Effects of Patient-Specific Instrumentation and Ancillary Surgery Performed in Conjunction With Total Ankle Implant Arthroplasty: Postoperative Radiographic Findings.

Accuracy and reproducibility when performing total ankle implant arthroplasty (TAA) are essential for longevity of the implant, maintaining relative stability of the joint, and theoretically reducing the formation of adjacent joint arthritis in the subtalar and knee joints. Studies have helped to illustrate the accuracy of implantation when using patient-specific instrumentation in both knee and ankle implant arthroplasty. Despite the findings of these studies, few have gone on to evaluate the effects of ancillary procedures on TAA; particularly their effects on postoperative implant congruity when performed simultaneously with joint replacement surgery. In this study, preoperative plans on implant alignment based on patient-specific computed tomography images were compared with the alignment observed on immediate postoperative radiographs. Additionally, postoperative joint congruity was measured, and operative reports were assessed to determine if concomitant procedures performed with total ankle replacement had a significant effect on overall alignment. In our population, 46/47 implants were within 1.5° of their anticipated placement in the coronal plane, and 100% were within 2° of anticipated placement in the sagittal plane. Using a spearman's rank-order correlation, our data failed to show any significant relationship between conducting additional procedures in conjunction with TAA (rho = 0.178; p value = .232) and postoperative congruency of the implant. These findings help support the accuracy of ankle implantation using patient-specific instrumentation, while also supporting the appropriate use of indicated procedures in conjunction with total ankle replacement to help obtain a congruent joint postoperatively.

Incidence of Talar Osteochondral Lesions After Acute Ankle Fracture: A Retrospective Analysis.

Recent literature suggests the majority of osteochondral lesions occur in the ankle joint. Previous studies have suggested that varying incidences of talar osteochondral lesions (OCLT) are associated with ankle fractures. The primary aim of our study was to investigate the incidence of osteochondral lesions associated with acute ankle fractures as observed on computed tomographic (CT) imaging. We also compared the rates of talar osteochondral lesions in patients who had ankle fractures with dislocation and closed manual reduction (CMR) prior to open reduction with internal fixation, to those who did not suffer from ankle joint dislocation. Additionally, a correlation between the location of talar dome lesions with type of ankle fracture as classified by Lauge-Hansen was investigated. Preoperative CT imaging was retrospectively reviewed in 108 patients with acute ankle fractures. A CT-modified version of Berndt Hardy's classification of osteochondral lesions, as previously described by Loomer et al, was used for diagnosis of lesions in our study. The incidence of lesions was calculated across all subjects, and retrospective comparison was performed in those who did and did not undergo closed manual reduction. Supplementary data on location of lesion and its association with ankle fracture type was also recorded. We found an overall incidence of 50.9% OCLT in patients with acute ankle fractures. This number did not significantly differ from those who underwent closed manual reduction (49%). Although a majority of lesions did occur posteriorly, we saw no statistically significant information was seen between either type of fractures or OCLT locations. Careful consideration and thorough evaluation of preoperative CT imaging should be assessed by the performing surgeon, as this could guide both diagnostic and therapeutic treatments for patients with possible osteochondral lesions of the talus undergoing surgical repair of a fractured ankle.

A Multicenter, Retrospective Study of Early Weightbearing for Modified Lapidus Arthrodesis.

The modified Lapidus arthrodesis is a long-established surgical technique for management of hallux valgus that provides reproducible results and quality patient outcomes. The data from 367 consecutive patients undergoing unilateral modified Lapidus arthrodesis from January 1, 2007 to December 31, 2008 at participating centers were retrospectively evaluated. The included patients were categorized into early weightbearing (≤ 21 days) and delayed weightbearing (> 21 days) groups. A total of 24 nonunions (6.5%) were identified, with 13 (7.1%) in the early weightbearing group and 11 (6.0%) in the delayed weightbearing group. To date, the present study is the largest multicenter investigation to evaluate early weightbearing after modified Lapidus arthrodesis and the only large study to directly compare early and delayed weightbearing. The findings of the present study have shown that early weightbearing for modified Lapidus arthrodesis does not increase the risk of nonunion when evaluating various fixation constructs.

Soft Tissue Pathology.

A wide spectrum of pathologies can lead to soft tissue abnormalities within the ankle joint. Many of these disorders can develop into irreversible joint degeneration if left untreated. Arthroscopy is frequently used to treat these soft tissue conditions such as instability, synovitis, impingement, arthrofibrosis, and other inflammatory disorders in the rearfoot and ankle. In general, the etiology of these ankle soft tissue disorders can be classified as traumatic, inflammatory, and congenital/neoplastic. Overall, the goal of diagnosing and treating soft tissue pathologies of the ankle is to restore anatomic and physiologic motion, reduce pain, optimize functional return to activity, and decrease the chance of recurrence while minimizing complications.

Revision of the Malaligned Ankle Arthrodesis.

A malaligned ankle arthrodesis is a painful and complicated pathology. Deformities may be present in the frontal, sagittal, or transverse plane or a combination of planes. Thorough preoperative evaluation of the deformity and the patient as a whole is crucial to successful revision. Surgical site for revision should be based on center of rotation of angulation, when possible. Revision commonly is performed through opening wedge osteotomy. Closing wedge and focal dome osteotomies, however, are excellent options. Revision also may be performed through external fixation or total ankle replacement. Although the literature is not rich with data, the options discussed provide favorable results.

Revision Surgery for the Achilles Tendon.

