Rim Plating of Posterolateral Fracture Fragments (PLFs) Through a Modified Anterolateral Approach in Tibial Plateau Fractures

Biomechanical analysis of tibial plateau posterolateral fracture fragment fixation and introduction of a lateral tibia plateau hook plate system

BACKGROUND

Fixing the posterolateral fragments of tibial plateau fractures has been challenging owing to potential neurovascular injuries and fibular head blocks. Several surgical approaches and fixation techniques have been reported, with distinct limitations. We propose a novel lateral tibia plateau hook plate system and compare its biomechanical stability with other fixation methods.

METHODS

Twenty-four synthetic tibia models were simulated to present posterolateral tibial plateau fractures. These models were randomly assigned to three groups. Group A models were fixed with the lateral tibia plateau hook plate system, Group B with variable-angle anterolateral locking compression plates, and Group C with direct posterior buttress plates. The models' biomechanical stability was evaluated using static (gradually increased axial compressive loads) and fatigue (cyclically loaded from 100 to 600 N for 2000 cycles each) tests.

RESULTS

Groups A and C models exhibited comparable axial stiffness, subsidence load, failure load, and displacement in the static test. Group A model exhibited higher subsidence and failure loads than Group B model. Groups A and C models exhibited comparable displacement at 100 N cyclic loading in the fatigue test. Group C model was more stable at higher loads. Group C model endured the highest subsidence cycle numbers, followed by Groups A and B models.

CONCLUSIONS

The lateral tibia plateau hook plate system provided similar static biomechanical stability as the direct posterior buttress plates and comparable dynamic stability under limited axial loading. This system is a potential posterolateral treatment choice owing to its convenience and safety, in treating tibia plateau fractures.

Evaluation and Management of Posterior Tibial Plateau Fractures

Tibial plateau fractures are caused by high-energy or low-energy trauma and result in complex injuries that require careful management of both osseous injuries and associated soft tissues. The posterior aspect of the tibial plateau can be involved in a variety of fracture patterns, requiring systematic evaluation, imaging, and advanced surgical planning to address these complex injuries. Early classification systems failed to classify posterior plateau fractures; however, three-dimensional imaging and newer classification schemes, including the Quadrant System and 3D systems, have incorporated posterior column lesions. There has been a growing body of literature focused on fixation principles and plating options for posterior column fractures. Furthermore, there are multiple approaches for surgeons to choose between, including a direct posterior, posteromedial, posterolateral (including Lobenhoffer and lateral condyle osteotomy), and combined posterior approach. This article presents a guide for managing posterior tibial plateau fractures, including the initial evaluation and management, descriptions of the surgical approaches, principles of fixation, and the associated outcomes and complications.

Predictive factors for infection after osteosynthesis of tibial plateau fractures: a retrospective study of 314 patients

INTRODUCTION

The reported incidence of infection related with tibial plateau fractures (IRTPF) ranges from 2 to 23%. This complication can result in catastrophic consequences such as deformity, post-traumatic osteoarthritis, chronic pain, loss of function, and substantial economic burdens on healthcare systems due to extended hospital stays and the resources required for treatment. Consequently, it is imperative to emphasize the identification of infection risk factors.

METHODS

A retrospective case-control study was designed, encompassing patients who underwent surgery for tibial plateau fractures between 2015 and 2020. Frequencies and measures of central tendency were compared between infected patients (cases) and non-infected patients (controls) using rank-based statistical tests. Subsequently, two logistic regression models were employed to control for potential confounding variables.

RESULTS

A total of 314 patients were included, predominantly male (71.15%). Average age of 44.41 years. IRTPF were observed in 7.64% of the patients. In the univariate inferential statistical analysis, high-energy fractures (OR 6.35, p < 0.001), fractures with compartment syndrome (OR 7.10, p < 0.001), two-stage management with temporary external fixation (OR 8.18, p < 0.001), the use of 2 or more approaches in definitive surgery (OR 2.93, p = 0.011), and the use of two or more plates (OR 9.17, p < 0.001) were identified as risk factors for infection. On average, the duration of surgery in infected patients was 201.2 min, compared to 148.4 min in non-infected patients (p < 0.001). When performing two logistic regression models, the following independent risk factors were identified: high-energy fractures (OR 5.04, p = 0.012), the presence of compartment syndrome (OR 4.53, p = 0.007), and the use of two or more plates in definitive surgery (OR 5.04, p = 0.023).

CONCLUSIONS

High-energy tibial plateau fractures (Schatzker IV, V, and VI), the presence of concomitant compartment syndrome, and the use of 2 or more plates in definitive surgery are associated with a higher risk of infection related to fracture following open reduction and osteosynthesis treatment.

LEVEL OF EVIDENCE

Case-Control Study.

LEVEL III EVIDENCE

Biomechanical study of a new rim plate fixation strategy for two kinds of posterolateral depression patterns of tibial plateau fractures: a finite element analysis

PURPOSE

The biomechanical capacity of "Barrel Hoop Plate (BHP)" in the treatment of the posterolateral tibial plateau (PL) depression fractures remains unknown. In this study, two kinds of posterolateral tibial plateau depression models involving mild slope-type depression fracture (MSDF) and local sink hole-type depression fracture (LSDF) were created to test and compare the biomechanical capacities of BHP with the other two conventional fixations (Anterolateral Plate and Posterolateral Plate, ALP and PLP) by finite element analysis.

METHODS

The 3D models of three kinds of plate-screw systems and the two kinds of PL-depression models (MSDF and LSDF) were created. An axial force of 400N was applied from the distal femur to the tibial plateau. The maximal displacements of the posterolateral fractures (PLFs), the distribution on the PLFs articular surface and key points displacements were measured. Stresses in the fixation complex including the maximal Equivalent (von-Mises) Stress of implants, the max shear stress of PLFs and stiffness of the fixation were calculated.

RESULTS

The maximal displacement of MSDF was least in Group BHP. The maximal displacement of LSDF was least in Group ALP. In MSDF, BHP showed the best rim fix effect in MSDF, but unsatisfactory results in LSDF. In both MSDF and LSDF, the greatest max Equivalent Stress of the plate and the screw occurred in the PLP system. ALP and BHP showed a comparable stiffness in MSDF and ALP had the strongest stiffness in the fixation of LSDF.

