Approach to Tibial Shaft Nonunions: Diagnosis and Management

The tibia is the most common long bone at risk for nonunion with an annual incidence ranging from 12% to 19%. This topic continues to be an area of research as management techniques constantly evolve. A foundational knowledge of the fundamental concepts, etiology, and risk factors for nonunions is crucial for success. Treatment of tibial shaft nonunions often requires a multidisciplinary effort. This article provides guidance based on the most recent literature that can be used to aid the treating provider in the diagnosis, workup, and management of tibial shaft nonunions.

[Diagnostic and therapeutic work-up of infected tibial nonunion]

BACKGROUND

The failure of bone fracture healing is one of the major complications of fracture treatment, especially of the tibia due to its limited soft tissue coverage and high rate of open injuries. Although implant development is constantly progressing and modern surgical techniques are continuously improving, infected tibial nonunion plays a decisive role in terms of its variable clinical presentation.

OBJECTIVE

This article provides guidelines for the successful surgical treatment of infected tibial nonunion.

MATERIAL AND METHOD

Strategies are presented to identify infection as a cause of failure of fracture healing and to achieve infection and bone healing.

RESULTS

A significant amount of tibial nonunions primarily thought to be aseptic ultimately turn out to be infected nonunions.

CONCLUSION

The treatment of infected tibial nonunion requires extensive clinical, radiological and laboratory diagnostics as well as a profound biomechanical and biological understanding of the bone situation. This is the only way to achieve rapid osseous healing with as few revision interventions as possible.

[Non-union]

A non-union is a fracture that fails to heal within the expected time frame and occurs in approximately 3 to 5% of all fractures. Non-union has a negative impact on mental and physical functioning and quality of life. The causes, clinical presentation and treatment for non-union differ strongly on a case-by-case basis. By presenting three cases we aim to give healthcare providers more insight into the clinical scenario of non-union. In addition, we elaborate on characteristics, etiology, diagnostics and treatment of non-union.

[Infected nonunion: diagnostic and therapeutic work-up]

BACKGROUND

Septic nonunion is one of the major complications in fracture healing. The challenge is to identify the infection as the cause of nonunion first and then to achieve healing of the infection and the bone.

OBJECTIVE

Because of the more heterogeneous appearance of an infected nonunion, the prevalence of germ detection in surgical nonunion revision is often underestimated.

MATERIAL AND METHODS

In a retrospective study between 2010 and 2017, 86 patients with radiologically confirmed femoral shaft nonunion without clinical evidence and unremarkable medical history of a florid infection as the cause of nonunion, who had undergone primary single-stage surgical nonunion revision were analyzed. At least four intraoperatively obtained samples were evaluated for microbiological diagnosis. A distinction was made between tissue samples with subsequent 48‑h short-term incubation and tissue samples with 14-day long-term cultivation. The finding "germ detection" was made if at least two of the samples demonstrated bacterial growth.

RESULTS

In 18 of 86 patients with a nonunion preoperatively judged to be aseptic, positive bacterial evidence was obtained after short-term incubation. After long-term cultivation, positive bacterial detection was possible in 38 of 86 patients with a femoral shaft nonunion initially classified as aseptic. Regarding potential risk factors, the two groups demonstrated no relevant differences. In 29 patients, 1 pathogen was isolated from the obtained samples, whereas in the remaining 9 patients, a mixed culture with an average of 2.9 ± 0.5 different bacteria was detected. Identification revealed mainly low-virulence bacteria, most commonly Staphylococcus epidermidis.

CONCLUSION

If the preoperative diagnostics including clinical, laboratory and radiological examination as well as a careful anamnesis reveal indications of a possible infectious event, the surgical nonunion revision should be performed in two stages with specimen collection before definitive nonunion revision. For microbiological diagnosis, several representative tissue samples should independently be obtained from the nonunion site and incubated for 14 days. Only in the absence of evidence of septic nonunion is a single-stage procedure suggested.

The risk assessment model of fracture nonunion after intramedullary nailing for subtrochanteric femur fracture

ABSTRACT

To investigate the influencing factors of fracture nonunion after intramedullary nailing for subtrochanteric fractures and to construct a risk assessment model.Based on the multicenter retrospective analysis of 251 patients, all patients were divided into modeling group and verification group. In the modeling group, postoperative fracture nonunion rate, general data, fracture-related factors, surgical reduction-related factors, mechanical and biological factors were calculated, and the influencing factors of fracture nonunion were screened by univariate analysis. Logistic regression model was used for multifactor analysis to construct the risk assessment model. Based on the logistic regression model, the risk prediction model was constructed by drawing the Nomogram diagram. Through the verification group, the influencing factors were evaluated again, and the differentiation and calibration of the model were evaluated. The calibration degree was evaluated by Hosmer-Lemeshow test, goodness of fit test, and calibration curve. The discriminant degree was evaluated by the receiver operating characteristic curve.Fracture nonunion occurred in 34 of 149 patients in the modeling group. Among the 14 potential influencing factors, univariate analysis and logistic regression analysis showed that postoperative hip varus, intramedullary nail fixation failure, and reduction of fracture with large incision were the risk factors of fracture nonunion. The medial cortex fracture was seen reduced on X-Ray was a protective factor for fracture nonunion, and a regression equation was established. Based on the logistic regression model, the Nomogram diagram is drawn. Twenty-four cases of fracture nonunion occurred in the verification group. The area under the receiver operating characteristic curve was area under curve =0.883 > 0.7, indicating that there was a moderate differentiation to evaluate the occurrence of fracture nonunion after operation. The goodness of fit test: the Hosmers-Lemeshow test (X2 = 2.921, P = .712 > .05) showed that the model had a good calibration.After intramedullary nailing of subtrochanteric fracture, hip varus, failure of intramedullary nail fixation and wide surgical dissection are the risk factors of fracture nonunion, and the postoperative reduction of medial cortex fracture is protective factor.National key research and development projects: 2016YFC0105806.

