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|dc.description.abstract||Introduction: due to the unsatisfactory results obtained with posterior instrumentations in cases of vertebral tumors and to the economical limitations of our patients for acquiring the systems available in the market, a vertebral body prosthesis to stabilize the spine after corpectomy was designed. Objective: to describe the structural and functional characteristics of the JR prosthesis, the biomechanical assays in cadaver and the surgical technique on the patient. Methods: firstly, it was performed a detailed anatomical study of the vertebral bodies. A design of a modular, anatomical and expandable device was obtained. Its components once assembled make an implant with expandable cage and plate dual function. Afterwards, a biomechanical assay was performed in a cadaver and the device was implanted in a patient with vertebral body metastasis. Results: the radiographs extracted from the cadaver after implant location did not show loss of fixation. When the cadaver was raised, flexion moments were generated laterally with levers 80 cm long; therefore, the prosthesis was demanded in its most vulnerable point with a force of approximately 588 N. With rotation, flexion and extensions forced, stability was preserved and no movement was observed. The device was implanted in a 50-year-old woman with metastatic thyroid cancer affecting L3. Pain improved in the postoperative immediate, as well as its motor function, which allowed her to walk with a stable and painless spine for seven years. No implant failure was observed. Conclusion: the dual cage function and plate integrated in a single device offers a mechanical advantage, compared with the cages and plates used separately, since the prosthesis design permits to apply a distraction axial force with lateral fixation at the same time, through one implant. The results of the implant placement in the patient were satisfactory.|
|dc.title||JR vertebral body prosthesis: A modular, anatomical and expandable device, with cage function and plate dual designed ad hoc for spine stabilization after corpectomy [Pr�tesis de cuerpo vertebral JR: Dispositivo modular, anat�mico y expandible, con funcion de jaula y placa dise�ada ad hoc para estabilizar la columna despu�s de corpectom�a]|
|dc.subject.keyword||Bone plates; Orthopedic procedures/instrumentation; Orthopedic procedures/methods; Prostheses and implants; Spine/surgery|
|dc.contributor.affiliation||Jim�nez, J.J.R., Ortopedia del Hospital Civil de Guadalajara Fray Antonio Alcalde, Universidad de Guadalajara, Hospital 278, Col. El Retiro, C.R: 44280 - Guadalajara, Jalisco, Mexico; Chiquete, E., Del Servicio de Medicina Interna del Hospital Civil de Guadalajara Fray Antonio Alcalde, Universidad de Guadalajara, Guadalajara, Mexico; Ram�rez, S., Departamento de Ense�anza e Investigati�n, Hospital Civil de Guadalajara Fray Antonio Alcalde, Universidad de Guadalajara, Guadalajara, Mexico; Guerrero, R., Servicio de Neurolog�a y Neurocirug�a, Hospital Civil de Guadalajara Fray Antonio Alcalde, Universidad de Guadalajara, Guadalajara, Mexico|
|Appears in Collections:||Producción científica UdeG|
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