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1.
Rev. bras. ortop ; 55(6): 778-782, Nov.-Dec. 2020. graf
Article in English | LILACS | ID: biblio-1156183

ABSTRACT

Abstract Objectives The present paper aims to evaluate and compare the histological features of fresh and frozen menisci stored in a tissue bank for 1 month and for 5 years. Methods The meniscal grafts were subjected to a histological study. A total of 10 menisci were evaluated; 2 were frozen for 5 years, 4 were frozen for 1 month, and 4 were fresh, recently harvested specimens. Histological properties were evaluated in sections stained with hematoxylin and eosin and Masson trichrome methods. Results The menisci frozen for 1 month showed partially preserved collagen fiber structure and no significant hydropic tissue degeneration. The menisci frozen for 5 years presented an evident dissociation of collagen fibers and multiple foci of hydropic degeneration. Discussion Degeneration was much more significant in menisci stored for 5 years, indicating that a long freezing period results in substantial progression of tissue deterioration. This may suggest that the 5-year period, considered the maximum time for graft storage before transplant, is too long. Conclusion Grafts stored for 1 month showed a slight degenerative change in collagen fibers, whereas menisci frozen for 5 years presented significant tissue degeneration.


Resumo Objetivos Avaliar e comparar as características histológicas de meniscos frescos e meniscos congelados armazenados em banco de tecidos por 1 mês e por 5 anos. Métodos Foi feito um estudo histológico com enxertos meniscais. Avaliamos 10 meniscos, sendo 2 que ficaram armazenados sob congelamento por 5 anos, 4 armazenados congelados por 1 mês, e 4 frescos, recém captados. Foram feitos cortes histológicos corados com hematoxilina e eosina e Tricrômico de Masson, para avaliação das propriedades histológicas. Resultados Os meniscos congelados por 1 mês apresentaram preservação parcial da estrutura das fibras colágenas, sem degeneração hidrópica significativa do tecido. Nos meniscos congelados por 5 anos, observamos dissociação evidente das fibras colágenas, com presença de múltiplos focos de degeneração hidrópica. Discussão Encontramos degeneração bem mais significativa nos meniscos armazenados por 5 anos, o que indica que o longo período de congelamento leva à progressão significativa da degeneração do tecido. Isto pode sugerir que o período de 5 anos, considerado período máximo que o enxerto pode permanecer armazenado antes de ser transplantado, é um período muito longo. Conclusão Nos enxertos armazenados por 1 mês, existiu apenas discreta alteração degenerativa das fibras colágenas, enquanto que nos meniscos com 5 anos de congelamento foi observada degeneração significativa do tecido. Tibiais


Subject(s)
Tissue Banks , Wounds, Penetrating , Collagen , Eosine Yellowish-(YS) , Transplants , Meniscus , Freezing , Goals , Hematoxylin
2.
Rev. bras. ortop ; 55(3): 380-382, May-June 2020. graf
Article in English | LILACS | ID: biblio-1138024

ABSTRACT

Abstract Meniscal ossicle is a rare condition, which is occasionally symptomatic. Even though it has a low incidence, its diagnosis is important, because it may mimic other lesions. Magnetic resonance imaging (MRI) is a sensitive and specific method for its diagnosis. Its clinical behavior is benign and its conservative management is almost always successful, without any need for diagnostic and therapeutic procedures, such as arthroscopy. This report was able to demonstrate the correct diagnosis by MRI.


Resumo O osso meniscal é uma condição rara, ocasionalmente sintomática. Apesar de sua baixa incidência, é importante seu reconhecimento, uma vez que pode mimetizar outras lesões. A ressonância magnética (RM) é um método sensível e específico para seu diagnóstico. A evolução é de curso benigno e favorável ao tratamento conservador, não necessita de procedimentos diagnósticos e terapêuticos, como artroscopia, na grande maioria dos casos. No presente trabalho, foi demonstrado como o diagnóstico correto pode ser feito por RM.