CONCLUSIONS

In MSDF, the BHP has the best biomechanical capacity, especially in displacements of key points such as the PL rim, fracture line, and depression center. In LSDF, the ALP system shows the best biomechanical effect. Although the PLP has the best fixation effect on the posterior wall, it is not suitable for PL-depression fracture fixation.

Depression fractures of the posterolateral tibial plateau: Treatment by lateral femoral epicondyle osteotomy approach

OBJECTIVE

The best surgical exposure and fixation method for fractures affecting the posterolateral corner of the tibial plateau remain debatable. This study describes a surgical approach to treat lateral depressions of the posterolateral tibial plateau with or without rim involvement by osteotomy of the lateral femoral epicondyle associated with osteosynthesis with a one-third tubular horizontal belt plate to stabilize the fracture fragment.

METHOD

We evaluated 13 patients with fractures of the tibial plateau affecting the posterolateral region. Assessments included the degree of the depression (in millimeters), quality of the reduction, complications, and function.

RESULTS

All fractures and osteotomies consolidated. The patients had a mean age of 48 years and were mostly men (n=8). Regarding the quality of the reduction, the mean reduction obtained was 15.8 mm, and 8 patients achieved anatomical reduction. The mean (± standard deviation) Knee Society Score was 92±13 (range 65-100), and the mean Function Score was 95±9.6 (range 70-100). The mean Lysholm Knee Score was 92±11.7 (range 66-100), and the mean International Knee Documentation Committee Score was 85±12.6 (range 63-100). All these scores reflect good results. None of the patients developed superficial or deep infection or presented healing disorders. Sensitive or motor complications of the fibular nerve were not observed.

CONCLUSIONS

In this series of patients with depression fractures of the posterolateral tibial plateau, a surgical approach through osteotomy of the lateral femoral epicondyle allowed direct reduction and stable osteosynthesis of the fractures without functional impairment.

Rim plate in the treatment of hyperextension tibial plateau fracture: surgical technique and a series of cases

BACKGROUND

The existence of a "bare area" at the anterior plateau has been observed in cases where anteromedial and/or anterolateral proximal tibial locking plates are used for fixation in the treatment of hyperextension tibial plateau fractures (HTPF). The objective of this study is to introduce the rim plate fixation technique and evaluate its clinical efficacy.

METHODS

A retrospective analysis was conducted on HTPF patients who underwent treatment with a combination of rim plate and proximal tibial locking plate at our hospital between April 2015 and December 2019. All patients were followed up for a minimum of one year. Open reduction and internal fixation were performed using anteromedial/posteromedial and/or anterolateral approaches for all cases. The surgical strategies employed for rim plate fixation were introduced, and both radiographic and clinical outcomes were assessed.

RESULTS

Thirteen patients were enrolled in the study, with an average follow-up time of 4.3 years. Satisfactory reduction was achieved and radiographically maintained in all cases. Additionally, all patients exhibited satisfactory clinical functions, as evidenced by a mean hospital for special surgery (HSS) knee score of 96.2 ± 2.0 (range: 90-98). Furthermore, no wound complications or implant breakage were observed in this series.

CONCLUSION

The combination of the rim plate and proximal tibial plate proved to be an effective fixation configuration, resulting in satisfactory clinical outcomes.

Comparison of the results of the synthesis of Schatzker II and III tibial plateau fractures by screwing versus plate

PURPOSE

Lateral tibial plateau fractures with depression are the most common. Their treatment is currently surgical. Many therapeutic procedures have been described. Our aim is to evaluate the results of open surgery and to compare the two internal fixation methods used: lag screw versus plates.

MATERIALS AND METHODS

This is a retrospective comparative study of two series of tibial plateau fractures Schatzker types II and III treated surgically over a period of ten years with two different methods: Group A: Internal fixation using screws for 86 patients. Group B: Internal fixation using plates for 71 patients. Functional and anatomical results were assessed according to Rasmussen's clinical and radiological scores.

RESULTS

The patients' average age was 44 years (range from 18 to 76). The male gender was predominant (104 males and 53 females). Road traffic accidents were the most common aetiology with over two thirds of the cases. The fractures were type Schatzker II in 61% of the cases. The mean follow-up was five years. Although the clinical and radiological Rasmussen scores were better in group A (internal fixation with lag screws), those differences were statistically insignificant (p = 0.6 and p = 0.8). Group A clinical and radiological scores were 26.06 and 16.57, respectively and those of group B were 25.72 and 16.45. We noticed more sepsis and skin complications and a longer operating time (95 min versus 70 min) in group B patients with a statistically significant difference. None of the patients of our series had bone grafting.

CONCLUSION

For Schatzker II and III fractures, an internal fixation with lag screws would be preferable when possible especially in the case of a pure depression fracture. It yields satisfactory results with a shorter operating time and less complication rate.

Lateral tibial plateau fractures with posterior comminution. Can a rim plate offer sufficient support?

Tibial plateau fractures with posterior comminution are difficult to reduce and stabilise. Standard lateral approach doesn't offer adequate visualisation. Posterior approach is suitable for isolated posterior fractures. The addition of a specifically contoured rim plate can enable fixation of posterior fragments through a modified lateral approach.The purpose of this study was to evaluate the advantages and limitations of this novel technique. We present a prospective series of 16 tibial plateau fractures with posterolateral depression, operated over a period of 7 years (04.2014-09.2021). The mean age of the patients was 52 years .They were followed for an average period of one year.Clinical and functional assessment was performed according to the criteria of Knee Society Clinical Rating Score. The lateral and posterior component of the fracture was stabilised by a horizontal rim plate, through a posterolateral approach, with or without fibular osteotomy. 9 patients had excellent, 5 had good, 2 had average ratings. The average objective rating was 87,5 (70- 97), and the average functional rating was - 74,4 (40-100). The average ROM was 110° (100°-120°). Two of the fractures healed in 5° varus and 8° valgus respectively. One knee joint ended up with 10° flexion deficit. Three knees had medio- lateral instability, with no functional impairment. In 4 cases the K wires of the weber fibular osteotomy fixation migrated. The absence of late articular collapse of the treated fractures may be attributed to the initial stability of fixation.The addition of a rim plate addresses the posterior comminution and makes early rehabilitation safe.

