Radiographic evidence of medial longitudinal arch restoration following naviculocuneiform arthrodesis in progressive collapsing foot deformity: a retrospective case series
DOI:
https://doi.org/10.18203/issn.2455-4510.IntJResOrthop20254229Keywords:
Collapsing foot deformity, Flatfoot, Adult acquired flatfoot, Naviculocuneiform arthrodesis, Midfoot arthrodesisAbstract
The objective of this study was to demonstrate the corrective effect of naviculocuneiform (NC) arthrodesis on the medial longitudinal arch in collapsing foot deformity (CFD) and to establish radiographic criteria for its indication as a stand-alone or complementary surgical procedure. NC arthrodesis was performed in 17 patients diagnosed with CFD, with clinical and radiological follow-up conducted to evaluate correction of the medial longitudinal arch. Postoperative angular measurements were obtained at five weeks under weight-bearing conditions after removal of the short-leg cast. Statistically significant radiographic improvements (p<0.05) were observed in all parameters except for the calcaneal pitch angle (p>0.05). The mean preoperative Meary angle was 11.8°, with an average reduction of 10°, resulting in a postoperative mean of 1.9° (p<0.05). The preoperative talocalcaneal angle in the Saltzman view averaged 6.02° compared to 2.7° postoperatively (p<0.05). The talo–scaphoid coverage angle decreased from a mean of 34.5° preoperatively to 22.9° postoperatively (p<0.05), while the talo–scaphoid incongruence angle improved from 39.3° to 24.2° (p<0.05). Although the calcaneal pitch angle improved slightly (19.1° to 21.0°), the change was not statistically significant (p>0.05). NC arthrodesis proved to be an effective technique for correcting collapsing foot deformity, achieving significant restoration of medial arch alignment and stability with consistent improvements in key radiographic parameters.
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