Tags

Type your tag names separated by a space and hit enter

Biomechanical assessment of flexible flatfoot correction: comparison of techniques in a cadaver model.
J Bone Joint Surg Am. 2014 Mar 19; 96(6):e45.JB

Abstract

BACKGROUND

Options for surgical correction of acquired flexible flatfoot deformity involve bone and soft-tissue reconstruction. We used an advanced cadaver model to evaluate the ability of key surgical procedures to correct the deformity and to resist subsequent loss of correction.

METHODS

Stage-IIB flatfoot deformity was created in ten cadaver feet through ligament sectioning and repetitive loading. Six corrective procedures were evaluated: (1) lateral column lengthening, (2) medial displacement calcaneal osteotomy with flexor digitorum longus transfer, (3) Treatment 2 plus lateral column lengthening, (4) Treatment 3 plus "pants-over-vest" spring ligament repair, (5) Treatment 3 plus spring ligament repair with use of the distal posterior tibialis stump, and (6) Treatment 3 plus spring ligament repair with suture and anchor. Correction of metatarsal dorsiflexion and of navicular eversion were quantified initially and periodically during postoperative cyclic loading.

RESULTS

Metatarsal dorsiflexion induced by arch flattening was initially corrected by 5.5° to 10.6°, depending on the procedure. Navicular eversion was initially reduced by 2.1° to 7.7°. The correction afforded by Treatments 1, 3, 4, 5, and 6 exceeded that of Treatment 2 initially and throughout postoperative loading. Inclusion of spring ligament repair did not significantly enhance correction.

CONCLUSIONS

Under the tested conditions, medial displacement calcaneal osteotomy with flexor digitorum longus tendon transfer was inferior to the other evaluated treatments for stage-IIB deformity. Procedures incorporating lateral column lengthening provided the most sagittal and coronal midfoot deformity correction. Addition of spring ligament repair to a combination of these three procedures did not substantially improve correction.

CLINICAL RELEVANCE

An understanding of treatment effectiveness is essential for optimizing operative management of symptomatic flatfoot deformity. This study provides empirical evidence of the advantage of lateral column lengthening and novel information on resistance to postoperative loss of correction.

Authors+Show Affiliations

Orthopedic Surgery, Clinica Alemana de Santiago, Vitacura 5951, Santiago, Chile.Department of Orthopaedic Surgery, Duke University Medical Center, P.O. Box 2950, Durham, NC 27710.Department of Orthopaedic Surgery, Duke University Medical Center, P.O. Box 2950, Durham, NC 27710.Department of Orthopaedic Surgery, Duke University Medical Center, P.O. Box 2950, Durham, NC 27710.

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

24647512

Citation

Zanolli, Diego H., et al. "Biomechanical Assessment of Flexible Flatfoot Correction: Comparison of Techniques in a Cadaver Model." The Journal of Bone and Joint Surgery. American Volume, vol. 96, no. 6, 2014, pp. e45.
Zanolli DH, Glisson RR, Nunley JA, et al. Biomechanical assessment of flexible flatfoot correction: comparison of techniques in a cadaver model. J Bone Joint Surg Am. 2014;96(6):e45.
Zanolli, D. H., Glisson, R. R., Nunley, J. A., & Easley, M. E. (2014). Biomechanical assessment of flexible flatfoot correction: comparison of techniques in a cadaver model. The Journal of Bone and Joint Surgery. American Volume, 96(6), e45. https://doi.org/10.2106/JBJS.L.00258
Zanolli DH, et al. Biomechanical Assessment of Flexible Flatfoot Correction: Comparison of Techniques in a Cadaver Model. J Bone Joint Surg Am. 2014 Mar 19;96(6):e45. PubMed PMID: 24647512.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Biomechanical assessment of flexible flatfoot correction: comparison of techniques in a cadaver model. AU - Zanolli,Diego H, AU - Glisson,Richard R, AU - Nunley,James A,2nd AU - Easley,Mark E, PY - 2014/3/21/entrez PY - 2014/3/22/pubmed PY - 2014/5/9/medline SP - e45 EP - e45 JF - The Journal of bone and joint surgery. American volume JO - J Bone Joint Surg Am VL - 96 IS - 6 N2 - BACKGROUND: Options for surgical correction of acquired flexible flatfoot deformity involve bone and soft-tissue reconstruction. We used an advanced cadaver model to evaluate the ability of key surgical procedures to correct the deformity and to resist subsequent loss of correction. METHODS: Stage-IIB flatfoot deformity was created in ten cadaver feet through ligament sectioning and repetitive loading. Six corrective procedures were evaluated: (1) lateral column lengthening, (2) medial displacement calcaneal osteotomy with flexor digitorum longus transfer, (3) Treatment 2 plus lateral column lengthening, (4) Treatment 3 plus "pants-over-vest" spring ligament repair, (5) Treatment 3 plus spring ligament repair with use of the distal posterior tibialis stump, and (6) Treatment 3 plus spring ligament repair with suture and anchor. Correction of metatarsal dorsiflexion and of navicular eversion were quantified initially and periodically during postoperative cyclic loading. RESULTS: Metatarsal dorsiflexion induced by arch flattening was initially corrected by 5.5° to 10.6°, depending on the procedure. Navicular eversion was initially reduced by 2.1° to 7.7°. The correction afforded by Treatments 1, 3, 4, 5, and 6 exceeded that of Treatment 2 initially and throughout postoperative loading. Inclusion of spring ligament repair did not significantly enhance correction. CONCLUSIONS: Under the tested conditions, medial displacement calcaneal osteotomy with flexor digitorum longus tendon transfer was inferior to the other evaluated treatments for stage-IIB deformity. Procedures incorporating lateral column lengthening provided the most sagittal and coronal midfoot deformity correction. Addition of spring ligament repair to a combination of these three procedures did not substantially improve correction. CLINICAL RELEVANCE: An understanding of treatment effectiveness is essential for optimizing operative management of symptomatic flatfoot deformity. This study provides empirical evidence of the advantage of lateral column lengthening and novel information on resistance to postoperative loss of correction. SN - 1535-1386 UR - https://www.unboundmedicine.com/medline/citation/24647512/Biomechanical_assessment_of_flexible_flatfoot_correction:_comparison_of_techniques_in_a_cadaver_model_ L2 - http://dx.doi.org/10.2106/JBJS.L.00258 DB - PRIME DP - Unbound Medicine ER -