Posteromedial Submeniscal Arthrotomy and Fixation with a Posteromedial Rim Plate in a Comminuted Medial Tibial Plateau Fracture

Medial tibial plateau fractures generally present as simple metaphyseal fractures; however, certain cases may present as comminuted articular fractures. Medial and posteromedial anatomical plates have traditionally been used for their management; nevertheless, not all cases can be successfully managed using these implants. We present a comminuted posteromedial Schatzker type VI tibial plateau fracture case. Direct visualization and subsequent fixation using a posteromedial rim plate were achieved through a posteromedial approach and submeniscal arthrotomy. The adequate joint reduction and the obtained stability allowed satisfactory clinical and radiological outcomes. This variation of the classic posteromedial approach and the use of a posteromedial rim plate provide an alternative when facing comminuted medial tibial plateau fractures.

Supine Posterior Hoop Plating of Bicondylar Posterior Coronal Shear Tibial Plateau Fractures Without Fibular Osteotomy

Tibial plateau posterolateral fragments, especially those associated with articular depression, are difficult to capture and support with anteriorly or lateral based implants. Applying implants to the posterior plateau has traditionally involved a prone approach or fibular osteotomy, especially when access to both the medial and lateral sides is necessary, such as a bicondylar posterior coronal shear fracture pattern. By combining two previously described techniques for posterolateral rim plating and bicondylar hoop plating, we describe a novel technique to apply a posterior bicondylar hoop implant in the supine position without fibular osteotomy for bicondylar posterior coronal shear injuries.

Anterolateral versus modified posterolateral approach for tibial plateau fractures with involvement of the posterior column: a cadaveric study

INTRODUCTION

The aim of this study was to compare the reduction quality of the anterolateral (AL) and modified posterolateral approach (PL) in lateral tibial plateau fractures involving the posterior column and central segments.

METHODS

Matched pairs of pre-fractured cadaveric tibial plateau fractures were treated by either AL approach (supine position) or PL approach (prone position). Reduction was controlled by fluoroscopy and evaluated as satisfying or unacceptable. Afterwards, the reduction was examined by 3D scan.

RESULTS

10 specimens (3 pairs 41B3.1, 2 pairs 41C3.3) were evaluated. PL approach achieved significantly (p 0.00472) better fracture reduction results (0.4 ± 0.7 mm) of the posterior column compared to the AL group (2.1 ± 1.4 mm). Fracture steps involving the central area of the lateral plateau were insufficiently reduced after fluoroscopy using both approaches.

CONCLUSION

Optimal reduction of displaced tibial plateau fractures involving the posterolateral column necessitates a posterior approach, which can be conducted in prone or lateral positioning. The anterolateral approach is indicated in fractures with minor displacement of the posterolateral rim but fracture extension in the latero-central segments. In these cases, an additional video-assisted reduction or extended approaches are helpful.

Clinical application of the modified posterolateral approach for treating posterior tibial plateau fractures

Objective: To investigate the therapeutic efficacy of the modified posterolateral approach on tibial plateau fractures. Methods: Forty-four patients with tibial plateau fractures were enrolled in the study and divided into two groups-control and observation-according to the different surgical procedures. The control group underwent fracture reduction via the conventional lateral approach, while the observation group underwent fracture reduction via the modified posterolateral strategy. The depth of tibial plateau collapse, active mobility, and the Hospital for Special Surgery (HSS) score and Lysholm score of the knee joint at 12 months after surgery were assessed in comparison to the two groups. Results: The amount of blood loss (p < 0.01), duration of surgery (p < 0.05), and depth of tibial plateau collapse (p < 0.001) were significantly less in the observation group compared with the control group. In addition, compared with the control group, the observation group exhibited significantly better knee flexion and extension function and significantly higher HSS and Lysholm scores at 12 months after surgery (p < 0.05). Conclusion: The modified posterolateral approach for posterior tibial plateau fractures has less intraoperative bleeding and a shorter operative time compared with the conventional lateral approach. It also effectively prevents postoperative tibial plateau joint surface loss and collapse, promotes the recovery of knee function, and has few postoperative complications and good clinical efficacy. Thus, the modified approach is worth promoting in clinical practice.

Lateral locking plate plus antero-posterior lag screws techniques for the management of posterolateral tibial plateau fracture: preliminary clinical results and biomechanical study

INTRODUCTION

To date, there is no consensus on the optimal surgical strategy for the treatment of posterolateral tibial plateau fracture (PLF). This study introduced a novel, simple technique for treating PLF with a lateral locking plate plus antero-posterior lag screws (LPpLS).

METHODS

We conducted a retrospective case series of 42 patients (Female/Male 19/23) with PLF treated with LPpLS between 1 July 2016 and 30 June 2019. Several pre- and postoperative outcomes were recorded, including operative time, intraoperative blood loss, CT findings, HSS, and ROM. For biomechanical studies, seventy synthetic tibiae with a simulated posterolateral split fracture were divided into seven groups. The biomechanical evaluation included displacement measurement at axial compression and fatigue testing.

RESULTS

Forty-two eligible patients were followed up for an average of 18 months (range 14-21 months). Postoperative radiographs and CT showed good positioning of plates and screws, no fracture fragment loss, and normal articular surfaces in all 42 cases. The biomechanical study showed that the axial stiffness of LPpLS was in the same fashion as the posterior buttress plate and better than the other fixation methods (P < 0.05). Additionally, the LPpLS group had a smaller displacement of fracture fragments along the X-axis (medial to lateral direction) than the BP group (P < 0.01).

CONCLUSIONS

The LPpLS technique could implement good reconstruction of the PLF, showing satisfactory therapeutic effect. The biomechanical evaluation demonstrated that the LPpLS had better stability in three-dimensional directions for PLF than other fixation strategies.

