Anatomical evaluation of the modified posterolateral approach for posterolateral tibial plateau fracture

Functional Outcomes of Posterior Plate Fixation in Complex Tibial Plateau Fractures: A Retrospective Study

Aim The research aimed to assess the functional and radiological results of posterior plate fixation in complex types of posterior tibial plateau fractures (PTPFs) with special regard to the stability of the region, healing of the fractures, and the patient's functioning several years after surgery. Materials and methods An exhaustive study of the concerned group of patients was done on 30 individuals who underwent posterior plate fixation for closed PTPFs at the Department of Orthopaedics and Traumatology, Peerless Hospital and B.K. Roy Research Centre, Kolkata, India, from September 2018 to March 2021. A thorough clinical and radiological follow-up was carried out for every patient at set periods of time, before and after the operation. After a thorough study, key outcome metrics were measured, such as duration of fracture union, articular congruity, Knee Society Scores (KSS), International Knee Documentation Committee (IKDC) scores, range of motion (ROM) of the knee, and complications. Results The study included 30 participants, with a mean age of 40.70 ± 8.46 years. These included 25 males and 5 females. All fractures showed radiological union after a mean of 16.2 ± 3.1 weeks. Excellent articular congruity (≤2 mm step-off) was achieved in 29 (96.6%) cases. The mean clinical and functional KSS was 85.60 ± 7.09 and 81.23 ± 6.09, respectively; the mean IKDC score was 70.83 ± 6.92. Mean knee flexion achieved was 122.60° ± 8.08°, and all patients achieved independent ambulation at a mean of 18.1 ± 2.6 weeks. Complications managed conservatively included superficial infection in three (10%) patients and knee stiffness in four (13.3%) patients. Conclusion Posterior plate fixation has proven to be simple and effective, achieving excellent radiological and functional outcomes. Patients were able to gain early movement and independent walking by the final follow-up, with all patients having stable fixation. The technique was reliable, with low complication rates and no implant failures or nonunion, and was an effective surgical treatment for complex PTPFs.

Fibular head osteotomy: A new technique for better exposure of postero-lateral tibial plateau fracture

OBJECTIVE

Various osteotomy techniques have been explored for exposing the posterolateral tibial plateau in previous studies. However, these methods are often complex, cause significant damage to normal anatomical structures, compromise knee joint stability, and pose risks to knee function, thus limiting their clinical application. This study proposes a new fibular head osteotomy technique for treating posterolateral tibial plateau fractures, aiming to achieve favorable surgical outcomes.

METHODS

Thirteen patients who underwent surgical treatment for posterolateral tibial plateau fractures between March 2020 and August 2023 at our hospital were included in this study. The study was approved by the clinical ethics committee of our institution. All patients provided informed consent before participation. Surgeries were performed through a modified Frosch approach combined with partial fibular head osteotomy, while preserving part of the biceps femoris tendon attachment to the fibula. Postoperative fracture reduction quality was assessed using X-rays and computed tomography (CT) scans, in accordance with the Rasmussen radiology scoring system. Knee joint function was evaluated at the final follow-up using the Hospital for Special Surgery (HSS) scoring system. The healing of the fibular head osteotomy site and the presence of any complications were also assessed.

RESULTS

All 13 patients were followed up with for an average of 12.2 months (range: 9-17 months). All fractures, collapse, and deformities were corrected. The mean Rasmussen radiological score was 15.5 ± 2.5 (range: 10-18), with four cases rated as excellent, eight as good, and one as fair. The mean Hospital for Special Surgery (HSS) score was 89.8 ± 6.4 (range: 78-98), with 10 cases rated as excellent and 3 as good. No posterolateral knee instability was observed during physical examination at the final follow-up. There were no complications such as surgical site infection or common peroneal nerve injury.

CONCLUSIONS

Partial fibular head osteotomy combined with preservation of the biceps femoris tendon attachment is an effective technique for treating posterolateral tibial plateau fractures. This method allows for successful fracture reduction and fixation without compromising knee joint function.

