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Kim J, Ellis S, Carrino JA. Weight-Bearing Computed Tomography of the Foot and Ankle-What to Measure? Clin Podiatr Med Surg 2024; 41:775-796. [PMID: 39237184 DOI: 10.1016/j.cpm.2024.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2024]
Abstract
Weight-bearing computed tomography (WBCT) was introduced in 2012 for foot and ankle applications as a breakthrough technology that enables full weight-bearing, three-dimensional imaging unaffected by x-ray beam projections or foot orientation. The literature describing the use of WBCT in the treatment of foot and ankle disorders is growing, and this article provides an overview of what can be measured with WBCT.
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Affiliation(s)
- Jaeyoung Kim
- Foot and Ankle Service, Hospital for Special Surgery, 532 East 72nd Street, New York, NY, USA
| | - Scott Ellis
- Foot and Ankle Service, Hospital for Special Surgery, 532 East 72nd Street, New York, NY, USA
| | - John A Carrino
- Department of Radiology, Hospital for Special Surgery, 535 East 70th Street, New York, NY, USA.
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Pires EA, Lobo CFT, Fonseca FC, Sposeto RB, Barbachan Mansur NS, Easley ME, de Cesar Netto C, Godoy-Santos AL. Hindfoot Alignment in Flexible Cavovarus Deformity Under Orthostatic and Coleman Block Test Positions: A Weightbearing Computed Tomography Study. Foot Ankle Int 2024; 45:1027-1037. [PMID: 39056577 DOI: 10.1177/10711007241258180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
BACKGROUND Flexible cavovarus deformity is prevalent and the Coleman block test is frequently used to assess the first ray plantarflexion malpositioning in the overall deformity as well as the flexibility of the hindfoot. The objective was to assess and compare the weightbearing computed tomography (WBCT) 3-dimensional (3D) changes in clinical and bone alignment in flexible cavovarus deformity patients when performing the Coleman block test when compared to normal standing position and to controls. METHODS Twenty patients (40 feet) with flexible cavovarus deformity and 20 volunteer controls (40 feet) with normal foot alignment underwent WBCT imaging of the foot and ankle. Cavovarus patients were assessed in normal orthostatic and Coleman block test positions. Foot and ankle offset (FAO), hindfoot alignment angle (HAA), talocalcaneal angle (TCA), subtalar vertical angle (SVA) and talonavicular coverage angle (TNCA) and a CT-simulated soft tissue envelope image, WBCT clinical hindfoot alignment angle (WBCT-CHAA), were evaluated by 2 readers. Measurements were compared between cavovarus nonstressed and stressed positions and to controls. P values of .05 or less were considered significant. RESULTS The intra- and interobserver intraclass correlation coefficient were good or excellent for all WBCT measurements. Cavovarus patients demonstrated significant correction of WBCT-CHAA (9.7 ± 0.4 degrees), FAO (2.6 ± 0.4%), and TNCA (8.8 ± 1.8 degrees) when performing the Coleman block test (all P values <.0001). However, WBCT-CHAA and FAO measurements were still residually deformed and significantly different from controls (P values of .001 and <.0001, respectively). TNCA values corrected to values similar to healthy controls (P = .29). No differences were observed in cavovarus patients during Coleman block test for the coronal measures: HAA, TCA, and SVA measurements. CONCLUSION In this study, we observed improvement in the overall 3D WBCT alignment (FAO), axial plane adduction deformity (TNCA), as well as CT simulated clinical hindfoot alignment (WBCT-CHAA) in flexible cavovarus deformity patients when performing a Coleman block test. However, we did not find improvement in measures of coronal alignment of the hindfoot, indicating continued varus positioning of the hindfoot in these patients.
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Affiliation(s)
- Eduardo Araujo Pires
- Laboratório Professor Manlio Mario Marco Napoli, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Carlos Felipe Teixeira Lobo
- Laboratório Professor Manlio Mario Marco Napoli, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Fabio Correa Fonseca
- Laboratório Professor Manlio Mario Marco Napoli, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Rafael Barban Sposeto
- Laboratório Professor Manlio Mario Marco Napoli, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | | | - Mark E Easley
- Division of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Cesar de Cesar Netto
- Division of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Alexandre Leme Godoy-Santos
- Laboratório Professor Manlio Mario Marco Napoli, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
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Malhotra K, Patel S, Cullen N, Welck M. Forefoot Morphotypes in Cavovarus Feet: A Novel Assessment of Deformity. Foot Ankle Int 2024; 45:746-756. [PMID: 38618692 DOI: 10.1177/10711007241242779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
BACKGROUND The cavovarus foot is a complex 3-dimensional deformity. Although a multitude of techniques are described for its surgical management, few of these are evidence based or guided by classification systems. Surgical management involves realignment of the hindfoot and soft tissue balancing, followed by forefoot balancing. Our aim was to analyze the pattern of residual forefoot deformities once the hindfoot is corrected, to guide forefoot correction. METHODS We included 20 cavovarus feet from 16 adult patients with Charcot-Marie-Tooth who underwent weightbearing CT (mean age 43.4 years, range: 22-78 years, 14 males). Patients included had flexible deformities, with no previous surgery. Using specialized software (Bonelogic 2.1, Disior) a 3-dimensional, virtual model was created. Using morphologic data captured from normal feet in patients without pathology as a guide, the talonavicular joint of the cavovarus foot was digitally reduced to a "normal" position to simulate the correction that would be achieved during surgical correction. Models of the corrected position were exported and geometrically analyzed using Blender 3.64 to identify anatomical trends. RESULTS We identified 4 types of cavovarus forefoot morphotypes. Type 0 was defined as a balanced forefoot (2 cases, 10%). Type 1 was defined as a forefoot where the first metatarsal was relatively plantarflexed to the rest of the foot, with no significant residual adduction after talonavicular joint correction (12 cases, 60%). Type 2 was defined as a forefoot where the second and first metatarsals were progressively plantarflexed, with no significant adduction (4 cases, 20%). Type 3 was defined as a forefoot where the metatarsals were adducted after talonavicular derotation (2 cases, 10%). CONCLUSION In this relatively small cohort, we identified 4 forefoot morphotypes in cavovarus feet that might help surgeons to recognize and anticipate the residual forefoot deformities after hindfoot correction. Different treatment strategies may be required for different morphotypes to achieve balanced correction. LEVEL OF EVIDENCE Level IV, retrospective case series.
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Affiliation(s)
- Karan Malhotra
- Foot & Ankle Unit, Royal National Orthopaedic Hospital, Stanmore, United Kingdom
- Department of Orthopaedics & Musculoskeletal Science, University College London, London, United Kingdom
| | - Shelain Patel
- Foot & Ankle Unit, Royal National Orthopaedic Hospital, Stanmore, United Kingdom
- Department of Orthopaedics & Musculoskeletal Science, University College London, London, United Kingdom
| | - Nicholas Cullen
- Foot & Ankle Unit, Royal National Orthopaedic Hospital, Stanmore, United Kingdom
| | - Matthew Welck
- Foot & Ankle Unit, Royal National Orthopaedic Hospital, Stanmore, United Kingdom
- Department of Orthopaedics & Musculoskeletal Science, University College London, London, United Kingdom
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Mania S, Beeler S, Wirth S, Viehöfer A. Talocalcaneal Ligament Reconstruction Kinematic Simulation for Progressive Collapsing Foot Deformity. Foot Ankle Int 2024; 45:166-174. [PMID: 38083852 PMCID: PMC10860361 DOI: 10.1177/10711007231213361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2024]
Abstract
BACKGROUND In progressive collapsing foot deformity (PCFD), an internal and plantar rotation of the talus relative to the calcaneus may result in painful peritalar subluxation. Medial soft tissue procedures (eg, spring ligament repair) aim to correct the talar position via the navicular bone if bony correction alone is not sufficient. The effect of the medial soft tissue reconstruction on the talar reposition remains unclear. We hypothesized that a subtalar talocalcaneal ligament reconstruction might be favorable in PCFD to correct talar internal malposition directly. This pilot study aims to evaluate the anatomical feasibility and kinematic behavior of a subtalar ligament reconstruction in PCFD. METHODS Three-dimensional surface model from 10 healthy ankles were produced. A total of 1089 different potential ligament courses were evaluated in a standardized manner. A motion of inversion/eversion and talar internal/external in relation to the calcaneus were simulated and the ligament strain, expressed as a positive length variation, for each ligament was analyzed. The optimal combination for the ligament reconstruction with increased length in internal rotation of the talus, isometric kinematic behavior in inversion/eversion, and extraarticular insertion on talus and calcaneus was selected. RESULTS A laterodistal orientation of the talar insertion point in respect to the subtalar joint axis and laterodistal deviation of the calcaneal insertion point presents the highest ligament lengthening in internal talar rotation (+0.56 mm [3.8% of total length]) and presented a near-isometric performance in inversion/eversion (+0.01 to -0.01 mm [0.1% of total length]). CONCLUSION This kinematic model shows that a ligament reconstruction in the subtalar space presents a pattern of length variation that may stabilize the internal talar rotation without impeding the physiological subtalar motion. CLINICAL RELEVANCE This study investigates the optimal location, feasibility, and kinematic behavior of a ligament reconstruction that could help stabilize peritalar subluxation in progressive collapsing foot deformity. [Formula: see text].