Posterolateral Fractures of the Tibial Plateau Revisited: A Simplified Treatment Algorithm

High-energy fractures of the proximal tibia with extensive fragmentation of the posterolateral (PL) quadrant of the tibial plateau are challenging to manage. Herein, we present a review of the literature on the patterns and options of approach and fixation of the PL fragment of the tibial plateau to optimize the treatment of this specific injury pattern. We searched PubMed (1980-May 2020) to identify and summarize the most relevant articles evaluating both the morphology and treatment recommendations, including the choice of approach and fixation strategy, for the PL tibial plateau fracture. We found PL fragment can present in several patterns as a pure split, split depression, contained pure depression, and noncontained depression (rim crush), which are mostly determined by the position of the knee and the force magnitude applied during the course of the accident. Based on previous concepts described by Schatzker and Kfuri, we suggest a simplified treatment algorithm highlighting the two concepts (buttressing and containment) used for plating the PL tibial plateau fragments. Based on the available current evidence, we propose an algorithm for these two morphological types of PL tibial plateau fracture. Shear-type fractures need buttressing (the "rule of thumb"), whereas noncontained peripheral rim-type fractures need peripheral repair and containment. Contained pure depression fractures are not frequent and need percutaneous-assisted elevation and subchondral rafting, either controlled by fluoroscopy or arthroscopically. It is believed that such an approach would simplify their assessment and preoperative planning and would assist the clinicians to appreciate and manage more consistently these complex injuries.

Revisiting the management of tibial plateau fractures

Three-dimensional imaging has changed the understanding and management of tibial plateau fractures. In the 1970s, Schatzker proposed a classification for tibial plateau fractures, which highlighted the morphology of the six principal types. More recently, this original classification was complimented by an extended one underscoring the importance of understanding where the split wedge fragment(s) is/are located in three dimensions. The extended classification introduced the split wedge fragment and the continuity of the rim as the determinants of joint stability and the critical role that this plays in the management of tibial plateau fractures. The current manuscript re-emphasizes contemporary concepts of tibial plateau stability and depicts key issues which must be considered when planning the definitive surgical fixation of tibial plateau fractures.

The Study of Biomechanics and Clinical Anatomy on a Novel Plate Designed for Posterolateral Tibial Plateau Fractures via Anterolateral Approach

There is no consensus about the optimal internal fixation selection for treatment of posterolateral tibial plateau fracture. This study described a novel plate through an anterolateral approach for posterolateral tibial plateau fractures (PTPFs). We evaluated the biomechanical performance of a novel plate and two conventional internal implants and investigated the anatomic feasibility of the novel plate. The fracture models were randomly assigned into six groups: Groups A–C were the model groups of posterolateral split fracture, fixed with the posterior buttress plate, the lateral locking plate, and the novel plate, respectively. Groups D–E were the model groups of posterolateral depression fracture, fixed with the posterior buttress plate, the lateral locking plate, and the novel plate, respectively. We evaluated the biomechanical performance of six model groups by the biomechanical testing and finite element analysis. Progressively increasing axial compressive loads were applied to each synthetic fracture model by using a customized indentor under 250–750 N loads. Meanwhile, we dissected 12 fresh frozen knee specimens and fixed them with the novel plate through the anterolateral approach. We recorded the adjacency of the novel plate to important anatomic structures. Biomechanical testing showed that the novel plate had the least displacement, followed by the posterior buttress plate, and the lateral plate had the most displacement in posterolateral split fracture. There was no significant difference in the displacement between the novel plate and the lateral plate at different loads in posterolateral depression fractures. And the posterior buttress plate showed the most displacement. In the finite element analysis, the maximum stress values of Groups A, B, and C were 383.76, 414.63, and 305.07 MPa under the load of 750 N, respectively. The maximum stress values of Groups D, E, and F were 474.28, 436.31, and 413.4 MPa under the load of 750 N, respectively. In the anatomic study, the placement of the novel plate had a low risk of damage to the important anatomic structures of knee posterolateral corner. The novel plate could be a great choice for the treatment of PTPFs due to better biomechanical performance and easy manipulation.

Three-column subdivision for isolated posterolateral tibial plateau fractures and perspective surgical approaches

BACKGROUND

This study aimed (1) to introduce a computed tomography (CT)-based classification of the posterolateral compartment of the tibial plateau based on the fibula and to propose the individualized surgical approaches for each zone; and (2) to determine the surgical approach based on the classification, that would achieve a safe and effective reduction and could improve postoperative clinical outcomes.

METHODS

Eighteen cases of tibia plateau fracture involving the isolated posterolateral compartment in a single institution were retrospectively analyzed. The posterolateral compartment of the tibial plateau was segmented into three zones based on the fibular position and an individualized surgical approach was proposed for each zone. In anterior Zone I, surgical treatment was performed using an extended anterolateral approach and the patient was placed in the supine position; in middle Zone II, using the transfibular approach in the supine position; in posterior Zone III, using the posteromedial approach in the prone position.

RESULTS

In all cases, anatomical articular reduction (intra-articular step off in CT images <2 mm) was achieved and maintained for the follow up period. The average mechanical medial proximal tibial angle was increased from 87.6° before surgery to 88.2° in the immediate postoperative period (P = 0.060), and maintained for the follow up period (mean 89.9° at 1-year follow up). At the 1-year follow up, the knee range of motion averaged 140° and the Lysholm knee function score was 95.0 points.

CONCLUSION

An individualized surgical approach and fixation according to three-zone subdivision for isolated posterolateral tibial plateau fractures provided an effective and safe method to treat posterolateral tibial plateau fractures.

A proposal of a new algorithm for decision-making approaches in open reduction and internal fixation of complex tibial plateau fractures - SOTA algorithm (Spanish Orthopaedic Trauma Association)

INTRODUCTION

The correct choice of surgical approaches in complex tibial plateau fractures is essential to achieve adequate reduction and fixation. Detailed fracture morphology and direction of columns displacement, that we have named the Main Deformity Direction (MDD), may aid in selecting the optimal surgical strategy. In this article we present a new algorithm based on MDD and column concepts. The aim of this study was to evaluate the outcomes of a group of tibial plateau fractures treated according to this algorithm. The secondary aim was to evaluate the incidence of the different MDD in our multicolumnar subgroup.

PATIENTS AND METHODS

Excluding isolated lateral one-column fractures, open fractures and patients not treated following this algorithm, 72 patients with tibial plateau fractures surgically treated with open reduction and internal fixation were collected retrospectively, from three trauma centers, from January 2015 to April 2019. Radiological assessment was performed to establish the columns involved and the MDD. Quality and maintenance of reduction and alignment, complications and functional outcomes were assessed.