Clinical Analysis of the Frosch Approach in the Treatment of Posterolateral Tibial Plateau Fractures Combined with Lateral Tibial Plateau Fractures

OBJECTIVE

The treatment of posterolateral tibial plateau fractures is difficult, and providing sufficient exposure and effective fixation is a challenge. There is great controversy regarding the surgical approach for posterolateral tibial plateau fractures. The purpose of the study was to investigate the clinical effects of open reduction and internal fixation using the Frosch approach for the treatment of posterolateral tibial plateau fractures combined with lateral tibial plateau fractures.

METHODS

Data from 19 patients with posterolateral tibial plateau fractures combined with lateral tibial plateau fractures treated from May 2018 to January 2022 were retrospectively analyzed. There were nine men and 10 women, ranging in age from 22 to 62 years, with an average age of 45.6 years. All patients were treated using the Frosch approach. Under direct vision, the posterolateral and lateral fractures were reduced, and full bone grafting was performed. We reshaped the oblique "T" shaped plate for the distal radius and placed it on the posterolateral tibial plateau to fix the posterolateral fractures. The lateral inverted "L" shaped locking plate was placed on the lateral tibial plateau to fix the lateral tibial plateau fractures. Within 2 weeks after the operation, the patients were instructed to perform knee joint function exercises within 90°. At the last follow-up, the Rasmussen radiological criteria were used to evaluate the effectiveness of fracture reduction and fixation. And the knee joint function was evaluated using Rasmussen functional score.

RESULTS

The operation time ranged from 100 to 180 min, with an average of 134.2 min; intraoperative blood loss ranged from 20 to 150 mL, with an average of 66.8 mL. The follow-up duration ranged from 14 to 58 months, with an average of 36.2 months. There were no complications, such as vascular or nerve injury or incision infection. Fracture healing was achieved in all patients, and the healing time ranged from 10 to 14 weeks, with an average of 11.2 weeks. During the follow-up period, there was no loosening or breakage of the internal fixation, varus or valgus deformity of the knee joint, re-collapse of the articular surface, or instability of the knee joint. At the last follow-up, the effectiveness of fracture reduction and fixation was excellent in 13 patients and good in six patients. And the knee joint function was excellent in 17 patients and good in two patients.

CONCLUSION

The Frosch approach for open reduction and internal fixation in the treatment of posterolateral tibial plateau fractures combined with lateral tibial plateau fractures has a definite clinical benefit and is worthy of promotion and application.

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.

Feasibility of the modified inverted L-shaped approach for posterolateral tibial plateau fracture: A retrospective study

Approaches for treating posterolateral tibial plateau fractures vary among surgeons, and the inverted L-shaped approach is a known option. This article aims to introduce a new modified posterolateral inverted L-shaped approach for isolated posterolateral tibial plateau fractures and study its feasibility. Medical records of patients with posterolateral tibial plateau fractures were reviewed. Plain radiographs were obtained during the follow-up period, and the hospital for special surgery (HSS) score was used to assess the function of the injured limb. Perioperative complications were recorded and followed-up. In total, 32 patients with posterolateral tibial plateau fractures were treated using a modified posterolateral approach. The mean age of the patients was 44 ± 11 years (28-64 years). All patients successfully underwent surgery and were followed-up for a mean duration of 13 ± 2 months (10-16 months). On plain radiographs, fracture lines were fuzzy 3 months after surgery and disappeared 12 months after surgery. No perioperative complications occurred during the follow-up period. The HSS score was evaluated 12 months after surgery, and the mean score was 91 ± 5 points (81-97 points), including 25 excellent cases and 7 good cases. The modified posterolateral inverted L-shaped approach has the advantages of small soft tissue dissection, fracture reduction under direct vision, easy internal fixation, and a lower risk of neurovascular injury. This approach is feasible for the treatment of isolated posterolateral tibial plateau fractures, and further high-quality randomized control trials are required to confirm its clinical efficacy.

