Flexible intramedullary nailing in pediatric lower limb fractures

Titanium Elastic Nails Are a Safe and Effective Treatment for Length Unstable Pediatric Femur Fractures

BACKGROUND

Controversy exists regarding the treatment of length unstable pediatric femoral shaft fractures. The purpose of this study was to investigate the outcomes of skeletally immature children with length unstable femur fractures treated with titanium elastic nails (TENs).

METHODS

A retrospective review was conducted on all patients with femoral shaft fractures at a tertiary care pediatric hospital from April 2006 to January 2018. Patients with femoral shaft fractures treated with TEN and minimum 6 months follow-up were included. Exclusion criteria were age 11 years or above, weight >50 kg, pathologic fracture, and neuromuscular disorders. Femur fractures were categorized into 2 groups: length unstable (spiral, comminuted, or long oblique fractures) versus length stable (transverse and short oblique). Complications and reoperations were compared between the groups.

RESULTS

A total of 57 patients with 58 femoral shaft fractures were included. The mean age was 5±2 (1 to 11) years and mean follow-up was 20.4±18.1 (6.0 to 81.2) months. The mean weight was 22.9±7.7 (11.0 to 40.5) kg. There was no difference in age (P=0.32), weight (P=0.28) or follow-up length (P=0.57) between patients with length unstable fractures and those with length stable fractures. A total of 32/58 (55%) fractures were length unstable and 26/58 (45%) were length stable. Mean time to union was 4.6 months, and there was no significant difference in mean time to union between the 2 groups (P=0.71). Thirty-one complications occurred in 27 patients. There was no difference between groups in the incidence of major complications requiring revision surgery (P=0.68) and minor complications that did not require revision surgery (P>0.99).

CONCLUSIONS

In children with femoral shaft fractures treated with TEN, there was no difference in the incidence of complications or reoperations between those with length unstable fractures and those with length stable fractures. TEN are a safe and effective choice for operative fixation of length unstable femoral shaft fractures in children.

LEVEL OF EVIDENCE

Level III-retrospective comparative study.

Relevant advances in bone lengthening research: a bibliometric analysis of the 100 most-cited articles published from 2001 to 2017

This study aimed to assess the scientific production of bone lengthening research by identifying the most-cited papers. All articles including the term 'bone lengthening' published between 2001 and 2017 were retrieved through the Web of Science database. The 100 most-cited articles on bone lengthening included a total of 4244 citations, with 414 (9.7%) citations in 2017. There was an average of 249.6 citations per year. The articles predominantly addressed biomechanics and bone formation (38). Different surgical techniques, including intramedullary nail (14), Ilizarov (nine), intramedullary skeletal kinetic distractor (ISKD) (six), Taylor spatial frame (6), the PRECICE device (three), and lengthening and submuscular locking plate (three), were the second most-studied topic. Most studies were therapeutic (58), whereas 30 studies were experimental investigations using animal models. Among the clinical studies, case series were predominant (level of evidence IV) (57). This study presents the first bibliometric analysis of the most relevant articles on bone lengthening. The list is relatively comprehensive in terms of identifying the top issues in this field. However, the most influential clinical studies have a poor level of evidence, although a slight tendency toward a better level of evidence has been observed in more recent years.

Risk factors for refracture of the forearm in children treated with elastic stable intramedullary nailing

PURPOSE

This study aims to investigate risk factors for refracture of the forearm in children treated with elastic stable intramedullary nailing (ESIN).

METHODS

Clinical data of 267 patients who had been treated for forearm fractures by ESIN in our hospital from January 2010 to December 2014 were retrospectively reviewed. Risk factors for forearm refractures were determined using logistic regression analysis.

RESULTS

Forearm refractures occurred in 11 children. Univariate analysis revealed that age, body weight, number of fractures, open fracture, nail diameter, and immobilization time were not associated with refractures. However, gender (male, P = 0.042) and fracture location (lower third, P = 0.007) were significantly associated with refractures. Multivariate analysis revealed that fracture location was an independent risk factor for forearm refractures (P = 0.031).

CONCLUSION

Forearm refracture is uncommon in children treated with ESIN. Fracture location is an independent risk factor for forearm refractures in these patients.