The AMANDUS Project PART II-Advanced Microperfusion Assessed Non-Union Diagnostics with Contrast-Enhanced Ultrasound (CEUS): A Reliable Diagnostic Tool for the Management and Pre-operative Detection of Infected Upper-Limb Non-unions

The management of upper-limb non-unions can be challenging, especially when infection is existent. Thus, pre-operative detection of infection plays a relevant role in non-union treatment. This study investigated in a large cohort the diagnostic potential of contrast-enhanced ultrasound (CEUS) as stand-alone method for differentiating between aseptic and infected upper-limb non-unions. Osseous perfusion of 50 upper-extremity non-unions (radius/ulna, n = 20; humerus, n = 22; clavicle, n = 8) was prospectively assessed with CEUS before revision surgery. The perfusion was quantified via time-intensity curves and peak enhancement (in arbitrary units). Significant perfusion differences between aseptic and infected non-unions could be detected (peak enhancement, p < 0.001). The sensitivity and specificity for the detection of infected upper-limb non-unions were 80% and 94.3% (cutoff peak enhancement: 130.8 arbitrary units). CEUS reliably differentiates between aseptic and infected upper-limb non-unions. Consequently, CEUS should be integrated into the daily diagnostic routine algorithm to plan non-union revision surgery more precisely as a single- or multi-step procedure.

Tibial Fracture Healing Score: A Novel Tool to Predict Tibial Nonunion

The aim of the study was to investigate the utility of a simple office-based tool in predicting the need for secondary intervention to obtain union in patients with tibial fractures. All patients 18 years and older with isolated tibial shaft fractures (OTA 41A, 42A-C, and 43A) treated with intramedullary nailing from 2013 to 2017 were screened. Eighty-seven patients met enrollment criteria. Surgeon assessment of the following 3 clinical parameters was performed at routine office visits and scored as follows: (1) pain (none/mild/decreased=1, no change/increased=0); (2) function (minimal limp/able to perform a single-leg stance=1, significant limp/unable to perform single-leg stance=0); and (3) examination (no/minimal pain with manipulation=1, pain with manipulation=0). Radiographic healing was assessed by the adjusted radiographic union scale in tibial fractures (aRUST). The tibial fracture healing score (TFHS) is the sum of 3 clinical scores (0 to 3) and aRUST score (1 to 3) at 3 months postoperatively. The overall nonunion rate was 11%. A RUST score of 5 or less and a sum of the 3 clinical scores of less than 2 at 3 months were found be predictive of nonunion. A TFHS of less than 3 at 3 months was more reliable in identifying patients requiring nonunion repair, especially for those with minimal radiographic healing (RUST score 6 or 7) at 3 months. The TFHS is a simple office-based clinical tool that may identify patients at high risk of nonunion (TFHS <3) following isolated tibial shaft fracture more effectively than clinical examination or radiographic assessment alone. [Orthopedics. 2020;43(4);e323-e328.].

The challenge of the infected pilon tibial non-union: treatment with radical resection, bone transport and ankle arthrodesis

A significant number of patients with pilon tibial fractures develop complications, the most devastating being a combination of infection and non-union with bone loss. The results of the Ilizarov bone transport technique were retrospectively evaluated in ten patients. All underwent an extensive resection and reconstruction aiming at an ankle arthrodesis. The outcome was registered by clinical and radiographic examination as proposed by Paley's functional and bone results classification. A good healing at the level of the docking site could be obtained in all patients but with a re- intervention in 8 of the 10. In 5 of these patients, re-intervention with a transcalcaneal nailing leaded to the final healing. Other options are debridement of the docking site (2 patients) and a new Ilizarov procedure (1 patient). If patients are prepared to participate in a long-term treatment with the risk of multiple interventions a reconstruction can be performed, resulting in a limb with an acceptable function, allowing all activities of daily life and even a professional occupation. To obtain this final result with a definite union at the docking site a secondary retrograde intramedullary nailing is considered a valuable and safe procedure.

Epidemiology, Clinical Assessments, and Current Treatments of Nonunions

PURPOSE OF REVIEW

The failure of bony union following a fracture, termed a fracture nonunion, has severe patient morbidity and economic consequences. This review describes current consensuses and future directions of investigation for determining why, detecting when, and effective treatment if this complication occurs.

RECENT FINDINGS

Current nonunion investigation is emphasizing an expanded understanding of the biology of healing. This has led to assessments of the immune environment, multiple cytokines and morphogenetic factors, and the role of skeletogenic stem cells in the development of nonunion. Detecting biological markers and other objective diagnostic criteria is also a current objective of nonunion research. Treatment approaches in the near future will likely be dominated by the development of specific adjunct therapies to the nonunion surgical management, which will be informed by an expanded mechanistic understanding of nonunion biology. Current consensus among orthopedists is that improved diagnosis and treatment of nonunion hinges first on discoveries at the bench side with later translation to the clinic.

Chemokine analysis as a novel diagnostic modality in the early prediction of the outcome of non-union therapy: a matched pair analysis

BACKGROUND

Despite the regenerative capability of skeletal tissue fracture, non-union is common. Treatment of non-unions remains challenging, and early determination of the outcome is impossible. Chemokines play an important role in promoting the formation of new bone and remodeling existing bone. Despite their importance regarding the regulation of bone biology, the potential of chemokines as biological markers reflecting osseous regeneration is unknown. The purpose of this study was to determine (1) if serum chemokine expression levels correlate with the outcome of non-union surgery and (2) if chemokine expression analysis can be used to identify patients at risk for treatment failure.

METHODS

Non-union patients receiving surgical therapy in our institution between March 2012 and March 2014 were prospectively enrolled in a clinical observer study. Regular clinical and radiological follow-up was conducted for 12 months including collection of blood during the first 12 weeks. Based on the outcome, patients were declared as responders or non-responders to the therapy. To minimize biases, patients were matched (age, sex, body mass index (BMI)) and two groups of patients could be formed: responders (R, n = 10) and non-responders (NR, n = 10). Serum chemokine expression (CCL-2, CCL-3, CCL-4, CXCL-10, CCL-11, and interferon gamma (IFN-γ)) was analyzed using Luminex assays. Data was compared and correlated to the outcome.