Subject(s)
Humans , Male , Adult , Wounds and Injuries , Bone and Bones , Menisci, Tibial , Magnetic Resonance Imaging , Diagnostic Techniques and Procedures , Conservative Treatment , Knee Injuries , Knee Joint
3.
Rev. bras. ortop ; 50(6): 712-719, Nov.-Dec. 2015. tab, graf
Article in Portuguese | LILACS | ID: lil-769994

ABSTRACT

To ascertain the sensitivity, specificity, accuracy and concordance of the physical examination (PE) and magnetic resonance imaging (MRI) in comparison with arthroscopy, in diagnosing knee injuries. METHODS: Prospective study on 72 patients, with evaluation and comparison of PE, MRI and arthroscopic findings, to determine the concordance, accuracy, sensitivity and specificity. RESULTS: PE showed sensitivity of 75.00%, specificity of 62.50% and accuracy of 69.44% for medial meniscal (MM) lesions, while it showed sensitivity of 47.82%, specificity of 93.87% and accuracy of 79.16% for lateral meniscal (LM) lesions. For anterior cruciate ligament (ACL) injuries, PE showed sensitivity of 88.67%, specificity of 94.73% and accuracy of 90.27%. For MM lesions, MRI showed sensitivity of 92.50%, specificity of 62.50% and accuracy of 69.44%, while for LM injuries, it showed sensitivity of 65.00%, specificity of 88.46% and accuracy of 81.94%. For ACL injuries, MRI showed sensitivity of 86.79%, specificity of 73.68% and accuracy of 83.33%. For ACL injuries, the best concordance was with PE, while for MM and LM lesions, it was with MRI ( p < 0.001). CONCLUSIONS: Meniscal and ligament injuries can be diagnosed through careful physical examination, while requests for MRI are reserved for complex or doubtful cases. PE and MRI used together have high sensitivity for ACL and MM lesions, while for LM lesions the specificity is higher. Level of evidence II - Development of diagnostic criteria on consecutive patients (with universally applied reference "gold" standard).


Verificar a sensibilidade, especificidade, acurácia e concordância entre o exame físico (EF) e a ressonância magnética (RM) em comparação com a artroscopia, no diagnóstico das lesões do joelho. MÉTODOS: Estudo prospectivo com 72 pacientes avaliados quanto ao EF, à RM e aos achados artroscópicos. Foram comparados os achados entre si e observaram-se a concordância, acurácia, sensibilidade e especificidade. RESULTADOS: O EF demonstrou sensibilidade de 75%, especificidade de 62,50% e acurácia de 69,44% para as lesões meniscais mediais (MM). Para o menisco lateral (ML) encontraram-se sensibilidade de 47,82%, especificidade de 93,87% e acurácia de 79,16%. O EF demonstrou, para lesões do ligamento cruzado anterior (LCA), sensibilidade de 88,67%, especificidade de 94,73% e acurácia de 90,27%. As lesões do MM, às imagens de RM, apresentaram sensibilidade de 92,50%, especificidade de 62,50% e acurácia de 69,44%. As lesões do ML apresentaram sensibilidade de 65%, especificidade de 88,46% e acurácia de 81,94%. A RM evidenciou para as rupturas do LCA sensibilidade de 86,79%, especificidade de 73,68% e acurácia de 83,33%. Para o LCA, a melhor concordância foi com o EF; e para MM e ML, com a RM (p < 0,001). CONCLUSÕES: O exame físico cuidadoso diagnostica as lesões meniscais e ligamentares. A RM é reservada para casos complexos ou duvidosos. Associados, EF e a RM têm alta sensibilidade para as lesões do LCA e do MM, porém para o ML é a especificidade que é maior. Nível de Evidência II - Desenvolvimento de critérios diagnósticos em pacientes consecutivos (com padrão de referencia "ouro" aplicado).