RESULTS

Initial fracture analysis was performed in 72 patients (8 one-column, 35 two-column and 29 multicolumnar fractures). In the multicolumnar group, the posteromedial MDD was the most frequent pattern (17 of 29 patients). Four patients were excluded due to loss of follow-up, resulting 68 patients for final outcome analysis (7 one-column, 34 two-column and 27 multicolumnar). The average follow-up was 18 months (range: 6-52). Excellent/good outcomes were obtained in all one-column, 31 of 34 two-column and 25 of 27 multicolumnar fractures. Incomplete reduction was present in three patients. As complications, we had two loss of reduction, one conversion to knee arthroplasty, one nonunion and one deep infection. No patient presented neurological or vascular problems, knee instability or extension deficit.

CONCLUSION

Satisfactory results have been obtained following the principles of our algorithm. In addition to the anatomical involvement of columns and segments, we believe that identifying the Main Deformity Direction (MDD) provides useful information for decision-making, especially in multicolumnar fractures. The most frequent MDD in our multicolumnar subgroup was the posteromedial MDD, but more than one-third presented a different MDD, requiring different surgical strategies.

Solving the enigma of posterolateral tibial plateau fractures, the clue protocol

The study aim is to evaluate functional and radio- logical outcomes following a suggested protocol based on the four-column classification for management of posterolateral column tibial plateau fractures. A prospective cohort study was performed in level I academic center on 42 patients with mean age of 36 years (22-59). Eleven patients had isolated posterolateral column fractures whereas 31 patients had associated columns fractures. According to the suggested protocol, all cases of isolated posterolateral column fracture started treatment via arthroscopic evaluation of soft tissue injuries (menisci and liga- ments), arthroscopically assisted reduction and inter- nal fixation by rafting screws followed by ORIF if plating was needed. If associated with other columns fractures, columns were fixed sequentially in an anti-clockwise direction starting from anteromedial column. Average follow up was 26 months. Mean time to union was 16.3 (12-22) weeks. No radiological evidence of loss of coronal or sagittal alignment was detected at final follow up. Five patients had an average depression of 5 millimeters that did not need further intervention at this short-term follow up. Mean KOOS was 81 (72- 88). The average knee range of motion was (0° - 127°). One patient had temporary common peroneal nerve injury, one patient had deep infection and two had superficial wound infection. implementing the suggested protocol gives good to excellent radiological and functional results as regard posterolateral tibial plateau fracture. A larger study group with longer follow up is needed.

Low profile fragment specific plate fixation of lateral tibial plateau fractures - A technical note

PURPOSE

Precontoured plates used to stabilize lateral tibial plateau (LTP) fractures are limited in their ability to raft particular areas of the reconstructed articular surface. These implants also do not fit every individual's bony anatomy and can lead to soft tissue irritation. The purpose of this study was to evaluate fragment specific plate fixation of LTP fractures using generic small and mini fragment constructs.

METHODS

This was a retrospective case series of LTP fractures treated with small fragment tubular and/or mini fragment plate constructs at a single Level I trauma center. Postoperative complications were recorded. Final radiographs were analyzed to determine union and interval subsidence of the articular surface and/or loss of reduction.

RESULTS

All 19 LTP fractures healed without loss of reduction or implant failure. There was minimal interval subsidence of the LTP in all patients. There were no complications or reoperations for symptomatic implant removal within the given follow-up period.

CONCLUSION

Fragment specific fixation of LTP fractures using small and mini fragment plates creates a lower profile construct that reliably maintains fracture reduction to union.

Treatment of Isolated Posterolateral Tibial Plateau Fracture with a Horizontal Belt Plate through the Anterolateral Supra-Fibular-Head Approach

The posterolateral tibial plateau fracture was not easy to be exposed and fixed with usual techniques. The aim of this study was to investigate the biomechanical stability and clinical outcome of the isolated posterolateral tibial plateau fracture fixed with a single horizontal belt plate through the anterolateral supra-fibular-head approach. Fracture models were created by 18 synthetic tibias and fixed with three different fixation modes. Each group was fixed and tested on the loading machine, and final vertical displacement of the fragment was detected and calculated. Clinically, a retrospective analysis of 12 cases of posterolateral tibial plateau fracture from January 2013 to December 2017 was performed. There were 8 males and 4 females, aged 33-72 years, with an average age of 49.6 years. Isolated posterolateral tibial plateau fractures were identified according to preoperative X-ray and computed tomography scan. Through the modified anterolateral supra-fibular-head approach, the fracture was reduced and fixed by a prebending T-shaped distal radius plate and rafting screws, with bone substitute grafting or autogenous iliac bone implantation. Patients were followed up to a minimum one year of time period, and the outcome was evaluated clinically and radiologically. The biomechanical study shows that horizontal belt plate fixation for the isolated PL tibial plateau fracture can provide sufficient stability, allowing early knee functional exercise and partial weight bearing. For clinical case series, the average operation time in this group was 73.3 ± 10.2 mins (range: 55-90), and the average duration of hospitalization was 9.1 ± 3.3 days (range: 5-16). Patients were followed up for 12-24 months with an average of 16.5 months, and all patients achieved radiological fracture union after an average of 13.7 weeks. At one year after operation, the average knee score of the Hospital for Special Surgery (HSS) scale was 93.2 ± 4.2 points(range: 90-98), the average score of SMFA was 21.1 ± 5.6 points (range: 14-31), and the average knee range of motion (ROM) was 121.48° ± 8.88° (range: 105°-135°). There were 8 cases that were very satisfied and 3 cases that were satisfied with the operation. For an isolated posterolateral tibial plateau fracture, the supra-fibular-head approach can fully expose the fracture site; the horizontal belt plate fixation of the fracture is stable and reliable to allow for early-stage knee rehabilitation, and the outcome of medium-term clinical follow-up was satisfactory.