RESULTS

CCL-3 expression in NR was significantly higher during the course of the study compared to R (p = 0.002), and the expression pattern of CCL-4 correlated with CCL-3 in both groups (NR: p < 0.001 and r = 0.63). IFN-γ expression in NR was continuously higher than in R (p < 0.001), and utilization of CCL-3 and IFN-γ serum expression levels 2 weeks after the treatment resulted in a predictive model that had an AUC of 0.92 (CI 0.74-1.00).

CONCLUSION

Serum chemokine expression analysis over time is a valid and promising diagnostic tool. The chemokine expression pattern correlates with the outcome of the Masquelet therapy of lower limb non-unions. Utilization of the serum analysis of CCL-3 and IFN-γ 2 weeks after the treatment resulted in an early predictive value regarding the differentiation between patients that are likely to heal and those that are prone to high risk of treatment failure.

Fracture healing: A review of clinical, imaging and laboratory diagnostic options

A fundamental issue in clinical orthopaedics is the determination of when a fracture is united. However, there are no established "gold standards," nor standardized methods for assessing union, which has resulted in significant disagreement among orthopaedic surgeons in both clinical practice and research. A great deal of investigative work has been directed to addressing this problem, with a number of exciting new techniques described. This review provides a brief summary of the burden of nonunion fractures and addresses some of the challenges related to the assessment of fracture healing. The tools currently available to determine union are discussed, including various imaging modalities, biomechanical testing methods, and laboratory and clinical assessments. The evaluation of fracture healing in the setting of both patient care and clinical research is integral to the orthopaedic practice. Weighted integration of several available metrics must be considered to create a composite outcome measure of patient prognosis.

Step-Cut Osteotomy for Recalcitrant Humeral Shaft Nonunion

The majority of humeral shaft nonunions resolve following operative intervention; however, a small percentage will persist despite surgical efforts. These cases of persistent nonunion are frustrating for patients and challenging for orthopedic surgeons. The authors describe the use of a step-cut osteotomy of the humeral diaphysis coupled with neutralization plating and autologous bone grafting for the management of humeral shaft nonunions that were recalcitrant to initial surgical management. In the authors' experience, this technique has been a valuable adjunct for obtaining adequate reduction and subsequent union in these complex cases. [Orthopedics. 2016; 39(3):e587-e591.].

Complications of Pediatric Elbow Fractures

Fractures about the elbow in children are common and varied. Both diagnosis and treatment can be challenging, and optimal treatment protocols continue to evolve with new research data. This article reviews common complications related to pediatric elbow fractures and presents recent literature to help guide treatment.

[Diagnosis and treatment of fracture delayed union and nonunion]

Fracture nonunion is the cessation of a normal reparative process of fracture healing. With an incidence of 2.5%-4.4%, it is one of difficult problem for orthopedics surgeons. Definition, classification, treatment and causes of fracture nonunion are reviewed in this article. The therapeutic principles and methods are introduced systematically combined with causes of fracture nonunion.

Prospective clinical trial of surgical intervention for painful rib fracture nonunion

We performed a prospective clinical trial of resection with or without plate fixation for symptomatic rib fracture nonunion three or more months postinjury with 6-month postoperative followup. The McGill Pain Questionnaire (MPQ) and RAND 36 Health Survey were administered and activity level (sedentary, ambulatory, moderately active, vigorous), functional status (disabled, nonphysical labor, physical labor), and work status (employed, unemployed, retired, student) were queried pre- and postoperatively. Twenty-four patients 4 to 197 months (median, 16 months) postinjury underwent surgical intervention for one to four rib fracture nonunions (median, two nonunions). Evidence of intercostal nerve entrapment was present in nine patients (38%). MPQ Present Pain Intensity and Pain Rating Index and RAND 36 Physical Functioning, Role Physical, Social Functioning, Role Social, Bodily Pain, Vitality, Mental Health, and General Health were significantly improved at six months compared with study entry (P < 0.05). Activity levels significantly improved (P < 0.0001) but functional and work status did not change. Twenty-four-hour morphine equivalent dosage of opioids at study entry was 20.3 ± 30.8 (mean ± standard deviation) and at study completion was 9.4 ± 17.5 (P = 0.054). Complications included one wound infection, two partial screw backouts, and one chest wall hernia at one year after resection of adjacent nonunions with significant gaps repaired with absorbable plates. Surgical intervention for rib fracture nonunion may improve chronic pain and disability but without change in functional or work status. Resection of adjacent nonunions with significant gaps may lead to chest wall hernia.

Ilizarov external fixator for length salvage in infected amputated nonunions

The technique of compression distraction induced osteogenesis via the Ilizarov external fixator system has been used for a variety of traumatic limb pathologies that necessitate boney union and limb preservation. In this case report, we describe an uncommon scenario were an Ilizarov external fixator was used to treat an infected nonunion following a below knee amputation.

Non-union in forearm fractures

Non-union in forearm fractures is an uncommon but complex problem. This is especially given the unique anatomical structure and function of the forearm, making treatment distinctly different to that of other long bone fractures. Anatomical restoration of length, alignment, rotation and the radial bow maintains the optimal stabilising effects of the forearm muscles and interosseous membrane, as well as maximising the range of movement, particularly pronation and supination. Contemporary plate osteosynthesis using variations of the dynamic compression plate (DCP) developed by the AO group combined with established techniques of internal fixation have revolutionised the treatment of diaphyseal forearm fractures. Non-union rates have been minimised to below 5% and good to excellent functional outcomes are achieved. Non-union of the forearm is also intimately associated with a significant pain experience, marked pre-operative functional disability and physical and psychosocial morbidity. This review examines the literature and presents a guide to management as well as the current controversies and future directions related to this challenging problem.

