Early Tibiotalar Joint Changes Following Subtalar Arthrodesis for Progressive Collapsing Foot Deformity: A 3D Distance Mapping Short Scientific Report.

Background: Subtalar joint (SJ) fusion may be required to treat subtalar osteoarthritis in progressive collapsing foot deformity (PCFD). Our goal was to understand how anterolateral arthroscopic subtalar arthrodesis (ALAPSTA) may alter joint congruency at the tibiotalar level.

Methods: We retrospectively assessed pre- and postoperative weightbearing computed tomography images of patients diagnosed with PCFD 2A (arthritic SJ) and/or 2D (peritalar subluxation) which underwent isolated ALAPSTA.

Valgus Deviation of the Intersesamoid Crista in Hallux Valgus and Its Association With the Distal Metatarsal Articular Angle: A Pilot Study.

Background: In hallux valgus (HV), the sesamoid bones embedded in the distal tendon of the flexor hallucis brevis and surrounding the tendon of the flexor hallucis longus are partially guided beneath the head of the first metatarsal (M1) by the intersesamoid crista. The distal metatarsal articular angle (DMAA) assesses the valgus deviation of M1 distal articular surface but is influenced by the pronation of the M1 head relative to the ground. Currently, it is unknown whether the intersesamoid crista itself deviates in valgus in association with the articular surface, and understanding this relationship may have clinical relevance for both the pathogenesis of hallux valgus and its surgical correction.

Minimally Invasive Distal Chevron With Supination Corrects First Metatarsal Pronation in Hallux Valgus: A Retrospective Weightbearing Computed Tomography Study.

Background: Hallux valgus (HV) significantly impacts patients' quality of life. The coronal plane deformity is often not captured by traditional 2-dimensional radiographs, yet its correction may be important. This study explores the efficacy of distal chevron osteotomies with supination in correcting first metatarsal (M1) pronation in HV.

Endoscopic Anterolateral Ligament Reconstruction Using an Iliotibial Band Strip: A Cadaveric Feasibility Study.

Introduction This study introduces an innovative, minimally invasive technique for reconstructing the anterolateral ligament of the knee. The approach involves harvesting a fascia lata band strip proximally to the lateral epicondyle (LE), thereby avoiding distal dissection. This method may replicate the function of Kaplan's fibers by preserving a broad tibial insertion, potentially improving tibial rotational control.

Comparison of fore- and midfoot angles using 3DCT in standard weightbearing and sesamoid view position in feet with hallux valgus.

Aims: To evaluate how fore- and midfoot coronal plane alignment differs in feet with hallux valgus (HV), using 3DCT when measured in standard weightbearing (SWB) versus sesamoid view (SV) position, and to determine whether first metatarsophalangeal (MTP) dorsiflexion affects the relationship between the first metatarsal (M1) head and the sesamoid bones.

Methods: A consecutive series of 34 feet that underwent 3DCT in SWB and SV positions for symptomatic HV was assessed, of which four feet were excluded for distorted or incomplete images. Two foot and ankle clinicians independently digitized a series of points, and measured a series of angles according to a pre-defined protocol.

Coronal Plane Alignment of the Medial Column in Isolated Hallux Valgus, Isolated Flatfoot, and Combined Hallux Valgus-Flatfoot.

Background: To provide improved treatment for hallux valgus (HV), we sought to understand more about the pathophysiologic connection between flatfoot deformity and HV by comparing coronal plane alignment of the medial column of the foot for patients with isolated HV, isolated flatfoot, and combined HV-flatfoot vs controls.

Methods: This study retrospectively assessed a consecutive series of 33 patients with combined symptomatic and radiographic HV and flatfoot, 33 isolated symptomatic HV, 33 isolated symptomatic flatfoot, and 33 controls. The medial column alignment was assessed in the coronal plane using 3-dimensional weightbearing computed tomography (WBCT); rotation was measured for the navicular, medial cuneiform, and first metatarsal (M1).