The concept of direct approach to lateral tibial plateau fractures and stepwise extension as needed

Malreduction after tibial plateau fractures mainly occurs due to insufficient visualization of the articular surface. In 85% of all C-type fractures an involvement of the posterolateral-central segment is observed, which is the main region of malreduction. The choice of the approach is determined (1) by the articular area which needs to be visualized and (2) the positioning of the fixation material. For simple lateral plateau fractures without involvement of the posterolateral-central segment an anterolateral standard approach in supine position with a lateral plating is the treatment of choice in most cases. For complex fractures the surgeon has to consider, that the articular surface of the lateral plateau only can be completely visualized by extended approaches in supine, lateral and prone position. Anterolateral and lateral plating can also be performed in supine, lateral and prone position. A direct fixation of the posterolateral-central segment by a plate or a screw from posterior can be only achieved in prone or lateral position, not supine. The posterolateral approach includes the use of two windows for direct visualization of the fracture. If visualization is insufficient the approach can be extended by lateral epicondylar osteotomy which allows exposure of at least 83% of the lateral articular surface. Additional central subluxation of the lateral meniscus allows to expose almost 100% of the articular surface. The concept of stepwise extension of the approach is helpful and should be individually performed as needed to achieve anatomic reduction and stable fixation of tibial plateau fractures.

Management and Outcome of a Complex Medial Tibial Plateau Fracture: A Case Report of a Rare Knee Varus Injury Variant

CASE

A 26-year-old patient who had a road traffic accident sustained a complex knee injury, which resulted in a comminuted fracture of the medial tibial plateau, along with undisplaced lateral collateral ligament (LCL) avulsion that was managed surgically with rim plating, resulting in a good outcome after 1-year follow-up.

CONCLUSION

The authors present a rare case of a combination of axial loading and varus injury to the knee, which caused splaying of the medial tibial plateau with an undisplaced LCL avulsion, managed with single rim plating, which is a relatively new method of fixation that obviated the need for 2 separate implants, with good functional outcome.

A Novel Method of the Treatment for Posterolateral Tibial Plateau Fractures

Reduction and fixation of posterolateral tibial plateau fracture via a posterolateral approach is challenging, and the posterolateral approach itself may injure the posterolateral ligament complex of the knee and can result in knee instability. We developed a new curved support plate (CSP) that can pass, via traditional anterolateral approach, through the superior tibiofibular interval and effectively support the posterolateral fragments. The purpose of our study was to determine the biomechanical reliability of the new plate and report the preliminary efficacy of the CSP for posterolateral tibial plateau fracture. In the biomechanical experiment, 40 synthetic tibias were used to create posterolateral shearing tibial fracture models, which were randomly assigned to groups A to D. Vertical displacement of the posterolateral fragments was measured under axial loads of 500 to 1,500 N. The new plate and 3.5-mm lateral locking plate exhibited similar control over fragment displacement. From June 2016 to August 2017, eight patients with posterolateral tibial plateau fracture underwent treatment with the CSP. Hospital for Special Surgery (HSS) knee score, knee flexion and extension ranges of motion, and complications were recorded to evaluate treatment effects. Eight patients (five men and three women, mean age 44 years [range, 23-66 years]) were enrolled in the study. Mean follow-up time was 13 months (range, 7-19 months). All patients achieved radiographic bone union by 3.3 months (range, 3-4 months) postoperatively. There were no complications of neurovascular injury, deep vein thrombosis, infection, and implant loosening throughout the follow-up period. At final follow-up, mean HSS score was 92.6 (88-96), with a mean knee flexion of 131.25 degrees (120-135 degrees) and a mean knee extension of 1 degree (0-5 degrees). Fixation of posterolateral tibial plateau fracture was easily and successfully achieved using our newly designed CSP, which may provide a new choice for posterolateral tibial plateau fractures.

[Application of modified anterolateral supra-fibular-head approach in treatment of tibial plateau fractures involving posterolateral column]

Objective

To explore effectiveness of reduction and internal fixation via modified anterolateral supra-fibular-head approach in treatment of tibial plateau fractures involving posterolateral column.

Methods

Between January 2016 and September 2018, 19 patients diagnosed as tibial plateau fractures involving posterolateral column were treated with reduction and internal fixation via modified anterolateral supra-fibular-head approach. There were 11 males and 8 females with an average age of 43.2 years (range, 28-65 years). The causes of tibial fracture were traffic accident (12 patients), falling injury (5 patients), and falling from height (2 patients). According to the Schatzker typing, the tibial fractures were rated as type Ⅱ in 9 cases, type Ⅲ in 4 cases, type Ⅴ in 4 cases, and type Ⅵ in 2 cases. The time from injury to operation was 5-13 days (mean, 8.5 days). There were 2 patients with osteoporosis. The operation time, intraoperative blood loss, and postoperative complications were recorded. The knee X-ray film was reviewed regularly to observe the fracture healing. At last follow-up, the fracture reductions were evaluated by Rasmussen radiological score. The knee joint function was evaluated by Hospital for Special Surgery (HSS) score system.

Results

The average operation time was 95 minutes (range, 65-130 minutes). The average intraoperative blood loss was 220 mL (range, 150-350 mL). All incisions healed by first intention. No complications such as infection or deep venous thrombosis occurred. All patients were followed up 12-20 months (mean, 15.4 months). X-ray films showed that the fractures healed with the healing time of 12-20 weeks (mean, 14.5 weeks). No complications such as loosening or breakage of internal fixation occurred. At last follow-up, according to the Rasmussen radiological score, the fracture reductions were evaluated as excellent in 13 cases, good in 4 cases, fair in 1 case, and poor in 1 case. HSS scores of knee joint function were excellent in 14 cases, good in 3 cases, fair in 1 case, and poor in 1 case. The knee joint range of motion was 90°-135°, with an average of 113.4°.

Conclusion

Application of modified anterolateral supra-fibular-head approach in reduction and internal fixation for tibial plateau fractures involving posterolateral column has the advantages of full exposure, less trauma, safety, and reliable reduction and fixation.

Arthroscopically assisted and three-dimensionally modeled minimally invasive rim plate osteosynthesis via modified anterolateral approach for posterolateral tibial plateau fractures

AIM

The aim of this study was to describe a new, closed, arthroscopically-assisted reduction of posterolateral tibial plateau fractures with minimally invasive plate osteosynthesis using a plate pre-contoured over a 3D-model based on a CT-scan of the injured tibial plateau and positioned by using a minimal anterolateral approach.