Corrective arthrodeses and osteotomies for post-traumatic hindfoot malalignment: indications, techniques, results

Hindfoot malunions after fractures of the talus and calcaneus lead to severe disability and pain. Corrective osteotomies and arthrodeses aim at functional rehabilitation and reduction of pain resulting from post-traumatic arthritis, eccentric loading and impingement due to hindfoot malunion. Preoperative analysis should include the three-dimensional outline of the malunion, the presence of post-traumatic arthritis, non-union, or infection, the extent of any avascular necrosis or comorbidities. In properly selected, compliant patients with intact cartilage cover little or no, AVN, and adequate bone quality, a corrective joint-preserving osteotomy with secondary internal fixation may be carried out. In the majority of cases, realignment is augmented by arthrodesis for post-traumatic arthritis. Fusion is restricted to the affected joint(s) to minimise loss of function. Correction of the malunion is achieved by asymmetric joint resection, distraction and structural bone grafting with corrective osteotomies for severe axial malalignment. Bone grafting is also needed after resection of a fibrous non-union, sclerotic or necrotic bone. Numerous clinical studies have shown substantial functional improvement and high subjective satisfaction rates from pain reduction after corrective osteotomies and fusions for post-traumatic hindfoot malalignment. This article reviews the indications, techniques and results of corrective surgery after talar and calcaneal malunions and nonunions based on an easy-to-use classification.

Risk factors affecting progressive collapse of acute osteoporotic spinal fractures

We prospectively investigated related clinical and radiological risk factors for progression following acute osteoporotic spinal fractures. Fracture location, morphological feature (mid-portion), and involvement of vertebral posterior wall were statistical significant risk factors considering increase of height loss and kyphotic angle, and occurrence of intravertebral cleft sign as a progressive collapse.

INTRODUCTION

This study was designed to investigate the clinical and radiological risk factors related to progressive collapse of acute osteoporotic spinal fractures (OSF).

METHODS

In total, 100 patients with acute OSF were prospectively enrolled at a single institute. Five pathological fractures were excluded. Twelve patients dropped out of the study because of conversion to surgical treatment during follow-up. Eight patients were excluded as follow-up losses. Thus, 75 patients were analyzed. Clinical data and radiological data were recorded and analyzed. As a definition of progressive OSF, height loss≥15%, kyphotic angle≥10°, and the occurrence of an intravertebral cleft sign at the 6-month follow-up compared to the initial values were adopted. Correlation analysis and multiple logistic regression analyses were performed to elucidate the related clinical or radiological factors for progressive OSF.

RESULTS

The occurrence of intravertebral cleft was not related to any significant differences in the clinical results and was only related to the fracture level in the regression analysis. A ≥15% increase in height loss and a ≥10° increase in kyphotic angle were related to worse clinical results. Mid-portion type fractures and involvement of the posterior wall were significant risk factors with relatively high odds ratios for progressive OSF under these criteria.

CONCLUSION

A thoracolumbar fracture, a mid-portion type fracture, and involvement of the vertebral posterior wall are relative risk factors for progressive collapse following acute OSF. More attention should be paid to patients with OSF and these risk factors during conservative management.

Accuracy of ICD-9 codes to identify nonunion and malunion and developing algorithms to improve case-finding of nonunion and malunion

OBJECTIVE

To evaluate the accuracy of using ICD-9 codes to identify nonunions (NU) and malunions (MU) among adults with a prior fracture code and to explore case-finding algorithms.

STUDY DESIGN

Medical chart review of potential NU (N=300) and MU (N=288) cases. True NU cases had evidence of NU and no evidence of MU in the chart (and vice versa for MUs) or were confirmed by the study clinician. Positive predictive values (PPV) were calculated for ICD-9 codes. Case-finding algorithms were developed by a classification and regression tree analysis using additional automated data, and these algorithms were compared to true case status.

SETTING

Group Health Cooperative.

RESULTS

Compared to true cases as determined from chart review, the PPV of ICD-9 codes for NU and MU were 89% (95% CI, 85-92%) and 47% (95% CI, 41-53%), respectively. A higher proportion of true cases (NU: 95%; 95% CI, 90-98%; MU: 56%; 95% CI, 47-66%) were found among subjects with 1+ additional codes occurring in the 12months following the initial code. There was no case-finding algorithm for NU developed given the high PPV of ICD-9 codes. For MU, the best case-finding algorithm classified people as an MU case if they had a fracture in the forearm, hand, or skull and had no visit with an NU diagnosis code in the 12-month post MU diagnosis. PPV for this MU case-finding algorithm increased to 84%.

CONCLUSIONS

Identifying NUs with its ICD-9 code is reasonable. Identifying MUs with automated data can be improved by using a case-finding algorithm that uses additional information. Further validation of the MU algorithms in different populations is needed, as well as exploration of its performance in a larger sample.

The treatment of the proximal humeral fracture with the use of the PHN Nailing System: the importance of reduction

PURPOSE OF THE STUDY

Intramedullary nailing is a minimally invasive technique that respects humeral head. However, limited surgical approach does not permit an anatomical reduction. The significance of the reduction on the functional outcome has not been sufficiently investigated. The aim of the study was to examine the functional and radiological postoperative outcome in patients with proximal humeral fractures treated with intramedullary nailing and the significance of reduction.

MATERIALS AND METHODS

The study population consisted of 43 patients with proximal humeral fractures that were treated with the Proximal Humerus Nail System (Targon, Aesculap). Mean follow-up period was 23.2 months (SD: 8.9). Shoulder function was assessed with the Constant-Murley Score. Reduction was examined radiographically anteroposterior and true lateral plane. Radiographs of 50 healthy shoulders served as controls. Malreduction was analyzed for 10°, 15° and 20° in both planes.

