Study of the tibial rotational deviation

OBJECTIVE: to evaluate the postoperative rotational deviation of diaphyseal tibial fractures in patients treated with non-reamed, interlocking intramedullary nailing and bridge plate, using computerized tomography for measurement. METHOD: one hundred and thirteen patients with diaphyseal tibial fractures were treated; 42 fractures were treated with non-reamed, interlocking intramedullary nailing, and 71 fractures were treated with bridge plate. Tibial rotation measurements were obtained by using the CT scan. All of the fractures were classified by the AO scale, by their presentation (closed and open) and the percentage of deviation on internal and external rotation. RESULTS: no significant difference in tibial rotation was found as a function of fracture location, internal or external rotation, and types A or B of fractures. However, in the case of type C fractures and open fractures, the treatment with non-reamed, interlocking intramedullary nailing resulted in a much smaller rotation in comparison to the treatment with bridge plate (p = 0.028 and p = 0.05, respectively). CONCLUSIONS: rotational deviations, regardless of the location of the diaphyseal tibial fractures, are associated to the trauma energy, thus presenting a greater challenge to control it by using the bridge plate.OBJETIVO: avaliar o desvio rotacional pós-operatório das fraturas diafisárias da tíbia de pacientes tratadas com haste intramedular bloqueada não-fresada e placa em ponte, utilizando a tomografia computadorizada. MÉTODOS: foram tratados 113 pacientes com fraturas diafisárias da tíbia, sendo que em 42 fraturas os autores utilizaram haste intramedular bloqueada e em 71 foram utilizadas placa em ponte. O método tomográfico utilizado ara se obter as medidas da rotação tibial. Foi empregada a classificação AO das fraturas; à exposição: fechadas e expostas e a percentagem de desvios em rotação interna e externa. RESULTADOS: foi demonstrado não haver diferença significativa de rotação tibial nos seguintes parâmetros analisados: localização, rotação interna ou externa e nos tipos A e B da classificação AO. Porém, nas fraturas do tipo C e nas fraturas expostas, a haste intramedular bloqueada apresentou diferença rotacional significativamente menor (p = 0,028) e (p = 0,05), quando comparada à placa em ponte. CONCLUSÃO: independente da localização das fraturas diafisárias da tíbia, os desvios rotacionais estão relacionados à energia do trauma, apresentando uma maior dificuldade de controle com a técnica placa em ponte.Hospital Santa Teresa Prof. Dr. Donato D'Ângelo Serviço de Ortopedia e TraumatologiaUFRJ Faculdade de MedicinaHospital de IpanemaUNIFESP-EPM Departamento de Ortopedia e TraumatologiaUNIFESP, EPM, Depto. de Ortopedia e TraumatologiaSciEL

Positioning of the acetabular component in cemented prostheses – radiographic calculation

AbstractObjectiveto assess the reliability of the inclination angle and anteversion of acetabular cup component in patients with idiopatic osteoarthritis of the hip, aseptic necrosis and hip neck fracture using trigonometric formula and plain radiographs.Methods66 patients underwent cemented total arthroplasty of 72 hips. The inclination of acetabular component was measured using plain radiograph. The acetabular component anteversion was measured using trigonometric formula.Resultsit was observed that, in the osteoarthritic hips, hip neck fracture and aseptic necrosis, the degree of agreement was highly significant (p < 0.0001), in the measurements of anteversion and inclination angles, among the three assessments, from intra as well as inter-observers. All the agreement pairs were of excellent degree (ICC > 0.80).Conclusionusing plain radiographs and trigonometric formula, the method resulted to be highly accurate and reliable. Besides being easy to be calculated. No significant variation was found in the anteversion and inclination angles when compared with osteoarthritis of the hip, aseptic necrosis and hip neck fracture

Tratamento das fraturas do terço distal da tíbia: fixar ou não a fíbula? Treatment of the distal fractures of the tibia: shall we fix the fibula?