METHODS

A five to six centimeter long curvilinear incision was made over the Gerdy's tubercle. After subcutaneous dissection, the fascia was incised, the ileo-tibial band was split, and the dissection was extended posteriorly. The knee was flexed to 90° and the space between the fibular collateral ligament and the posterolateral plateau rim (para-FCL space) was created. A variable-angle locking compression plate contoured on a 3D-model was inserted flush to the tibial plateau rim. Two cortical screws were placed to ensure support under the area of depression as far posteriorly as possible. Two additional screws were implanted, and a cortical screw was used for the most anterior screw hole. The custom pre-contoured plate based on a person-specific 3D-model, associated with arthroscopy reduction, provides a supporting and containing effect to the posterolateral periarticular fragments and allows a minimally invasive plate osteosynthesis fixation to be performed. This guarantees a proper reduction and fixation without the described limitations and risks associated with the classic approaches.

CONCLUSIONS

This approach should be considered to treat fractures of the posterolateral plateau, isolated or associated with medial tibial plateau fractures, as it could improve the outcome in terms of lower associated risks, better reduction and fixation, and faster and improved patient recovery.

A new strategy to fix posterolateral depression in tibial plateau fractures: Introduction of a new modified Frosch approach and a "Barrel hoop plate" technique

AIMS

The articular congruity of tibial plateau has been stressed to be associated with the long-term function outcomes. Approach selection and fixation pattern to manipulate the posterolateral (PL)-depression of tibial plateau are both key issues which trauma surgeons should focus on. In order to provide a strong purchase of PL-depression, we developed a new modified Frosch approach and a "Barrel hoop plate" technique to provide bony reconstruction of PL-depression.

MATERIALS AND METHODS

Eleven consecutive patients of tibial plateau fractures involved in PL-depression were surgically treated at our single level-I trauma center. Our newly designed "Barrel hoop plate" was used to fix the PL-depression via a modified Frosch approach. The demography and treatment information were summarized of all the patients. X-ray and CT-scan of the knee joint were used to assess the reduction after operation. Besides evaluation of the HSS knee score, medial tibial plateau angle(mTPA), posterior slope angle(PSA) and articular step-off were measured to assess the malreduction degrees.

RESULTS

The average operation time was 123 ± 20 min. The mean blood loss was 148 ± 45 mL. The fractures were healed radiographically at 13 ± 1 weeks post-operation. After 15 ± 2 months follow-up, all the patients were pain-free with full range of motion and stable knees. Radiologically, good fracture reduction was achieved in all cases. According to the final assessment, the mTPA, m-PSA and l-PSA were 85° ± 2°, 11° ± 5° and 10° ± 6°, respectively. The average range of motion was 128° ± 10°in flexion and 4° ± 4° in extension, and the average HSS score was 91 ± 3.

CONCLUSION

Our new approach is a modification of the Frosch approach with a decreased soft tissue exposure and a low risk of neurovascular vessel injury. The concurrent application of the "Barrel hoop plate" technique could not only provide a reconstruction of the PL tibial plateau, but also hoop the ruptured tibia plateau rim and secure the depression as a raft. This new technique prevented the PL-tibial plateau reduction loss and the made the patients' early range of motion come true.

Rim plating for a rare variant of posteromedial tibial condyle fracture; partial coronal split, akin to Hoffa's fracture, associated with multi-ligament injuries and central depression

Introduction

Proximal tibia intra-articular fractures are commonly associated with ligamentous injuries and require early diagnosis and intervention. An array of fracture patterns can be encountered, and Schatzker's classification is a standard description to identify them. However, several patterns have been described that fall outside the ambits of this classification. We present a rare fracture pattern of partial posteromedial condyle coronal split associated with depression of the anterolateral plateau and mid substance tear of medial collateral ligament (MCL) and avulsions of anterior and posterior cruciate ligaments(ACL/PCL).

Case

A 45 year old male presented with swelling and severe pain in his right knee after an accident. He was diagnosed with a posteromedial tibial condyle coronal split with two fragments, along with multi-ligament injuries. He was operated with cannulated screws and a rim plate for the larger fragment. The fractures united and patient was doing well in his daily activities at final follow up of 15 months.

Conclusion

Proximal tibia fractures can present as an array of fracture patterns and require prompt diagnosis and surgical management. The one described in the present case is a rarest of rare pattern and rim plating could be a cheaper alternative to the anatomical plates.

Revisiting the Schatzker classification of tibial plateau fractures

Tibial plateau fractures have a broad spectrum of presentations, depending on the mechanism and energy of the trauma. Many classification systems are currently available to describe these injuries. In 1974, Schatzker proposed a classification based on a two-dimensional representation of the fracture. His classification with the six-principles types became one of the most utilized classification systems for tibial plateau fractures. More than four decades after this original publication, we are revisiting each fracture type in the light of information made available by computed tomography, which today comprises a standard tool in assessing articular fractures. The classification we are proposing relies on the fact that the tibial plateau has two anatomical columns, lateral and medial. We are introducing a virtual equator which splits the articular surface in the coronal plane. The equator divides each column into two quadrants, the anterior (A) and the posterior (P). Unicondylar fracture types (I to IV) have now additional modifiers A (anterior) and P (posterior) to describe the exact spatial location of the primary fracture plane. Bicondylar fracture types (V and VI) have the modifiers (A and P) of the main fracture plane for each column, and lateral (L) and medial (M) to denote the column. We are introducing the concept of the main fracture plane. Recognition of the exact location of the principal fracture plane is essential for preoperative planning of patient positioning, surgical approach and for determining where to apply the hardware to achieve stable fixation. The new three-dimensional classification is based on the template of the original Schatzker classification. It covers the mechanism of the injury, the energy of the trauma, the morphologic characteristics of the fracture and its location in three dimensions.

Tibial plateau fractures in elderly people: an institutional retrospective study

BACKGROUND

Tibial plateau fractures are the most common intra-articular fractures, which require careful evaluation and preoperative planning. The treatment of tibial plateau fractures in elderly patients is challenging, and the comprehension of epidemiology and morphology can be helpful. This study described the characteristics of geriatric tibial plateau fractures.

METHODS

A total of 327 (23.24%) patients aged ≥60 years were reviewed in our level one trauma center over a 4-year period (from January 2013 to November 2016). The following parameters were collected and evaluated: (1) demographic data, (2) injury mechanisms and (3) fracture classifications.