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Affiliation(s)
- Sylvano Mania
- Department of Orthopaedics, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Silvan Beeler
- Department of Orthopaedics, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Stephan Wirth
- Department of Orthopaedics, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Arnd Viehöfer
- Department of Orthopaedics, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
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Schmidt E, Lalevée M, Kim KC, Carvalho KAMD, Dibbern K, Lintz F, Barbachan Mansur NS, de Cesar Netto C. The Role of the Transverse Arch in Progressive Collapsing Foot Deformity. Foot Ankle Int 2024; 45:44-51. [PMID: 37902231 DOI: 10.1177/10711007231205298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
BACKGROUND The transverse arch (TA) has recently been shown to significantly increase the intrinsic stiffness of the midfoot when coupled with the medial longitudinal arch (MLA). Progressive collapsing foot deformity (PCFD) is a complex deformity that ultimately results in a loss of stiffness and collapse of the MLA. The role of the TA has not been investigated in patients diagnosed with this disorder using weightbearing CT (WBCT). Therefore, this study aims to answer the following questions: (1) Is the curvature of the TA decreased in PCFD? (2) Where within the midfoot does TA curvature flattening happen in PCFD? METHODS A retrospective review of weightbearing CT images was conducted for 32 PCFD and 32 control feet. The TA curvature was assessed both indirectly using previously described methods and directly using a novel measurement termed the transverse arch plantar (TAP) angle that assesses the angle formed between the first, second, and fifth metatarsals in the coronal plane. Location of TA collapse was also assessed in the coronal plane. RESULTS The TAP angle was significantly higher in PCFD (mean 115.2 degrees, SD 10.7) than in the control group (mean 100.8 degrees, SD 7.9) (P < .001). No difference was found using the calculated normalized TA curvature between PCFD (mean 17.1, SD 4.8) and controls (mean 18.3, SD 4.0) (P = .266). Location of collapse along the TA in PCFD was most significant at the second metatarsal and medial cuneiform. CONCLUSION The TA is more collapsed in PCFD compared to controls. This collapse was most substantial between the plantar medial cuneiform and the plantar second metatarsal. This may represent a location of uncoupling of the TA and MLA. LEVEL OF EVIDENCE Level III, retrospective case control.
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Affiliation(s)
- Eli Schmidt
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Matthieu Lalevée
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
- Department of Orthopedic Surgery, Rouen University Hospital, Rouen, France
| | - Ki Chun Kim
- Department of Orthopaedic Surgery, Seoul Medical Center, Seoul, South Korea
| | | | - Kevin Dibbern
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Francois Lintz
- Department of Foot and Ankle Surgery, Ramsay Healthcare, Clinique de L'Union, Saint-Jean, France
| | - Nacime Salomao Barbachan Mansur
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
- Federal University of Sao Paulo, Paulista School of Medicine, Department of Orthopedics and Traumatology, Sau Paulo, Brazil
| | - Cesar de Cesar Netto
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
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Li J, Fang M, Van Oevelen A, Peiffer M, Audenaert E, Burssens A. Diagnostic applications and benefits of weightbearing CT in the foot and ankle: A systematic review of clinical studies. Foot Ankle Surg 2024; 30:7-20. [PMID: 37704542 DOI: 10.1016/j.fas.2023.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 08/16/2023] [Accepted: 09/01/2023] [Indexed: 09/15/2023]
Abstract
BACKGROUND Foot and ankle weightbearing CT (WBCT) imaging has emerged over the past decade. However, a systematic review of diagnostic applications has not been conducted so far. METHOD A systematic literature search was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines after Prospective Register of Systematic Reviews (PROSPERO) registration. Studies analyzing diagnostic applications of WBCT were included. Main exclusion criteria were: cadaveric specimens and simulated WBCT. The Methodological Index for Non-Randomized Studies (MINORS) was used for quality assessment. RESULTS A total of 78 studies were eligible for review. Diagnostic applications were identified in following anatomical area's: ankle (n = 14); hindfoot (n = 41); midfoot (n = 4); forefoot (n = 19). Diagnostic applications that could not be used on weightbearing radiographs (WBRX) were reported in 56/78 studies. The mean MINORS was 9.8/24 (range: 8-12). CONCLUSION Diagnostic applications of WBCT were most frequent in the hindfoot, but other areas are on the rise. Post-processing of images was the main benefit compared to WBRX based on a moderate quality of the identified studies.
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Affiliation(s)
- Jing Li
- Department of Orthopaedics, Ghent University Hospital, Ghent, Belgium
| | - Mengze Fang
- Department of Orthopaedics, Ghent University Hospital, Ghent, Belgium
| | - Aline Van Oevelen
- Department of Orthopaedics, Ghent University Hospital, Ghent, Belgium
| | - Matthias Peiffer
- Department of Orthopaedics, Ghent University Hospital, Ghent, Belgium
| | | | - Arne Burssens
- Department of Orthopaedics, Ghent University Hospital, Ghent, Belgium.
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de Cesar Netto C, Barbachan Mansur NS, Lalevee M, Carvalho KAMD, Godoy-Santos AL, Kim KC, Lintz F, Dibbern K. Effect of Peritalar Subluxation Correction for Progressive Collapsing Foot Deformity on Patient-Reported Outcomes. Foot Ankle Int 2023; 44:1128-1141. [PMID: 37698292 DOI: 10.1177/10711007231192479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
BACKGROUND Peritalar subluxation (PTS) is part of progressive collapsing foot deformity (PCFD). This study aimed to evaluate initial deformity correction and PTS optimization in PCFD patients with flexible hindfoot deformity undergoing hindfoot joint-sparing surgical procedures and its relationship with improvements in patient-reported outcome measures (PROMs) at latest follow-up. We hypothesized that significant deformity/PTS correction would be observed postoperatively, positively correlating with improved PROMs. METHODS A prospective comparative study was performed with 26 flexible PCFD patients undergoing hindfoot joint-sparing reconstructive procedures, mean age 47.1 years (range, 18-77). We assessed weightbearing computed tomography (WBCT) overall deformity (foot and ankle offset [FAO]) and PTS markers (distance and coverage maps) at 3 months, as well as PROMs at final follow-up. A multivariate regression model assessed the influence of initial deformity correction and PTS optimization in patient-reported outcomes. RESULTS Mean follow-up was 19.9 months (6-39), and the average number of procedures performed was 4.8 (2-8). FAO improved from 9.4% (8.4-10.9) to 1.9% (1.1-3.6) postoperatively (P < .0001). Mean coverage improved by 69.6% (P = .012), 12.1% (P = .0343) and 5.2% (P = .0074) in, respectively, the anterior, middle, and posterior facets, whereas the sinus tarsi coverage decreased by an average 57.1% (P < .0001) postoperatively. Improvements in patient-reported outcomes were noted for all scores assessed (P < .03). The multivariate regression analysis demonstrated that improvement in both FAO and PTS measurements significantly influenced the assessed PROMs. CONCLUSION This study demonstrated significant improvements in the overall 3D deformity, PTS markers, and PROMs following hindfoot joint-sparing surgical treatment in patients with flexible PCFD. More importantly, initial 3D deformity correction and improvement in subtalar joint coverage and extraarticular impingement have been shown to influence PROMs significantly and positively. Addressing these variables should be considered as goals when treating PCFD. LEVEL OF EVIDENCE Level II, prospective cohort study.
