Publications by authors named "Luis Gustavo Calieron"

3 Publications

  • Page 1 of 1

Biomechanical Analysis of Two Types of Humerus Supracondylar Fracture Fixation in Anatomical Model.

Rev Bras Ortop (Sao Paulo) 2019 May 27;54(3):261-267. Epub 2019 Jun 27.

Serviço de Ortopedia Pediátrica, Hospital São Vicente de Paulo, Passo Fundo, RS, Brasil.

 To analyze the stability of humerus supracondylar fracture fixation with Kirschner wires comparing intramedullary and lateral (Fi), and two parallel lateral wires (FL) fixation in experimental models, to define which configuration presents greater stability.  A total of 72 synthetic humeri were cross-sectioned to simulate the fracture. These bones were divided into two equal groups and the fractures were fixed with parallel Kirschner wires (FL) and with a lateral and intramedullary (Fi) wire. Then, the test specimens were subjected to stress load tests on a universal test machine, measured in Newtons (N). Each group was subdivided into varus load, valgus, extension, flexion, external rotation and internal rotation. An analysis of the data was performed comparing the subgroups of the FL group with their respective subgroups of the Fi group through the two-tailed t test.  The two-tailed t test showed that in 4 of the 6 evaluated conditions there was no significant statistical difference between the groups (  > 0.05). We have found a significant difference between the group with extension load with a mean of 19 N (FL group) and of 28.7 N (Fi group) (  = 0.004), and also between the groups with flexural load with the mean of the forces recorded in the FL group of 17.1 N and of 22.9 N in the Fi group (  = 0.01).  Fixation with one intramedullary wire and one lateral wire, considering loads in extension and flexion, presents greater stability when compared to a fixation with two lateral wires, suggesting similar clinical results.
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May 2019

Hindfoot aneurysmal bone cyst: report of two cases.

Rev Bras Ortop 2018 Mar-Apr;53(2):257-265. Epub 2018 Feb 23.

Instituto de Ortopedia e Traumatologia, Passo Fundo, RS, Brazil.

Osseous tumors of the hindfoot are not usual in the literature, the diagnosis in these cases is difficult and can often go unnoticed. Besides that, surgery and reconstruction are complicated due to the complexity of the local anatomy, which makes these lesions even more challenging for the orthopedic oncological professionals. On the following article two cases of aneurysmal bone cyst of the hindfoot are reported, as well as the alternatives and peculiarities in conducting these cases according to the oncological principles. When the subject are hindfoot tumor lesions, the early diagnosis is extremely important, as well as the proper staging and the management of the case by the orthopedic oncological professional according to oncological principles.
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February 2018


Rev Bras Ortop 2010 Jan 16;45(1):33-9. Epub 2015 Nov 16.

Physician and Specialist in Pediatric Orthopedics at the Institute of Orthopedics and Traumatology of Passo Fundo.

Objectives: To evaluate the treatment of severe proximal femoral epiphysiolysis through subtrochanteric osteotomy using the Ilizarov method and to propose a new method for calculating the necessary correction.

Methods: A case study was carried out among patients affected by severe proximal femoral epiphysiolysis who underwent subtrochanteric osteotomy with external multiplanar fixation and were evaluated postoperatively using the modified Southwick classification. A method was developed for calculating the angular correction needed for the surgical procedure.

Results: Thirteen hips were analyzed: four left hips (30.8%) and nine right hips (69.2%). The majority of the patients (61.5%) were male, with a mean age of 14 years. In relation to pain and function, the results were excellent for 30.8%, good for 46.2% and regular for 23.0%, and none of the patients presented poor results. Regarding mobility, the results were excellent for 46.2%, good for 30.8% and regular for 23.0%. Radiographically, the results were excellent for 7.7%, good for 69.2%, regular for 15.4% and poor for 7.7%.

Conclusions: Percutaneous treatment of severe proximal epiphysiolysis using the Ilizarov method is a good treatment option with good indices for improvement of pain and function. The proposed calculation method can help in planning surgical procedures, with variations between calculated and measured angles of the order of 3°.
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January 2010