OBJETIVO: Comparar os resultados da fixação ou não da fíbula no tratamento das fraturas do terço distal da tíbia, com haste intramedular e placa em ponte. MÉTODOS: Foram 47 fraturas em 47 pacientes, sendo que em 21 pacientes foi utilizada a haste intramedular bloqueada não fresada e em 26 a placa em ponte (placa de compressão dinâmica larga ou estreita) pela técnica minimamente invasiva. Todas as fraturas da fíbula se encontravam no mesmo nível ou abaixo da fratura da tíbia. RESULTADOS: No grupo tratado com fixação da fíbula, a média do tempo de consolidação foi de 14,6 semanas. No grupo tratado sem fixação da fíbula, a média do tempo de consolidação foi de 14,3 semanas. No grupo de pacientes tratados com fixação da fíbula observou-se uma proporção de desvio angular em varo (6,3%) significativamente menor que o subgrupo sem fixação de fíbula (32,3%), e com desvio angular em valgo (62,5%) significativamente maior que o grupo sem fixação de fíbula (32,3%). CONCLUSÃO: Os benefícios da fixação da fíbula permanecem ainda controversos quando ocorrem fraturas associadas com a tíbia. Em relação à consolidação, não houve diferença significativa entre os grupos.<br>OBJECTIVE: To compare the results of fibula fixation (or not fixation) in the treatment of fractures located in the distal third part of the tibia, by using intramedullary nailing and bridge plate. METHOD: 47 fractures in 47 patients were studied. Twenty-one patients were treated with non-reammed, interlocking intramedullary nailing, and 26 patients were treated with wide or narrow dynamic compressional plates (using a minimally invasive technique). All of the fibula fractures are located at the same level or below the tibia fractures. RESULTS: in the group of patients treated with fibula fixation, the average healing time was 14.6 weeks. In the group of patients treated without fibula fixation, the average healing time was 14.3 weeks. In the group of patients treated with fibula fixation it was observed a significantly smaller proportion of valgus angular deviation (6.3%) than in the group of patients treated without fibula fixation (32.3%). CONCLUSIONS: The benefits of fibula fixation still keeping controversial when tibial fractures are associates. Regarding fracture healing, there was no significant difference between the studied fracture groups

Fraturas da extremidade distal da tíbia tratadas pela haste intramedular e placa em ponte: comparação do tempo de exposição à radiação nos dois métodos

OBJETIVO: Comparar o tempo de exposição à radiação nos pacientes com fratura do terço distal da tíbia tratados com haste intramedular e placa em ponte. MÉTODOS: Em 33 fraturas foram utilizadas hastes intramedulares e em 41, placas em ponte. No grupo haste, segundo a classificação AO, 14 pacientes apresentavam fraturas do tipo A, 15 do tipo B e quatro, do tipo C. Doze pacientes sofreram fraturas fechadas e 21, expostas. No grupo placa, 10 pacientes apresentavam fraturas do tipo A, 22 do tipo B e nove do tipo C. Vinte e sete pacientes sofreram fraturas fechadas e 14 expostas. RESULTADOS: Observou-se que existe diferença significativa no tempo de exposição à radiação entre pacientes tratados com haste e placa (p = 0,0001). O grupo tratado com haste apresentou tempo de exposição à radiação significativamente maior que o grupo com placa. Quando comparado o tipo de fratura (A, B e C), observou-se que não existe diferença significativa no tempo de exposição à radiação quando utilizada a técnica de haste (p = 0,19) e placa (p = 0,80). CONCLUSÃO: Fraturas do terço distal da tíbia tratadas com haste intramedular apresentam um tempo de exposição à radiação significativamente maior do que as fraturas tratadas com placa em ponte, independente do tipo de fratura

Positioning of the acetabular component in cemented prostheses - radiographic calculation Posicionamento do componente acetabular em próteses cimentadas – cálculo radiográfico

