Antibiotic-coated intramedullary rod

Removal of Antibiotic Cement-Coated Interlocking Nails

OBJECTIVES

To report the outcomes of antibiotic cement-coated interlocking nail (ACCIN) removal, detail a removal technique that mitigates debonding of coating, and describe how to address occurrences intraoperatively.

DESIGN

Retrospective case series.

SETTING

Level II trauma center.

PATIENTS

Twenty-eight patients who underwent ACCIN removal between January 2014 and August 2019.

INTERVENTION

Removal of ACCINs that were coated using the silicone tubing method.

MAIN OUTCOME MEASUREMENTS

Successful removal of the nail with intact antibiotic coating.

RESULTS

A total of 42 ACCIN removals were included in this study. Successful ACCIN removal was achieved in 37 cases (88.1%), with debonding in only 5 cases (11.9%). Eight nails (19%) required 1 additional removal procedure, and 3 nails (7.1%) required 2 additional removal procedures. The main reasons for the additional procedures were nonunion and persistent infection.

CONCLUSIONS

ACCIN insertion and removal can be challenging. The proper technique of coating and insertion can facilitate later removal. Removal of knee-long fusion rods can be more challenging.

LEVEL OF EVIDENCE

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Outcomes of Various Antibiotic Cement-Coated Intramedullary Implants on the Treatment of Long Bone Septic Nonunion

OBJECTIVE

To determine the effectiveness of various types of antibiotic-coated intramedullary implants in the treatment of septic long bone nonunion.

DESIGN

Retrospective chart review.

SETTING

Level 1 trauma center.

PARTICIPANTS

Forty-one patients with septic long bone nonunion treated with an antibiotic cement-coated intramedullary implant.

INTERVENTION

Surgical debridement and placement of a type of antibiotic-coated intramedullary implant.

MAIN OUTCOME MEASUREMENTS

Union and need for reoperation.

RESULTS

At an average 27-month follow-up (6-104), 27 patients (66%) had a modified radiographic union score of the tibia of 11.5 or greater, 12 patients (29%) a score lower than 11.5, and 2 patients (5%) underwent subsequent amputation. Six patients underwent no further surgical procedures after the index operation. Patients treated with a rigid, locked antibiotic nail achieved earlier weight-bearing (P = 0.001), less frequently required autograft (P = 0.005), and underwent fewer subsequent procedures (average 0.38 vs. 3.60, P = 0.004) than those treated with flexible core antibiotic rods.

CONCLUSIONS

Antibiotic-coated intramedullary implants are successful in the treatment of septic nonunions in long bones. In our cohort, rigid, statically locked nails allowed faster rehabilitation, decreased the need for autograft, and decreased the number of additional surgical procedures. Further study is needed to confirm these findings.

LEVEL OF EVIDENCE

Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Antibiotic cement coating in orthopedic surgery: a systematic review of reported clinical techniques

Background

Antibiotic-containing cement and bone graft substitute-coated orthopedic implants provide the advantages of simultaneous local antibiotic delivery and internal stable fixation, aiding in both infection eradication and osseous healing. Standardized protocols pertaining to implant coating techniques in various clinical and particularly intraoperative settings are scarce, and available literature is limited. This systematic review aims to provide a summary of the available current literature reporting on custom-made coating techniques of orthopedic implants, indications, outcomes, and associated complications in clinical use.

Methods

A systematic search of the literature in PubMed, Medline, Embase, and Cochrane Library databases was performed in accordance with PRISMA guidelines. Articles reporting specifically on custom-made coating techniques of orthopedic implants in a clinical setting were eligible.

Results

A total of 41 articles with a cumulative total number of 607 cases were included. Indications for treatment mostly involved intramedullary infections after previous plate osteosynthesis or nailing. A variety of implants ranging from intramedullary nails, plates, wires, and rods served as metal cores for coating. Polymethylmethacrylate (PMMA) bone cement was most commonly used, with vancomycin as the most frequently added antibiotic additive. Chest tubes and silicone tubes were most often used to mold. Common complications are cement debonding and breakage of the metallic implant.

Conclusion

Adequate coating techniques can reduce the burden of treatment and be associated with favorable outcomes. Lack of general consensus and heterogeneity in the reported literature indicate that the perfect all-in-one implant coating method is yet to be found. Further efforts to improve implant coating techniques are warranted.

Level of evidence

III.

Coated nails: is their use supported by the literature?

Antibiotic-coated intramedullary nails have been popularized in recent decades for treating long-bone infections. They are especially useful in treating diaphyseal infections requiring stability, such as those involving fractures and nonunions. The nails are made by injecting antibiotic-impregnated polymethylmethacrylate or "cement" around a metal core using a silicone tube as a mold. There are a variety of techniques that can be used to customize the nail to the affected site. Antibiotic cement has long been demonstrated as an effective local antibiotic delivery system. It is able to elute high concentrations of antibiotics while having little systemic toxicity. Several case series have reported good outcomes using this technique, defined by bone union and infection control. Further research is needed to determine the amount of weight that can safely be transferred through the nail and to optimize antibiotic elution.

Single-Stage Tibiotalocalcaneal Arthrodesis With Use of an Antibiotic-Coated Intramedullary Nail for Limb Salvage Following an Open Pilon Fracture Complicated by Osteomyelitis: A Case Report

Severe limb deformity can create a major disability, which can ultimately lead to a nonambulatory lifestyle. Limb deformities created by open fractures not only put a patient at risk for a nonfunctional lifestyle but also may lead to gross contamination and osteomyelitis of the osseous structures. At times, these deformities require amputation for better functionality. It is our belief, however, that an attempt at limb salvage should always be considered. When encountering limb deformities with osteomyelitis, most literature refers to a staged technique in which 2 procedures need to be performed: this includes external fixation and/or a temporary antibiotic spacer followed by a permanent intramedullary nail after complete resolution of the infection. Staged procedures prolong the non-weightbearing status of the patient, often decreasing quality of life. The use of a single-stage antibiotic-coated nail has rarely been discussed in the literature. Here we discuss a single-stage technique that may be an option for major deformity limb salvage in the setting of chronic osteomyelitis. This is a case report presenting a 60-year-old female who suffered an open pilon fracture resulting in osteomyelitis and was successfully treated with use of an antibiotic-coated intramedullary nail in a single stage.

Staged Treatment of Infected Tibiotalar Fusion Using a Combination Antibiotic Spacer and Antibiotic-Coated Intramedullary Nail

Pilon fractures are notoriously difficult injuries to treat. The current published data on salvage procedures after failed pilon fractures includes both total ankle arthroplasty (TAA) and tibiotalar fusion, each with its own specific indications. However, no acceptable treatment algorithm addressing the complications of these limb salvage procedures is available. We present the case of a 23-year-old patient, who sustained a complex pilon fracture after a motor vehicle accident. The patient was referred to our institution after an initial fixation attempt, followed by subsequent failed TAA, which was complicated by an infected fusion attempt. We describe a staged treatment approach to clearing the infection and obtaining the final fusion goals.

Tibiotalocalcaneal arthrodesis

Combined arthrodesis of the ankle and subtalar joint is a challenging but potentially rewarding procedure for certain patients. The author discusses multiple aspects of the procedure from patient counseling to postoperative complications.

Management of severe deformity using a combination of internal and external fixation

This review addresses severe foot and ankle deformities and describes techniques for internal and external fixation. A combination of internal and external fixation techniques is often necessary in severe foot and ankle deformities secondary to leg length discrepancies. This article includes a thorough literature review as well as an extensive description of these techniques.