scholarly journals A Prospective, Randomized Investigation of Syndesmosis Injury Fixation

2020 ◽  
Vol 5 (2) ◽  
pp. 2473011420S0000
Author(s):  
Eric Giza ◽  
Todd Oliver ◽  
Patrick S. Barousse ◽  
Tyler Allen ◽  
Trevor Shelton ◽  
...  
Keyword(s):  
Adverse Events ◽  
Clinical Outcomes ◽  
Screw Fixation ◽  
Syndesmotic Injury ◽  
Short Term ◽  
Suture Button ◽  
Syndesmotic Screw ◽  
Fixation Group ◽  
Significant Difference ◽  
Vas Scores

Category: Ankle; Trauma Introduction/Purpose: Syndesmotic disruption occurs in 10 to 13% of all ankle fractures. It is present in 15 cases per 100,000 of the general population. There has been debate on the best treatment for syndesmotic injuries. The typical surgical treatments include fixation with either screws or suture button devices. The purpose of this study is to compare clinical outcomes of syndesmotic injuries treated surgically with either screws or suture button devices. It was hypothesized that suture button fixation would provide equal clinical results with less need for hardware removal. Methods: This was a multi-center, randomized, prospective clinical trial comparing two surgical interventions for treatment of acute syndesmotic injury. Subjects were placed into either screw fixation or the Suture-button device group. Subjects with clinical signs or radiographic evidence of syndesmotic injury were asked to participate in this study. Inclusion criteria was ages 18 to 65 years old with confirmed syndesmotic instability. The primary outcomes of the study were VAS scores (activity, pain, satisfaction) and FFI scores (pain, disability, activity) which were collected at preoperative state, 6 weeks, and 12 months postoperatively. Results: Sixty-five subjects were enrolled in this study. Thirty-two subjects received Suture-button fixation (49%) and 33 received screw fixation (51%). VAS scores and FFI scores for subjects treated with the Suture-button device or screw fixation comparing preoperative, six-week, and 12-month scores all showed clinical improvement. There was no significant difference between the two treatment groups (p >0.05).Nine subjects (27%) in the syndesmotic screw fixation group experienced adverse events, and only one subject (3%) in the suture-button group had adverse event. Conclusion: The short-term clinical outcomes suggest that both syndesmotic screws and suture-button devices are effective treatment options to address acute syndesmotic injuries. In the short-term (12-months), suture-button fixation resulted in significantly less adverse events compared to syndesmotic screw fixation group.

scholarly journals A Prospective, Randomized Suture-button vs Screw Syndesmotic Fixation

2019 ◽  
Vol 4 (4) ◽  
pp. 2473011419S0018
Author(s):  
Eric Giza ◽  
Todd Oliver ◽  
Christopher Kreulen ◽  
Ashoke Sathy ◽  
Wade Faerber ◽  
...  
Keyword(s):  
Adverse Events ◽  
Clinical Outcomes ◽  
Screw Fixation ◽  
Hardware Removal ◽  
Syndesmotic Injury ◽  
Short Term ◽  
Suture Button ◽  
Syndesmotic Screw ◽  
Fixation Group ◽  
Vas Scores

Category: Ankle, Arthroscopy, Sports Introduction/Purpose: Syndesmotic disruption occurs in 10 to 13% of all ankle fractures. It is present in 15 cases per 100,000 of the general population. There has been debate on the best treatment for syndesmotic injuries. The typical surgical treatments include fixation with either screws or suture button devices. The purpose of this study is to compare clinical outcomes of syndesmotic injuries treated surgically with either screws or suture button devices. It was hypothesized that suture button fixation would provide equal clinical results with less need for hardware removal. Methods: This was a multi-center, randomized, prospective clinical trial comparing two surgical interventions for treatment of acute syndesmotic injury. At the time of surgical intervention, subjects were placed into either the screw fixation or the Suture-button device group by opening a randomized envelope in the operating room. Subjects with clinical signs or radiographic evidence of syndesmotic injury were asked to participate in this study. Inclusion criteria was ages 18 to 65 years old with confirmed syndesmotic instability. The primary outcomes of thestudy were VAS scores (activity, pain, satisfaction) and FFI scores (pain, disability, activity) which were collected at preoperative state, 6 weeks, and 12 months postoperatively. Results: Sixty-five subjects were enrolled in this study. Thirty-two subjects received Suture-button fixation (49%) and 33 received screw fixation (51%). VAS scores and FFI scores for subjects treated with the Suture-button device or screw fixation comparing preoperative, six-week, and 12-month scores all showed clinical improvement. There was no significant difference between the two treatment groups (p >0.05). Nine subjects (27%) in the syndesmotic screw fixation group experienced adverse events; four required repeat surgery for symptomatic syndesmotic screw removal, one for revision fixation, and four did not return to surgery despite hardware failure. One subject(3%) in the suture-button group required hardware removal. Conclusion: The short-term clinical outcomes suggest that both syndesmotic screws and suture-button devices are effective treatment options to address acute syndesmotic injuries. In the short-term (12-months), suture-button fixation resulted in significantly less adverse events compared to syndesmotic screw fixation group.