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Affiliation(s)
- Cesar de Cesar Netto
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), Iowa City, IA, USA
| | - Nacime Salomao Barbachan Mansur
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), Iowa City, IA, USA
- Department of Orthopedics and Traumatology, Escola Paulista de Medicina, UNIFESP, São Paulo, Brazil
| | - Matthieu Lalevee
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), Iowa City, IA, USA
- Service d'orthopédie Traumatologie, Centre Hospitalier Universitaire de Rouen, Rouen, France
| | | | | | - Ki Chun Kim
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), Iowa City, IA, USA
- Department of Orthopaedic Surgery, Seoul Medical Center, Seoul, Republic of Korea
| | | | - Kevin Dibbern
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), Iowa City, IA, USA
- Marquette University, Milwaukee, WI, USA
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Abstract
Weight-bearing computed tomography (WBCT) was introduced in 2012 for foot and ankle applications as a breakthrough technology that enables full weight-bearing, three-dimensional imaging unaffected by x-ray beam projections or foot orientation. The literature describing the use of WBCT in the treatment of foot and ankle disorders is growing, and this article provides an overview of what can be measured with WBCT.
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Affiliation(s)
- Jaeyoung Kim
- Foot and Ankle Service, Hospital for Special Surgery, 532 East 72nd Street, New York, NY, USA
| | - Scott Ellis
- Foot and Ankle Service, Hospital for Special Surgery, 532 East 72nd Street, New York, NY, USA
| | - John A Carrino
- Department of Radiology, Hospital for Special Surgery, 535 East 70th Street, New York, NY, USA.
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Zhang S, Sun C, Zhang J, Wang Z, Zhao H, Zhang M. Changes in the subtalar joint alignment after supramalleolar osteotomy for varus ankle arthritis. Foot Ankle Surg 2023; 29:475-480. [PMID: 37407354 DOI: 10.1016/j.fas.2023.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 06/11/2023] [Accepted: 06/24/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND The subtalar joint may compensate for tibio-talar deformity, but what would happen to the joint after the deformity was corrected is not well known. Supramalleolar osteotomy (SMOT) is an effective procedure for the treatment of varus deformity of ankle arthritis. The objective of this study was to investigate the subtalar joint alignment pre and postoperatively following SMOT, and the factors which influenced the alignment of the subtalar joint. METHODS Thirty-one patients with varus ankle arthritis (Takakura stage 2, 3a and 3b) who were treated using SMOT were retrospectively reviewed. The subtalar and ankle joint alignment was measured on weightbearing radiograph and weightbearing computerized tomography (WBCT). RESULTS The foot and ankle offset (FAO), tibial articular surface angle (TAS), tibio-talar surface angle (TTS), and subtalar vertical angle (SVA) were significantly corrected (P<0.05). The subtalar inclination angle (SIA) decreased in 19 patients and increased in the other 12 cases after the SMOT (P<0.001). The shift of subtalar joint (ΔSIA) showed an inverse correlation with the preoperative FAO (P<0.001, r = -0.621). CONCLUSIONS The shift of subtalar joint after SMOT could maintain the neutral position of the hindfoot and showed a negative correlation with the preoperative FAO. The ΔSIA was greater in the severer preoperative hindfoot deformity. LEVEL OF EVIDENCE Level IV, case series.
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Affiliation(s)
- Shu Zhang
- Department of Foot and Ankle Surgery , Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Chao Sun
- Department of Foot and Ankle Surgery , Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Jianzhong Zhang
- Department of Foot and Ankle Surgery , Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Zhi Wang
- Department of Foot and Ankle Surgery , Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China
| | - Hongmou Zhao
- Foot and Ankle Surgery Department, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710054, China.
| | - Mingzhu Zhang
- Department of Foot and Ankle Surgery , Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China.
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Lintz F, Ricard C, Mehdi N, Laborde J, Bernasconi A, Richardi G, Sans N. Hindfoot alignment assessment by the foot-ankle offset: a diagnostic study. Arch Orthop Trauma Surg 2023; 143:2373-2382. [PMID: 35445859 DOI: 10.1007/s00402-022-04440-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 04/01/2022] [Indexed: 11/02/2022]
Abstract
INTRODUCTION Foot-ankle offset (FAO) is a three-dimensional (3D) biometric measurement of hindfoot alignment (HA) measured on images from weight-bearing computed tomography (WBCT). Our aim was to investigate its distribution in a large cohort of patients, hypothesizing that threshold FAO values in valgus or varus could be identified as markers for increased risk of associated pathologies. MATERIALS AND METHODS Prospective, monocentric, level II study including 125 subjects (250 feet) undergoing bilateral WBCT [58.4% female; mean age, 54 years (18-84)]. Patients were clinically assessed and pathologies were classified according to anatomic location (valgus- or varus associated). HA was measured using FAO on 3D datasets and tibio-calcaneal angles (TCA) on two-dimensional Saltzman-El-Khoury views. Threshold FAO values and area under the receiver operating characteristics curve (AUC) were calculated for predicting increased risk of medial or lateral pathologies. RESULTS Mean FAO was 1.65% ± 4.72 and mean TCA was 4.15° ± 7.67. Clinically, 167 feet were normal, 33 varus and 50 valgus with FAO values of 1.71% ± 3.16, - 4.96% ± 5.30 and 5.79% ± 3.77, respectively. Mean FAO was 0.99% ± 3.26 for non-pathological feet, - 2.53% ± 5.05 for lateral and 6.81% ± 2.70 for medial pathologies. Threshold FAO values of - 1.64% (51.4% sensitivity, 85.1% specificity, AUC = 0.72) and 2.71% (95% sensitivity, 82.8% specificity, AUC = 0.93) best predicted the risk of lateral and medial pathology, respectively. CONCLUSION Patients with FAO between - 1.64% and 2.71% had the least risk of degenerative foot and ankle pathology. This interval could be considered a target for patients undergoing realignment procedures. CLINICAL RELEVANCE A "safe zone" for Foot Ankle Offset was described between - 1.64% and 2.71%, for which the risk of foot and ankle pathologies is lower. LEVEL OF EVIDENCE II-Diagnostic study.
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Affiliation(s)
- François Lintz
- Department of Foot and Ankle Surgery, Ramsay Healthcare, Clinique de L'Union, Saint-Jean, France.
| | - Claire Ricard
- Department of Radiology, Pierre-Paul Riquet Hospital, University Hospital, Toulouse, France
| | - Nazim Mehdi
- Department of Foot and Ankle Surgery, Ramsay Healthcare, Clinique de L'Union, Saint-Jean, France
| | - Julien Laborde
- Department of Foot and Ankle Surgery, Ramsay Healthcare, Clinique de L'Union, Saint-Jean, France
| | - Alessio Bernasconi
- Department of Public Health, Orthopaedic and Traumatology Unit, University of Napoli "Federico II", Napoli, Italy
| | - Gérard Richardi
- Department of Foot and Ankle Surgery, Ramsay Healthcare, Clinique de L'Union, Saint-Jean, France
| | - Nicolas Sans
- Department of Radiology, Pierre-Paul Riquet Hospital, University Hospital, Toulouse, France
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Polichetti C, Borruto MI, Lauriero F, Caravelli S, Mosca M, Maccauro G, Greco T, Perisano C. Adult Acquired Flatfoot Deformity: A Narrative Review about Imaging Findings. Diagnostics (Basel) 2023; 13:225. [PMID: 36673035 PMCID: PMC9857373 DOI: 10.3390/diagnostics13020225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 12/20/2022] [Accepted: 01/05/2023] [Indexed: 01/11/2023] Open
Abstract
Adult acquired flatfoot deformity (AAFD) is a disorder caused by repetitive overloading, which leads to progressive posterior tibialis tendon (PTT) insufficiency. It mainly affects middle-aged women and occurs with foot pain, malalignment, and loss of function. After clinical examination, imaging plays a key role in the diagnosis and management of this pathology. Imaging allows confirmation of the diagnosis, monitoring of the disorder, outcome assessment and complication identification. Weight-bearing radiography of the foot and ankle are gold standard for the diagnosis of AAFD. Magnetic Resonance Imaging (MRI) is not routinely needed for the diagnosis; however, it can be used to evaluate the spring ligament and the degree of PTT damage which can help to guide surgical plans and management in patients with severe deformity. Ultrasonography (US) can be considered another helpful tool to evaluate the condition of the PTT and other soft-tissue structures. Computed Tomography (CT) provides enhanced, detailed visualization of the hindfoot, and it is useful both in the evaluation of bone abnormalities and in the accurate evaluation of measurements useful for diagnosis and post-surgical follow-up. Other state-of-the-art imaging examinations, like multiplanar weight-bearing imaging, are emerging as techniques for diagnosis and preoperative planning but are not yet standardized and their scope of application is not yet well defined. The aim of this review, performed through Pubmed and Web of Science databases, was to analyze the literature relating to the role of imaging in the diagnosis and treatment of AAFD.