Anterior Tibial Artery and Its Clinical Importance in the Posterolateral Approach to the Tibial Plateau: An Angiographic Study on 219 Lower Limbs

The anterior tibial artery (ATA) is the most critical anatomical structure at risk at the distal border of the posterolateral approach to the tibial plateau. This study aimed to use available lower extremity digital subtraction angiography (DSA) images to determine the distal safe limit of this approach by measuring the distance from the tibial joint line to the ATA where it pierces the interosseous membrane. Tibial plateau mediolateral width (TP-ML-W) and the perpendicular distances from the ATA to the tibial joint line and fibular head were measured on DSA images in 219 lower extremities. To normalize the distances according to the tibial dimensions, each distance was divided by the TP-ML-W, and a ratio was obtained. Popliteal artery branching pattern was categorized according to the classification proposed by Kim et al. Comparative analysis between right and left extremities, genders, and anatomical variations were performed. There were 102 male and 26 female subjects with a mean age of 60.7 ± 15.7 years (range, 17-92 years). Ninety-one subjects had bilateral lower extremity DSA; thus, a total of 219 extremities were analyzed. The TP-ML-W was wider in male (78.3 ± 7.0) than female (70.5 ± 7.3) subjects (p = 0.001). The ATA coursed through the interosseous membrane at 50.9 ± 6.9 mm (range, 37.4-70.2 mm) distal to the tibial plateau joint line, and it was 66.5 ± 7.2% of the TP-ML-W. The ATA coursed through the interosseous membrane at 36.5 ± 6.0 mm (range, 21.9-53.8 mm) distal to the fibular head, and it was 47.7 ± 6.6% of the TP-ML-W. All measured variables were similar between the regular branching pattern of the popliteal artery (type 1A) and other observed variations among male subjects. The safe length of dissection in the posterolateral approach is average 66.5% (range, 45.7-86.7%) of the TP-ML-W. This ratio is valid for both genders. The use of a ratio instead of a distance, which is subject to personal variations, seems to be more logical and practical for planning this surgery, but the wide range should still not be ignored.

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.

Biomechanical analysis of "Barrel hoop plate" technique for the posterolateral fragments of tibial plateau fractures with different displacement tendency

OBJECTIVES

The purpose of our study is to evaluate the three-dimensional biomechanical properties of "Barrel Hoop plate" in two kinds of artificial posterolateral tibial plateau fracture fragment (PLF) by using of synthetic models, each of which has an initial amplifying displacement tendency.

MATERIAL AND METHODS

Thirty-six tibiae models were randomly assigned into two groups with different displacement tendencies: posterior displacement (PD) and lateral displacement (LD). Each model was then fixed with three patterns: Anterolateral plate (AP), Posterolateral plate (PP), and "Barrel Hoop plate" (BHP). Displacement in three axes of vertical, sagittal and horizontal axis was captured by Optotrak Certus motion analysis system. Bluehill 2 software was used for load control and data collection.

RESULTS

In Model-PD, when the load was over 1000 N, the posterior displacement of Group-PP and Group-BHP were less than Group-AP (P<0.01). The inferior displacement in the vertical axis of Group-PP was larger than both Group-AP and Group-BHP in all the loading set (P<0.01). In Model-LD, both of the lateral displacement in Group-AP and Group-BHP was less than that of Group-PP when the load was over 1000 N (P<0.01). The inferior displacement of Group-AP was less than that of Group-PP in the load of 1500 N (P<0.01). Both of the posterior displacement of Group-AP and Group-BHP was less than that of Group-PP when the loading was 1500 N (P<0.01). The stiffness of Group PP was less than that of Group AP (P<0.01).

CONCLUSIONS

The results demonstrated that the 2.7 mm "Barrel Hoop plate" had a greater capacity of anti-three-dimension axes displacement of PLF. The 3.5 mm Anterolateral plate had the advantage in anti-lateral displacement and anti-inferior displacement but was weak at anti-posterior displacement of PLF. The 2.7 mm Posterolateral plate was stronger in anti-posterior, however, weak in anti-inferior displacement capacity.

[Posterior popliteal fossa S-shaped incision with double-window approach in treating posterior column of tibial plateau fractures]

OBJECTIVE

To evaluate the effectiveness and safty of posterior popliteal fossa S-shaped incision with double-window approach for the treatment of posterior column of tibial plateau fractures.