Evaluation of Reduction Accuracy of Suture-Button and Screw Fixation Techniques for Syndesmotic Injuries

2016 ◽  
Vol 37 (12) ◽  
pp. 1317-1325 ◽  
Author(s):  
Onur Kocadal ◽  
Mehmet Yucel ◽  
Murad Pepe ◽  
Ertugrul Aksahin ◽  
Cem Nuri Aktekin
Keyword(s):  
Screw Fixation ◽  
Ct Scans ◽  
Functional Evaluation ◽  
Level Of Evidence ◽  
Cross Sectional ◽  
Suture Button ◽  
Fixation Group ◽  
Significant Difference ◽  
The Mean

Background: Among the most important predictors of functional results of treatment of syndesmotic injuries is the accurate restoration of the syndesmotic space. The purpose of this study was to investigate the reduction performance of screw fixation and suture-button techniques using images obtained from computed tomography (CT) scans. Methods: Patients at or below 65 years who were treated with screw or suture-button fixation for syndesmotic injuries accompanying ankle fractures between January 2012 and March 2015 were retrospectively reviewed in our regional trauma unit. A total of 52 patients were included in the present study. Fixation was performed with syndesmotic screws in 26 patients and suture-button fixation in 26 patients. The patients were divided into 2 groups according to the fixation methods. Postoperative CT scans were used for radiologic evaluation. Four parameters (anteroposterior reduction, rotational reduction, the cross-sectional syndesmotic area, and the distal tibiofibular volumes) were taken into consideration for the radiologic assessment. Functional evaluation of patients was done using the American Orthopaedic Foot & Ankle Society (AOFAS) ankle-hindfoot scale at the final follow-up. The mean follow-up period was 16.7 ± 11.0 months, and the mean age was 44.1 ± 13.2. Results: There was a statistically significant decrease in the degree of fibular rotation ( P = .03) and an increase in the upper syndesmotic area ( P = .006) compared with the contralateral limb in the screw fixation group. In the suture-button fixation group, there was a statistically significant increase in the lower syndesmotic area ( P = .02) and distal tibiofibular volumes ( P = .04) compared with the contralateral limbs. The mean AOFAS scores were 88.4 ± 9.2 and 86.1 ± 14.0 in the suture-button fixation and screw fixation group, respectively. There was no statistically significant difference in the functional ankle joint scores between the groups. Conclusion: Although the functional outcomes were similar, the restoration of the fibular rotation in the treatment of syndesmotic injuries by screw fixation was troublesome and the volume of the distal tibiofibular space increased with the suture-button fixation technique. Level of Evidence: Level III, retrospective comparative study.

scholarly journals Suture Button versus Syndesmotic Screw for Syndesmotic Injuries

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0044
Author(s):  
Yoshiharu Shimozono ◽  
Eoghan Hurley ◽  
John Kennedy
Keyword(s):  
Clinical Studies ◽  
Screw Fixation ◽  
Meta Analysis ◽  
Implant Removal ◽  
Implant Failure ◽  
Athletic Injury ◽  
P Value ◽  
Suture Button ◽  
Syndesmotic Screw ◽  
Significant Difference