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Affiliation(s)
- Chiara Polichetti
- Orthopedics and Trauma Surgery Unit, Department of Ageing, Neurosciences, Head-Neck and Orthopedics Sciences, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Maria Ilaria Borruto
- Orthopedics and Trauma Surgery Unit, Department of Ageing, Neurosciences, Head-Neck and Orthopedics Sciences, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Francesco Lauriero
- Department of Radiological and Hematological Science, Section of Radiology, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Silvio Caravelli
- IRCCS Istituto Ortopedico Rizzoli—U.O.C. II Clinic of Orthopaedics and Traumatology, 40136 Bologna, Italy
| | - Massimiliano Mosca
- IRCCS Istituto Ortopedico Rizzoli—U.O.C. II Clinic of Orthopaedics and Traumatology, 40136 Bologna, Italy
| | - Giulio Maccauro
- Orthopedics and Trauma Surgery Unit, Department of Ageing, Neurosciences, Head-Neck and Orthopedics Sciences, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Tommaso Greco
- Orthopedics and Trauma Surgery Unit, Department of Ageing, Neurosciences, Head-Neck and Orthopedics Sciences, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Carlo Perisano
- Orthopedics and Trauma Surgery Unit, Department of Ageing, Neurosciences, Head-Neck and Orthopedics Sciences, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
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12
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de Cesar Netto C, Day J, Godoy-Santos AL, Roney A, Barbachan Mansur NS, Lintz F, Ellis SJ, Demetracopoulos CA. The use of three-dimensional biometric Foot and Ankle Offset to predict additional realignment procedures in total ankle replacement. Foot Ankle Surg 2022; 28:1029-1034. [PMID: 35190277 DOI: 10.1016/j.fas.2022.02.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/03/2022] [Accepted: 02/14/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Decision to perform associated corrective alignment procedures in patients undergoing total ankle replacement (TAR) is commonly made intraoperatively. The Foot and Ankle Offset (FAO) can evaluate multiplanar deformity and be an effective instrument in surgical planning. This study objective was to assess the ability of this tool to predict the need for additional realignment procedures at the time of TAR. METHODS In this retrospective study, we enrolled 21 patients who underwent TAR and had preoperative WBCT studies. Two independent and blinded observers calculated the preoperative FAO using dedicated software. FAO measurements were compared between the different alignment groups (physiological alignment, valgus and varus). A multivariate regression analysis was used to assess the correlation between performed realignment procedures and FAO values. RESULTS Mean preoperative FAO was 4.4% (95%CI = 1.4-7.5). The number of osseous realignment procedures needed was found to correlate positively and significantly with FAO (p = .001). The number of osseus procedures needed was significantly higher in patients with valgus malalignment (p = .009). Patients with valgus malalignment needing a medial column procedure had a relative risk of 6.3 when compared to varus malalignment patients (p = .02). CONCLUSION The number of additional bony realignment procedures performed at the time of TAR significantly correlated with preoperative FAO and that the number of osseus procedures needed was significantly higher in patients with valgus malalignment. Such biometric tools may enhance the preoperative assessment and surgical planning for patients undergoing TAR, with the potential to optimize surgical outcomes.
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Affiliation(s)
- Cesar de Cesar Netto
- University of Iowa, Department of Orthopaedics and Rehabilitation, 200 Hawkins Drive, Iowa City, IA 52242, USA.
| | - Jonathan Day
- Georgetown University, School of Medicine, Department of Orthopedics, Washington, DC, USA
| | - Alexandre Leme Godoy-Santos
- University of Sao Paulo, Department of Orthopaedics, Sao Paulo, SP, Brazil; Hospital Israelita Albert Einstein, Sao Paulo, SP, Brazil
| | - Andrew Roney
- Hospital for Special Surgery, New York, NY, USA; University of California Los Angeles, David Geffen School of Medicine, Los Angeles, CA, USA
| | - Nacime S Barbachan Mansur
- University of Iowa, Department of Orthopaedics and Rehabilitation, 200 Hawkins Drive, Iowa City, IA 52242, USA
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Does tibialis posterior dysfunction correlate with a worse radiographic overall alignment in progressive collapsing foot deformity? A retrospective study. Foot Ankle Surg 2022; 28:995-1001. [PMID: 35177330 DOI: 10.1016/j.fas.2022.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 01/24/2022] [Accepted: 02/10/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Posterior Tibial Tendon (PTT) dysfunction is considered to have an important role in Progressive Collapsing Foot Deformity (PCFD). The objective of our study was to assess the relationship between PTT status and three-dimensional foot deformity in PCFD. METHODS Records from 25 patients with PCFD were included for analysis. The PTT was considered deficient in patients with a positive single heel rise test or a deficit in inversion strength. Three-dimensional foot deformity was assessed using the Foot and Ankle Offset (FAO) from Weight-Bearing-CT imaging. Hindfoot valgus, midfoot abduction and medial longitudinal arch collapse were assessed on X-Rays using hindfoot moment arm, talonavicular coverage angle and Meary's angle respectively. Deland and Rosenberg MRI classifications were used to classify PTT degeneration. RESULTS PCFD with PTT deficit (13/25) had a mean FAO of 7.75 + /- 3.8% whereas PCFD without PTT deficit had a mean FAO of 6.68 + /- 3.9% (p = 0.49). No significant difference was found between these groups on the hindfoot moment arm and the talonavicular coverage angle (respectively p = 0.54 and 0.32), whereas the Meary's angle was significantly higher in case of PCFD with PTT deficit (p = 0.037). No significant association was found between PTT degeneration on MRI and FAO. CONCLUSION PCFD associated three-dimensional deformity, hindfoot valgus and midfoot abduction were not associated with PTT dysfunction. PTT dysfunction was only associated with a worse medial longitudinal arch collapse in our study. Considering our results, it does not appear that PTT is the main contributor to PCFD. LEVEL OF EVIDENCE Level III, Retrospective Comparative Study.
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14
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Day J, de Cesar Netto C, Burssens A, Bernasconi A, Fernando C, Lintz F. A Case-Control Study of 3D vs 2D Weightbearing CT Measurements of the M1-M2 Intermetatarsal Angle in Hallux Valgus. Foot Ankle Int 2022; 43:1049-1052. [PMID: 35502522 DOI: 10.1177/10711007221091812] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Weightbearing computed tomography (WBCT) 3-dimensional measurements may be reliable in assessing hallux valgus (HV). The objective of this study was to compare 2D and 3D WBCT measurements of the M1-M2 intermetatarsal angle (IMA) in patients with HV and in healthy controls. We hypothesized that 2D and 3D IMA measurements would correlate and have similar reliability in both HV and controls. METHODS Retrospective multicenter comparative study included WBCT scans from 83 feet (41 HV, 42 controls). IMA was measured on digitally reconstructed radiographs (DRR-IMA). 3D angle (3D-IMA) and its projection on the weightbearing plane (2D-IMA) were calculated from 3D coordinates of the first and second metatarsals. Intraobserver reliability and intermethod correlations were calculated using intraclass correlation coefficients (ICCs). RESULTS Intraobserver reliability was very strong for DRR-IMA (0.95) and 3D-IMA (0.99). Intermethod correlation between the 3 modalities in HV patients ranged from moderate (DRR vs 2D, 0.48; DRR vs 3D, 0.48) to very strong (2D vs 3D, 0.91). Similarly, intermethod correlation in the control group ranged from moderate (DRR vs 2D, 0.56; DRR vs 3D, 0.60) to very strong (2D vs 3D, 0.92). CONCLUSION Measurements for IMA are similar using DRR, 3D and 2D projected angles, with very strong intraobserver reliability and moderate to very strong intermethod correlations. This is the first head-to-head comparison between these measurement modalities in HV. Further investigations are warranted before formulating guidelines for the clinical use of 3D angles. LEVEL OF EVIDENCE Level III, case-control study.