Comparison of the outcomes of pediatric tibial shaft fractures treated by different types of orthopedists: A prospective cohort study

BACKGROUND

The objective of this study was to compare the outcomes of pediatric tibial shaft fractures treated with titanium elastic nail (TEN) by pediatric orthopedists and non-pediatric orthopedists.

MATERIALS AND METHODS

We conducted a prospective cohort study of 90 children of tibial shaft fractures, who were randomized to operative stabilization either by pediatric orthopedists (Group A, 45 cases) or by non-pediatric orthopedists (Group B, 45 cases) from April 2010 to May 2015. Demographic data and clinical characteristics (age, sex, weight, fracture side and type, cause of injury, number of fibula fracture and time from injury to operation) were comparable between the two groups before surgery. Clinical data, complications and functional outcomes between the two groups were recorded.

RESULTS

A total of 10 patients were lost to follow-up for various reasons and each group remained 40 cases. The mean follow-up period was 14.9 ± 1.9 months for Group A and 15.3 ± 2.2 months for Group B (P = 0.451). There was no significant difference in length of hospitalization, full weight-bearing time, fracture union time and TEN outcome scores between the two groups (P = 0.917, P = 0.352, P = 0.404, P = 506, respectively). However, Group A exhibited significantly shorter operation duration and less fluoroscopy times than Group B (P < 0.001 and P < 0.001, respectively). Also, there was a trend for patients of Group A to have lower rate of open reduction than Group B (P = 0.019). When comparing the total complications, no significant difference existed between the groups (P = 0.764).

CONCLUSIONS

Our results indicated that pediatric tibial shaft fractures treated surgically by pediatric orthopedists offered potential advantages including a shorter operating time, less times of fluoroscopy and a lower rate of open reduction. However, both pediatric and non-pediatric orthopedists could achieve satisfactory clinical results in treatment of these injuries.

Titanium Elastic Nailing for Pediatric Tibia Fractures: Do Older, Heavier Kids Do Worse?

BACKGROUND

Elastic nailing is a common method of fixation for tibial shaft fractures in skeletally immature individuals. Poor outcomes of titanium elastic nails for femoral shaft fractures have been associated with increasing patient age and weight, especially patients weighing >50 kg. Our objective is to determine if there is an upper weight or age limit to the safe and effective use of titanium elastic nails for tibial shaft fractures in the pediatric population.

METHODS

This is a retrospective cohort study of patients who underwent stabilization of a tibial shaft fracture with titanium elastic nails at a large tertiary-care pediatric trauma center. Data collected included patient demographics, injury characteristics, and radiographic data. Weight groups were stratified as ≥ or <50 kg, and age groups as 14 years or older or less than 14 years old. Malunion was defined as 10 degrees of angulation in either the sagittal or coronal plane. Union was defined as bridging of ≥3 cortices on orthogonal radiographs. A significant difference in time to union was considered to be 3 weeks.

RESULTS

Ninety-five patients were included with a mean age of 12.1 years (range, 6 to 16 y) and a mean weight of 50.2 kg (range, 21 to 122 kg). Malunion rate was similar between weight cohorts: 13.3% (6/45) in the ≥50-kg group and 10% (5/50) in the <50-kg group (P=0.61). Malunion rate was similarly comparable between age groups: 17.6% (6/34) in the 14 years and older group and 8.2% (5/61) in the less than 14-year-old group (P=0.17). There was no statistically significant difference in time to union between weight or age cohorts. In sum, we did not find a significant difference in the rate of malunion or time to healing between younger and older patients or between lighter and heavier patients.

CONCLUSION

The use of titanium elastic nails for tibial shaft fractures, unlike for other long bone fractures, seems not to be precluded in older and heavier patients.

LEVEL OF EVIDENCE

Level III.

Flexible Intramedullary Nailing of Unstable and/or Open Tibia Shaft Fractures in the Pediatric Population

Tibial shaft fractures are common injuries in the pediatric population, and can be treated conservatively the vast majority of the time. Yet, it is important to recognize that open and/or unstable tibial shaft fractures represent a different entity. Rigid intramedullary devices are generally contraindicated because of the skeletal immaturity of these patients, and external fixation is associated with a high complication rate. As a result, flexible nailing is being utilized with increasing frequency. It is essential for the clinician to understand the pearls and pitfalls associated with the utilization of these flexible nails; particularly in regards to their immediate use in the context of open fractures and the risk of compartment syndrome postoperatively after fixation.

