All-Inside Anterior Cruciate Ligament Reconstruction.

Anterior cruciate ligament (ACL) reconstruction is one of the most commonly performed knee operations. An "all-inside" technique creates bone sockets for ACL graft passage, as opposed to more traditional full bone tunnels, and typically incorporates suspensory fixation instead of screw fixation to secure the graft. This technique may be indicated for any ACL reconstruction surgery, where adequate bone stock exists to drill sockets and to use cortical fixation. The technique may be used with all soft tissue, as well as bone plug ACL grafts and autograft hamstring or quadriceps tendon; most allograft tendon options may be performed with an all-inside technique. Advantages include anatomic tunnel/socket placement, decreased postoperative pain and swelling, minimal hardware, appropriate graft tensioning and retensioning, and circumferential graft to bone healing. Tips for successful all-inside surgery include matching graft diameter to socket diameter, drilling appropriate length sockets based on individual graft length, so as not to "bottom out" the graft and confirming cortical button fixation intraoperatively. Potential complications include graft-socket mismatch, full-tunnel reaming, and loss of cortical fixation. Multiple studies have shown the all-inside technique to have similar or superior biomechanical properties and clinical outcomes compared to the more traditional full-tunnel ACL reconstruction techniques.

Distal biceps tendon repair: cost analysis of single- versus double-incision techniques in an ambulatory surgery center.

Background: The purpose of this study was to compare the cost differences for single- versus double-incision distal biceps repair at an ambulatory surgery center (ASC) given that similar clinical outcomes have been reported between these methods. Methods: A retrospective review of financial and medical records was completed for patients who underwent distal biceps tendon repair over a three-year period at a single private orthopedic practice. Variables analyzed include the cost to the ASC of operative time and the cost of differential surgical supplies, specifically implants and disposable supplies. Results: A total of 10 surgeons performed 104 repairs. Nine surgeons performed repairs through a single incision with use of cortical button or suture anchor fixation, and one surgeon performed transosseous suture fixation through a double-incision approach. The median tourniquet time and procedure length were 31 (interquartile range [IQR] 27-40) and 44 (IQR 39-54) minutes for single-incision repairs and 68 minutes (IQR 61-75) and 110 minutes (IQR 103-113) for double-incision repairs which were significantly different across groups (P < .001, P < .001). The total surgical cost (operative time, implants, and disposables) for single-incision repairs was a median of $758 (IQR 732-803) compared with $606 (IQR 567-629) for double-incision repairs (P < .001). However, the procedure cost with implants (not including disposables) was not significantly different for single- (median [Mdn] = $500 [IQR 475-552]) and double-incision repairs (Mdn $552 [IQR 514-564]) (P = .14) although the procedure cost with disposables (not including implant costs) favored single-incision repairs (Mdn = $478 [IQR 452-523]) over double-incision repairs (Mdn = $606 [IQR 567-629]) (P < .001). Conclusion: In a single surgery center, single-incision distal biceps repairs utilizing an implant were performed more expeditiously than double-incision repairs with a transosseous technique but incurred greater surgical costs. Differences in surgical time cost between the two approaches could be consequential for ASCs and other stakeholders.

Is Intraoperative Fluoroscopy Necessary to Confirm Device Position for Femoral-Sided Cortical Suspensory Fixation during Anterior Cruciate Ligament Reconstruction?

Increased laxity within the graft construct system can lead to graft failure after anterior cruciate ligament (ACL) reconstruction. Suboptimal cortical device positioning could lead to increased laxity within the system, which could influence the mechanics and function of the graft reconstruction. This study evaluates the benefit of intraoperative fluoroscopy to confirm device position on the femur during ACL reconstruction using cortical suspensory fixation. One hundred consecutive patients who underwent soft tissue ACL reconstruction using a suspensory cortical device for femoral fixation were retrospectively evaluated. Patients were split into two groups: Group A utilized anteromedial portal visualization and had intraoperative fluoroscopic imaging performed at the time of ACL graft fixation to confirm femoral device placement on the lateral femoral metaphyseal cortex. Group B utilized anteromedial portal visualization alone. Both groups had radiographic X-rays performed at the first postoperative visit to evaluate device location and all images were independently evaluated by three fellowship trained orthopaedic surgeons. Device position was classified as optimal if there was complete apposition of the entire device against the femoral cortex and suboptimal if it was > 2 mm off the cortex. Fisher's exact test, analysis of variance, and 95% confidence intervals were calculated to compare the groups for statistical significance. The results showed 0/60 (0%) patients in group A had suboptimal device position at postoperative follow-up, while 4/40 (10%) patients in group B had suboptimal device position (p = 0.013). There were no graft failures in group A and one graft failure in group B. There was a significant difference in cortical device position in patients who had intraoperative fluoroscopic imaging versus patients who had no intraoperative imaging. The use of confirmatory intraoperative imaging may be beneficial to confirm appropriate device location when using a femoral cortical suspensory fixation technique for ACL reconstruction.