RESULTS

The overall functional results were satisfying; mean CS of all patients at the last follow-up visit was 74.8 (SD: 19.3). Mean normalized CS for age and gender was 78.15 (SD 17.8). Fracture severity seemed to affect clinical outcome to a certain extent; 4-part fractures exhibited inferior results. Mean NSA was 126.5 (SD: 16.9) in anteroposterio and 137.4 (SD: 15.4) in true lateral view. The respective values in the control group were 134.1° (SD 7.1°) in anteroposterior and 133.7° (SD 12.8°) in true lateral view. A malreduction of >20° in the anteroposterior plane and >15° in both anteroposterior and true lateral planes resulted in significantly inferior clinical outcome. Thirteen complications were recorded, four of them being major. DISCUSSION The quality of reduction affected the postoperative outcome to a certain extent. Especially the anteroposterior reduction seemed to play a more important role in the postoperative function than reduction in the true lateral plane. However, this difference was statistically significant only after > 20° malreduction. The worst results in Constant Score were shown, as expected, in the group with malreduction in both planes; even a 15°malreduction resulted in statistically significant difference. The importance of anteroposterior reduction could be due to achievement of better ROM in the frontal plane, most probably because of better levers on the tuberosities. However an absolute anatomical reduction does not have to be achieved at all costs. The overall good results of the fractures in this study despite absence of anatomical reduction could partly result from the limited surgical approach.

CONCLUSIONS

The majority of the patients treated with closed reduction and internal fixation with PHN show good postoperative functional results. However, fracture malreduction reduction cannot be always avoided with the use of PHN. Nevertheless, the evaluation of the Constant-Murley score shows an absolute anatomical reduction in not necessary for satisfying functional outcome. The reduction in anteroposterior plane seems to play a more important role in the postsurgical functional outcome. A malreduction that exceeds 15° in both planes or a malreduction of more than 20° in either plane should be avoided.

Distal metaphyseal radius fractures in children following closed reduction and casting: can loss of reduction be predicted?

PURPOSE

The aim of this study was to identify factors which contribute to loss of reduction (LOR).

METHODS

Outpatient records and initial, post-reduction (PR) and follow-up radiographs of patients with a distal radial metaphyseal fracture were reviewed to determine demographic factors; fracture characteristics (obliquity, comminution, intact ulna); three-point cast index (3PI); and initial, PR, and follow-up displacement (angulation and translation in the sagittal and coronal planes). Univariate and multivariate regression were used to identify significant risk factors for LOR.

RESULTS

A total of 161 patients were included in our series (119 boys and 42 girls). Fifty-seven (35%) patients met the criteria for LOR. Multivariate logistic regression revealed that patients over 14 years old were 4.8 times more likely (p=0.01) to lose reduction, and those with more than 10% PR translation in the sagittal plane were four times more likely (p=0.03) to lose reduction. In younger patients, initial coronal translation and PR sagittal translation were independent risk factors. Patients with over 10% initial translation in the coronal plane were 2.4 times more likely (p=0.01) to lose reduction, and those with over 10% PR translation in the sagittal plane were 2.7 times more likely (p=0.03) to lose reduction. Three point cast index was not found to be a significant risk factor (1.64 vs. 1.57, p=0.43).

CONCLUSION

Our study, the largest dedicated series of distal radial metaphyseal fractures, indicates that loss of reduction is common. Our analysis suggests that an anatomical reduction, which minimises residual translation, is the most important variable in preventing a loss of reduction.

A complex injury of the distal ulnar physis: a case report and brief review of the literature

Physeal fractures of the distal forearm are common injuries in children and adolescents. However, Salter-Harris type III and type IV fractures of the distal ulnar epiphysis are often high-energy injuries that require open reduction for restoration of anatomical alignment. These injuries are uncommon and there are few descriptions of them in the contemporary literature. Here we report the case of a 13-year-old boy with a type IV distal ulna fracture not diagnosed with standard radiography. After closed manipulation, an incompletely reduced physis was suspected on the basis of fluoroscopic imaging and comparison radiographs of the contralateral wrist. Computed tomography showed a large, displaced physeal fragment. The patient underwent open reduction and internal fixation. Thorough radiographic assessment should be conducted when there is a high suspicion for these fracture patterns. Appropriate diagnosis can lead to expedient reduction and expectant management of sequelae associated with these injuries.

Tetrafocal leg reconstruction using combined Ilizarov/TSF technique

Treatment of segmental tibial bone defects after high-energy trauma or atrophic nonunion resection is challenging. In the last two decades, distraction osteogenesis Ilizarov bone transport has become a gold standard for the treatment of segmental tibial bone defects and lengthening in spite of the fact that frequent frame modifications and the need for sequential correction of deformities during bone transport are the main limitations of the device itself. The Taylor Spatial Frame applies the concept of the Stewart platform to the standard Ilizarov frame while applying the same principles of distraction osteogenesis postulated by Ilizarov. We report the case of a patient with two problems we could treat simultaneously: an ankle equinus contracture (a consequence of limb leg discrepancy) and infected tibial nonunion and soft-tissue damage complication after plating in a 41A3 type II Gustilo fracture of the left leg.

Current concepts review: carpal injuries - fractures, ligaments, dislocations

An overview about current concepts in treating carpal injuries is presented. These injuries are more commonly seen in young, active individuals after a fall on an outstretched hand. Conventional radiographs and a thorough examination are important. The scaphoid is the most affected bone. Scaphoid fractures can be classified in accordance to OTA, AO, and other classification systems, but mostly to Herbert. It can be treated non-operatively if undisplaced, however a percutaneous internal fixation can be discussed to achieve earlier return to work and shorter time to union, but hazarding the consequences of an operation. Unstable, proximal pole, or delayed diagnosed scaphoid fractures should be treated surgically. Nonunion is seen in 5 - 40% of scaphoid fractures depending mainly on displacement and localization of the fracture. The gold standard in non-osteoarthritic scaphoid nonunion is debridement of the nonunion site, bone grafting, realignment, stable fixation and rehabilitation. The treatment of scaphoid-nonunion advanced collapse is more complex. Proximal row carpectomy or arthrodesis (four-corner or complete wrist) can be mandatory. Other carpal bone fractures are rare. Perilunate dislocations are also uncommon but can be disabling. They usually originate in high-energy trauma. The Mayfield stages help to understand the injury pattern. Open reduction through both volar and dorsal approaches, repair of the volar capsule as well as volar and dorsal ligaments, and internal fixation is commonly the standard treatment. However osteoarthritis and carpal instability are often encountered.