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Affiliation(s)
- Jonathan Day
- Department of Orthopaedic Surgery, Georgetown University Medical Center, Washington, DC
| | - Cesar de Cesar Netto
- Department of Orthopedic Foot and Ankle Surgery, University of Iowa School of Medicine, Iowa City, IA, USA
| | - Arne Burssens
- Department of Orthopaedics, Kantonsspital Baselland, Liestal, Switzerland
| | - Alessio Bernasconi
- Frederico II University, Department of Orthopedic Surgery, Napoli, Italy
| | - Celine Fernando
- Foot and Ankle Surgery Center, Clinique de l'Union, Saint-Jean, France
| | - François Lintz
- Foot and Ankle Surgery Center, Clinique de l'Union, Saint-Jean, France
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15
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Bernasconi A, De Cesar Netto C, Siegler S, Jepsen M, Lintz F. Weightbearing CT assessment of foot and ankle joints in Pes Planovalgus using distance mapping. Foot Ankle Surg 2022; 28:775-784. [PMID: 34656445 DOI: 10.1016/j.fas.2021.10.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/04/2021] [Accepted: 10/06/2021] [Indexed: 02/04/2023]
Abstract
INTRODUCTION The goal of this study was to describe the abnormal joint surface interaction at the ankle, hindfoot and midfoot joints in patients presenting with Pes Planovalgus (PPV) using three-dimensional (3D) distance mapping on weightbearing computed tomography (WBCT) images by comparing a series of PPVs to a series of normally-aligned feet. We hypothesized that in PPVs joint interactions would reveal significantly increased spaces in the medial side of the ankle, hindfoot and midfoot joints. METHODS In this case-control study, ten feet (10 patients) with asymptomatic PPV were compared to 10 matched-paired (by age, gender and body mass index) normally-aligned feet (10 patients). 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 PPV patients there was a significantly increased surface-to-surface distance anteromedially at the ankle joint (+46.3%, p < 0.001) along with an increased distance on the anterior halves of both the medial (+21.3%, p = 0.098) and lateral malleoli (+22.7%, p = 0.038). At the posterolateral corner of the posterior facet of the subtalar joint we found an increased surface-to-surface distance (by 57.1%, p < 0.001), while at the talonavicular joint there was a reduction of the distance at the superomedial corner (-20%, p = 0.097) along with a significant increase in the upper central (+20%, p = 0.039) and lateral (+30.7%, p = 0.015) zones. A reduction of the surface-to-surface distance was also observed in three of the four zones of the calcaneocuboid joint. Finally, a statistically significant increase in the mean distance was observed at the naviculocuneiform and tarsometatarsal joints in a range between 38% and 93.4% (p < 0.001 in all cases). CONCLUSION We found significant differences in surface-to-surface interaction at the foot and ankle joints between Pes Planovalgus and normally-aligned controls. Distance mapping on WBCT images could be used in clinical practice as a diagnostic support to gauge the morphological changes of articular spaces occurring in Pes Planovalgus. LEVEL OF EVIDENCE Level III, case-control study.
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Affiliation(s)
- Alessio Bernasconi
- Orthopaedic and Traumatology Unit, University "Federico II", Naples, Italy.
| | - Cesar De Cesar Netto
- University of Iowa, Carver College of Medicine, Department of Orthopedics and Rehabilitation, Iowa City, IA, USA
| | | | | | - François Lintz
- Ramsay Générale de Santé Clinique de l'Union, Foot and Ankle Department, Toulouse, Occitanie, France
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16
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Comparison between Weightbearing-CT semiautomatic and manual measurements in Hallux Valgus. Foot Ankle Surg 2022; 28:518-525. [PMID: 35279395 DOI: 10.1016/j.fas.2022.02.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/11/2022] [Accepted: 02/19/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Radiographic measurements are an essential tool to determine the appropriate surgical treatment and outcome for Hallux Valgus (HV). HV deformity is best evaluated by weight-bearing computed tomography (WBCT). The objective was (1) to assess the reliability of WBCT computer-assisted semi-automatic imaging measurements in HV, (2) to compare semi-automatic with manual measurements in the setting of an HV, and (3) to compare semi-automatic measurements between HV and control group. METHODS In this retrospective IRB (ID# 201904825) approved study, we assessed patients with hallux valgus deformity. The sample size calculation was based on the hallux valgus angle (HVA). Thus to obtain the 0.8 power, including 26 feet with HV in this study, was necessary. Our control group consisted of 19 feet from 19 patients without HV. Raw multiplanar data was evaluated using software CubeVue®. In the axial plane, hallux valgus angle (HVA), intermetatarsal angle (IMA), and interphalangeal angle (IPA) were measured. The semiautomatic 3D measurements were performed using the Bonelogic®Software. Inter-rater reliabilities were performed using ICC. Agreement between methods was tested using the Bland-Altman plots. The difference between Patologic and Control cases using semi-automatic measurements was assessed with the Wilcoxon signed-rank test. Alpha risk was set to 5% (α = 0.05). P ≤ 0.05 were considered significant. RESULTS Reliabilities utilizing ICC were over 0.80 for WBCT manual measurements and WBCT semi-automatic readings. Inter and intraobserver agreement for Manual and Semi-automatic WBCT measurements demonstrated excellent reliability. CONCLUSIONS Semi-automatic measurements are reproducible and comparable to measurements performed manually. The software differentiated pathological from non-pathological conditions when subjected to semi-automatic measurements. The development of advanced semi-automatic segmentation software with minimal user intervention is essential for the establishment of big data and can be integrated into clinical practice, facilitating decision-making.
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Lôbo CFT, Pires EA, Bordalo-Rodrigues M, de Cesar Netto C, Godoy-Santos AL. Imaging of progressive collapsing foot deformity with emphasis on the role of weightbearing cone beam CT. Skeletal Radiol 2022; 51:1127-1141. [PMID: 34693455 DOI: 10.1007/s00256-021-03942-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/13/2021] [Accepted: 10/13/2021] [Indexed: 02/02/2023]
Abstract
The term progressive collapsing foot deformity (PCFD) is currently recommended as the replacement to adult-acquired flatfoot deformity and posterior tibial tendon dysfunction to better reflect its pathology, which consists of a complex three-dimensional deformity involving the foot and ankle. The new consensus has also provided a new classification that requires clinical and radiographic findings for patient stratification into each class. However, conventional radiographs are susceptible to errors resulting from the inadequate positioning of patients, incorrect angulation of the X-ray tube, and overlapping of bone structures. Weightbearing cone beam computed tomography (WBCBCT), which has greater diagnostic accuracy than conventional radiograph, is useful for evaluating progressive collapsing foot deformity to determine medial arch collapse, hindfoot alignment, peritalar subluxation, posterior subtalar joint valgus, intrinsic talus valgus, and lateral extra-articular bone impingement. The present review aimed to discuss the new recommendations for nomenclature, classification, and imaging evaluation of PCFD, with an illustrative and quantitative focus on the measurements used in conventional radiography and WBCBCT. The measurements presented here are important criteria for decision-making.
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Affiliation(s)
- Carlos Felipe Teixeira Lôbo
- Lab. Prof. Manlio Mario Marco Napoli, Faculdade de Medicina, Universidade de São Paulo, R. Ovidio Pires de Campos, 333, São Paulo, SP, 05403-010, Brazil.
| | - Eduardo Araújo Pires
- Lab. Prof. Manlio Mario Marco Napoli, Faculdade de Medicina, Universidade de São Paulo, R. Ovidio Pires de Campos, 333, São Paulo, SP, 05403-010, Brazil
| | - Marcelo Bordalo-Rodrigues
- Lab. Prof. Manlio Mario Marco Napoli, Faculdade de Medicina, Universidade de São Paulo, R. Ovidio Pires de Campos, 333, São Paulo, SP, 05403-010, Brazil.,Hospital Sírio Libanês, São Paulo, Brazil
| | - Cesar de Cesar Netto
- Department of Orthopedic Foot and Ankle Surgery, University of Iowa School of Medicine, Iowa City, IA, USA
| | - Alexandre Leme Godoy-Santos
- Lab. Prof. Manlio Mario Marco Napoli, Faculdade de Medicina, Universidade de São Paulo, R. Ovidio Pires de Campos, 333, São Paulo, SP, 05403-010, Brazil.,Hospital Israelita Albert Einstein, Av. Albert Einstein, 627, São Paulo, SP, 05652-900, Brazil
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18
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de Cesar Netto C, Ehret A, Walt J, Chinelati RMK, Dibbern K, de Carvalho KAM, Tazegul TE, Lalevee M, Mansur NSB. Early results and complication rate of the LapiCotton procedure in the treatment of medial longitudinal arch collapse: a prospective cohort study. Arch Orthop Trauma Surg 2022; 143:2283-2295. [PMID: 35312845 PMCID: PMC10110656 DOI: 10.1007/s00402-022-04399-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/14/2022] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Instability/collapse of the medial column has been associated with many conditions, particularly progressive collapsing foot deformity (PCFD), hallux valgus (HV), and midfoot arthritis (MA). Restoration of first ray length and sagittal plane alignment to restore the foot tripod is essential when treating these deformities. This study aimed to assess early results, healing, and complication rate of a distraction dorsal opening plantarflexion wedge allograft first tarsometatarsal joint fusion (LapiCotton Procedure) in patients with collapse/instability of the medial column. METHODS In this prospective cohort study, we included PCFD, HV, and MA patients that underwent a LapiCotton procedure. Fusion site healing was defined by > 50% bone bridging in both interfaces between allograft wedge and host bone using weight-bearing computed tomography (WBCT) after 3 months. First ray collapse radiographic correction and minor and major complications (deep dehiscence, deep infection, and reoperation) were assessed. RESULTS A total of 22 patients (22 feet) were included (11 PCFD, 6 MA, and 5 of HV patients). Mean follow-up was 5.9 months (range 3-12) and median allograft size was 8 mm (range 5-19 mm). Bone healing was observed in 91% of cases. Two minor complications (9%, both superficial dehiscence) and one major complication (4.5%, deep infection) were observed. Statistically significant improvement of the sagittal plane talus-first metatarsal angle was observed, with mean improvement of 9.4° (95% CI 6.7-12.1°; p < 0.0001). CONCLUSION In this prospective cohort study of 22 patients treated with the LapiCotton procedure for medial longitudinal arch collapse/instability, we observed a low complication rate (9% minor, 4.5% major), high healing rate after 3 months (91%), one clinically stable radiographic non-union (4.5%) and one unstable non-union (4.5%) needing reoperation. Our results demonstrate promising initial results for LapiCotton technique in treating collapse of the medial longitudinal arch in patients with PCFD, MA and HV deformities. Long-term results are needed to confirm these promising results. LEVEL OF EVIDENCE Level II, prospective cohort study.
