Functional reconstruction of a calcaneal deficit due to osteomyelitis with femoral head allograft and tendon rebalance

Clinical characteristics, treatment and efficacy of calcaneal osteomyelitis: a systematic review with synthesis analysis of 1118 reported cases

BACKGROUND

Calcaneal osteomyelitis (CO) still poses great challenges to orthopedic surgeons due to the unique anatomic and functional features of the calcaneus. This study summarized the current data regarding clinical characteristics, treatment and efficacy of CO, based on an analysis of literature-reported cases.

MATERIALS AND METHODS

The authors searched the PubMed, Embase, and Cochrane Library databases to find English and Chinese studies reporting on CO patients published between 2000 and 2021, with available data for synthesis analysis. The quality of the included studies was evaluated by the National Institutes of Health (NIH) assessment scale. Effective data were extracted and pooled for analysis.

RESULTS

Altogether 198 studies involving 1118 patients were included, with a male-to-female ratio of 2.3 (724 males and 310 females). The median age at CO diagnosis was 46 years, with a median symptom duration of 3 months. Injury-related infections (524 cases) and diabetic foot infections (336 cases) were the two most common causes, with ulcers (468 cases) and wound sinus or exudation (209 cases) being the predominant symptoms. The overall positive culture rate was 80.2%, with polymicrobial infections accounting for 18.1%. Staphylococcus aureus was the most frequently detected pathogen (42.7%), with fungal-related infections isolated in 17 cases. Although most patients received surgical interventions (96.9%), the recurrence rate was 20.1%. The incidence of infection relapse following partial calcanectomy, total calcanectomy, debridement with implantation of local antibiotics, and debridement with or without flap or skin coverage were 31.7%, 45.0%, 16.8%, and 15.1%, respectively. The overall incidence of limb amputation was 12.4%, with all-cause and CO-related mortalities of 2.8% and 0.2%, separately.

CONCLUSIONS

CO shared similar characteristics with extremity chronic osteomyelitis, primarily affecting young males, with trauma and diabetic foot as the leading causes and Staphylococcus aureus as the most frequently detected pathogen. Despite surgery being the primary treatment modality, clinical outcomes remained unsatisfactory, marked by high rates of infection recurrence and limb amputation.

Calcaneal reconstruction using a femoral head allograft and biologic adjuncts: A case report

We present a case of calcaneal reconstruction after both an improvised explosive device injury and subsequent salvage procedures left the patient with a large calcaneal defect and damaged hindfoot soft tissue. A subtalar arthrodesis was performed with a femoral head allograft, where it was fused to the remaining calcaneus and superiorly through the talus, to successfully reconstruct this defect. Demineralized bone matrix, bone morphogenetic protein, and concentrated bone marrow aspirate were also added as adjuncts to promote bone remodeling. At final follow-up, the patient denied pain, was fully weight-bearing, and had resumed an active lifestyle. Level of Evidence: Level V, Case Report.

Calcaneogenesis: the use of tibial bone transport for treatment of massively infected hindfoot defects

Massive hindfoot defects which result after se- questrectomy of chronic osteomyelitis (COM) or Trauma or after tumors resection is a real challenge to the treating surgeons with either amputation or other reconstructive plastic procedures as the only available options, Calcaneal osteomyelitis is a major cause with classical surgical management to cure the infection has limited success in preservation of the hindfoot shape, function, and mechanical stability. The surgical procedure reported with the use of the Ilizarov apparatus for partial or total calcaneal OM is aimed to preserve the Hindfoot.

Materials and Methods

We retrospectively reviewed 10 patients which were treated by radical debridement of the infected area, Ilizarov frame application and arthrodesis with bone reconstruction by the Ilizarov apparatus using tibial transport for Hindfoot salvage. The mean age at presentation was 33.5 years (range; 24-57) and the mean follow-up was 5.1 years (range; 2-12).Patients clinical and radiographic data were assessed according to the American Orthopaedic Foot & Ankle Society (AOFAS) Ankle- Hindfoot score.

Results

The mean preoperative American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Score was 48.3(range; 38-86) while the mean postoperative (AOFAS) was 58.5 (range; 45-73) , p value < 0.01 . Clinically all patients had anatomically stable feet with deformity correction and no signs of infection recurrence.

Conclusion

The use of Ilizarov distal tibial bone transport to fill massive hindfoot defects proved to be a reliable method for elimination of infection and reconstruction of large defects without the need for bony or soft tissue plastic procedures. The technique also has the ability to produce a rigid limb fixation following debridement and to fill in massive hindfoot defects due to other etiologies as well.

Clinical applications of allografts in foot and ankle surgery

PURPOSE

The purpose of this review is to systematically analyse current literature on the use of allografts in the surgical treatment of foot and ankle disorders in adult patients. Based on this study, we propose evidence-based recommendations.

METHODS

The database for PubMed was searched for all published articles. No timeframe restrictions were applied. Clinical studies eligible for inclusion met the following criteria: performed on patients over 18 years old; subject to surgical treatment of foot and ankle disorders; with report on the outcome of the use of allografts; with a report and assessment of pain and function, or equivalent; minimum follow-up of 1 year was required. Two reviewers independently screened and selected studies for full-text analysis from title and abstract. 107 studies were included from 1113 records. Studies were grouped according to surgical indications into ten categories: musculoskeletal tumours (n = 16), chronic ankle instability (n = 15), ankle arthritis (n = 14), osteochondral lesions of the talus (n = 12), Achilles tendon defects (n = 11), other tendon defects (n = 9), fusions (n = 9), fractures (n = 8), hallux rigidus (n = 3) and other indications (n = 10).

RESULTS

Most studies displayed evidence level of IV (n = 57) and V (n = 39). There was one level I, one level II and nine level III studies. Most studies reported allografting as a good option (n = 99; 92.5%). Overall complication rate was 17% (n = 202).

CONCLUSIONS

Fair evidence (Grade B) was found in favour of the use of allografts in lateral ankle ligament reconstruction or treatment of intra-articular calcaneal fracture. Fair evidence (Grade B) was found against the use of allogeneic MSCs in tibiotalar fusions.

LEVEL OF EVIDENCE

V.