Non-union of an undisplaced radial styloid fracture in a heavy smoker: revisiting the association of smoking and bone healing

Isolated radial styloid fractures occur relatively infrequently, with non-union of such fractures, especially when undisplaced, being highly unusual. Smoking of tobacco, a common habit which is decreasing in prevalence in the developed world, has been proven to exert many adverse effects on tissue healing including bone union. We present a case of non-union of an undisplaced radial styloid fracture in the dominant hand of a young and healthy heavy smoker, emphasising the negative impact of tobacco smoke and its association with bone repair. We suggest that heavy tobacco users should also be followed up more vigilantly with this complication in mind, with smoking cessation modalities being offered on presentation.

Variable pitch headless compression screw treatment of distal phalangeal nonunions

Nonunions of the shaft of the distal phalanx, as opposed to the tuft, are usually symptomatic enough to warrant treatment. One method that has proven successful while minimizing complications is compression fixation using variable pitch headless screws inserted percutaneously. Eighteen patients (15 males, 3 females) with a mean age of 48 years were so treated under digital block anesthesia. Seven of 18 (39%) patients were smokers. All initial injuries were crush trauma to the distal phalanx with 10/18 (56%) initially open fractures. Treatment was to 3 thumbs, 6 index fingers, 6 long, 2 ring, and 1 small. Fixation was with micro-sized variable pitch cannulated headless screws except 1 case that used 2 noncannulated threaded taper pins to compress a 3 fragment nonunion. Surgery to treat nonunion occurred at a mean of 13 weeks after the initial injury. Time to union was determined by combined clinical and radiographic assessment. The clinical criterion for union was the absence of pain at the nonunion site with application of maximum pinch pressure to the ipsilateral thumb or finger. The radiographic criteria for union was bridging trabeculae seen on 2 or more cortices and the absence of any signs of hardware loosening, using standard posteroanterior and lateral projections. All 18 patients went on to achieve union at a mean of 9 (±2.8) weeks after surgery. Complications specifically sought out but not identified were infection, loss of reduction, further comminution, hardware loosening, secondary surgery, nail deformity, and continued pain precluding successful pinch.

Pelvic ring disruptions: treatment modalities and analysis of outcomes

A systematic review of the English literature over the last 30 years was conducted in order to investigate the correlation of the clinical outcome of different types of pelvic ring injuries to the method of treatment. Three basic therapeutic approaches were analysed: non-operative treatment (group A), stabilisation of anterior pelvis (group B) and internal fixation of posterior pelvis (group C). Of 818 retrieved reports, 27 case series, with 28 groups of patients and 1,641 patients, met our inclusion criteria. The quality of the literature was evaluated using a structured questionnaire. Outcomes of the eligible studies were summarised by the medians of the reported results. Most of the component studies were of fair or poor quality. Certain radiological results (quality of reduction, malunion rates) were significantly better in group C. From the functional point of view only walking capacity was proved to be significantly better in the groups of operative treatment compared to the non-operative group.

[Diagnosis and treatment of tubular bone fractures complicated by defective consolidation of bone fragments in children and adolescents]

Over 3500 cases of long bone fracture in children and adolescents were analysed by objective methods including USG, CT, osteodensitometry, thermography, polarography, and radionuclide studies. A group of patients with delayed consolidation of bone fragments was distinguished based on the results of clinical and instrumental investigations. Diagnostic criteria and early signs of delayed consolidation were established. Methods for the treatment of such children were improved taking into account localization of the fracture, clinical signs of delayed consolidation and its underlying causes.

The value of laboratory and imaging studies in the evaluation of long-bone non-unions

Delayed union and non-union are common but definitive diagnosis is difficult. Few studies have evaluated imaging methods and laboratory parameters in the distinction between normal and prolonged heating specifically of long-bone fractures. The values of newer imaging methods have been analysed in some cases and should be the subject of further clinical trials. Biological markers may facilitate the earliest diagnosis of delayed union. Preliminary studies of these are limited and more trials are needed. To date it is still difficult to predict accurately a normal consolidation of bone.

Evaluation of nonunions of the tibia diaphysis - own experience

BACKGROUND

Delayed union is not an expected outcome of treatment of a bone fracture. The cause of the delayed union must be established before treatment of the complication can be undertaken. The method of treatment depends mainly on the specific nature of delayed bone union. The study evaluates the causes of delayed bone union during treatment of tibial shaft fractures.

MATERIAL AND METHODS

Seventy-two patients with delayed union following a fracture of the tibial diaphysis were treated in the Department of Orthopaedics and Musculoskeletal Traumatology of Wrocław Medical University between 1995 and 2005. All patients had received previous treatment of the fractures. Depending on the morphology of the delayed union, the treatment was with Ilizarov's compression-distraction method or autologous osteoplasty with intramedullary, internal or external fixation. The choice of a method was based on an analysis of the features of the non-union while fracture morphology, presence of other concomitant sequelae of the original injury, fixation method and possible surgical errors, post-operative patient management, co-morbidity and patient compliance were evaluated as risk factors of delayed bone union. The risk factors were subdivided into treatment-dependent (external) and treatment-independent (internal). Treatment outcomes were evaluated on the basis of an orthopaedic examination and radiographic evidence.

RESULTS

In the vast majority of patients, delayed union of the tibial diaphysis was due to external factors.

CONCLUSIONS

Delayed union of the tibia can be avoided through early and simultaneous treatment of all sequelae of the original trauma. Patient management must be based on state-of-the-art medical knowledge.

Arthroscopic treatment of nonunited anterior cruciate ligament tibial avulsion fracture with figure-of-8 suture fixation technique

PURPOSE

The purpose of this study was to evaluate the clinical results of arthroscopic treatment of nonunited anterior cruciate ligament (ACL) tibial avulsion fracture with a figure-of-8 suture fixation technique.

METHODS

Nineteen cases of nonunited ACL tibial avulsion fracture were treated with an arthroscopic figure-of-8 suture fixation technique. The patients were followed up and evaluated according to the International Knee Documentation Committee, Lysholm, and Tegner rating scales.