Comparative Study Using Intramedullary K-wire Fixation Over Titanium Elastic Nail in Paediatric Shaft Femur Fractures

BACKGROUND

Fracture shaft femur is common paediatric trauma leading to significant morbidity. Conservative treatments available are associated with prolonged periods of immobilization. Use of flexible intramedullary implant allows early rehabilitation in diaphyseal fractures of femur in children.

AIM

The aim of the present study is to compare fixation of diaphyseal femur fracture by titanium elastic nail and intramedullary K-wires in children.

SETTING AND DESIGN

Prospective randomized study in a tertiary care hospital.

MATERIAL AND METHODS

Fifty-two children between 6 years and 14 years of age with femoral shaft fracture were assigned either in Group I or Group II based on computer generated random numbers. In Group I closed percutaneous intramedullary K- wire fixation and in Group II closed percutaneous intramedullary titanium elastic nail was used to fix the fractures. Partial weight bearing was allowed after 6 weeks of surgery and full weight bearing at clinico-radiological union.

RESULTS

Average time of radiological union was 6 to 10 weeks in both groups. In both the groups two cases had entry site irritation which resolved with early implant removal. One case in both the groups had unacceptable mal-alignment. Both the groups had few cases of limb-length discrepancy, which was in acceptable limit, except two cases of TENS. There was no statistically significant difference between the results of both the groups. But, using K-wires significantly reduced the cost of treatment.

CONCLUSION

Most of such fractures in our society are neglected because of high cost of treatment. Providing a cheaper alternative in form of K-wires may be beneficial for the patients from low socio-economic status.

Elastic Stable Intramedullary Nailing for Fractures in Children - Specific Applications

Elastic stable intramedullary nailing (ESIN) is a new minimally invasive technique for the treatment of pediatric fractures. It approximates the physiological healing process of bone, without opening the fracture site. Also, the operative stress is minimal because of the minimally invasive nature of the procedure, and the volume of implants is small, offering a very good stability without plaster cast immobilization.

Elastic Stable Intramedullary Nailing for Fractures in Children - Principles, Indications, Surgical Technique

Elastic stable intramedullary nailing (ESIN) is a minimally invasive technique. According to this technique, two elastic nails are introduced through the metaphysis into the medullary canal, advanced through the fracture site and impacted into the opposite metaphysis. These nails are preformed in a C-shaped manner, which allows for their precise orientation and the creation of an elastic system that resists deformation.

The use of the taylor spatial frame for the treatment of unstable tibial fractures in children

OBJECTIVES

The aim of this study was to assess the use of the Taylor Spatial Frame (TSF) in the treatment of unstable tibial fractures in skeletally immature patients.

DESIGN

Retrospective review.

PATIENTS/PARTICIPANTS

Twelve consecutive skeletally immature patients with unstable tibial fracture treated at our centre with a TSF.

INTERVENTION

A TSF was applied by a single surgeon for the stabilization of unstable tibial fractures.

MAIN OUTCOME MEASURES

Time to union, nonunion, malunion, reoperations, leg length discrepancy, and complications such as infections and compartment syndrome in both closed and open tibial fractures.

RESULTS

Over a 4-year period, 8 patients with closed unstable tibial fractures and 4 patients with grade IIIB open fractures were treated with a TSF by a single surgeon. Union was achieved in all cases with no residual angulation and no leg length discrepancy. The mean time of the TSF treatment for the 8 closed fractures was 12.6 (range: 8-22) and for the 4 grade IIIB open fractures was 24.25 weeks (range: 13-36). There was 1 patient who developed compartment syndrome after application of the TSF and 2 who developed superficial pin site infections treated with oral antibiotics.

CONCLUSIONS

This study supports the use of TSF in experienced users for the treatment of unstable closed and open fractures in skeletally immature patients.

Intramedullary nails for pediatric diaphyseal femur fractures in older, heavier children: early results

PURPOSE

A common treatment for pediatric femur fractures is intramedullary nail (IMN) insertion. Elastic stable intramedullary nails (ESINs) are often used for these procedures in heavier patients, but the potential for complications and malunion is greater. We describe here a rigid IMN specifically designed for adolescents, the adolescent lateral entry femoral nail (ALFN). The purpose of this study was to compare the recovery and complications for patients treated with ESINs to those treated with the ALFN.