Category: Trauma Introduction/Purpose: Syndesmotic injuries are a common athletic injury and involved in approximately 13% of ankle fractures. Screw fixation (SS) has been the most common fixation treatment for syndesmotic injury, however syndesmosis malreduction has been reported to occur up to more than 50% in syndesmotic screw fixation. Recently, suture-button fixation (SB) technique has been developed to restore anatomic function of the syndesmosis, with potential advantages of allowing physiological movement of syndesmosis, anatomic healing, avoidance of implant removal and earlier rehabilitation. However, optimal surgical treatment is still controversial to date. The purpose of this study was to compare the clinical outcomes of SB and SS fixation techniques for syndesmotic injuries with a meta-analysis of the clinical studies comparing SB and SS fixation for syndesmosis injuries. Methods: The literature search was performed according to the PRISMA guidelines to identify cohort studies comparing SB and SS fixation for syndesmosis injuries. The level of evidence (LOE) was assessed based on the criteria by the Oxford-Centre for Evidence Based Medicine. Statistical analysis was performed using RevMan, and a p-value of < 0.05 was considered to be statistically significant. Results: Ten clinical studies were identified comparing 222 patients with SB to 235 patients with SS fixation. Patients treated with SB had a higher postoperative AOFAS score at a mean of 17.2 months (90.9 vs 87.3, p = 0.002). SB resulted in a lower rate of implant failure (0.0% vs 27.1%, p < 0.0001), implant removal failure (4.0% vs 37.5%, p < 0.0001), and joint malreduction (0.8% vs 10.7%, p = 0.009). However, there was no significant difference in the rate of other complications with SB (4.2% vs 8.6%, p = 0.21). Conclusion: SB fixation results in improved functional outcomes, lower rates of implant failure, and joint malreduction. Based on the findings of this meta-analysis SB appears to be favorable to SS for treating syndesmotic injuries.

scholarly journals Comparison of Time-dependent Changes in Syndesmotic Reduction Between Suture-button and Screw Fixation for Ankle Malleolar Fractures with Tibiofibular Diastasis

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0029
Author(s):  
Seiji Kimura ◽  
Satoshi Yamaguchi
Keyword(s):  
Fracture Fixation ◽  
Screw Fixation ◽  
Time Dependent ◽  
Fixation Method ◽  
Suture Button ◽  
Malleolar Fractures ◽  
Fixation Group ◽  
Postoperative Changes ◽  
Group B ◽  
Over Time

Category: Trauma Introduction/Purpose: Reduction of the tibiofibular syndesmosis is one of the most important factors that affect the clinical outcome after ankle malleolar fractures with syndesmotic diastasis. Recent studies have shown that suture-button fixation can yield better syndesmotic reduction than screw fixation immediately after surgery. However, the time-dependent change in the reduction for each fixation method has not been well studied. The purpose of this study was to compare the postoperative changes in the syndesmotic reduction after surgical treatment of ankle malleolar fractures between suture-button fixation and screw fixation using bilateral computed tomography. Methods: Patients who sustained ankle malleolar fractures with tibiofibular diastasis and underwent tibiofibular fixation were included. Suture-button fixation (Group B; n=14; age, 39 years) was used between 2015 and 2016, and syndesmotic screw fixation (Group S; n=20; age, 35 years) was used between 2012 and 2014. The syndesmotic screws were routinely removed. Patients underwent CT scanning of the bilateral ankles at 2 time points: at 2 weeks and 1 year after fracture fixation. Side-to-side differences in the anterior and posterior tibiofibular distances, and anteroposterior fibular translation were measured. Syndesmotic melreduction was defined as a side-to-side difference?2 mm in either of the measurements. The changes in each measurement and incidence of malreduction for each group were assessed using the Wilcoxon signed-ranks test and McNemar’s test. Differences between the two groups at each time point were also compared. Results: At 2 weeks after fracture fixation, the side-to-side difference in anterior tibiofibular distance was significantly wider in Group B (1.9 mm) than in Group S (0.7 mm) (p=0.03). Additionally, the fibulas were more translated posteriorly in Group B (1.5 mm) than in Group S (0.2 mm). At 1 year, the anterior tibiofibular distance decreased to 0.8 mm in Group B (p=0.09). On the contrary, it significantly increased to 1.9 mm in Group S (p=0.002). In Group B, the incidences of malreduction were 4/14 and 2/14 at 2 weeks and 1 year, respectively (p=0.74). Two ankles, which were malreduced at 2 weeks, changed to a reduced syndesmosis at 1 year. In Group S, the incidences were 8/20 and 9/20 at 2 weeks and 1 year, respectively (p=0.35). Conclusion: Syndesmotic alignment changed over time in both fixation methods, however, the patterns of change were different. Using suture-button fixation, the anterior tibiofibular distance decreased over time. As a result, the widened syndesmoses at 2 weeks changed to reduced syndesmoses at 1 year. On the contrary, using tibiofibular screw fixation, the anterior tibiofibular distance widened after screw removal. Our result suggests that the flexible suture-button fixation allows the fibula to move to the optimal location over time.