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Affiliation(s)
- Cesar de Cesar Netto
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), 200 Hawkins Drive, Iowa City, IA, 52242, USA.
| | - Amanda Ehret
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), 200 Hawkins Drive, Iowa City, IA, 52242, USA
| | - Jennifer Walt
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), 200 Hawkins Drive, Iowa City, IA, 52242, USA
| | | | - Kevin Dibbern
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), 200 Hawkins Drive, Iowa City, IA, 52242, USA
| | - Kepler Alencar Mendes de Carvalho
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), 200 Hawkins Drive, Iowa City, IA, 52242, USA
| | - Tutku Erim Tazegul
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), 200 Hawkins Drive, Iowa City, IA, 52242, USA
| | - Matthieu Lalevee
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), 200 Hawkins Drive, Iowa City, IA, 52242, USA.,Department of Orthopedic Surgery, Rouen University Hospital, Rouen, France
| | - Nacime Salomão Barbachan Mansur
- Department of Orthopedics and Rehabilitation, Carver College of Medicine, University of Iowa (UIOWA), 200 Hawkins Drive, Iowa City, IA, 52242, USA.,Department of Orthopedics and Traumatology, Escola Paulista de Medicina, UNIFESP, São Paulo, Brazil
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Krähenbühl N, Kvarda P, Susdorf R, Burssens A, Ruiz R, Barg A, Hintermann B. Assessment of Progressive Collapsing Foot Deformity Using Semiautomated 3D Measurements Derived From Weightbearing CT Scans. Foot Ankle Int 2022; 43:363-370. [PMID: 34617817 DOI: 10.1177/10711007211049754] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND In progressive collapsing foot deformity (PCFD), hind- and midfoot deformities can be hard to characterize based on weightbearing plain radiography. Semiautomated 3-dimensional (3D) measurements derived from weightbearing computed tomography (WBCT) scans may provide a more accurate deformity assessment. In the present study, automated 3D measurements based on WBCT were used to compare hindfoot alignment of healthy individuals to patients with PCFD. METHODS The WBCT scans of 20 patients treated at our institution with either a flexible (N = 10) or rigid (N = 10) PCFD were compared with the WBCT scans of a control group of 30 healthy individuals. Using semiautomated image analysis software, from each set of 3D voxel images, we measured the talar tilt (TT), hindfoot moment arm (HMA), talocalcaneal angle (TCA; axial/lateral), talonavicular coverage (TNC), and talocalcaneal overlap (TCO). The presence of medial facet subluxation as well as sinus tarsi/subfibular impingement was additionally assessed. RESULTS With the exception of the TCA (axial/lateral), the analyzed measurements differed between healthy individuals and patients with PCFD. The TCA axial correlated with the TNC in patients with PCFD. An increased TCO combined with sinus tarsi impingement raised the probability of predicting a deformity as rigid. CONCLUSION Using 3D measurements, in this relatively small cohort of patients, we identified relevant variables associated with a clinical presentation of flexible or rigid PCFD. An increased TCO combined with sinus tarsi impingement raised the probability of predicting a deformity as rigid. Such WBCT-based markers possibly can help the surgeon in decision-making regarding the appropriate surgical strategy (eg, osteotomies vs realignment arthrodesis). However, prospective studies are necessary to confirm the utility of the proposed parameters in the treatment of PCFD. LEVEL OF EVIDENCE Level III, case-control study.
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Affiliation(s)
- Nicola Krähenbühl
- Department of Orthopaedics, University Hospital Basel, Basel, Switzerland
| | - Peter Kvarda
- Department of Orthopaedics, Kantonsspital Baselland, Liestal, Switzerland
| | - Roman Susdorf
- Department of Orthopaedics, Kantonsspital Baselland, Liestal, Switzerland
| | - Arne Burssens
- Department of Orthopaedics, Kantonsspital Baselland, Liestal, Switzerland
| | - Roxa Ruiz
- Department of Orthopaedics, Kantonsspital Baselland, Liestal, Switzerland
| | - Alexej Barg
- Department of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Department of Orthopaedics, University of Utah, Salt Lake City, UT, USA
| | - Beat Hintermann
- Department of Orthopaedics, Kantonsspital Baselland, Liestal, Switzerland
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Bakshi N, Steadman J, Philippi M, Arena C, Leake R, Saltzman CL, Barg A. Association Between Hindfoot Alignment and First Metatarsal Rotation. Foot Ankle Int 2022; 43:105-112. [PMID: 34350807 DOI: 10.1177/10711007211033514] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The association between forefoot and hindfoot position for planus and cavus feet is fundamental to the treatment of these deformities. However, no studies have evaluated the association between hindfoot alignment and first metatarsal (M1) axial rotation. Understanding this possible relationship may help to understand the deformity and improve patient care. The purpose of this study is to determine a correlation between hindfoot alignment and metatarsal rotation as assessed by weightbearing computed tomography (WBCT). METHODS Patients who underwent weightbearing plain radiography (WBPR) and WBCT between 2015 and 2018 were evaluated. Hindfoot alignment was measured with the calcaneal moment arm (CMA). M1 rotation was measured using the Kim and Saltzman angles. Patient subgroups were created according to the severity of valgus/varus hindfoot alignment. Statistical analyses were performed to evaluate for association between variables. RESULTS Among the 196 patient feet included in the study, the average CMA was 6.0 ± 16.2 mm. The average Kim and Saltzman angles were 7.7 ± 12.9 degrees and 2.8 ± 13.1 degrees, respectively. The average Meary angle was 182.0 ± 11.9 degrees. A moderately strong association was found between the CMA and the Saltzman (r = 0.641, P < .01) and Kim angles (r = 0.615, P < .01). Hindfoot valgus was associated with M1 pronation and hindfoot varus with M1 supination. Additionally, inverse relationships between the Meary angle and the Saltzman (r = -0.600, P < .01) and Kim angles (r = -0.529, P < .01) were identified. CONCLUSION In this well-defined cohort, we found substantial correlation between hindfoot alignment and M1 rotation. Hindfoot valgus was associated with M1 pronation, and hindfoot varus was associated with M1 supination. Surgeons correcting cavovarus/planovalgus deformities should be aware of this association and evaluate the need for first-ray derotation. LEVEL OF EVIDENCE Level III, retrospective cohort study.