RESULTS

The time interval between the previous injury and this operation was 1 to 8 years, with a mean of 3.6 years. Eighteen patients were followed up for more than 2 years (range, 24 to 30 months; mean, 26 months). The fracture was united within 3 months after surgery in all cases. At the latest follow-up, there was neither extension nor flexion limitation in all patients. With the exception of 1 patient who had a 1 degrees positive Lachman test with a firm end-point, all of the patients had a negative Lachman test. The side-to-side difference in knee anterior laxity was 0 to 2 mm in 17 patients and 4 mm in 1 patient. The Lysholm score was 91 to 100, with a mean of 96.7 +/- 1.9 (compared with 74.3 +/- 4.6 before surgery, P < .05). Fifteen patients returned to their former activity level. The Tegner scores before injury, preoperatively, and at latest follow-up were 6.1 +/- 0.6, 3.6 +/- 1.0, and 6.0 +/- 0.8, respectively; there was no statistically significant difference between the preinjury and postoperative Tegner scores (P > .05). According to the International Knee Documentation Committee scale, 17 patients' knees were graded as normal and 1 patient's knee was nearly normal.

CONCLUSIONS

Arthroscopic treatment of nonunited ACL tibial avulsion fracture with a figure-of-8 suture fixation technique can ensure fracture healing and restore the stability and function of the joint in most patients.

LEVEL OF EVIDENCE

Level IV, therapeutic case series.

Scaphoid fractures and nonunions: diagnosis and treatment

BACKGROUND

Scaphoid fractures are commonly seen in orthopedic practice. An organized and thoughtful approach to diagnosis and treatment can facilitate good outcomes. However, despite optimal treatment, complications may ensue. In the setting of nonunion or an avascular proximal pole, vascularized bone grafting may be needed.

METHODS AND RESULTS

In this article we review the literature regarding these injuries and describe an approach to diagnosis, treatment, and management of scaphoid fractures and nonunions.

CONCLUSION

Scaphoid fractures and nonunions may present as challenging problems in practice, but a systematic and deliberate approach can facilitate optimal results.

Nonunion of olecranon stress fractures in adolescent baseball pitchers: a case series of 5 athletes

BACKGROUND

Adolescent athletes participating in overhead throwing sports suffer a variety of overuse elbow injuries, many of which have been well described in the literature. Nonunion stress fractures of the olecranon across the epiphyseal plate, however, have received little attention.

PURPOSE

To describe this unusual clinical entity in the differential diagnosis of the adolescent athlete with elbow pain and to demonstrate that operative treatment is an effective means of quickly and safely returning the patient to sporting activities.

STUDY DESIGN

Case series; Level of evidence, 4.

METHODS

Five adolescent baseball pitchers (mean age, 15 years) who suffered chronic elbow pain and who were diagnosed with olecranon epiphyseal stress fracture nonunions were treated with open reduction and internal fixation using a 7.0 cancellous screw and washer with or without 18-gauge tension banding.

RESULTS

Return to preoperative range of motion was achieved at a mean of 8.6 weeks (range, 3.4-16.6 weeks). Patients were clinically asymptomatic at a mean of 11 weeks (range, 7.7-13.6 weeks) after surgery. Radiographic evidence of stress fracture union was achieved at a mean of 15.4 weeks (range, 6.1-33 weeks), including 1 patient with a delayed union according to radiographs, which healed at 33 weeks. Patients were started on a light strengthening program at 5 to 7 weeks and a throwing progression program at 15.6 weeks (range, 6.4-28.1 weeks). All 5 patients were able to return to their previous level of activities, with a mean return time of 29.4 weeks (range, 18.9-40.4 weeks).

CONCLUSION

Surgical management of olecranon apophysis stress fractures provided excellent results with minimal complications in this series of 5 consecutive cases.

Chronic posttraumatic osteomyelitis and infected nonunion of the tibia: current management concepts

Chronic posttraumatic osteomyelitis and infected nonunion of the tibia are complex problems that result in considerable morbidity and can threaten viability of the limb. Development of infection may result from compromised soft tissue and bone vascularity, systemic compromise of the host, and virulent or resistant organisms. Biofilm formation on implant and devascularized bone surfaces protects pathogens and may lead to persistence of infection. Management is based on a detailed evaluation of the patient, the involved bone and soft tissues, degree of associated lower extremity injury, and type of bacterial pathogens. Infection control is achieved with radical débridement, skeletal stabilization, and microbial-specific antibiotics. Local antibiotic delivery is a useful supplement to systemic administration. Local or free muscle flaps may be necessary to achieve soft-tissue coverage. Restoration of bone defects and bony union can be accomplished with bone grafting. However, large defects require complex reconstructive procedures, such as distraction osteogenesis and vascularized bone grafting.

Does three-dimensional computer simulation improve results of scaphoid nonunion surgery?

The purpose of this study was to clarify the effectiveness of the three-dimensional computer simulations in scaphoid nonunion surgery. Seven consecutive clinical patients with scaphoid nonunion at the middle third comprised the study group. Surface models of the scaphoid were constructed on the computer using computed tomography data of the bilateral wrists in neutral position. The distal and proximal fragments of the nonunion model were matched to the mirror image of the contralateral scaphoid model. The rotation of the distal fragment relative to the proximal fragment was calculated, and reduction of the displaced fragment of the scaphoid nonunion was simulated. Similarly, the estimated bone defect and the appropriate site and direction of the screw insertion were simulated. Full-sized hard models of the bone, including a model with simulated reduction and screw insertion, then were made using stereolithography based on the computer data. In the actual surgery, reduction, bone grafting, and screw insertion were achieved using the hard models as guides. All the patients obtained solid bone fusion and substantial clinical improvement with normalized scapholunate and radiolunate angles after surgery. Three-dimensional computer simulations were found as useful for accurate correction of scaphoid nonunions and proper screw placement, which consequently leads to good clinical results.