scholarly journals Restoration of Tibiofibular Kinematics with a Tricortical Screw or Suture Button Fixation After Syndesmotic Ankle Injuries

2017 ◽  
Vol 2 (3) ◽  
pp. 2473011417S0000
Author(s):  
Conor Murphy ◽  
Thomas Pfeiffer ◽  
Jason Zlotnicki ◽  
Volker Musahl ◽  
Richard Debski ◽  
...  
Keyword(s):  
Screw Fixation ◽  
External Rotation ◽  
Tracking System ◽  
Optical Tracking ◽  
Ankle Injuries ◽  
Suture Button ◽  
Tibiofibular Ligament ◽  
Cortical Screw ◽  
Significant Difference ◽  
Posterior Translation

Category: Ankle, Sports, Trauma Introduction/Purpose: Anterior inferior tibiofibular ligament (AITFL), Posterior inferior tibiofibular ligament (PITFL) and Interosseous membrane (IOM) disruption is a predictive measure of residual symptoms after ankle injury. In unstable injuries, the syndesmosis is treated operatively with cortical screw fixation or a suture button apparatus. Biomechanical analyses of suture button versus cortical screw fixation methods show contradicting results regarding suture button integrity and maintenance of fixation. The objective of this study is to quantify tibiofibular joint motion in syndesmotic screw and suture button fixation models compared to the intact ankle. Methods: Five fresh-frozen human cadaveric specimens (mean age 58 yrs.; range 38-73 yrs.) were tested using a 6-degree-of- freedom robotic testing system. The tibia and calcaneus were rigidly fixed to the robotic manipulator and the subtalar joint was fused. The full fibular length was maintained and fibular motion was unconstrained. Fibular motion with respect to the tibia was tracked by a 3D optical tracking system. A 5 Nm external rotation moment and 5 Nm inversion moment were applied to the ankle at 0°, 15°, and 30° plantarflexion and 10° dorsiflexion. Outcome variables included fibular medial-lateral (ML) translation, anterior-posterior (AP) translation, and external rotation (ER) in the following states: 1) intact ankle, 2) AITFL transected, 3) PITFL and IOM transected, 4) 3.5 mm cannulated tricortical screw fixation, 5) suture button fixation. An ANOVA with a post-hoc Tukey analysis was performed for statistical analysis (*p<0.05). Results: Significant differences in fibular motion were only during the inversion moment. Fibular posterior translation was significantly higher with complete syndesmosis injury compared to the intact ankle at 0°, 15°, and 30° plantarflexion and the tricortical screw at 15° and 30°. Significantly higher fibular posterior translation was observed with the suture button compared to the intact ankle at 15° and 30 plantarflexion and to the tricortical screw at 15°. ER was significantly increased with complete injury compared to the tricortical screw at 0° and 30° plantarflexion. The suture button demonstrated significantly greater ER at 0° plantarflexion and 10° dorsiflexion compared to the intact ankle. The only significant difference in ML translation exists between the tricortical screw and complete injury at 30° plantarflexion. Conclusion: The suture button did not restore physiologic motion of the syndesmosis. It only restored fibular ML translation. Significant differences in AP translation and ER persisted compared to the intact ankle. The tricortical screw restored fibular motion in all planes. No significant differences were observed compared to the intact ankle. These findings are consistent with previous studies. This study utilized a novel setup to measure unconstrained motion in a full length, intact fibula. Physicians should evaluate AP translation and ER as critical fibular motions when reconstructing the syndesmosis with suture button fixation.

scholarly journals Comparison of percutaneous cross screw fixation versus open reduction and internal fixation for pelvic Day type II crescent fracture-dislocation: case-control study

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Guangheng Xiang ◽  
Xiaoyu Dong ◽  
Xingan Jiang ◽  
Leyi Cai ◽  
Jianshun Wang ◽  
...  
Keyword(s):  
Internal Fixation ◽  
Clinical Outcomes ◽  
Open Reduction ◽  
Patient Characteristics ◽  
Fracture Dislocation ◽  
Surgical Trauma ◽  
Type Ii ◽  
Fixation Group ◽  
Significant Difference ◽  
Minimally Invasive Fixation