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Affiliation(s)
- Neil Bakshi
- Department of Orthopaedics, University of Utah, Salt Lake City, UT, USA
| | - Jesse Steadman
- Department of Orthopaedics, University of Utah, Salt Lake City, UT, USA
| | - Matthew Philippi
- Department of Orthopaedics, University of Utah, Salt Lake City, UT, USA
| | - Christopher Arena
- Orthopedic Sports Institute, Institute for Orthopedic Research & Innovation, Coeur d'Alene, ID, USA
| | - Richard Leake
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA
| | | | - Alexej Barg
- Department of Orthopaedics, University of Utah, Salt Lake City, UT, USA.,Department of Orthopaedics, Trauma and Reconstructive Surgery, University of Hamburg, Hamburg, Germany
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Arena CB, Sripanich Y, Leake R, Saltzman CL, Barg A. Assessment of Hindfoot Alignment Comparing Weightbearing Radiography to Weightbearing Computed Tomography. Foot Ankle Int 2021; 42:1482-1490. [PMID: 34109833 DOI: 10.1177/10711007211014171] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Hindfoot alignment view (HAV) radiographs are widely utilized for 2-dimensional (2D) radiographic assessment of hindfoot alignment; however, the development of weightbearing computed tomography (WBCT) may provide more accurate methods of quantifying 3-dimensional (3D) hindfoot alignment. The aim of this study was to compare the 2D calcaneal moment arm measurements on HAV radiographs with WBCT. METHODS This retrospective cohort study included 375 consecutive patients with both HAV radiographs and WBCT imaging. Measurement of the 2D hindfoot alignment moment arm was compared between both imaging modalities. The potential confounding influence of valgus/varus/neutral alignment, presence of hardware, and motion artifact were further analyzed. RESULTS The intraclass correlation coefficients (ICCs) of interobserver and intraobserver reliability for measurements with both imaging modalities were excellent. Both modalities were highly correlated (Spearman coefficient, 0.930; P < .001). HAV radiographs exhibited a mean calcaneal moment arm difference of 3.9 mm in the varus direction compared with WBCT (95% CI, -4.9 to 12.8). The difference of hindfoot alignment between both modalities was comparable in subgroups with neutral/valgus/varus alignment, presence of hardware, and motion artifact. CONCLUSION Both HAV radiographs and WBCT are highly reliable and highly correlated imaging methods for assessing hindfoot alignment. Measurements were not influenced by severe malalignment, the presence of hardware, or motion artifact on WBCT. On average, HAV radiographs overestimated 3.9 mm of varus alignment as compared with WBCT. LEVEL OF EVIDENCE Level III, retrospective comparative study.
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Affiliation(s)
- Christopher B Arena
- Department of Orthopaedics, University of Utah, Salt Lake City, UT, USA.,Orthopedic Sports Institute, Institute for Orthopedic Research & Innovation, Coeur d'Alene, ID, USA
| | - Yantarat Sripanich
- Department of Orthopaedics, University of Utah, Salt Lake City, UT, USA.,Department of Orthopaedics, Phramongkutklao Hospital and College of Medicine, Tung Phayathai, Ratchathewi, Bangkok, Thailand
| | - Richard Leake
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT, USA
| | | | - Alexej Barg
- Department of Orthopaedics, Trauma and Reconstructive Surgery, University of Hamburg, Hamburg, Germany
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22
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Day J, de Cesar Netto C, Richter M, Mansur NS, Fernando C, Deland JT, Ellis SJ, Lintz F. Evaluation of a Weightbearing CT Artificial Intelligence-Based Automatic Measurement for the M1-M2 Intermetatarsal Angle in Hallux Valgus. Foot Ankle Int 2021; 42:1502-1509. [PMID: 34088236 DOI: 10.1177/10711007211015177] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Weightbearing cone beam computed tomography (WBCT) has been gaining traction as a useful imaging modality in the diagnosis and follow-up of foot and ankle musculoskeletal pathologies due to the ability to perform quick, low-dose, 3-dimensional (3D) scans. However, the resulting wealth of 3D data renders daily clinical use time-consuming. The aim of this study was to evaluate a new artificial intelligence (AI)-based automatic measurement for the M1-M2 intermetatarsal angle (IMA) in hallux valgus (HV). We hypothesized that automatic and manual measurements would have a strong correlation, and that the AI software would yield better reproducibility and would be faster compared with manual measurements. METHODS This was a multicenter retrospective comparative case-control study in which a total of 128 feet were included from 93 patients who underwent WBCT scans as part of their routine follow-up: 59 feet with symptomatic HV and 69 controls. The IMA was measured automatically using the AI software and manually on digitally reconstructed radiographs (DRRs). The AI software produced both an automatic 2D (auto 2D) and 3D (auto 3D) measurement. RESULTS There were strong intermethod correlations between the DRR IMA and the auto 2D (HV, r = 0.61; control, r = 0.60; all P < .0001) and auto 3D (HV, r = 0.63; control, r = 0.52; all P < .0001) measurements, respectively. The intrasoftware reproducibility was very close to 100%. Measurements took 23.6 ± 2.31 seconds and 14.5 ± 1.18 seconds, respectively, when taken manually on DRRs and automatically. Controls demonstrated a mean DRR IMA of 8.6 (95% CI, 8.1-9.1), mean auto 2D of 11.2 (95% CI, 10.7-11.7), and mean auto 3D IMA of 11.0 (95% CI, 10.5-11.5). The HV group demonstrated significantly increased IMA compared with controls (P < .0001), with a mean DRR IMA of 15.4 (95% CI, 14.8-16.1), mean auto 2D of 17.8 (95% CI, 17.2-18.4), and mean auto 3D IMA of 16.8 (95% CI, 16.8-17.4). CONCLUSION Measurements generated by the WBCT AI-based automatic measurement system for IMA demonstrated strong correlations with manual measurements, with near-perfect reproducibility. Further developments are warranted in order to make this tool more usable in daily practice, particularly with respect to its use in the presence of hardware in the foot. LEVEL OF EVIDENCE Level III, retrospective comparative study.
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Affiliation(s)
- Jonathan Day
- Hospital for Special Surgery, New York, NY, USA.,Department of Orthopaedic Surgery, MedStar Georgetown University Hospital, Washington, DC, USA
| | - Cesar de Cesar Netto
- Department of Orthopedic Foot and Ankle Surgery, University of Iowa School of Medicine, Iowa City, IA, USA
| | - Martinus Richter
- Department for Foot and Ankle Surgery, Nuremberg and Rummelsberg, Schwarzenbruck, Germany
| | - Nacime Salomao Mansur
- Department of Orthopedic Foot and Ankle Surgery, University of Iowa School of Medicine, Iowa City, IA, USA
| | - Celine Fernando
- Foot and Ankle Surgery Center, Clinique de l'Union, Saint-Jean, France
| | | | | | - François Lintz
- Foot and Ankle Surgery Center, Clinique de l'Union, Saint-Jean, France
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23
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Abstract
Advanced imaging modalities have, in very recent years, enabled a considerable leap in understanding progressive collapsing foot deformity, evolving from a simple confirmation of clinical diagnostic using basic measurements to minute understanding of soft tissue and bone involvements. MRI and weight-bearing cone-beam computed tomography are enabling the development of new 3-dimensional measurement modalities. The identification of key articular and joint markers of advanced collapse will allow surgeons to better indicate treatments and assess chances of success with conservative therapies and less invasive surgical procedures, with the hope of improving patient outcomes.
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24
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Angular and linear measurements of adult flexible flatfoot via weight-bearing CT scans and 3D bone reconstruction tools. Sci Rep 2021; 11:16139. [PMID: 34373546 PMCID: PMC8352889 DOI: 10.1038/s41598-021-95708-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/28/2021] [Indexed: 12/14/2022] Open
Abstract
Acquired adult flatfoot is a frequent deformity which implies multiple, complex and combined 3D modifications of the foot skeletal structure. The difficult thorough evaluation of the degree of severity pre-op and the corresponding assessment post-op can now be overcome by cone-beam (CBCT) technology, which can provide access to the 3D skeletal structure in weight-bearing. This study aims to report flatfoot deformities originally in 3D and in weight-bearing, with measurements taken using two different bone segmentation techniques. 21 such patients, with indication for surgical corrections, underwent CBCT (Carestream, US) while standing on one leg. From these scans, 3D models of each bone of the foot were reconstructed by using two different state-of-the-art segmentation tools: a semi-automatic (Mimics Innovation Suite, Materialise, Belgium), and an automatic (Bonelogic Ortho Foot and Ankle, Disior, Finland). From both reconstructed models, Principal Component Analysis was used to define anatomical reference frames, and original foot and ankle angles and other parameters were calculated mostly based on the longitudinal axis of the bones, in anatomical plane projections and in 3D. Both bone model reconstructions revealed a considerable valgus of the calcareous, plantarflexion and internal rotation of the talus, and typical Meary’s angles in the lateral and transverse plane projections. The mean difference from these angles between semi-automatic and automatic segmentations was larger than 3.5 degrees for only 3 of the 32 measurements, and a large number of these differences were not statistically significant. CBCT and the present techniques for bone shape reconstruction finally provide a novel and valuable 3D assessment of complex foot deformities in weight-bearing, eliminating previous limitations associated to unloaded feet and bidimensional measures. Corresponding measurements on the bone models from the two segmentation tools compared well. Other more representative measurements can be defined in the future using CBCT and these techniques.