Open Reduction Internal Fixation of a Traumatic Osteochondral Lesion of the Patella With Bioabsorbable Screw Fixation.

Osteochondral injuries of the patella occur often in the setting of traumatic patellar dislocations. Early fixation of the displaced fragment(s) is paramount to maintaining the viability of the articular cartilage and the congruency of the patella. Multiple fixation techniques have been described to ensure stable fixation, including wires, screws, and all-suture techniques with both absorbable and nonabsorbable materials. We performed an open reduction and internal fixation of a large traumatic patellar osteochondral lesion using 3 bioabsorbable compression screws. The technique is straightforward and provides compression across the fragments, affording excellent stability, which allows early range of motion and ambulation.

A Biomechanical Analysis of Interference Screw Versus Bone Tunnel Fixation of Flexor Hallucis Longus Tendon Transfers to the Calcaneus.

The flexor hallucis longus tendon transfer is commonly used to restore function in chronic Achilles tendon ruptures and chronic Achilles tendinopathy. The tendon is often secured to the calcaneus either through a bone tunnel or by an interference screw. We hypothesized that tenodesis using the bone tunnel method would be mechanically superior to interference screw fixation for flexor hallucis longus transfers. Eight matched pairs of cadaveric specimens were assigned randomly to the bone tunnel or interference screw technique and were loaded to failure. Biomechanical analysis was performed to evaluate the ultimate strength, peak stress, Young's modulus, failure strain, and strain energy. Unpaired comparison, paired comparison, and linear regression analyses were used to determine statistical significance. A slight 22% ± 9% decrease in Young's modulus and a 52% ± 18% increase of strain energy were found in the interference screw group. However, no differences in ultimate strength, peak stress, or failure strain were seen between the 2 groups on paired comparison. Our findings suggest that interference screw fixation provides similar spontaneous biomechanical properties to the use of a bone tunnel for flexor hallucis longus transfer to the calcaneus. The interference screw is a practical option for fixation of the flexor hallucis longus tendon to the calcaneus and can be performed through a single incision approach.

Cam lesion femoral osteoplasty: in vitro biomechanical evaluation of iatrogenic femoral cortical notching and risk of neck fracture.

PURPOSE: To investigate the effect of femoral cortical notching at different depths on the peak compressive load and energy required to cause a femoral neck fracture in composite femurs. METHODS: Thirty fourth-generation composite femurs were divided into 5 groups: (1) intact with an inherent alpha angle of 61°, (2) resection of inherent cam lesion by reducing the alpha angle from 61° to 45°, (3) cam resection and cortical notching of a 5.5-mm spherical diameter by 2.00-mm (grade I) depth, (4) cam resection with cortical notching of 4.00-mm (grade II) depth, and (5) cam resection with cortical notching of 6.00-mm (grade III) depth. The specimens were loaded in the position of midstance during gait and tested until failure using a dynamic tensile testing machine at a rate of 6 mm/min. RESULTS: Grade II and grade III cortical notching depths with cam resections resulted in a significant decrease in the ultimate load to failure and energy (P < .05) compared with the intact state. The grade II and grade III cortical notching groups with cam resection failed at a significantly lower ultimate load and with significantly lower energy when compared with the cam resection group alone. CONCLUSIONS: The findings of this study demonstrated significant decreases in ultimate load and energy to failure between the intact group and the grade II and grade III femoral cortical notching groups with cam resection. CLINICAL RELEVANCE: Iatrogenic cortical notching may lead to an increased risk of postsurgical complications, specifically femoral neck fracture. Thus, surgical intervention for a cam lesion femoral osteoplasty should strive for precision, especially around the femoral neck.