METHODS

Our study design was a retrospective cohort study. We performed a review of medical records of 22 children ages 10-17 requiring surgical fixation of a femur fracture for a 2½-year period. Patients selected for the study had traumatic diaphyseal femur fractures and were treated with ESINs without end-caps or ALFNs. Our analyses evaluated injury, surgical, and outcome information for all patients.

RESULTS

Twenty-two patients were eligible for inclusion and were divided into two groups according to their treatment: the ESIN group with 7 patients and the ALFN group with 15 patients. We then performed a comparison of complications and recovery for these patients. The mean time to full weight-bearing was significantly less for the ALFN group (4.1 weeks; SD, 2.2), than the ESIN group (9.4 weeks; SD 3.9). There was no statistical difference in the incidence of major or minor complications.

CONCLUSIONS

Older, heavier pediatric patients treated for femur fracture with ALFNs had a shorter recovery time than similar patients treated with ESINs. However, the outcomes for both groups were satisfactory.

Elastic stable intramedullary nailing for pediatric long bone fractures: experience with 175 fractures

PURPOSE

To demonstrate the effectiveness of intramedullary fixation of displaced long bones shaft fractures in skeletally immature children using the elastic stable intramedullary nails.

PATIENTS AND METHODS

The case records of 173 children who underwent fixation with titanium intramedulary nails because of long bones fractures were reviewed. The average age of the patients was 11.7 years, and mean follow-up was 41.3 months. There were 55 humeral, 42 forearm, 42 femoral and 36 tibial fractures. Subjective satisfaction was assessed.

RESULTS

All patients achieved complete healing at a mean of 7.5 weeks. Complications were recorded in 11 (6.3%) patients and included: one neuropraxia, six entry site skin irritations, two protrusions of the wires through the skin and two skin infections at the entry site. In a subjective measure of outcome at follow-up, 89% of patients were very satisfied and 11% satisfied; no patients reported their outcome as not satisfied. The implants were removed at a median time of six months from the index operation.

CONCLUSION

Elastic Stable Intra-medullary Nailing is the method of choice for the pediatrics patients, because it is minimaly invasive and shows very good functional and cosmetic results. It allows an early functional and cast-free follow-up with a quick pain reduction.

Different types of femoral shaft fracture; different types of treatment: their effects on postoperative lower llimb discrepancy

Femoral shaft fracture in child is a disabling injury. Different methods of treatment can be used for femoral shaft fracture and depends on patient condition.THE AIM OF THE STUDY was to evaluate lower limb discrepancy following different method of treatment and possible related factors especially type of fractures. MATERIAL AND METHODS. This retrospective cross sectional study was carried out in Imam Khomeini and Razi Hospital from 2003-2007 on children admitted to hospital with femur fracture. All children aged <12 years of age with diagnosis of femoral shaft fracture were included in this study. Different methods of treatment were flexible intramedullary nailing, rigid intramedullary nailing with Steinmann pin and spica casting, spica casting and closed reduction, and ORIF with plate and screw. Distance from hip to knee for each patient was determined in scanograms. Sex, age, side of involvement, type of fracture were recorded for each case. Analysis was done with SPSS ver. 16.0. ANOVAs, Chi-Square, and t-Test were used with CI=95%. RESULTS. In this study, 253 cases (M=182, F=71) were included. One hundred forty-six (57.7%) cases had right involvement and 107 (42.3%) of cases had left side involvement. From all cases, 135(53.4%) cases had no changes in lower limb length. Eleven (4.3%) cases had lower limb shortening and 107(42.3%) cases had lower limb lengthening. Type A1 and type A2 showed greatest lower limb discrepency among cases who underwent ORIF with screw & plate fixation, and spica casting with closed reduction respectively (p<0.05). CONCLUSIONS. There is significant difference among surgical and non surgical treatment for LLD. Spica casting and closed reduction has the least changes compared to other methods. Sex, side of involvement, type of fracture, and location had no effect in post operative length changes. Type of fracture, only, has a role in screw and plate fixation group and this is may be due to the differences between A1 and A3 fractures. Most of the changes were seen in the range of 60 through 120 months of age. Most of the changes were in the range +10 to +20 mm.

