Publications by authors named "Guilherme Honda Saito"

Background: Some children and adolescents can develop persistent pain and instability following inversion injuries of the ankle. In these cases, imaging exams could reveal small bone fragments distal to the lateral malleolus. For these patients, regular conservative treatment may not be successful, requiring additional management, which can include surgical treatment.

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Article Synopsis
  • Up to 20% of patients with an ankle sprain may develop chronic lateral ankle instability (CLAI), potentially necessitating surgery like the Brostrom-Gould technique (BGT).
  • A study of 79 non-athlete patients showed significant improvements in function post-surgery, with AOFAS scores rising from 64.6 to 97.2, and 77.2% returning to their preinjury sports activities.
  • Despite these improvements, some patients experienced residual pain and symptoms of instability, which affected their ability to engage fully in physical activities.
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This study reports the clinical outcomes and evolution of 4 patients with subungual glomus tumor (GT) of the hallux treated with tumor excision. Preoperatively, all patients had pain of intensity 9 or 10. Three were sensitive to cold and had stabbing pain, and one reported pulsatile pain.

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Purpose: Based on the tripod concept of load distribution, our study aimed to evaluate whether a slight extension of first metatarsal (M1) that may occur after the Lapidus procedure (LP) could alter the radiographic measurements of the hindfoot and influence clinical and functional outcomes.

Methods: Twenty-five patients (27 feet) were reviewed. Hindfoot radiographic analysis was based on seven measurements.

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Background: The aim of this study was to compare the clinical, functional and radiographic outcomes in patients who underwent the original Lapidus procedure (OLP) with fusion and undesired non-fusion between the first (M1) and second (M2) metatarsals.

Methods: A retrospective and comparative analysis of 29 patients (38 feet) who underwent the OLP was performed. They were divided in two groups: (1) 23 feet in which fusion occurred and (2) 15 with undesired non-fusion.

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Purpose: This study aimed to evaluate the effect of variations in bony and soft tissue foot widths on clinical and functional outcomes after hallux valgus correction with the Lapidus procedure.

Methods: Forty-three feet in 35 patients with a mean follow-up of 18.5 months undergoing the LP were reviewed.

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The modified Lapidus procedure (MLP), which consists of fusion between the first metatarsal (M1) and medial cuneiform, has been widely performed with satisfactory clinical outcomes, but it has a variable nonunion rate ranging between 4% and 10% and loss of correction in up to 5.8% of the cases. Excessive motion around the site of tarsometatarsal arthrodesis, specially at the intercuneiform joint, is probably the reason.

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 To evaluate the results obtained from the surgical treatment of malleolar ankle fractures associated with distal tibiofibular syndesmosis (DTFS) injury submitted to conventional surgical procedure for fracture fixation and DTFS fixation by suture button (SB).  Forty-nine patients were retrospectively evaluated, with a mean age of 45 years old and a mean follow-up of 34.1 months.

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Background: Patients undergoing total ankle replacement (TAR) often have symptomatic adjacent joint arthritis and deformity. Subtalar arthrodesis can effectively address a degenerative and/or malaligned hindfoot, but there is concern that it places abnormal stresses on the TAR and adjacent joints of the foot, potentially leading to early TAR failure. This study hypothesized that ankle and talonavicular joint kinematics would be altered after subtalar arthrodesis in the setting of TAR.

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Background: The purpose of this study was to evaluate the effect of the variation of the first metatarsal (M1) sagittal alignment after the Lapidus procedure (LP) on clinical and functional outcomes, and transfer metatarsalgia.

Methods: Twenty-nine patients who underwent a LP, with a mean follow-up of 20 months, were reviewed. Radiographic, clinical and functional measurements were compared.

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Objective: To correlate first metatarsal (M1) shortening with transfer metatarsalgia, and clinical and functional outcomes in patients who underwent the Lapidus procedure (LP).

Materials And Methods: A retrospective review of 29 patients who were submitted to the LP for HV correction. The average follow-up was 20 months.

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Introduction: To present the short- to midterm clinical outcomes of a series of patients with isolated acute syndesmosis instability treated with arthroscopy and percutaneous suture-button fixation.

Materials And Methods: A review of 17 patients treated through the arthroscopic approach. The mean age of the patients was 27.