Does Decompressive Chevron Osteotomy Decrease Subchondral Bone Density of the First Metatarsophalangeal Joint in Hallux Rigidus?

Background: To investigate the impact of decompressive chevron osteotomy on subchondral bone density at the first metatarsophalangeal (MTP) joint.

Methods: Sixteen feet (12 patients) with hallux rigidus underwent decompressive chevron osteotomy. Standing cone beam 3D computed tomography (3DCT) were assessed preoperatively and at 4-month follow-up, and clinical data were collected.

Recurrence rates with long-term follow-up after hallux valgus surgical treatment using shaft metatarsal osteotomies: a systematic review and meta-analysis.

Purpose: Recurrence of hallux valgus (HV) following corrective surgery is a frequent concern. A recent systematic review estimated recurrence of HV in only 4.9%, which may be an underestimation, as most included studies had short- to mid-term follow-up.

Spontaneous Reduction in the Intermetatarsal Angle in Distal First Metatarsal Osteotomies with No Lateral Head Displacement in Hallux Valgus.

Background: The outcomes of first metatarsal (M1) distal osteotomies in hallux valgus (HV) can be improved, especially for intermetatarsal angle (IMA) correction, which is mainly based on lateral displacement of the M1 head (i.e., translation) through the osteotomy.

Correction of progressive collapsing foot deformity classes after isolated arthroscopic subtalar arthrodesis.

Introduction: Subtalar osteoarthritis in the context of flatfoot (recently renamed Progressive Collapsing Foot Deformity (PCFD)) may be treated through subtalar joint (SJ) arthrodesis with anticipated consequences on three-dimensional bony configuration. This study investigates the correction of PCFD-related deformities achieved after Anterolateral Arthroscopic Subtalar Arthrodesis (ALAPSTA).

Methods: In this retrospective study, we evaluated pre- and post-operative (at 6 months) weight bearing computed tomography (WBCT) images of patients diagnosed with PCFD with a degenerated SJ (2 A according to PCFD classification) and/or peritalar subluxation (2D) with or without associated flexible midfoot and/or forefoot deformities (1B, 1 C and 1E) which underwent ALAPSTA as a standalone procedure between 2017 and 2020.

Proximal row carpectomy versus four-corner arthrodesis: a retrospective comparative study.

Background: Four-corner arthrodesis with scaphoid excision (FCA) and proximal row carpal resection (PRC) are frequently performed in wrists with post-traumatic Scaphoid Non- Union Advanced Collapse (SNAC)/Scapho-Lunate Advanced Collapse (SLAC) osteoarthritis. The aim of this study was to compare the clinical outcomes of these two procedures.

Methods: This single-center, retrospective cohort study included all patients who had PRC or FCA between January 1st, 2009 and January 1st, 2019 and who were followed up.

Risk Factors for Midfoot Arthritis Associated With Medical History by Weight Bearing Computed Tomography.

Tarso-metatarsal joints and naviculocuneiform joints comprising midfoot is the second most commonly involved joints following the first metatarsophalangeal joint in the foot. However, related factors of midfoot arthritis (MA) have been rarely reported. The bony structure and alignment can be more precisely assessed using Weight-Bearing Computed Tomography (WBCT) than conventional radiographs.

Ultrasound identification of hand and wrist anatomical structures by hand surgeons new to ultrasonographic techniques.

Purpose: Ultrasound is becoming an essential tool for hand surgeons, but most of them are trained on the job, without any diploma or dedicated training. The aim of this study was to assess the ability of hand surgeons new to ultrasound to identify hand and wrist anatomical structures.

Methods: A monocentric study was conducted from January 2022 to April 2022.

Influence of Skin Marker Positioning and Their Combinations on Hip Joint Center Estimation Using the Functional Method.

Accurate estimation of hip joint center (HJC) position is crucial during gait analysis. HJC is obtained with predictive or functional methods. But in the functional method, there is no consensus on where to place the skin markers and which combination to use.

Prevalence of midfoot arthritis and lesser toe deformities.