Current perspectives in the management of scaphoid nonunions

When left untreated, scaphoid fractures follow a downward spiral resulting in carpal collapse and arthritis. The purpose of intervention is to allow a cartilage-wrapped bone to heal and maintain a smooth articular surface. Proposed treatment options for scaphoid nonunions have varied success rates. Using the Mack-Lichtman classification for nonunions, a plan can be formulated for individual patients based on motion loss, degenerative changes, carpal collapse, and fracture instability manifested by bone loss. Stable nonunions may benefit from bone grafting and internal fixation. Unstable nonunions require grafting and fixation. With the development of arthritis, grafting and fixation must be weighed against suitability of a proximal row carpectomy or a four-corner fusion with scaphoid excision. Advanced carpal collapse and arthritis mandates fusion, either limited or complete. CT allows preoperative planning to assess grafting requirements. MRI defines vascular supply fa vascular graft is considered. Vascularized graft options have multiplied as attention has been focused on the impact of improved blood supply on the avascular scaphoid. Patient- and fracture-specific factors are important considerations when determining surgical options; underestimating their importance can compromise surgical results even with a high level of technical skill. Successful treatment of scaphoid nonunions remains a difficult challenge despite improvement in fixation devices and surgical options. By regarding injury status together with patient factors, surgical options can be narrowed and patient expectations managed more realistically.

HIV-assoziiertes Lymphom ? ungew�hnliche Ursache einer pathologischen Unterkieferfraktur

Despite the introduction of highly active antiretroviral therapy (HAART), diffuse large B-cell lymphoma (DLBCL) remains a common malignancy in human immunodeficiency virus (HIV)-infected patients, especially the plasmablastic variant. About 50% of lymphomas in HIV patients are extranodal and half of them occur in the head and neck area. The main oral symptoms are pain, swelling, numbness and tooth mobility. We report the case of a 52-year-old patient with a known HIV infection and fracture of the angular region of the mandible. The fracture did not unite following open reduction and osteosynthesis. A biopsy performed at the time of revision revealed the diagnosis of a primary lymphoma in the mandible. After chemotherapy had induced complete remission of the lymphoma and autogenous iliac crest bone grafting had been performed the fracture united. Primary lymphoma in the mandible is a disease that presents with a nonspecific radiological appearance which may mimic osteomyelitis or periodontal pathology. A rapid and accurate diagnosis is critical for the appropriate treatment. In our experience HIV-positive patients with mandibular fracture should be treated according to the guidelines established for HIV-negative patients. However, risky compromises such as intraoral approach or hazardous fracture fixation should be avoided.

Avascular necrosis and nonunion after osteosynthesis of femoral neck fractures: effect of fracture displacement and time to surgery

This study assessed the effect of fracture displacement and elapsed time before surgery on the development of avascular necrosis and nonunion after internal fixation of femoral neck fractures. Twenty-eight patients with 30 femoral neck fractures who underwent internal fixation and completed a minimum of 2 years' follow-up were retrospectively analyzed. The rates of avascular necrosis and nonunion were 12.5% and 25%, respectively, among patients who underwent surgery before 12 hours had elapsed and 14% and 27% among those who underwent surgery after that time. The rates of avascular necrosis and nonunion associated with fracture displacement were 6% and 18%, respectively, among patients with undisplaced (Garden stages 1 and 2) fractures and 23% and 38% among those with displaced (Garden stages 3 and 4) fractures. Nonunion and avascular necrosis led to the necessity for additional surgery in 11 of 30 (36%) hips. Internal fixation of femoral neck fractures is associated with a high initial complication rate, but if successful, the procedure ensures an excellent long-term outcome. Internal fixation should be considered the treatment of choice in young patients with nondisplaced fractures.

Non-union of acetabular fractures

Non-unions of acetabulum are rare. Seven cases of acetabular non-unions are reported in this retrospective study. Five out of our seven patients had either transverse or associated transverse with posterior wall fractures. All patients had surgical stabilisation of their index fractures. A diagnosis of non-union was made at an average of 5.8 months from the original injury based on clinical and radiological features. Five of the six patients who underwent re-stabilisation and bone grafting of the non-union healed where as the remaining one did not heal after two attempts at re-stabilisation and was treated with excision arthroplasty. Two of the healed five, subsequently developed osteoarthritis and had total hip arthroplasty where as one patient had already developed degeneration of his hip at the time of diagnosis and hence treated with total hip arthroplasty. Analysis of the non-unions confirmed that fixation was unstable in all with residual displacement seen in two of them. In conclusion acetabular fracture non-union appear to be associated with transverse fractures and unstable fixation.

Scaphoid nonunion: diagnosis and treatment

LEARNING OBJECTIVES

After studying this article, the participant should be able to: 1. Understand the anatomy and pathophysiology of scaphoid fractures. 2. Understand the risk factors for scaphoid nonunion. 3. Identify treatment options for scaphoid nonunion and their respective advantages and disadvantages. 4. Identify salvage procedures for scaphoid nonunion advanced collapse of the wrist. Scaphoid nonunion is a common but difficult problem for hand surgeons. The diagnosis of scaphoid nonunion is often delayed, and therefore, treatment must be tailored to the type of fracture, the duration of nonunion, and the presence or absence of resulting arthritis. This article reviews the diagnosis and work-up of scaphoid nonunion, classification schemes for scaphoid nonunion, and various treatment options, including internal fixation, nonvascularized and vascularized bone grafting, and salvage procedures.

Management of scaphoid nonunions

Scaphoid nonunions result in a predictable pattern of wrist arthrosis. To minimize the incidence of arthrosis, the goal of treatment should be consolidation of the fracture with the scaphoid in anatomic alignment. Computed tomography and magnetic resonance imaging scans can aid evaluation of carpal collapse, scaphoid collapse, scaphoid nonunion, bone loss, and detection of osteonecrosis. Nonunion of the scaphoid waist may result in a humpback deformity, increasing the chances of further collapse and arthrosis. This collapse deformity must be approached volarly with an intercalary bone graft and internal fixation. A dorsal approach to proximal scaphoid nonunions allows easier access for removing the necrotic bone from the proximal pole and applying accurate screw or pin fixation. Vascularized bone graft is recommended to manage scaphoid nonunions with osteonecrosis.