The incidence of compartment syndrome after flexible nailing of pediatric tibial shaft fractures

PURPOSE

Pediatric tibial shaft fractures are common injuries encountered by the orthopaedic surgeon. Flexible intramedullary nailing has become popular for pediatric patients with tibial shaft fractures that require operative fixation. The purpose of our study was to evaluate the incidence of, and the risk factors for, compartment syndrome (CS) after flexible intramedullary nailing of these injuries.

METHODS

A retrospective review of tibial shaft fractures treated consecutively with flexible intramedullary nailing at our institution from 2003 to 2010 was performed. The incidence of CS after flexible nailing was recorded. In addition, age, weight, mechanism of injury, polytrauma, presence of an open fracture, presenting neurovascular exam, fracture pattern, delay in treatment (>24 h from injury), prior closed reduction attempts, method of reduction (open vs. closed) in the operating room, total fluoroscopy time, and operative time were recorded. Comparisons were made between children who developed CS and those who did not.

RESULTS

Thirty-one children met inclusion criteria with a mean age of 11.2 years (range, 6.3-15.3 years); all were boys. Nearly, 20% of children developed CS after flexible nailing of their fractures. Those who developed CS after flexible nailing were heavier than the unaffected group (52.6 ± 14.5 kg vs. 39.4 ± 15.2 kg, P = 0.05); with a greater percentage of children 50 kg or greater (83.3% vs. 26.1%, P = 0.02) within the CS group. Children who developed CS were also more likely to present with neurologic deficits in the absence of compartmental swelling prior to surgery (66.7% vs. 9.1%, P = 0.009), and more likely to have comminuted/complex fracture patterns (83.3% vs. 29.1%, P = 0.02). There was no difference between patients who did and did not develop CS in regards to age (P = 0.42), high-energy injury mechanism (P = 0.30), polytrauma (P = 1.0), delay in treatment (P = 0.28), prior closed reduction attempts (P = 1.0), method of reduction (open vs. closed; P = 1.0) in the operating room, total fluoroscopy time (P = 0.96), and total operative time (P = 0.45). In addition, there was no difference (P = 0.65) in the rates of CS between children with open and closed fractures.

CONCLUSIONS

There is a high risk of CS after flexible intramedullary nailing of pediatric tibial shaft fractures regardless of whether an injury is open or closed. Variables that would seemingly be associated with the development of CS (high-energy injury mechanisms, polytrauma, treatment delay, prior closed reduction attempts, and closed reduction in the operating room) were not statistically associated with CS in our study. Clinicians should be wary for the development of CS whenever utilizing flexible nails for tibial shaft fractures, especially when the following co-morbidities are present: the child weighs greater than 50 kg, has complex/comminuted fracture patterns, or has a neurologic deficit in the absence of compartmental swelling prior to operative intervention.

Does the extent of prebending affect the stability of femoral shaft fractures stabilized by titanium elastic nails? A biomechanical investigation on an adolescent femur model

BACKGROUND

Elastic stable intramedullary nailing (ESIN) is a common procedure for stabilization of femoral shaft fractures in childhood. Prebending of the nail is generally recommended to achieve optimal nail tension at the fracture site. To our knowledge there are no published data on the effects of prebending on stability. The purpose of this biomechanical study was to compare the effects of different degrees of prebending on the stability of transverse femoral fractures after ESIN using a bone model.

METHODS

Standardized transverse midshaft fractures were created in 20 synthetic, biomechanically validated adolescent bones (4th Generation Composite Femur--Sawbones Europe AB, Sweden) that were stabilized with 2 titanium nails (TEN) each (4 mm diameter, Synthes) and inserted in standardized retrograde technique. The 4 test series addressed nail prebending at 0 degree, 30 degrees, 45 degrees, and 60 degrees. The models were tested biomechanically in 4-point bending in the coronal and sagittal planes, relative stiffness was determined and analyzed statistically. The level of significance was set at P < 0.05.

RESULTS

Comparison of the individual groups showed no significant differences in stiffness for different degrees of prebending in the coronal plane. Significantly reduced stiffness was found in the sagittal plane for the group with 60-degree prebending compared with the 0-degree, 30-degree, and 45-degree prebending groups. Intragroup comparison in the coronal and sagittal planes yielded a significantly reduced stiffness in the sagittal plane compared with the coronal plane in the group with 60-degree prebending. The 45-degree prebending group showed a similar tendency and in the 0-degree and 30-degree prebending groups there were no significant differences.

