Publications by authors named "Marcel J S Tamaoki"

Article Synopsis
  • A cross-sectional study conducted in São Paulo, Brazil, aimed to determine the prevalence of musculoskeletal pain in amateur golfers, analyzing 359 participants from golf clubs affiliated with the São Paulo Golf Federation.
  • The study found a high prevalence of pain at 55.15%, with moderate pain intensity averaging 5.21 on the Visual Analogue Scale, indicating significant discomfort among players.
  • Results showed that younger golfers, particularly those aged 30 to 39 years, experienced the highest pain prevalence (68.80%), with the upper limbs being the most affected area (65.66%).
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 To evaluate the usefulness of the Phalen test and the Tinel sign in the prognosis and the impact on quality of life in the clinical course of patients with carpal tunnel syndrome undergoing surgical treatment through the traditional open approach.  The present is a cohort study on prognosis. We included 115 patients with high probability of receiving a clinical diagnosis of carpal tunnel syndrome with indication for surgical treatment.

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Unlabelled: Acute radiating low back pain is a frequently occurring clinical condition among the population, and it represents a significant portion of urgent care in public health services.

Objective: Consider the clinical characteristics, demographics, as well as the intensity of the pain, discomfort, and dysfunction of patients who show a clinical diagnosis that is compatible with acute radicular pain, new or reoccurring after an asymptomatic period.

Methods: Patients that display a clinical diagnosis that is compatible with acute sciatic nerve pain, with the beginning of it starting within three months, without previous history of a similar occurrence, were seen in an orthopedic health clinic from July 2020 to January 2021.

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 Semiquantitative and automated measurement of nuclear material removal and cell infiltration in decellularized tendon scaffolds (DTSs).  16 pure New Zealand rabbits were used, and the gastrocnemius muscle tendon was collected bilaterally from half of these animals (16 tendons collected); 4 were kept as control and 12 were submitted to the decellularization protocol (DTS). Eight of the DTSs were used as an in vivo implant in the experimental rotator cuff tear (RCT) model, and the rest, as well as the controls, were used in the semiquantitative and automated evaluation of nuclear material removal.

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Introduction: Subacromial injections are therapeutic options for rotator cuff injuries, with consistent results not well established yet for each drug applied. The objective of this systematic review and meta-analysis is to analyse the effectiveness of the substances used in subacromial injections for the treatment of rotator cuff injuries and shoulder impingement syndrome, considering the functional gain and pain improvement of the shoulder.

Methods And Analysis: Beginning in November 2022, we will perform a detailed search using the MEDLINE/PubMed, EMBASE, Cochrane Central Register of Controlled Trials and LILACS databases.

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 Histological and macroscopic evaluation of the healing process of acute lesions of the femoral rectus muscle using stem cells derived from adipose tissue-derived stem cells (ADSCs).  An experimental study was conducted with 18 hind legs of New Zealand rabbits, which were divided into three study groups according to the intervention to be performed. In group I, no surgical procedure was performed; in group II-SHAN, the experimental lesion was performed without any additional intervention protocol; in group III-Intervention, the addition of ADSCs was performed in the same topography of the experimental lesion.

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Article Synopsis
  • - A study investigated anatomical variations in 115 patients with carpal tunnel syndrome who underwent traditional open release surgery, confirming diagnoses with electroneuromyography and ultrasound.
  • - The study found a high prevalence of anatomical variations, with 63.5% of patients showing variations either within or outside the carpal tunnel, particularly noting a 57.4% occurrence of the carpal transverse muscle.
  • - The research highlighted that finding extra-carpal variations, like the transverse carpal muscle, may signal the presence of more complex intra-carpal variations, including a bifid median nerve and persistent median artery.
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Objective: To verify the prevalence of patients who were victims of motorcycle trauma who were under the influence of alcohol and drugs.

Methods: The study was observational and prospective, with patients hospitalized to the Orthopedics and Traumatology Ward of Hospital São Paulo (UNIFESP), from March 2015 to March 2016. The study included patients of all genders, over 18 years old, hospitalized due to motorcycle trauma and who needed orthopedic surgical treatment.

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Background: Shoulder maneuvers and magnetic resonance imaging (MRI) are performed to diagnose supraspinatus tendon tears regardless of arthroscopy exam. Although there are many studies on this subject, there is a lack of studies comparing the sensitivity (Se) and specificity (Sp) of shoulder maneuvers and MRI to arthroscopic findings (intact, partial, or full thickness supraspinatus tendon tear).

Aim: To compare the diagnostic values of shoulder maneuvers with MRI for supraspinatus tendon tears in patients undergoing shoulder arthroscopy.

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The study aimed to investigate the correlation between baropodometric parameters and the functional score in the evaluation of the results of surgery in patients with clubfoot. Fifty-one patients (77 feet) underwent surgical treatment, with a mean follow-up of 9.58 years (5-15 years), and a mean age of 10.