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25
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Auch E, Barbachan Mansur NS, Alexandre Alves T, Cychosz C, Lintz F, Godoy-Santos AL, Baumfeld DS, de Cesar Netto C. Distal Tibiofibular Syndesmotic Widening in Progressive Collapsing Foot Deformity. Foot Ankle Int 2021; 42:768-775. [PMID: 33508965 DOI: 10.1177/1071100720982907] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Lateral overload in progressive collapsing foot deformity (PCFD) takes place as hindfoot valgus, peritalar subluxation, and valgus instability of the ankle increase. Fibular strain due to chronic lateral impingement may lead to distraction forces over the distal tibiofibular syndesmosis (DTFS). This study aimed to assess and correlate the severity of the foot and ankle offset (FAO) as a marker of progressive PCFD with the amount of DTFS widening and to compare it to controls. METHODS In this case-control study, 62 symptomatic patients with PCFD and 29 controls who underwent standing weightbearing computed tomography (WBCT) examination were included. Two fellowship-trained blinded orthopedic foot and ankle surgeons performed FAO (%) and DTFS area measurements (mm2). DTFS was assessed semiautomatically on axial-plane WBCT images, 1 cm proximal to the apex of the tibial plafond. Values were compared between patients with PCFD and controls, and Spearman correlation between FAO and DTFS area measurements was assessed. P values of less than .05 were considered significant. RESULTS Patients with PCFD demonstrated significantly increased FAO and DTFS measurements in comparison to controls. A mean difference of 6.9% (P < .001) in FAO and 10.4 mm2 (P = .026) in DTFS was observed. A significant but weak correlation was identified between the variables, with a Þ of 0.22 (P = .03). A partition predictive model demonstrated that DTFS area measurements were highest when FAO values were between 7% and 9.3%, with mean (SD) values of 92.7 (22.4) mm2. CONCLUSION To our knowledge, this was the first study to assess syndesmotic widening in patients with PCFD. We found patients with PCFD to demonstrate increased DTFS area measurements compared to controls, with a mean difference of approximately 10 mm2. A significantly weak positive correlation was found between FAO and DTFS area measurements, with the highest syndesmotic widening occurring when FAO values were between 7% and 9.3%. Our study findings suggest that chronic lateral impingement in patients with PCFD can result in a negative biomechanical impact on syndesmotic alignment, with increased DTFS stress and subsequent widening. LEVEL OF EVIDENCE Level III, retrospective comparative study.
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Affiliation(s)
- Elijah Auch
- Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
| | - Nacime Salomao Barbachan Mansur
- Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USA.,Federal University of São Paulo, São Paulo, Brazil
| | | | - Christopher Cychosz
- Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
| | | | | | | | - Cesar de Cesar Netto
- Department of Orthopedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
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26
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Abstract
Undiagnosed medial ankle instability can be a prerequisite for pathogenic progression in the foot, particularly for adult acquired flatfoot deformity. With the complex anatomy in this region, and the limitations of each individual investigational method, accurately identifying peritalar instability remains a serious challenge to clinicians. Performing a thorough clinical examination aided by evaluation with advanced imaging can improve the threshold of detection for this condition and allow early proper treatment to prevent further manifestations of the instability.
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Affiliation(s)
- Yantarat Sripanich
- Department of Orthopaedics, University of Utah, 590 Wakara Way, Salt Lake City, UT 84108, USA; Department of Orthopaedics, Phramongkutklao Hospital and College of Medicine, 315 Rajavithi Road, Tung Phayathai, Ratchathewi, Bangkok 10400, Thailand
| | - Alexej Barg
- Department of Orthopaedics, University of Utah, 590 Wakara Way, Salt Lake City, UT 84108, USA; Department of Orthopaedics, Trauma and Reconstructive Surgery, University of Hamburg, Martinistr. 52, Hamburg 20246, Germany.
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27
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Rojas EO, Barbachan Mansur NS, Dibbern K, Lalevee M, Auch E, Schmidt E, Vivtcharenko V, Li S, Phisitkul P, Femino J, de Cesar Netto C. Weightbearing Computed Tomography for Assessment of Foot and Ankle Deformities: The Iowa Experience. THE IOWA ORTHOPAEDIC JOURNAL 2021; 41:111-119. [PMID: 34552412 PMCID: PMC8259196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
BACKGROUND Weightbearing computed tomography (WBCT) is a reliable and precise modality for the measurement and analysis of bone position in the foot and ankle, as well as associated deformities. WBCT to assess three dimensional relationships among bones allowed the development of new measurements, as the Foot and Ankle Offset (FAO), which has high inter and intra-rater reliability. This study reports the University of Iowa's experience utilizing WBCT for the care of foot and ankle patients by describing its utility across different orthopedic diseases in improving diagnostic assessment, aiding surgical planning, and expanding the use for objective clinical follow-up. METHODS The medical records of consecutive patients with various foot and ankle disorders that underwent WBCT examination as part of the standard of care at a single institution between November 2014 and August 2020 were retrospectively reviewed. Patient factors, including body mass index (BMI), sex, and patient comorbidities were collected. 3D coordinates for calculation of FAO were harvested using the Multiplanar Reconstruction (MPR) views were calculated from the obtained exams. Descriptive statistics were performed with Shapiro-Wilk test and the Anderson-Darling tests. RESULTS 1175 feet and ankles (820 patients) had a WBCT performed over the studied 68 months. 53% of the subjects were male and 47% female. 588 of the acquisitions were from the right side (50.04%) and 587 from the left side (49.96%). Diabetes was present in 15.47% of, Rheumatic diagnoses in 4.52% and smoking habits in 44.10% of patients. Mean BMI of the sample was found to be 32.47 (32.03-32.90, 95% CI). The mean Foot and Ankle Offset (FAO) encountered in the study's population was 2.43 (2.05-2.82, 95% CI; min -30.8, max 37.65; median 2.39). CONCLUSION This study contains the largest cohort of WBCTs with accompanied FAO measurements to date, which can aid with establishing a new baseline FAO measurement for multiple pathological conditions. Acquiring WBCTs resulted in a variety of more specific diagnoses for patient with foot and ankle complaints. The ability to utilize WBCT for presurgical planning, the capability to provide a 3D reconstruction of patient anatomy, and its use for assessment of advanced relational foot and ankle measurements, such as FAO, demonstrate how WBCT may serve as a remarkable utility in clinical practice and has become a standard of care in our practice at the University of Iowa.Level of Evidence: IV.
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Affiliation(s)
- Edward O. Rojas
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
| | | | - Kevin Dibbern
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
| | - Matthieu Lalevee
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
| | - Elijah Auch
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
| | - Eli Schmidt
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
| | - Victoria Vivtcharenko
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
| | - Shuyuan Li
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
| | | | - John Femino
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
| | - Cesar de Cesar Netto
- Department of Orthopedics and Rehabilitation, University of Iowa Hospitals & Clinics, Iowa City, Iowa, USA
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28
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de Cesar Netto C, Myerson MS, Day J, Ellis SJ, Hintermann B, Johnson JE, Sangeorzan BJ, Schon LC, Thordarson DB, Deland JT. Consensus for the Use of Weightbearing CT in the Assessment of Progressive Collapsing Foot Deformity. Foot Ankle Int 2020; 41:1277-1282. [PMID: 32851880 DOI: 10.1177/1071100720950734] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
RECOMMENDATION There is evidence that the use of WEIGHTBEARING imaging aids in the assessment of progressive collapsing foot deformity (PCFD). The following WEIGHTBEARING conventional radiographs (CRs) are necessary in the assessment of PCFD patients: anteroposterior (AP) foot, AP or mortise ankle, and lateral foot. If available, a hindfoot alignment view is strongly recommended. If available, WEIGHTBEARING computed tomography (CT) is strongly recommended for surgical planning. When WEIGHTBEARING CT is obtained, important findings to be assessed are sinus tarsi impingement, subfibular impingement, increased valgus inclination of the posterior facet of the subtalar joint, and subluxation of the subtalar joint at the posterior and/or middle facet. LEVEL OF EVIDENCE Level V, consensus, expert opinion.
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Affiliation(s)
- Cesar de Cesar Netto
- Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, IA, USA
| | - Mark S Myerson
- Department of Orthopedic Surgery, University of Colorado School of Medicine, Aurora, CO, USA
| | | | | | | | | | | | - Lew C Schon
- Mercy Medical Center, Baltimore, MD, USA.,New York University Grossman School of Medicine, New York, NY, USA.,Johns Hopkins School of Medicine, Baltimore, MD, USA.,Georgetown School of Medicine, Washington, DC, USA
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