METHODS

A retrospective analysis was made on the clinical data of 13 patients with complex tibial plateau fractures involving both posteromedial and posterolateral columns between May 2015 and July 2017. There were 9 males and 4 females, aged 33-64 years (mean, 46.5 years). The causes of injury included traffic accident in 5 cases, falling from height in 2 cases, falling from electric bicycle in 4 cases, and falling because of skiing in 2 cases. The preoperative range of motion of the affected knees was (35.1±9.2)°. The time from injury to surgery was 7-19 days (mean, 13.3 days). All patients underwent a posterior popliteal fossa S-shaped incision through the window of medial heads of gastrocnemius muscle (medial window) and the window between medial and lateral head of gastrocnemius muscle (popliteal fossa window) approaches. After a good visual control of fracture reduction, both posteromedial and posterolateral columns of tibial plateau fractures were fixed with buttress plate respectively. Bone union, limb alignment, articular surface, and range of motion were estimated after operation. The American Hospital for Special Surgery (HSS) score was used to evaluate functional outcomes of knees.

RESULTS

After operation, 1 patient had fat liquefaction and dehiscence of incision, which healed after expanding the wound; the other patients' incisions healed by first intention, and no vascular or nerve injury occurred during operation. All the 13 patients were followed up 12-18 months (mean, 16 months). The X-ray films showed that all patients obtained good fracture unions, the fracture healing time was 14-22 weeks (mean, 18 weeks). At 12 months after operation, the articular surface was smooth without collapse, and the knee range of motion was (109.5±13.6)°, showing significant difference when compared with preoperative value ( t=18.879, P=0.000). No complication of infection, re-displacement of fracture, or secondary varus/valgus deformity was observed during follow-up. The HSS score was 82-96 (mean, 89.6) at 12 months after operation, with the result of excellent in 10 cases and good in 3 cases.

CONCLUSION

The posterior column fracture of tibial plateau involving both posteromedial and posterolateral columns treated by double-window approach through posterior popliteal fossa S-shaped incision is safe and effective, with satisfactory results and good recovery of knee joint function.

Effects of surgical approaches and morphological characteristics on the follow up outcomes of patients with posterolateral tibial plateau fractures

This study aimed to study the effects of surgical approaches and identify the morphological characteristics associated with the 1-year follow-up outcome of patients with posterolateral tibial plateau fractures after successful surgery.We followed 200 postoperative patients for 1 year. The modified Hospital for Special Knee Surgery score (HSS score) was used to evaluate the functional recovery of the knee. We supposed 4 morphological characteristics in CT images acting as possible risk factors, including the anteroposterior diameters of posterolateral broken bone fragments (fragment-diameter), the damage to the posterolateral cortex of the tibial head (cortex-damage), the combinational fracture of the proximal fibula (fibula-fracture) or fracture of the medial tibial condyle (medial-condyle-fracture). Multivariate regression models were used to analyze the effect of these factors on the HSS score after adjusting the 2 surgical approaches and other confounders.The average HSS score was 85.1 ± 5.8 for all the patients. We treated 155 patients with the anterolateral approach and 45 patients with the posterolateral approach. The surgical approach, fragment-diameter, fibula-fracture, and medial-condyle-fracture were correlated with the HSS scores (P < .05). After adjusting for the above factors, the Schatzker type, age and gender, compared with anterolateral approach, the posterolateral approach could improve the HSS scores by an average of 3.7 points. The fragment-diameter <20 mm and posterolateral approach interacted on the HSS scores. Comparing posterolateral and anterolateral approaches, we found that the HSS scores of patients with fragment-diameter <20 mm increased by 6.1 points (95% CI: 4.1-8.2) in the posterolateral approach, while those with fragment-diameter ≥20 mm did not significantly improve the HSS scores.The surgical approach, fragment-diameter, fibula-fracture, and medial-condyle-fracture were independent risk factors associated with the follow-up outcome of patients with posterolateral tibial plateau fractures after successful surgery. The posterolateral approach could significantly improve the HSS score in the studied hospital.

Arthroscopic-assisted inflatable bone tamp reduction for treatment of posterolateral tibial plateau fractures

AIM

Our study aimed to assess the safety and efficacy of an innovative arthroscopic-assisted inflatable tamp reduction technique for the treatment of posterolateral tibial plateau fractures.

PATIENTS AND METHODS

Twenty-six patients with posterolateral tibial plateau fractures were treated with arthroscopy through inflation reduction technique were enrolled. Arthroscopy was used to observe the reduction of articular surface to avoid over-reduction or de-reduction. An arthroscopic assessment of anatomic joint reduction completed the procedure. Inflatable bone tamp was used to reduce the fractures and calcium phosphate cement was used as bone substitute to augment the repairs.