CONCLUSIONS

On a synthetic bone model, prebending of TEN was found to affect the stability of transverse fractures of the femoral shaft, whereby indiscriminate prebending will reduce stability in the sagittal plane.Despite limited extrapolation of the findings to the in vivo situation, it can be stated that prebending of TEN by 0 to 30 degrees offers the greatest stability in the coronal and sagittal planes for transverse fractures of the femoral shaft.

Treatment injuries are rare in children's femoral fractures

BACKGROUND AND PURPOSE

The current treatment for femoral fractures in children is mostly operative, which contrasts with treatment of other long bone fractures in children. We analyzed treatment injuries in such patients in Finland in order to identify avoidable injuries. Our other aims were to calculate the incidence of these fractures and to describe the treatment method used.

METHODS

The Patient Insurance Centre (PIC) provides financial compensation of patients who have sustained an injury in connection with medical care. We retrospectively analyzed incidence, treatment methods, and all compensation claims concerning treatment of femoral fractures in children who were 0-16 years of age during the 8-year period 1997-2004.

RESULTS

The incidence of childhood femoral fractures in Finland was 0.27 per 1,000 children aged < 17 years, and two-thirds of the patients were treated operatively during the study period. 30 compensation claims were submitted to PIC during the 8-year study period. The compensation claims mainly concerned pain, insufficient diagnosis or treatment, extra expenses, permanent disability, or inappropriate behavior of medical personnel. Of the claims, 16 of 30 were granted compensation. Compensation was granted for delay in treatment, unnecessary surgery, and for inappropriate surgical technique. The mean amount of compensation was 2,300 euros. Of the injuries that led to compensation, 11 of 16 were regarded as being avoidable in retrospect.

INTERPRETATION

The calculated risk of a treatment injury in childhood femoral fracture treatment in Finland is approximately 2%, and most of these injuries can be avoided with proper treatment.

Hexapodal external fixation in the management of children tibial fractures

Some tibial fractures in children require surgical osteosynthesis, mostly achieved by an internal fixation. Indications for external fixation in the management of tibial fractures in children are limited to specific clinical situations when conventional treatments are contraindicated. The aim of this study is to report the results of tibial fractures management by hexapodal external fixation. Eleven children were included in this study and all of them were treated by a specific hexapodal external fixator, with a 12-month mean follow-up. In the whole series, initial deformities were perfectly corrected in nine cases, two patients showed residual deformity that did not require further surgery. The mean time for external fixation was 98 days. Hexapodal external fixation seems to be a simple and effective definitive method for the correction of three-dimensional traumatic deformities requiring surgical stabilization. Long-term follow-up will be necessary to evaluate residual deformities at the end of patient's growth.

Elastic intramedullary nailing in unstable fractures of the paediatric tibial diaphysis: a systematic review

PURPOSE

The majority of paediatric tibial fractures can be managed conservatively. However, there is a small but significant group of patients that require surgical intervention for several indications, most notably, unstable fractures. There are various surgical options, each with its own advantages and risks. This review establishes the current available evidence for the use of elastic intramedullary nails in this group.

METHODS

A systematic review of the currently available literature was performed. The relevant studies were then critically appraised.

RESULTS

Seven applicable retrospective case series were identified, with the outcomes from a total of 210 (range 16-60) patients considered. The mean time to union ranged from 7 to 21 weeks. Reported complications included small numbers each of delayed union, non-union, malunion, leg length discrepancy and infection.

CONCLUSIONS

There is only a small body of evidence currently published on this topic. The evidence published so far concludes that elastic intramedullary nailing represents an effective and reliable method to treat an unstable fracture of the tibial diaphysis in the paediatric patient, where conservative management is not appropriate.

Biomechanical evaluation of retrograde intramedullary stabilization for femoral fractures: the effect of fracture level

BACKGROUND

Retrograde stabilization of mid-diaphysis adolescent femur fractures has shown excellent biomechanical stability. However, it is unclear whether adequate stability is maintained for distal femur fractures using the retrograde approach compared with the clinically recommended antegrade approach. The purpose of this study was to evaluate the biomechanical stability of retrograde and antegrade nailing for mid-diaphyseal and distal diaphysis femoral fractures.