OBJECTIVE: to assess the reliability of the inclination angle and anteversion of acetabular cup component in patients with idiopatic osteoarthritis of the hip, aseptic necrosis and hip neck fracture using trigonometric formula and plain radiographs. METHODS: 66 patients underwent cemented total arthroplasty of 72 hips. The inclination of acetabular component was measured using plain radiograph. The acetabular component anteversion was measured using trigonometric formula. RESULTS: it was observed that, in the osteoarthritic hips, hip neck fracture and aseptic necrosis, the degree of agreement was highly significant (p 0.80). CONCLUSION: using plain radiographs and trigonometric formula, the method resulted to be highly accurate and reliable. Besides being easy to be calculated. No significant variation was found in the anteversion and inclination angles when compared with osteoarthritis of the hip, aseptic necrosis and hip neck fracture. OBJETIVO: Medir a confiabilidade do &#226;ngulo de inclina&#231;&#227;o e a antevers&#227;o do componente acetabular em pacientes com osteoartrose idiop&#225;tica do quadril, necrose ass&#233;ptica e na fratura do colo do f&#234;mur por meio de uma f&#243;rmula trigonom&#233;trica e radiografias convencionais. M&#201;TODOS: Foram tratados 66 pacientes com artroplastia total cimentada em 72 quadris. A inclina&#231;&#227;o do componente acetabular foi medida por radiografias panor&#226;micas de bacia em incid&#234;ncia anteroposterior. A antevers&#227;o do componente acetabular foi medida com o uso de f&#243;rmula trigonom&#233;trica. RESULTADOS: Observou-se que, tanto nos quadris com artrose, na fratura do colo do f&#234;mur e na necrose ass&#233;ptica, o grau de concord&#226;ncia foi altamente significativo (p 0,80). CONCLUS&#195;O: Usando radiografias convencionais e uma f&#243;rmula trigonom&#233;trica, o m&#233;todo mostrou ser altamente preciso, f&#225;cil de ser calculado e com grande confiabilidade. N&#227;o foi encontrada varia&#231;&#227;o significativa no &#226;ngulo de antevers&#227;o e no &#226;ngulo de inclina&#231;&#227;o quando comparado com a artrose do quadril, a necrose ass&#233;ptica e a fratura do colo do f&#234;mur

Posicionamento do componente acetabular em próteses cimentadas – cálculo radiográfico

ResumoObjetivoMedir a confiabilidade do ângulo de inclinação e a anteversão do componente ace- tabular em pacientes com osteoartrose idiopática do quadril, necrose asséptica e na fratura do colo do fêmur por meio de uma fórmula trigonométrica e radiografias convencionais.MétodosForam tratados 66 pacientes com artroplastia total cimentada em 72 quadris. A in- clinação do componente acetabular foi medida por radiografias panorâmicas de bacia em incidência anteroposterior. A anteversão do componente acetabular foi medida com o uso de fórmula trigonométrica.ResultadosObservou-se que, tanto nos quadris com artrose, na fratura do colo do fêmur e na necrose asséptica, o grau de concordância foi altamente signi- ficativo (p < 0,0001), nas medidas dos ângulos de anteversão e inclinação, entre os três avalia- dores, tanto intra como interobservador. Todos os pares de concordância foram de grau ótimo (ICC > 0,80).ConclusãoUsando radiografias convencionais e uma fórmula trigonométrica, o método mostrou ser altamente preciso, fácil de ser calculado e com grande confiabilidade. Não foi encontrada variação significativa no ângulo de anteversão e no ângulo de inclinação quando comparado com a artrose do quadril, a necrose asséptica e a fratura do colo do fêmur.AbstractObjectiveto assess the reliability of the inclination angle and anteversion of acetabular cup component in patients with idiopatic osteoarthritis of the hip, aseptic necrosis and hip neck fracture using trigonometric formula and plain radiographs.Methods66 patients underwent cemented total arthroplasty of 72 hips. The inclination of acetabular component was measured using plain radiograph. The acetabular component anteversion was measured using trigonometric formula.Resultsit was observed that, in the osteoarthritic hips, hip neck fracture and aseptic necrosis, the degree of agreement was highly significant (p < 0.0001), in the measurements of anteversion and inclination angles, among the three assessments, from intra as well as inter-observers. All the agreement pairs were of excellent degree (ICC > 0.80).Conclusionusing plain radiographs and trigonometric formula, the method resulted to be highly accurate and reliable. Besides being easy to be calculated. No significant variation was found in the anteversion and inclination angles when compared with osteoarthritis of the hip, aseptic necrosis and hip neck fracture