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Objective: Heterotopic ossification is defined as the formation of trabecular bone in soft tissues. It is a common complication after surgical treatment of acetabular fractures. However, its prophylaxis and treatment are still controversial.

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Introduction: Hip arthroplasties for the treatment of displaced femoral neck fractures in adults can be total replacement or hemiarthroplasty. Despite the high prevalence of these fractures and large number of studies on the topic, the best choice of arthroplasty to be used remains unclear. The present study aims to overview the results of systematic reviews of randomised controlled trials (RCTs) comparing outcomes between total hip replacement and hemiarthroplasty for displaced femoral neck fractures in adults.

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Introduction: Fractures of the diaphysis of the clavicle are common; however, treatment guidelines for this condition are lacking. Surgery is associated with a lower risk of non-union and better functional outcomes but a higher risk of complications. Open reduction and internal fixation with plates and screws are the most commonly performed techniques, but they are associated with paraesthesia in the areas of incisions, extensive surgical exposure and high rates of implant removal.

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Introduction: Diagnosis of Achilles insertional tendinopathies (AIT) is based on pain by tendon palpation. However, there is no consensus or standard with regard to the amount of force to be used during the evaluation. Algometry is a method of measuring the pressure applied in a specific region and can be a method for determining diagnosis values.

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Distal radial fractures are very common. Vicious consolidation can occur in up to one third of these fractures, resulting in wrist pain, restricted movement, and, eventually, physical limitation or disability. The treatment of this condition consists in corrective osteotomy, which requires careful preoperative planning due to its three-dimensional complexity, especially in injuries with joint involvement.

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Background: Lateral epicondylitis (LE), also known as tennis elbow, is the most common painful elbow condition. It affects approximately 1-3% of adults. There are various possible treatments described in the literature, but evidence to support a gold standard management protocol is lacking.

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Background: There remains a lack of consensus regarding the treatment of Achilles insertional tendinopathy. The condition is typically treated with eccentric exercises despite the absence of satisfactory and sustained results. Shockwave therapy was presented as an alternative, but there is a paucity of literature, with good outcomes, supporting its use.

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The increasing incidence of calcaneal tendon ruptures has substantially impacted orthopedic care and costs related to its treatment and prevention. Primarily motivated by the increasing of life expectancy, the growing use of tenotoxic drugs and erratic access to physical activity, this injury accounts for considerable morbidity regardless of its outcome. In recent years, the evolution of surgical and rehabilitation techniques gave orthopedists better conditions to decide the most appropriate conduct in acute tendon rupture.

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Calcaneal tendon injuries are extremely common in the general population and in orthopedics routine care. Its increasing incidence, which is motivated by an aging population, improved access to the health care system, increased prescription of continuous-use medication, erratic participation in sports and other factors, has had a direct impact on society. Consolidated treatment options for tendinopathies lack quality scientific support for many modalities.

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Introduction: Anatomical total shoulder arthroplasty (TSA) is an effective treatment adopted for patients with glenohumeral osteoarthritis (OA). The glenoid component failure is the main risk that occurs in this therapeutic choice; however, doubts remain regarding the selection of the best implant for avoiding complication. This systematic review aims to evaluate the glenoid component in TSA by comparing the complications of different types of implants.

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Unlabelled: The conditions affecting the calcaneal tendon remain extremely prevalent in the clinical practice. The search for information about these diseases in national and international scientific databases are commonly hampered in the use of search tools, requiring the use if an eponym in the strategy. Achilles, in reference to the hero of the Greek mythology, is often used by several authors in scientific publications despite the new Nomina Anatomica.

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Background: Scaffolds have considerably advanced in recent years. In orthopaedic surgery, scaffolds have been used as grafts in procedures involving tendon and ligament reconstruction. This paper aimed to produce and evaluate decellularized tendon scaffolds (DTSs) from biomechanical, microscopic, macroscopic and in vivo perspectives.

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Background: Total knee arthroplasty (TKA) is the treatment option for patients with severe osteoarthritis (OA) of the knee whose symptoms are refractory to conservative management. Unfortunately, the level of patient dissatisfaction is high, reaching up to 25%. The reasons for this dissatisfaction are multifactorial, but bone-implant mismatch significantly increases the chance of pain and functional limitation.

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Objective: To evaluate the effectiveness of single-dose focal shockwave therapy in plantar fasciitis treatment.

Methods: a primary, prospective study of a series of cases, conducted in the city of São Paulo, Brazil, by the Department of Orthopedics and Traumatology of the Universidade Federal de São Paulo, in Hospital São Paulo. All outcomes were measured at the time of inclusion of the patient in the study and at the post-intervention moments as it follows: three, six and twelve weeks.

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 To evaluate the inter- and intraobserver agreement regarding the Walch classification system for shoulder arthritis.  Computed tomography scans of the shoulder joint of adult patients were selected between 2012 and 2016, and they were classified by physicians with different levels of expertise in orthopedics. The images were examined at three different times, and the analyses were evaluated by the Fleiss Kappa index to verify the intra- and interobserver agreement.

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