RESULTS

Under arthroscopy, the reduction was observed to be excellent without any residual deformity in all the cases. Cement overflow into the soft tissues or the knee joint was not observed. During the follow-up period, no obvious articular surface subsidence (>5 mm) was observed and no evidence of posttraumatic osteoarthritis could be detected. Radiographs under full weight bearing revealed neither loss of reduction nor any valgus deviation. Three months after surgery, the graft was almost completely replaced by new bone. The functional evaluation following the Rasmussen score yielded excellent results.

CONCLUSIONS

This study provided a novel technique for the reduction of depressed and split-depressed pasterolateral tibial plateau fractures. Arthroscopic-assisted inflatable bone tamp reduction is an effective method for the treatment of posterolateral tibial plateau fractures.

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.

[Clinical observation of 3.5 mm T support plate fixation for simple posterolateral tibial plateau fracture by posterolateral inverted L-shaped approach]

Objective

To summarize the effectiveness of 3.5 mm T support plate fixation for simple postero-lateral tibial plateau fractures by posterolateral inverted L-shaped approach.

Methods

Between March 2011 and January 2016, 13 patients with simple posterolateral tibial plateau fracture were treated with 3.5 mm T support plate fixation by posterolateral inverted L-shaped approach. Of 13 cases, 6 were male and 7 were female, aged 28 to 52 years (mean, 43 years). The left side was involved in 5 cases and the right side in 8 cases. The causes of injury were traffic accidents in 6 cases, falls in 3 cases, and falling from height in 4 cases. All of patients had fresh closed fracture by X-ray, CT three dimensional reconstruction, and MRI. According to Schatzker classification, 4 cases were rated as type II and 9 cases as type III. The time between injury and operation was 5-9 days (mean, 7 days).

Results

One case had incision skin necrosis, which was cured after debridement and skin grafting; and primary healing was obtained in the other cases. The patients were followed up 10-16 months (mean, 13 months). The X-ray film showed that the fracture line was blurred at 3 months after operation, and disappeared at 12 months after operation. There was no complications of wound infection, major neurovascular injury, loosening or breakage of internal fixation, and dislocation of joint surface. The Hospital for Special Surgery (HSS) knee function score was 94 (range, 89-97) at last follow-up; all were excellent.

Conclusion

The 3.5 mm T support plate fixation by posterolateral inverted L-shaped approach is one of preferred surgical method for the treatment of simple posterolateral tibial plateau fractures.

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.

Rim Plate Augmentation of the Posterolateral Bare Area of the Tibial Plateau Using a 3.5-mm Precontoured Locking Compression Plate: A Cadaveric Study

OBJECTIVE

To evaluate the effectiveness of an additional rim plate [3.5-mm precontoured locking compression plate (LCP)] for stabilizing the posterolateral fragment in lateral tibial plateau fractures.

METHODS

Standard lateral locking plates [either a proximal tibial plate (PTP) or a proximal tibial locking plate (PTLP)] were applied to 40 matched pair knees from 20 fresh-frozen cadavers followed by the application of a secondary rim plate [variable angle LCP (VALCP)] posterior laterally.

RESULTS

The mean ratio of supported articular surface in the PTP group was 0.692, whereas that in the PTLP group was 0.569. This difference was statistically significant (P < 0.001). Additional rim plating with a VALCP could only be performed for 27 of 40 knees; 8 of 20 knees in the PTP group and 5 of 20 knees in the PTLP group could not be fitted with a VALCP due to anatomic limitations. For the total standard plating group alone, the mean ratio of supported articular surface was 0.596, whereas the mean ratio of supported articular surface with additional rim plating was 0.798 (P < 0.001). In contrast, additional rim plating was possible for more knees that received a PTLP than a PTP. Ultimately, there was no significant difference in the ratio of supported articular surface after additional rim plating between the 2 different types of standard plates (P = 0.087).

CONCLUSION

Our results identified a bare area in the posterolateral corner of the lateral plateau that was unsupported by rafting screws following conventional, 3.5-mm, precontoured LCP plating. Thus, additional rim plating may be useful for treating plateau fractures with a posterolateral fragment.

Posterolateral tibial plateau fractures, how to buttress? Reversed L posteromedial or the posterolateral approach: a comparative cadaveric study

INTRODUCTION

The selection of a surgical approach for buttressing posterolateral tibial plateau fractures is controversial.