Abstract Objective To investigate the clinical outcomes of percutaneous cross screws internal fixation for pelvic Day type II crescent fracture-dislocation. Methods We reviewed 66 consecutive patients undergoing surgical treatment for Day type II crescent fracture-dislocation from June 2005 to December 2017. Percutaneous cross screws internal fixation was performed in 40 patients, and open reduction and internal fixation was performed in 26 patients. The patient characteristics, surgical complications, radiographic and clinical outcomes and were compared. Results There was no statistically difference on the mean time from injury to surgery between the two groups. The time of operation, the amount of blood loss, the length of incision, and the hospital stay were significantly shorter in the percutaneous cross screws internal fixation group. No significant difference on Matta scores and Majeed scores between the two groups. The open reduction and internal fixation group resulted in a higher rate of intraoperative hemorrhage, nerve injury, discomfort, and pain. Conclusion Percutaneous cross screws internal fixation for Day II type pelvic crescent fracture-dislocation was safe and effective. Minimally invasive fixation had the advantages of short operation and hospitalization time, less intraoperative bleeding, and surgical trauma.

Aminophylline for treatment of postdural puncture headache

Neurology ◽  
2018 ◽  
Vol 90 (17) ◽  
pp. e1523-e1529 ◽  
Author(s):  
Chuanjie Wu ◽  
Dongsheng Guan ◽  
Ming Ren ◽  
Zhengfei Ma ◽  
Changming Wan ◽  
...  
Keyword(s):  
Adverse Events ◽  
Early Stage ◽  
Standing Position ◽  
Postdural Puncture Headache ◽  
Intention To Treat ◽  
Headache Severity ◽  
Patient Global Impression ◽  
Significant Difference ◽  
Vas Scores ◽  
Global Impression Of Change

ObjectiveTo investigate the efficacy and safety of IV aminophylline for patients with postdural puncture headache (PDPH).MethodsWe randomly assigned patients to groups receiving either 250 mg IV aminophylline or a placebo within 3 hours of symptom onset once daily for 2 consecutive days. The primary endpoint was headache severity 8 hours after treatment. We assessed this using visual analog scale (VAS) scores taken from patients in a standing position. We also recorded posttreatment VAS score changes, Patient Global Impression of Change (PGIC) scores, and adverse events. We performed an intention-to-treat analysis.ResultsWe enrolled 126 patients with PDPH at 5 centers in China (62 assigned to the aminophylline group and 64 to the placebo group). The median age was 37 years, and 96 (76.2%) patients were women. Compared to the placebo-treated patients, the aminophylline-treated patients had significantly lower mean VAS scores 8 hours after treatment (5.34 vs 2.98, p < 0.001) and were significantly more likely to report improvements on the PGIC (39.1% vs 72.6%, p < 0.01). This therapeutic effect was already evident at the 30-minute time point and persisted for 2 days. There was no significant difference in the incidence of adverse events (4.8% vs 1.6%, p = 0.589).ConclusionsIV aminophylline is an effective and safe early-stage treatment for patients with PDPH.ClinicalTrials.gov identifierNCT02522013.Classification of evidenceThis study provides Class I evidence that for people with PDPH, IV aminophylline reduces headache severity.

scholarly journals Platelet-rich plasma versus hyaluronic acid in the treatment of knee osteoarthritis: a meta-analysis

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Jia Zhu Tang ◽  
Ming Jun Nie ◽  
Jian Zhong Zhao ◽  
Guang Cheng Zhang ◽  
Qing Zhang ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Adverse Events ◽  
Knee Osteoarthritis ◽  
Platelet Rich Plasma ◽  
Meta Analysis ◽  
Womac Pain ◽  
Significant Difference ◽  
Vas Scores ◽  
Eq Vas

Abstract Background This study aimed to evaluate the clinical efficacy of platelet-rich plasma (PRP) injection compared with hyaluronic acid (HA) injection for patients undergoing knee osteoarthritis. Methods We systematically searched electronic databases including PubMed, Embase, Web of Science, and the Cochrane Library on January 23, 2020 to identify relevant studies issued in English languages. The outcomes evaluating the efficacy of knee osteoarthritis (KOA) treatment were Western Ontario and McMaster Universities Arthritis Index (WOMAC) scores (WOMAC pain, function, stiffness, and total scores) at 1, 3, 6, and 12 months; International Knee Documentation Committee (IKDC) scores, Lequesne Index score, Visual Analog Scale (VAS) scores, EQ-VAS scores, and KOOS scores. The pooled data were analyzed by Stata 12.0. Results A total of 20 RCTs were enrolled in the present meta-analysis. The pooled results demonstrated that platelet-rich plasma (PRP) injection reduced pain more effectively than hyaluronic acid (HA) injection at 6-month and 12-month follow-up evaluated by WOMAC pain scores and VAS scores. EQ-VAS in the patients treated with PRP injection was lower than that in patients with HA injection at 12 months. Moreover, the patients with PRP injection had a better function recovery than those with HA injection at 1-month, 3-month, 6-month, and 12-month follow-up, as evaluated by WOMAC function scores. WOMAC total scores showed significant difference at 6-month and 12-month follow-up. The IKDC scores indicated PRP injection was significantly more effective than HA injection at 3 months and 6 months. However, the Lequesne Index scores, KOOS scores, and adverse events did not show any significant difference between groups. Conclusion Intra-articular PRP injection appeared to be more efficacious than HA injection for the treatment of KOA in terms of short-term functional recovery. Moreover, PRP injection was superior to HA injection in terms of long-term pain relief and function improvement. In addition, PRP injection did not increase the risk of adverse events compared to HA injection.