FRACTURES OF THE DISTAL EXTREMITY OF THE TIBIA TREATED WITH INTRAMEDULLARY NAIL OR BRIDGE PLATE: COMPARISON OF RADIATION EXPOSURE DURATION BETWEEN THE TWO METHODS

ABSTRACTObjective: To compare the duration of exposure to radiation among patients with fractures of the distal third of the tibia treated with an intramedullary nail or with a bridge plate. Methods: Intramedullary nails were used for 33 fractures, and bridge plates were used for 41 fractures. In the nail group, according to the AO classification, 14 patients had type A fractures, 15 had type B and four had type C. Twelve patients had closed fractures and 21 had open fractures. In the plate group, 10 patients had type A fractures, 22 had type B and nine had type C. Twenty-seven patients had closed fractures and 14 had open fractures. Results: There was a significant difference in the duration of exposure to radiation between the patients treated using a nail and those treated using a plate (p = 0.0001). The group treated using a nail had significantly greater exposure to radiation than did the group treated using a plate. Comparing the type of fracture (A, B or C), it was observed that there was no significant difference in the duration of exposure to radiation between the nail technique (p = 0.19) and the plate technique (p = 0.80). Conclusion: Fractures of the distal third of the tibia treated with an intramedullary nail present significantly greater exposure to radiation than do fractures treated with a bridge plate, independent of the fracture type

LOCALIZATION OF THE TIBIAL ENTRY POINT

ABSTRACTObjective: To assess the intramedullary nail entry point in the proximal region of the tibia, through a questionnaire. Methods: 230 participants undergoing treatment for tibial fractures were interviewed. The questionnaire was created with three sections that could be answered in a ”Yes” or “No” format and a fourth section that had two figures representing anteroposterior (AP) and lateral view x-rays that could be answered in an “A, “B” or “C” format. Results: The most frequent reason was “ease of access” (67.8%), followed by “better nail insertion access” (60.9%) and, in third place, “to prevent knee pain” (27.4%). The reasons for choosing the access so as to “prevent knee pain” and “avoid tendinitis” had a significant relationship with points “A” and “C” of the schematic AP x-ray figure, especially “C” (medial tibial crest). There were no significant differences between the types of access to the patellar ligament in the schematic AP and lateral x-ray figures between age groups. Conclusion: The greater the age was, the larger the proportion choosing the question “to avoid valgus deformity” was. The reasons from a medical (practical) perspective related to the type of access in the transpatellar ligament, while the reasons from a patient (functional) perspective related to medial parapatellar access. Transpatellar access was chosen by most of the participants (66.5%)

ANATOMIC STUDY OF THE PROXIMAL THIRD OF THE FEMUR: FEMOROACETABULAR IMPACT AND THE CAM EFFECT

ABSTRACTTo analyze anatomical variations of the proximal end of femur that could cause a femoroacetabular impact. Methods: 199 skeletically mature anatomical specimens of femurs were used. The femurs were measured in order to determine the anteversion angle of the femoral neck, neckshaft angle, sphericity of the femoral head at anteroposterior and superoinferior, angle between epiphysis and the anterior femoral neck, angle between epiphysis and the neck at lateral plane, anteroposterior distance at 5mm of the head and neck junction and anteroposterior distance of the neck base. Results: we found that the impact subgroup presented a significantly larger junction diameter of 5mm (p = 0.0001) and cam-head (%) (p= 0.0001), while base-cam (%) (p = 0.0001) showed a significantly smaller diameter than the subgroup without impact. It was identified that cam-head (%) ≤ 80 e base-cam (%) ≤ 73 were identified as the optimal impact points. Conclusion: our study showed that the effect cam, caused by anatomical variations of the proximal femoral end focused the head-neck junction and base of the neck-junction head-neck. These rates can be predictive factors of the impact