Midterm outcomes of the modified Lapidus arthrodesis using the Phantom® Intramedullary Nail System for the treatment of hallux valgus

• Published in: Foot and ankle surgery 2024-10, Vol.30 (7), p.576-581
• Main Authors: Benavente Valdivia, Juan Carlos, Reategui Villegas, Diego
• Format: Article
• Language: English
• Subjects: EFAS Score; First tarsometatarsal joint instability; Hallux valgus correction; Intramedullary nail system; Modified Lapidus arthrodesis
• ISSN: 1268-7731; 1460-9584; 1460-9584
• DOI: 10.1016/j.fas.2024.05.001

Lapidus arthrodesis is one of the most commonly used techniques in the correction of moderate and severe hallux valgus. We analyzed the clinical and radiological outcomes after using the Phantom® Lapidus intramedullary nail to find an effective technique with low complications. We retrospectively analyzed data of 52 patients who underwent a modified Lapidus arthrodesis with an intramedullary nail at our center from November 2019 to September 2022. The mean follow-up period was 27 (range, 18–34) months. Clinical results were evaluated using the visual analog scale (VAS), the European Foot and Ankle Society score (EFAS) and the American Orthopaedic Foot and Ankle Society score (AOFAS); three different radiological measures were analyzed. The mean AOFAS score increased from 44.8 to 82 points. The mean EFAS score increased from 11.2 to 20.1 points. The mean VAS score decreased by 4.7 points. The mean EFAS Sport score was increased from 9.2 (SD 4.6) to 12.6 (SD 5.4) points. The intermetatarsal angle decreased from 15° to 6.9° and the hallux valgus angle by a mean of 17.9°. The forefoot width reduced from 93.6 to 84.7 mm. All results were statistically significant (p