scholarly journals Hybrid Fixation Restores Tibiofibular Kinematics for Early Weightbearing after Syndesmotic Injury

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0009
Author(s):  
Neel Patel ◽  
Calvin Chan ◽  
Conor Murphy ◽  
Richard Debski ◽  
Volker Musahl ◽  
...  
Keyword(s):  
Screw Fixation ◽  
External Rotation ◽  
Syndesmotic Injury ◽  
Hybrid Fixation ◽  
Fixation Methods ◽  
Suture Button ◽  
Tibiofibular Ligament ◽  
Lateral Translation ◽  
Posterior Translation ◽  
Single Suture

Category: Ankle Introduction/Purpose: Injury to the anterior inferior tibiofibular ligament (AITFL), posterior inferior tibiofibular ligament (PITFL), and interosseous membrane (IOM) of the syndesmosis is a predictive measure of residual symptoms after an ankle injury. Unstable syndesmotic injuries are typically treated surgically with constructs consisting of cortical screw and/or suture button fixation. Previous studies have shown contradicting findings regarding the effects of different surgical fixation methods on tibiofibular kinematics. Thus, the objective of this study was to quantify tibiofibular joint motion with different syndesmotic screw and suture button fixation constructs after disruption of the syndesmosis compared to the intact ankle during simulated weight bearing. Methods: Five fresh-frozen human cadaveric specimens were tested using a six degree-of-freedom robotic testing system. After subtalar joint fusion, the tibia and calcaneus were rigidly fixed to a robotic manipulator, while complete fibular length was maintained and fibular motion was unconstrained. A constant 200 N compressive load was applied to the ankle while an additional 5 Nm external rotation and 5 Nm inversion moment applied independently to the ankle at 0°, 15°, and 30° plantarflexion and 10° dorsiflexion. Fibular motion with respect to the tibia was tracked using an optical tracking system. Outcome variables included fibular medial-lateral (ML) translation, anterior-posterior (AP) translation, and external rotation (ER) in the following states: intact ankle, complete injury (AITFL, PITFL, and IOM transected), single tricortical screw fixation double tricortical screw fixation, hybrid fixation (single tricortical screw and single suture button), suture button fixation, and divergent suture button fixation. Repeated measures ANOVA was performed for statistical analysis. Results: The external rotation moment produced significant differences in fibular motion between the injury and fixation states compared to the intact state. A complete syndesmotic injury caused significantly increased fibular lateral translation, posterior translation, and external rotation in all ankle positions except 30° plantarflexion compared to the intact ankle. Single suture button and single screw fixation resulted in significantly higher fibular lateral translation at 10° dorsiflexion compared the intact ankle, while single suture button fixation also resulted in significantly higher external rotation at 10° dorsiflexion compared the intact ankle. Fibular posterior translation was significantly higher with hybrid, suture button, and divergent suture button fixation at 0° flexion and with single tricortical screw and double screw fixation at 10° dorsiflexion compared to the intact ankle (Figure 1). Conclusion: Complete injury to the syndesmosis results in significantly higher fibular lateral translation, external rotation, and posterior translation compared to the intact ankle. Hybrid or divergent suture button fixation would be recommended to restore tibiofibular motion without over-constraint. However, none of the fixation methods were able to restore AP translation in all ankle positions. Thus, it is important to evaluate syndesmotic stability in the sagittal plane at different ankle positions. Findings of this study suggest that physicians should evaluate fibular AP translation in a neutral position when using suture button fixation constructs and in dorsiflexion when using tricortical screw fixation constructs.

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