OBJECTIVE

This study compared the surgical exposure area between the reversed L posteromedial approach (R-PM) and the posterolateral (PL) approach using the lateral plateau width as a metric.

MATERIALS AND METHODS

Twenty lower extremities from fresh frozen cadavers were included. The R-PM approach was used first and the boundary of the posterior tibial cortex exposure was marked with metal pins. With the same specimens, the PL approach was then performed and the exposure area was marked. After removing all soft tissue, an imaginary line was drawn from the lateral plateau rim anterior to the fibular head (L) to the posteromedial ridge of the tibia (M). Additional metal pins were used to indicate bony reference landmarks at the joint line on the posterior tibial plateau, including the lateral tibial spine (S), the lateral boundary with the PM approach (_LPM) and the lateral boundary with the PL approach (_LPL). All distances were measured using S as the reference point.

RESULTS

The average distance from S to L, referred to as the lateral plateau width (A), was 32.62 mm. The average distances from S to _LPM (B) and from S to _LPL measured as a percentage of A were 43.72 and 81.41%, respectively. The average R-PM approach blind distance from _LPM to _LPL (C) as a percentage of the lateral plateau width was 58.45%, while the distance _LPL to L (D), which represents the invisible blind distance with both approaches, was 15.37% of that width.

CONCLUSIONS

The PL approach provides better access for buttressing the posterolateral tibial plateau fracture than the R-PM approach. With the R-PM approach, the blind area on the lateral plateau which can be accessed only by the PL approach starts approximately at 43.72% and ends at 81.41% of the lateral tibial plateau width. When a fracture is located in this zone, the posterolateral approach is recommended.

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.

The anatomical relationship of the neurovascular structures in direct posterior lateral gastrocnemius split approach for posterolateral tibial plateau fractures

PURPOSE

To evaluate the distances between the incision and neurovascular structures in direct posterior split-gastrocnemius approach for tibial plateau fractures.

METHODS

Thirteen fresh-frozen cadavers were used in the study. The distance between the neurovascular structures medial and lateral to the incision was measured from the tibial joint line and at a level 5 cm distal to the joint line.

RESULTS

The mean distance between the incision and medial neurovascular structures was 10.09 ± 3.47 mm (range 5.63-16.51 mm) at the level of the tibial joint line and 10.39 ± 2.57 mm (range 5.79-14.09 mm) at a level 5 cm distal to the joint line. The mean distance between the incision and the common peroneal nerve was 13.44 ± 4.17 mm (range 6.28-20.72 mm) at the level of the tibial joint line and 19.56 ± 5.24 mm (range 12.58-26.74 mm) at a level 5 cm distal to the joint line.

CONCLUSIONS

In isolated posterolateral tibial plateau fractures, it is possible to apply anatomical reduction and buttress plating on the posterior surface with a direct posterior split-gastrocnemius approach. With a thorough understanding of the regional anatomy, this approach can be safely performed by experienced orthopaedists.

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

Posterolateral fracture fragments in tibial plateau fractures have proven to be particularly difficult to reduce and adequately repair internally through anterior or anterolateral approaches, although they are safer. Posterior and posterolateral approaches offer a direct approach for the reduction and fixation of plates, but they have several limitations. Here, we have proposed a modified anterolateral approach, which ensures a safe and effective technique for the reduction and fixation of posterolateral fracture fragments, aided by our innovative rim plate.

A revised 3-column classification approach for the surgical planning of extended lateral tibial plateau fractures

OBJECTIVES

Variable angle locking compression plates allow for lateral buttress and support of the posterolateral joint surface of tibial plateau fractures. This gives room for improvement of the surgical 3-column classification approach. Our aim was to revise and validate the 3-column classification approach to better guide the surgical planning of tibial plateau fractures extending into the posterolateral corner.

METHODS

In contrast to the 3-column classification approach, in the revised approach the posterior border of the lateral column in the revised approach lies posterior instead of anterior of the fibula. According to the revised 3-column classification approach, extended lateral column fractures are defined as single lateral column fractures extending posteriorly into the posterolateral corner. CT-images of 36 patients were reviewed and classified twice online according to Schatzker and revised 3-column classification approach by five observers. The intraobserver reliability was calculated using the Cohen's kappa and the interobserver reliability was calculated using the Fleiss' kappa.