Subject(s)
Humans , Male , Female , Adolescent , Young Adult , Middle Aged , Menisci, Tibial , Knee Injuries/surgery , Knee Injuries/therapy
4.
Article in English | IMSEAR | ID: sea-174823

ABSTRACT

Background: The condyles of femur and tibia are not having the perfect congruent articular surfaces to adapt each other. To overcome this incongruity there exist tibial menisci over the tibial plateau. Loss of tibial menisci would result in devastating effect on the normal functioning of knee joint. Meniscal allograft or synthetic implants are the alternatives suggested to restore the contact pressure following themeniscectomy operations. Size of menisci required for this allograft or synthetic implant procedures following meniscectomy can be determined. Present study done emphasizes on calculation of meniscal dimension by measuring the tibial plateau dimensions, using various analytical procedures and deriving the relevant formulae. Study Design: In the present study different parameters of tibialmeniscusweremeasured after exposure of knee joint. These measurements were done with digital Vernier calliper and a measuring scale. Results:MeanMML,MMW,MMCwere 42.28±3.71mm, 31.67±3.40mm, 101.46± 6.89mm.Mean LML, LMW, LMC were 32.73±3.08mm, 33.22±3.37mm, 97.61± 7.32mm respectively. Some of the linear equations derived from the study are as follows. y = 0.71*x + 9.01mm, here y=medial meniscal length and x= length of medial tibial plateau; y = 0.48*x + 16.55mm here y=medial meniscal width and x= width of medial tibial plateau; y = 0.84*x + 5.61mm here y= Lateral meniscal width and x= lateral tibial plateau width etc. Conclusion: It can be easily judged that a graft which is too small in the size to fit the desired knee joint can be trapped beneath the condyles of femur. Thismight result in early damage to it due to disproportionate pressure acting on small meniscus.Whereas a large meniscus to a knee joint which is loose in fitting could also turn out to be ineffective due to disproportionate pressure distribution. Present Anthropometric study provides quantitative formulae to determine the meniscal dimensions, which may help to design artificial meniscus prostheses.

5.
Acta ortop. mex ; 28(1): 33-38, ene.-feb. 2014. tab
Article in Spanish | LILACS | ID: lil-717267

ABSTRACT

La práctica deportiva a la fecha ha tenido un enorme auge en la sociedad mundial. Durante ésta, con frecuencia se generan lesiones de rodilla, específicamente lesiones meniscales que ameritan el tratamiento quirúrgico respectivo pudiendo ser: la remodelación y resección de fragmentos, la reparación meniscal o en casos extremos la práctica de injerto meniscal. En este trabajo prospectivo practicamos la resección fragmentaria y remodelación meniscal en pacientes deportistas y medimos su rendimiento físico-atlético postoperatorio. Métodos: Criterios de inclusión: Pacientes de ambos sexos quienes practicaran algún deporte con nivel amateur o recreativo competitivo y que sufrieran una lesión meniscal. Criterios de exclusión: Pacientes con ruptura total de ligamento cruzado anterior asociada, pacientes con pérdida de seguimiento y pacientes candidatos a reparación de menisco. Cohorte de 23 pacientes, 10 mujeres y 13 hombres captados en nuestro hospital. Se practicó un protocolo diagnóstico a fin de certificar la lesión. Los pacientes fueron intervenidos quirúrgicamente para realizar la resección y remodelación de fragmentos meniscales. Posteriormente fueron rehabilitados por el servicio de fisiatría y finalmente se autorizó regresar a la práctica deportiva. Se aplicó la tabla Tegner Lysholm Knee Scoring Scale para evaluar los resultados postoperatorios. Conclusión: Todos los pacientes fueron capaces de regresar a la práctica deportiva anterior a la lesión aunque con un rendimiento promedio de un 20 a 30% menor al previo. En el sexo femenino se requirió un mayor tiempo de recuperación.