Background: The aim of this study was to investigate the epidemiology of Midfoot Arthritis (MA) and Lesser toe deformity (LTD) using Weight-Bearing Computed Tomography (WBCT).

Methods: 606 cases (247 male, 359 female) among 1316 consecutive cases with WBCT data from September 2014 to April 2022 were retrospectively reviewed at a single referral institution. The Cochran-Armitage test was performed to evaluate the trend of prevalence with respect to age group and obesity classification.

Deformities Influencing Different Classes in Progressive Collapsing Foot.

Background: The current classification system of progressive collapsing foot deformity (PCFD) is comprised of 5 possible classes. PCFD is understood to be a complex, three-dimensional deformity occurring in many regions along the foot and ankle. The question remains whether a deformity in one area impacts other areas.

The Role of the Transverse Arch in Progressive Collapsing Foot Deformity.

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).

Relationship Between Obesity and Medial Longitudinal Arch Bowing.

Background: There have been reports about the association between obesity and the medial longitudinal arch (MLA) of foot. The purpose of this study is to investigate the change of various parameters related to the MLA according to obesity classification severity by the World Health Organization using weightbearing computed tomography (WBCT).

Methods: WBCT data of the noninvolved side of patients presenting with unilateral foot and ankle problems or healthy candidates from September 2014 to October 2022 were extracted from a single referral hospital.

Decreased Peritalar Subluxation in Progressive Collapsing Foot Deformity with Ankle Valgus Tilting.

Background: Middle facet subluxation (MFS) has been established as an early indicator of peritalar subluxation. However, when progressive collapsing foot deformity (PCFD) affects the ankle leading to a valgus talar tilt (Class E), structures and anatomic relationships distal to the ankle joint may be affected. Therefore, this study aimed to assess radiographic parameters of peritalar subluxation in patients with PCFD who either did or did not have a valgus ankle.

Effect of Peritalar Subluxation Correction for Progressive Collapsing Foot Deformity on Patient-Reported Outcomes.

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.

Validation of an Automated Optical Scanner for a Comprehensive Anthropometric Analysis of the Foot and Ankle.

Our objective was to conduct a comprehensive analysis of the reproducibility of foot and ankle anthropometric measurements with a three-dimensional (3D) optical scanner. We evaluated thirty-nine different anthropometric parameters obtained with a 3D Laser UPOD-S Full-Foot Scanner in a healthy population of twenty subjects. We determined the variance of the measurements for each foot/ankle, and the average variance among different subjects.

Distribution, prevalence, and impact on the metatarsosesamoid complex of first metatarsal pronation in hallux valgus.

Background: Previous simulated weight-bearing CT (WBCT) studies classifying first metatarsal (M1) pronation suggested a high prevalence of M1 hyper-pronation in hallux valgus (HV). These findings have prompted a marked increase in M1 supination in HV surgical correction. No subsequent study confirms these M1 pronation values, and two recent WBCT investigations suggest lower normative M1 pronation values.

Advantages of ultrasound identification of the distal insertion of the calcaneofibular ligament during ligament reconstructions.

Introduction: In lateral ankle instability, anatomical ligament reconstructions are generally performed using arthroscopy. The ligament graft is passed through the talar, fibular and calcaneal tunnels, reconstructing the anterior talofibular and calcaneofibular (CFL) bundles. However, the calcaneal insertion of the CFL needs to be performed in an extra-articular fashion, and cannot be carried out under arthroscopy, thus requiring specific anatomical landmarks.

Assessment of the Efficiency of Measuring Foot and Ankle Edema with a 3D Portable Scanner.

To prospectively evaluate the reliability of a portable optical scanner compared to the water displacement technique for volumetric measurements of the foot and ankle and to compare the acquisition time associated with these two methods. Foot volume was measured in 29 healthy volunteers (58 feet, 24 females and 5 males) by a 3D scanner (UPOD-S 3D Laser Full-Foot Scanner®) and by water displacement volumetry. Measurements were performed on both feet, up to a height of 10 cm above the ground.