RESULTS

The intraobserver reliability showed substantial agreement according to Landis and Koch for both Schatzker and the revised 3-column classification approach (0.746 vs. 0.782 p = 0.37, Schatzker vs. revised 3-column, respectively). However, the interobserver reliability of the revised 3-column classification approach was significantly higher as compared to the Schatzker classification (0.531 vs. 0.669 p < 0.01, moderate vs. substantial agreement, Schatzker vs. revised 3-column, respectively).

CONCLUSIONS

With the introduction of variable angle locking compression plates, the revised 3-column classification approach is a very helpful tool in the preoperative surgical planning of tibial plateau fractures, in particular, lateral column fractures that extend into the posterolateral corner. The revised 3-column classification approach is rather a practical supplement to the Schatzker classification. It has a significantly higher interobserver reliability as compared to the Schatzker classification, most likely due to the more simple nature of the revised 3-column classification approach.

Results of a modified posterolateral approach for the isolated posterolateral tibial plateau fracture

BACKGROUND

There are few posterolateral approaches that do not require the common peroneal nerve (CPN) dissection. With the nerve exposure, it would pose a great challenge and sometimes iatrogenic damage over the surgical course. The purpose was to present a case series of patients with posterolateral tibial plateau fractures treated by direct exposure and plate fixation through a modified posterolateral approach without exposing the common peroneal nerve (CPN).

MATERIALS AND METHODS

9 consecutive cases of isolated posterior fractures of the posterolateral tibial plateau were operated by open reduction and plate fixation through the modified posterolateral approach without exposing the CPN between June 2009 and January 2012. Articular reduction quality was assessment according to the immediate postoperative radiographs. At 24 month followup, all patients had radiographs and were asked to complete a validated outcome measure and the modified Hospital for Special Surgery (HSS) Knee Scale.

RESULTS

All patients were followedup, with a mean period of 29 months (range 25-40 months). Bony union was achieved in all patients. In six cases, the reduction was graded as best and in three cases the reduction was graded as middle according to the immediate postoperative radiographs by the rank order system. The average range of motion arc was 127° (range 110°-134°) and the mean postoperative HSS was 93 (range 85-97) at 24 months followup. None of the patients sustained neurovascular complication.

CONCLUSIONS

The modified posterolateral approach through a long skin incision without exposing the CPN could help to expand the surgical options for an optimal treatment of this kind of fracture, and plating of posterolateral tibial plateau fractures would result in restoration and maintenance of alignment. This approach demands precise knowledge of the anatomic structures of this region.

A combined posterior reversed L-shaped and anterolateral approach for two column tibial plateau fractures in Caucasians: A technical note

OBJECTIVE

Open reduction and internal fixation of two column posterior and lateral tibial plateau fractures through a combined posterior reversed L-shaped and anterolateral approach in floating position in Caucasians.

INDICATIONS

Two column posterior and lateral tibial plateau fractures.

CONTRAINDICATIONS

Tibial plateau fractures that do not involve the posterior and lateral column.

SURGICAL TECHNIQUE

The patient is positioned in floating position, a reversed L-shaped skin incision is made, the posterior column after lateral retraction of the medial head of the gastrocnemius muscle is exposed, and the posterior fragments are reduced and fixed. Subsequently, flexion and varus stress on the knee is applied, an anterolateral skin incision is made, the lateral column is exposed, and the lateral fragments are reduced and fixed.

CONCLUSION

Despite a different physique as Asians, a combined posterior reversed L-shaped and anterolateral approach in a floating position for the surgical treatment of two column posterior and lateral tibial plateau fractures is technically possible in Caucasians. In our experience, this combined approach is an excellent strategy in most patients for surgical treatment of two column posterior and lateral column fractures.