RESULTS

Females accounted for 60.86% in all included elderly patients. Electric-bike accidents were the cause of 32.42% of all these injuries, and 39.62% of these led to high-energy injuries. The most common type of fracture was Schatzker II (54.74%). According to the three-column classification, single lateral column fracture (28.75%) and four-quadrant fracture (involving lateral, medial, posterolateral and posteromedial fractures) (23.24%) were the two most frequent patterns. In all cases, 67.58% involved the posterior column, and the prevalence of posterolateral and posteromedial fractures were 62.69% and 37.92% respectively. Isolated posterior column fractures accounted for 12.54% of patients in total, which mostly consisted of posterolateral fracture in older females (85.37%).

CONCLUSIONS

The majority of elderly patients with tibial plateau fractures are females, and Electric-bike accidents are an important cause of injury. Geriatric tibial plateau fractures have unique distribution in classification.

A new anatomic locking plate for the treatment of posterolateral tibial plateau fractures

Background

Posterolateral tibial plateau fractures have become more common, and their treatment is of great importance to knee function. Additionally, there is no available literature detailing specialized anatomic locking plate for tibial plateau fractures. Therefore, the aim of the study was to evaluate the safety and clinical efficacy of an innovative anatomic locking plate for treatment of posterolateral tibial plateau fractures.

Methods

Between March 2014 and January 2016, 12 patients with posterolateral tibial plateau fracture underwent surgery with the anatomic locking plate for the posterolateral tibial plateau via the posterolateral approach. Relevant operational data for clinical evaluation were collected.

Results

The mean follow-up time was 26 months, and the mean age was 35 years for 12 patients. The mean interval between the time of injury and the surgery was 6.1 days. Radiological fracture union was evident in all patients at 12 weeks. During surgery, the blood loss ranged from 100 to 300 mL, and the duration ranged from 55 to 90 min. The Tegner–Lysholm functional score ranged from 85 to 97 at the final follow-up. Moreover, the final Rasmussen functional score ranged from 25 to 29, and Rasmussen anatomical score ranged from 13 to 18.

Conclusions

The newly designed anatomic locking plate for the posterolateral tibial plateau provided adequate fixation along the posterolateral tibial plateau. It proved to be safe and effective in a small-sample-size population (12 patients) during a 12- to 34-month follow-up.

A review of the management of tibial plateau fractures

Tibial plateau fractures form a wide spectrum of injuries presenting varying challenges to the trauma surgeon. The prognosis of this injury spectrum is largely dependent on the management of each particular configuration, and the literature is as a result littered with a number of management strategies with limited consensus. The aim of this review is to provide a concise guide to the trauma surgeon based on newer and classical peer-reviewed publications in international orthopaedic journals. A PubMed search was conducted to identify peer-reviewed publications within the last 10 years and expanded to identify classic papers pertaining to the Schatzker classification. The focus was on articles based on management techniques, controversies and recent developments. The management of specific injury patterns is based on the Schatzker classification which is a widely accepted traditional classification system. Whilst there is a general consensus on the ultimate goal of a stable anatomic reduction in this subset of fractures, there continues to be a number of controversies surrounding issues including pre-operative imaging, initial assessment and definitive management of specific injury patterns, some of which do not conform to the original Schatzker classification. The majority of fractures will require operative management, and with whatever management strategy employed, the main emphasis is on respecting the soft tissue envelope. There remains a paucity of prospective randomised controlled trials comparing the different available operative techniques.

A biomechanical evaluation of different fixation strategies for posterolateral fragments in tibial plateau fractures and introduction of the 'magic screw'

BACKGROUND

Posterior plate fixation is biomechanically the strongest fixation method for posterolateral column fracture (PLCF) of the tibial plateau; however, there are inherent deficiencies and risks of a posterior approach. Thus, the 'magic screw' was proposed to enhance fixation stability of the lateral rafting plate used for PLCF. The purpose of this study was to re-examine and compare the stability of different fixation methods for PLCF.

METHODS

Synthetic tibiae models were used to simulate posterolateral split fractures. The fracture models were randomly assigned into three groups: Group A, fixed with posterolateral buttress plates; Group B, with lateral locking compression plates (LCP); and Group C fixed with lateral LCPs and one 'magic screw'. Gradually increased axial compressive loads were applied to each specimen.

RESULTS

There was a mean subsidence hierarchy of the posterolateral fragment at different load levels: Group A had the least subsidence, followed by Group C, and Group B had the most. There were no significant differences in the mean loads at different displacements between Group A and Group C. Group A had the highest axial stiffness. Additionally, there was a significant difference in axial stiffness between Group B and Group C.

CONCLUSION

Biomechanical stability of the combined fixation of the posteriorly positioned lateral rafting plate with the 'magic screw' was much closer to that of posterior plate fixation for split-type PLCF. The necessity of posterior fixation through a posterior approach may be reduced for selected patients.

Reinforcement strategy for lateral rafting plate fixation in posterolateral column fractures of the tibial plateau: The magic screw technique

BACKGROUND

A posterolateral column fracture of the tibial plateau (PLCF) is not uncommon, especially lateral and bicondylar tibial plateau fractures. Currently, there is no consensus on the methods of surgical treatment for PLCF, including the surgical approach or the fixation strategy. Though various posterior approaches have been explored and can allow posterior buttress plate fixation, the necessity of a posterior approach with fixation for PLCFs is increasingly questioned. Meanwhile, there is no literature to analyse the morphological features of PLCFs. None of the available surgical techniques can solve all of the problems of PLCFs.

METHODS

From February 2016 to June 2016, an inconsecutive series of 16 patients who suffered Schatzker type II tibial plateau fractures involving the posterolateral column were selected based on an analysis of the morphological characteristics of PLCFs. The patients were all treated by lateral rafting plate fixation with magic screw implantation through the extended lateral approach.

RESULTS

According to PLCF morphology, 4 patients had mild slope-type depression fractures (MSDF) of the articular surface, and the other 12 patients had block-type splitting fractures (BSF). After a 12-month follow-up period, there were no complications related to the fixation technique and no significant changes in limb alignment. At the final follow-up, the average range of motion (ROM) of the affected knees was 2.3°-125°, and the average HSS score was 94.2.

CONCLUSIONS

The selected patients who suffered Schatzker type II fractures involving the posterolateral column could be successfully treated via lateral rafting plate fixation with the magic screw technique. For PLCF treatment, magic screw fixation is a valuable technique that may reduce the utilization of posterior approaches and posterior fixations.