The practice of sports has experienced a huge boom in societies worldwide. It often involves knee injuries, specifically meniscal tears that warrant surgical treatment which may include: fragment remodeling and resection, meniscal repair or, in extreme cases, the use of a meniscal graft. In this prospective study we performed fragment resection and meniscal remodeling in athletes and we measured their postoperative physical-athletic performance. Methods: Inclusion criteria: Patients of both sexes who practice a sport either as amateurs or at a recreational competitive level, who sustained a meniscal injury. Exclusion criteria: Patients with associated total anterior cruciate ligament tear, patients lost to follow-up, and patients eligible for meniscal repair. 23-patient cohort including 10 females and 13 males who presented at our hospital. A diagnostic protocol to certify the injury was applied. Patients underwent surgery to perform meniscal fragment resection and remodeling. They later underwent rehabilitation at the physiatrics service and finally received approval to return to sports. The Tegner Lysholm Knee Scoring Scale was used to assess postoperative results. Conclusion: All patients were able to return to practice their pre-injury sport, but their performance was 20 to 30% lower than before. Recovery took longer in females.


Subject(s)
Female , Humans , Male , Athletic Performance , Menisci, Tibial/injuries , Menisci, Tibial/surgery , Athletes , Cross-Sectional Studies , Prospective Studies , Records , Recovery of Function , Surveys and Questionnaires
6.
Rev. bras. ortop ; 48(5): 412-416, Sept-Oct/2013. tab, graf
Article in English | LILACS | ID: lil-697310

ABSTRACT

OBJECTIVE: To evaluate the frequency and morphometry of the Wrisberg's ligament and its relationships with the posterior cruciate ligament's femoral insertion. STUDY DESIGN: Controlled laboratory study. METHODS: 24 unpaired knee pieces, 12 right and 12 left were submitted to a deep dissection of the Wrisberg and posterior cruciate ligaments. The pieces were photographed with a digital camera and ruler; the Image J software was used to measure the ligaments' insertion areas, in square millimeters. RESULTS: The Wrisberg ligament was present in 91.6% of the studied pieces. In those its shape was elliptical in 12 pieces (54.54%). In 68% of the knees, the WL insertion was proximal to the medial intercondilar ridge, close to the PCL posteromedial bundle. The average area for the WL was 20.46 ± 6.12 mm2. This number corresponded to 23.3% of the PCL's average area. CONCLUSIONS: WL ligament is a common structure in knees. There is a wide variation of its insertion area. Proportionally to the PCL's insertion area the WL ones suggests that it may contribute to the posterior stability of the knee joint. .


OBJETIVO: Avaliar a frequência e a morfometria do ligamento meniscofemoral de Wrisberg e a relação de suas inserções femorais com aquelas do ligamento cruzado posterior (LCP). Desenho do estudo: Estudo laboratorial controlado. MÉTODOS: Foram feitas dissecções minuciosas das inserções femorais dos ligamentos de Wrisberg (LW) e do LCP em 24 peças anatômicas de joelhos. As peças foram fotografadas com uma câmera digital e marcador milimetrado; o programa Image J foi usado para medir a área das inserções ligamentares, em milímetros quadrados. RESULTADOS: O LW esteve presente em 91,6% das peças estudadas. Nessas, seu formato foi elíptico em 12 peças (54,54%). Em 68% dos joelhos a inserção do LW esteve proximal à crista intercondilar medial, próximo à banda posteromedial do LCP. A área média da inserção femoral do LW foi de 20,46 ± 6,12 mm2 , o que correspondeu a 23,3% da área de inserção do LCP. CONCLUSÕES: O LW é estrutura frequente nos joelhos, com grande variabilidade de sua área média. Proporcionalmente ao LCP, sua área média sugere que esse ligamento pode contribuir para a estabilidade posterior do joelho. .


Subject(s)
Humans , Adult , Cadaver , Posterior Cruciate Ligament/anatomy & histology , Menisci, Tibial
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