The distinct prediction standards for radiological assessments associated with soft tissue injuries in the acute tibial plateau fracture

The goal of this study was to assess the incidence of soft tissue injury in the tibial plateau fracture by magnetic resonance image (MRI) and reveal the relationship between the articular widening/depression and the risk of meniscus and ligament disorder. A total of 54 patients with tibial plateau fracture were indicated for operative intervention. Soft tissue injuries were assessed by MRI. Meniscus, anterior/posterior cruciate ligaments and medial/lateral collateral ligaments injuries on MRI were evaluated. The articular widening/depression was measured in picture archiving and communication systems. Schatzker classification of fracture types was not significantly associated with soft tissue injuries. The rates of soft tissue injury in types IV and II (respectively, 85.7 and 74.1 %) were higher than those in other types. The meniscus injury was the most common soft tissue damage, and the incidence of meniscus injury was 55.6 %. When LPDCT and LPWCT were, respectively, about 7.6 mm and 10.1 mm and LPDX-ray and LPWX-ray, respectively, 5.6 and 7.4 mm, more attention should be paid on the collateral and cruciate ligament injuries in types I, II and III. Furthermore, when LPWCT and LPWX-ray were, respectively, about 10.3 and 8.6 mm, the collateral and cruciate ligaments were susceptible to injury in types IV and V. In conclusion, tibial plateau fracture can occur high morbidity of soft tissue injury, including meniscus and ligament disorder. X-ray and CT scan had different predicting standards for soft tissue injury, and the articular widening/depression in the tibial plateau was associated with meniscus and ligament injuries.

Combined approaches for fixation of Schatzker type II tibial plateau fractures involving the posterolateral column: a prospective observational cohort study

INTRODUCTION

This study aimed to investigate the surgical techniques and the clinical efficacy of combined approaches for the treatment of Schatzker type II tibial plateau fractures involving the posterolateral column [lateral and posterolateral columns (LPCs) fractures] in a prospective cohort.

MATERIALS AND METHODS

From January 2007 through December 2010, a total of 65 patients with LPCs underwent dual-plate fixation via a combined anterior and posterior approach. The anterior and posterior approaches were the conventional anterolateral approach and a posteromedial inverted L-shaped approach, respectively, with the patients in a floating position.

RESULTS

Ultimately, 41 patients were followed up for a mean period of 52.5 months. All fractures healed. The mean time to radiographic bony union was 15.2 weeks and the mean time to full weight-bearing was 18.7 weeks. No parameter associated with knee alignment changed significantly between immediately postoperation and 2 years postoperation. No collapse of the reduced articular surface was detected. Two years postoperation, the mean Hospital for Special Surgery score was 92.3; the mean Short Form-36 score was 90.1, and the mean range of knee motion was 1.7°-123.6° (extension-flexion). Two patients suffered dehiscence of the anterolateral incision and another suffered partial necrosis at the margin of the posteromedial incision postoperatively. All healed in response conservative treatment. Another two patients experienced numbness in the posteromedial inferior region of the calf. No implant loosening, breakage, fixation failure, or other complication was observed during follow-up.

CONCLUSIONS

LPCs are not uncommon. Careful preoperative analysis of computed tomography images and impeccable preparation are necessary to avoid neglecting a posterolateral column fracture. It is inappropriate to generalize one scenario for all Schatzker type II fractures: a single approach cannot address all subtypes of these fractures. Dual-plate fixation via a combined approach is an effective treatment for LPCs.

Multi-plate reconstruction for severe bicondylar tibial plateau fractures of young adults

PURPOSE

This study was to evaluate clinical outcomes and complications following multi-plate reconstruction for treating severe bicondylar tibial plateau fractures of young adults.

METHODS

Between September 2007 and February 2012, 26 patients with severe bicondylar tibial plateau fractures met inclusion criteria; they were treated using multi-plate technique through combined approaches. Patients received an average follow-up of 40.8 (range, 18-64) months, which included anteroposterior and lateral imaging, postoperative complications, range of motion and stability of the knee. The Rasmussen score was applied for functional and radiological evaluation.

RESULTS

Three to five plates were used for reconstruction. No intra-operative complications occurred. Postoperative complications included bulge of hardware in four patients and superficial dehiscence in three cases in the anterolateral incision of which one developed to deep infection. There was no neurovascular damage, and no implant breakage or loosening. Hardware was removed partly or totally in 16 cases. The average Rasmussen score at final follow-up was 27.2 (range, 21-30) points for functional evaluation and 16.4 (range, 14-18) for radiology.

CONCLUSIONS

Multi-plate reconstruction is a valid and safe method for treating severe bicondylar tibial plateau fractures of young adults.