METHODS

Twenty adolescent-sized synthetic femurs were randomly assigned to fracture location and surgical approach groups. Comminuted fractures were simulated at the mid-diaphysial level and 4 cm proximal to the distal physis. The retrograde approach used 2 c-shaped 3.5-mm titanium nails. The antegrade used c and s 3.5-mm nail configurations. Both techniques achieved maximum nail divergence at the level of the fracture. Biomechanical testing was conducted to determine differences in torsional range of motion (degrees)and failure load (N) at 5 mm. These data were analyzed with a 2-way analysis of variance (p < 0.05).

RESULTS

In torsion, there were no differences related to surgical approach or fracture level. For axial compression to 5 mm, the antegrade approach required significantly greater force to achieve 5 mm of compression compared with the retrograde approach. The mid-diaphyseal fracture required significantly greater force to achieve 5 mm of compression compared with the distal diaphysis group.

CONCLUSIONS

For maximum stabilization of a distal femur fracture, c- and s-shaped nails placed in the antegrade position is suggested.

CLINICAL RELEVANCE

Surgical decision making regarding the use of either the antegrade or retrograde approach will be influenced by both the stability provided (antegrade) and the ease of insertion (retrograde).

Titanium elastic nails for pediatric tibial shaft fractures

PURPOSE

The purpose of our study was to investigate the safety and efficacy of elastic stable intramedullary nailing for unstable pediatric tibial shaft fractures using titanium elastic nails (TENs). To our knowledge, this is the largest series reported in the literature of this specific fixation technique.

METHODS

We reviewed all children with tibial shaft fractures treated operatively at our tertiary care children's hospital to find those patients who underwent fixation with TENs. Between 1998 and 2005, we identified 19 consecutive patients who satisfied inclusion criteria. The average age of the patients in our series was 12.2 years (range 7.2-16 years), and mean follow-up was 15.7 months (range 6-28 months). Patient charts and radiographs were retrospectively reviewed to gather the clinical data. Outcomes were classified as excellent, satisfactory, or poor according to the Flynn classification for flexible nail fixation.

RESULTS

All patients achieved complete healing at a mean of 11.0 weeks (range 6-18 weeks). At final follow-up, mean angulation was 2 degrees (range 0 degrees -6 degrees ) in the sagittal plane and 3 degrees in the coronal plane (range 0 degrees -9 degrees ). Five patients (26%) complained of irritation at the nail entry site; there were no leg length discrepancies or physeal arrests as a result of treatment. Two patients required remanipulation after the index procedure to maintain adequate alignment. According to the Flynn classification, we had 12 excellent, six satisfactory, and one poor result.

CONCLUSION

Although the indications for operative fixation of pediatric tibial shaft fractures are rare, occasionally surgical treatment is warranted. Based on our results, elastic stable intramedullary nailing with titanium elastic nails is an effective surgical technique which allows rapid healing of tibial shaft fractures with an acceptable rate of complications.

Intramedullary Kirschner wire (K-wire) fixation of femoral fracture in children

PURPOSE

The aim of this study was to evaluate the efficacy of standard intramedullary Kirschner wires (K-wires) for the treatment of femoral shaft fracture in children.

METHODS

We report the results of intramedullary K-wires nailing in 178 children with a mean age of 7.7 years (range, 4-14 years) from 2000 to 2005, retrospectively. A total of 184 diaphyseal femoral fractures were treated with both antegrade and retrograde nailing using the same principles of elastic stable intramedullary nailing (ESIN). The patients were followed for 12 months on average (range, 6-24 months).

RESULTS

No major complication (limb length discrepancy >15 mm, non-union, avascular necrosis, knee joint stiffness) occurred during the observation period. All fractures healed within 7.1 weeks on average (range, 5-12 weeks). Associated injuries were seen in 16.9% of the cases. All but seven fractures were reduced by closed manipulation. Early mobilization and weight bearing was allowed. Intramedullary K-wires were removed after an average of 4.8 months (range, 3-12 months) without any complications.

CONCLUSIONS

In children, intramedullary fixation by using standard K-wires provides effective treatment for the diaphyseal femoral fracture that has excellent clinical results. Each intramedullary K-wire costs US $5, which adds a cost effective advantage to this method of treatment.