reverse distal femur locking compression plate (LCP-DF) by finite element (FE) study and retrospectively described the present technique for these dual fractures.

METHOD

Intact femurs were derived from CT data, and the implant models were created by using CAD software. The fractured femur and implant models were virtually aligned based on the surgical techniques before converting to the FE model. In the FE model, applied boundary conditions included body weight, muscle forces, and constraint of the joints. Regarding clinical series, three patients with these dual fractures of the femur and 2 with cervicotrochanteric fractures with subtrochanteric extension were operated on by the proposed technique. The collected data include operative time, postoperative complications, union times, and clinical outcomes.

RESULTS

Equivalent von Mises stress exhibited on dynamic hip screws with an anti-rotational screw was higher than the other techniques, close to the yield stress of the material. Multiple screw fixation produced better stability for transcervical fractures whereas the proposed technique of combined single lag screw and reverse LCP-DF provided better stability for intertrochanteric fractures. No significant difference in cortical bone stress was found between multiple screw construct and the proposed technique. The proposed technique presented a lower risk of secondary fractures, as the strain energy density (SED) in cancellous bone was lower than multiple screw construct. Regarding clinical series, all fractures were united with a mean union time of-16.1 weeks (range 12-20). There were no any postoperative complications. Regarding the Harris score, 1 was determined to be excellent value, and 4 to be good.

CONCLUSION

By the FE results, a combination of a single lag screw and reverse LCP-DF is an effective technique for fixation of cervicotrochanteric fractures. Empowered by the clinical results, this proposed technique could be an alternative for concurrent cervicotrochanteric and shaft fractures of the femur especially when either single-system or dual-system devices seem not to be suitable.

The rendezvous technique for the treatment of ipsilateral femoral neck and shaft fractures: A case series

Concomitant ipsilateral femoral neck and shaft fractures are uncommon high-energy injuries characteristically occurring in young adults. Between 75 and 100% of these injuries occur in association with polytrauma to other organ systems. Associated femoral neck fractures are typically undisplaced, occurring in 2–9% of all femoral shaft fractures. These injuries present both technical and infrastructural challenges particularly in a low resource environment. Several methods of treatment have been used to successfully treat these fractures but there exists no consensus about the optimal management strategy. The “rendezvous” technique using dual implants in an overlapping fashion has been proposed as one method to treat these fractures. We present three cases of ipsilateral hip and femoral shaft fractures which were satisfactorily treated using this technique. The “rendezvous” technique is a simple method, with a good clinical outcome and a low complication rate that can be used to treat ipsilateral femoral neck and shaft fractures.