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Distance mapping of the foot and ankle joints using weightbearing CT: The cavovarus configuration.
Foot Ankle Surg. 2020 May 26 [Online ahead of print]FA

Abstract

INTRODUCTION

The goal of this study was to characterize the abnormal joint surface interaction at the ankle, hindfoot and midfoot joints of the cavovarus foot using distance mapping on weightbearing computed tomography (WBCT) images by comparing a series of cavovarus feet to a series of normally-aligned feet.

METHODS

In this case-control study, ten feet (10 patients) with asymptomatic cavovarus shape (cases; N = 10) were compared to 10 matched-paired (by age, gender and body mass index) normally-aligned feet (10 patients) (controls; N = 10). Three-dimensional models were produced from the images and distance maps representing joint surface configuration were generated for the ankle, hindfoot and midfoot joints. The distance maps for each joint were then compared between the two groups and between regions in the same group.

RESULTS

In the cavovarus group there was a significant increase in surface-to-surface distance at the posterior tibiotalar joint and a reduced distance at the anterior part, together with a greater distance at the posterior half of the medial gutter. Also, a decrease in surface-to-surface distance on the anterior half of the anterior facet and an increased distance on the posterior quadrants of the posterior facet of the subtalar joint were found. At the sinus tarsi, the lateral aspect of the talonavicular joint, the naviculocuneiform and the tarsometatarsal joints there was a statistically significant increase in surface-to-surface distance in cavovarus patients as compared to controls.

CONCLUSION

Distance mapping analysis on WBCT images identified significant differences in surface-to-surface interaction at the foot and ankle joints between cavovarus and normally-aligned feet.

LEVEL OF EVIDENCE

Level III, case-control study.

Authors+Show Affiliations

Ramsay Générale de Santé Clinique de l'Union, Foot and Ankle Department, Toulouse, Occitanie, France.Drexel University, Philadelphia, PA, USA.University of Iowa, Carver College of Medicine, Department of Orthopedics and Rehabilitation, Iowa City, IA, USA.Orthopaedic and Traumatology Unit, University "Federico II", Naples, Italy.Drexel University, Philadelphia, PA, USA.Drexel University, Philadelphia, PA, USA. Electronic address: sieglers@drexel.edu.No affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32505510

Citation

Lintz, François, et al. "Distance Mapping of the Foot and Ankle Joints Using Weightbearing CT: the Cavovarus Configuration." Foot and Ankle Surgery : Official Journal of the European Society of Foot and Ankle Surgeons, 2020.
Lintz F, Jepsen M, De Cesar Netto C, et al. Distance mapping of the foot and ankle joints using weightbearing CT: The cavovarus configuration. Foot Ankle Surg. 2020.
Lintz, F., Jepsen, M., De Cesar Netto, C., Bernasconi, A., Ruiz, M., & Siegler, S. (2020). Distance mapping of the foot and ankle joints using weightbearing CT: The cavovarus configuration. Foot and Ankle Surgery : Official Journal of the European Society of Foot and Ankle Surgeons. https://doi.org/10.1016/j.fas.2020.05.007
Lintz F, et al. Distance Mapping of the Foot and Ankle Joints Using Weightbearing CT: the Cavovarus Configuration. Foot Ankle Surg. 2020 May 26; PubMed PMID: 32505510.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Distance mapping of the foot and ankle joints using weightbearing CT: The cavovarus configuration. AU - Lintz,François, AU - Jepsen,Maui, AU - De Cesar Netto,Cesar, AU - Bernasconi,Alessio, AU - Ruiz,Maria, AU - Siegler,Sorin, AU - ,, Y1 - 2020/05/26/ PY - 2020/03/29/received PY - 2020/05/08/revised PY - 2020/05/18/accepted PY - 2020/6/8/entrez KW - Distance mapping KW - Joint pressure KW - Varus KW - Weightbearing CT JF - Foot and ankle surgery : official journal of the European Society of Foot and Ankle Surgeons JO - Foot Ankle Surg N2 - INTRODUCTION: The goal of this study was to characterize the abnormal joint surface interaction at the ankle, hindfoot and midfoot joints of the cavovarus foot using distance mapping on weightbearing computed tomography (WBCT) images by comparing a series of cavovarus feet to a series of normally-aligned feet. METHODS: In this case-control study, ten feet (10 patients) with asymptomatic cavovarus shape (cases; N = 10) were compared to 10 matched-paired (by age, gender and body mass index) normally-aligned feet (10 patients) (controls; N = 10). Three-dimensional models were produced from the images and distance maps representing joint surface configuration were generated for the ankle, hindfoot and midfoot joints. The distance maps for each joint were then compared between the two groups and between regions in the same group. RESULTS: In the cavovarus group there was a significant increase in surface-to-surface distance at the posterior tibiotalar joint and a reduced distance at the anterior part, together with a greater distance at the posterior half of the medial gutter. Also, a decrease in surface-to-surface distance on the anterior half of the anterior facet and an increased distance on the posterior quadrants of the posterior facet of the subtalar joint were found. At the sinus tarsi, the lateral aspect of the talonavicular joint, the naviculocuneiform and the tarsometatarsal joints there was a statistically significant increase in surface-to-surface distance in cavovarus patients as compared to controls. CONCLUSION: Distance mapping analysis on WBCT images identified significant differences in surface-to-surface interaction at the foot and ankle joints between cavovarus and normally-aligned feet. LEVEL OF EVIDENCE: Level III, case-control study. SN - 1460-9584 UR - https://www.unboundmedicine.com/medline/citation/32505510/Distance_mapping_of_the_foot_and_ankle_joints_using_weightbearing_CT:_The_cavovarus_configuration L2 - https://linkinghub.elsevier.com/retrieve/pii/S1268-7731(20)30100-4 DB - PRIME DP - Unbound Medicine ER -