Treatment of Achilles tendon ruptures may be surgical or nonsurgical depending on health, history, age, acuity, and severity of the injury. With chronic or revisional injuries, the best method often requires an open repair with reconstructive soft tissue procedures. Revision surgery can be challenging because of the complexity involving tendinous deficits with nonviable and friable tissue. Surgical treatment is based on tendon approximation, size of the defect, tendon integrity, and functional demands. The goal is to restore anatomic and physiologic tension, provide adequate strength for proper ambulation, optimize functional return to activity, decrease pain, and decrease complications.

Current Concepts Regarding Total Ankle Replacement as a Viable Treatment Option for Advanced Ankle Arthritis: What You Need to Know.

Much of the current literature suggests that total ankle replacement (TAR) is no longer an inferior or fringe treatment for advanced ankle arthritis compared with ankle fusion, but rather a viable option for recalcitrant arthritic ankle pathology in the correct patient population. In this article, current concepts associated with successful outcomes for TAR are discussed with an emphasis on ankle joint anatomy and biomechanics, preoperative planning and patient selection, understanding pathomechanics and soft tissue balancing, as well as the surgeon's learning curve.

Posterior Tibial Tendon Transfer.

When performed correctly with the right patient population, a tibialis posterior muscle/tendon transfer is an effective procedure. Many different methods have been established for fixating the tendon, each of which has its' own indications. Passing through the interosseous membrane is the preferred and recommended method and should be used unless this is not possible. Good surgical planning based on patient needs and expectations, along with excellent postoperative care including early range of motion and physical therapy minimizes risk of complications and allows for the optimal outcome to be achieved.

Surgical Correction of Rigid Equinovarus Contracture Utilizing Extensive Soft Tissue Release.

Although deforming contractures of the lower extremities after acute cerebrovascular events are well documented in the literature, there is limited literature regarding specific surgical considerations for the correction of these deformities, which are nonosseus in nature. The equinovarus foot, regardless of its origin, is a challenging pathologic condition for the foot and ankle surgeon. It is critical to have a firm understanding of the cause and symptoms behind an equinovarus deformity before treatment. The clinical presentation is discussed with special attention to deformities in adults with rigid equinovarus deformities after cerebrovascular-related accidents or peripheral ischemic events.

Soft Tissue Impingement of the Ankle: Pathophysiology, Evaluation, and Arthroscopic Treatment.

Soft tissue impingement (STI) syndrome is one of 3 causes of a larger all-encompassing joint impingement pathologic condition, which also includes bone and neuropathic entrapment. Altered joint biomechanics and friction of joint tissues combine to cause chronic pain and often functional instability. Although the most common form of STI to the ankle is anterolateral in location, posterior and anteromedial impingement is also discussed in this article. Furthermore, a discussion of biomechanical deficiencies and how they may effect location and cause of STI of the ankle is explored along with pathophysiology, clinical and diagnostic evaluation, current treatments, and long-term outcomes.

Small Joint Arthroscopy in the Foot.

Arthroscopy has advanced in the foot and ankle realm, leading to new innovative techniques designed toward treatment of small joint abnormality. A range of abnormalities that are currently widespread for arthroscopic treatment in larger joints continues to be translated to congruent modalities in the small joints. Small joint arthroscopy offers relief from foot ailments with a noninvasive element afforded by arthroscopy. Early studies have found comparable results from arthroscopic soft tissue procedures as well as arthrodesis of the small joints when compared with the standard open approach.

Percutaneous supramalleolar osteotomy for distal tibial (near articular) ankle deformities.

Supramalleolar osteotomies are performed to realign the distal tibia and to improve foot and ankle function. This procedure requires a thorough preoperative and intraoperative understanding of limb-deformity parameters and of the center of rotation of angulation method of surgical planning. Radiographic, gait, and clinical analyses along with intraoperative fluoroscopic images are paramount to deformity correction. This article describes the radiographic and clinical analyses and technical considerations in performing a focal dome supramalleolar osteotomy.

A systematic approach to evaluation of the rearfoot, ankle, and leg in reconstructive surgery.

The current literature shows that proper alignment of the lower extremity allows for greater function throughout the gait cycle. Therefore, realignment should be one of the primary goals in the surgical management of lower-extremity deformities and pathology. Multiplanar radiographic angular relationships should be critically evaluated to appropriately identify the level and extent of the deformity before performing realignment procedures. This article describes a systematic approach to deformity evaluation through a comprehensive radiographic assessment of the rearfoot, ankle, and lower leg.

Realignment considerations in the triple arthrodesis.

Triple arthrodesis is indicated for pain, deformity, and instability of the tritarsal complex. Although osseous consolidation is important to outcome, success depends primarily on appropriate realignment. A poorly positioned triple arthrodesis may result in continued pain and disability, gait disturbances, excessive stress in adjacent joints, and footwear problems. We present a protocol for intraoperative realignment of the triple arthrodesis guided by image intensification. This protocol for alignment evaluation was followed in nine patients who underwent triple arthrodesis for a variety of pathologies.

The complications encountered with the rheumatoid surgical foot and ankle.

Rheumatoid arthritis (RA) is a chronic, degenerative, systemic disease that leads to the destruction of articular cartilage of the joints. Complications, including infection, delays in wound healing, malunion, nonunion, implant failure, and degeneration of adjacent joints soon after primary fusion, have been described in the literature and are generally accepted as commonplace in reconstructive surgeries of the foot and ankle. The combined efforts of the surgeon and supporting physicians to maintain optimal health for the patient, along with the principles discussed in this article, can lead to superior outcomes with fewer complications in the postoperative course.