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The modified Lapidus procedure is considered a useful tool for correction of multiplanar deformities in the hallux valgus, including first metatarsal pronation. It offers a greater power of correction compared to most other osteotomies. However, postoperative complications can occur in up to 12% of cases.

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Background: The objective of this study was to evaluate the correlation between Weightbearing CT (WBCT) markers of pronounced peritalar subluxation (PTS) and MRI findings of soft tissue insufficiency in patients with flexible Progressive Collapsing Foot Deformity (PCFD). We hypothesized that significant correlation would be found.

Methods: Retrospective comparative study with 54 flexible PCFD patients.

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The association of ipsilateral talar and calcaneal fractures is an uncommon combination and is typically the result of a high-energy trauma. It is often associated with comminution, marked fracture displacement, and soft-tissue compromise. Obtaining satisfactory clinical and radiographic results is very challenging.

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Background: Peroneal tendon disorders are common causes of lateral hindfoot pain. However, total rupture of the peroneal longus tendon is rare. Surgical treatment for this condition is usually a side-to-side tenodesis of the peroneal longus tendon to the peroneal brevis tendon.

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Background: Zone 1 fractures of the proximal fifth metatarsal are usually treated nonsurgically using some type of immobilization. The aim of this study was to compare clinical and functional outcomes, time to return to prior activity levels, and rate of bone healing when using a hard-soled shoe (HSS) vs a controlled ankle motion (CAM)-walker boot (CWB).

Methods: Seventy-two consecutive patients with zone 1 fractures of the fifth metatarsal base were treated conservatively with either an HSS or CWB by 2 different providers.

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Peroneal tendon disorders are common causes of lateral and retromalleolar ankle pain. For irreparable tears of the tendon, a salvage procedure is indicated with segmental resection followed by reconstruction with tenodesis, tendon transfer, or bridging the defect using allograft or autograft. Although there is insufficient evidence to guide which of these treatment options provides the best outcomes, reconstruction with tendon allograft has provided satisfactory clinical results and is effective for pain relief and restoration of tendon function.

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Background: Weightbearing cone beam computed tomography (WB CBCT) allows detailed 3-dimensional imaging of the foot and ankle in a weightbearing state and provides improved accuracy and reliability of foot alignment measures, especially when compared with conventional radiographic views.

Purpose: To describe the foot alignment in National Basketball Association (NBA) players with different symptomatic foot and ankle injuries using WB CBCT and to determine if any predominant morphotype would be identified.

Study Design: Cross-sectional study; Level of evidence, 3.

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In this report, we describe a rare complication of an open re-rupture of the Achilles tendon following a minimally invasive Achilles tendon repair on a healthy 29-year-old active male. The reinjury happened 19 weeks following the primary surgical repair of a spontaneous rupture, performed by minimally invasive technique with the help of a jig using partially absorbable sutures and four locking stitches. The wound of the open re-rupture was transverse, in a perpendicular orientation relative to the longitudinal approach used in the index procedure.

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Objective: To analyze the epidemiology and characteristics of patients with calcaneus fractures.

Methods: This is a retrospective revision of patients with calcaneus fractures hospitalized in the Institute of Orthopedics and Traumatology of this institution between 2006 and 2010. Data such as age, gender, laterality, trauma mechanism, type of fracture, associated injuries, compound fractures, and time from injury to surgery were analyzed.

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Objective: To analyze the characteristics of patients with Lisfranc injuries and their associated fractures

Methods: This is a retrospective analysis on 42 patients with Lisfranc injuries hospitalized at Instituto de Ortopedia e Traumatologia do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, between 2006 and 2010. Parameters on patient profile, risk factors, fracture characteristics, data on treatment and acute complications were analyzed

Results: Analysis of 42 cases showed that in our sample, men were more affected than women, with a ratio of 4.25:1.

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Objective: to analyze the characteristics of patients with talus fractures and the injuries that they present.

Methods: retrospective analysis on patients hospitalized in the Institute of Orthopedics and Traumatology, Hospital das Clínicas, School of Medicine of the University of São Paulo, between 2006 and 2011, with talus fractures. Patient profile parameters, risk factors, fracture characteristics, treatment data and acute complications were analyzed.

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