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Allport y Postman (1945; 1947) definieron con una gran sencillez uno de los paradigmas mAis efica... more Allport y Postman (1945; 1947) definieron con una gran sencillez uno de los paradigmas mAis eficaces en los estudios experimentales sobre el pensamiento social. Recordemos muy brevemente este procedimiento ya clAisico: se construyen cadenas de personas (generalmente integradas por cinco o seis sujetos), en las cuales cada una debe transmitir a la persona siguiente el mensaje oral que ha recibido de quien le precede. Registrando las versiones sucesivas que son transmitidas de este modo, se observa a lo largo de la cadena un doble proceso de deconstrucciA³n y reconstrucciA³n de la “verdad”: deconstrucciA³n en relaciA³n a la verdad del mensaje inicial, que se deforma de una manera mAis o menos espectacular, y reconstrucciA³n en relaciA³n con la verdad que es propia del pensamiento del grupo de pertenencia, es decir, si uno lo prefiere, se trata de una verdad que se adecua a dicha pertenencia.

La lettre de l'enfance et de l'adolescence, 2007

Distribution électronique Cairn.info pour ERES. © ERES. Tous droits réservés pour tous pays. La r... more Distribution électronique Cairn.info pour ERES. © ERES. Tous droits réservés pour tous pays. La reproduction ou représentation de cet article, notamment par photocopie, n'est autorisée que dans les limites des conditions générales d'utilisation du site ou, le cas échéant, des conditions générales de la licence souscrite par votre établissement. Toute autre reproduction ou représentation, en tout ou partie, sous quelque forme et de quelque manière que ce soit, est interdite sauf accord préalable et écrit de l'éditeur, en dehors des cas prévus par la législation en vigueur en France. Il est précisé que son stockage dans une base de données est également interdit.

Polis Investigacion Y Analisis Sociopolitico Y Psicosocial, 2010

Polis Investigacion Y Analisis Sociopolitico Y Psicosocial, Dec 3, 2009

Este texto fue revisado y comentado por el autor durante su estancia en la uam-i en febrero de 2009.

Archives of Orthopaedic and Trauma Surgery, 2019

Introduction The use of rotating-hinge total knee arthroplasties (TKA), despite several developme... more Introduction The use of rotating-hinge total knee arthroplasties (TKA), despite several developments in prosthetic design, remains controversial. Results as well as indications of these devices are still discussed in primary intention and for young patients. The aim was to analyze early complications and survival rate of rotating-hinge TKA in primary intention and for revisions. Methods A retrospective study included all the patients operated for primary or revision TKA procedure using a rotatinghinge TKA between 2015 and 2018. Clinical and radiological data were collected before surgery and then at a minimum follow-up of 1 year. The primary endpoint was the aseptic revision-free survival rate. Secondary endpoints were the overall survival rate, IKS scores, range of motion and patellar complications. Results Forty patients were included at an average follow-up of 18 months. Primary implantation was performed for 12 patients (30%), and revision for 28 cases (70%). At a mean follow-up of 18 months, only one implant was removed for a septic cause. The cumulative survival rate at 24 months was 95%. At final review, eight knees (20%) had been revised, five (12.5%) due to infection, two (5%) because of extensor mechanism failure, two (5%) for global stiffness. The objective and subjective IKS were significantly higher postoperatively in both primary and revision groups (p < 0.0001). Patellar height was significantly smaller after revision (p = 0.04), while ROM significantly improved in this group (p = 0.02). At final endpoint, one implant was removed for a septic cause. Conclusion This rotating-hinge TKA provides satisfying clinical and functional outcomes in primary intentions and in revision cases. There was no implant-associated complication. The complication rate remains high for revision surgery cases, mostly due to previous joint infections and poor soft tissue quality causing extensor mechanism failure. A longer-term study should be conducted to confirm this trend.

International Orthopaedics, 2019

Introduction Tibiofemoral dislocation is the most serious form of instability following total kne... more Introduction Tibiofemoral dislocation is the most serious form of instability following total knee arthroplasty (TKA). It is little reported in the literature, despite severity comparable to that in the native knee. The present systematic review and meta-analysis aimed to identify risk factors and treatment strategies. Methods The Cochrane, Medline (via PubMed), Google, and PROSPERO databases were searched in January 2018 following the PRISMA meta-analysis guidelines. All articles referring to tibiofemoral dislocation following primary TKA were included for analysis and extraction of individual data. Study data comprised age, gender, comorbidities, primary and revision implant design, aetiology, and treatment strategy. Results Individual data for 57 patients (23 studies) were analyzed. A total of 62.0% of primary implants were posterior-stabilized (49 patients) and 30.4% posterior-cruciate-retaining (24 patients). Obesity was the most frequent comorbidity (39.2%; 31 patients), followed by severe pre-operative deformity (31.6%; 25 patients). Aetiologies of dislocation were mainly related to comorbidity (15 studies; 65.2%) or intra-operative iatrogenic destabilization (14 studies; 60.9%). Non-operative treatment (splint) after dislocation was associated with high rates of recurrence (39.1%) but significantly fewer complications (p = 0.033). Implant revision surgery (45 patients; 80.4%) usually involved higher-constraint models (31 patients; 70.8%). Conclusions Improved implant design has reduced the rate of tibiofemoral dislocation, although this complication remains serious in both the short and the long term. The present review identified patient-and surgeon-related risk factors. Awareness of the former, which are identifiable pre-operatively, and of the most frequent technical errors is critical.

Allport y Postman (1945; 1947) definieron con una gran sencillez uno de los paradigmas mAis efica... more Allport y Postman (1945; 1947) definieron con una gran sencillez uno de los paradigmas mAis eficaces en los estudios experimentales sobre el pensamiento social. Recordemos muy brevemente este procedimiento ya clAisico: se construyen cadenas de personas (generalmente integradas por cinco o seis sujetos), en las cuales cada una debe transmitir a la persona siguiente el mensaje oral que ha recibido de quien le precede. Registrando las versiones sucesivas que son transmitidas de este modo, se observa a lo largo de la cadena un doble proceso de deconstrucciA³n y reconstrucciA³n de la “verdad”: deconstrucciA³n en relaciA³n a la verdad del mensaje inicial, que se deforma de una manera mAis o menos espectacular, y reconstrucciA³n en relaciA³n con la verdad que es propia del pensamiento del grupo de pertenencia, es decir, si uno lo prefiere, se trata de una verdad que se adecua a dicha pertenencia.

La lettre de l'enfance et de l'adolescence, 2007

Distribution électronique Cairn.info pour ERES. © ERES. Tous droits réservés pour tous pays. La r... more Distribution électronique Cairn.info pour ERES. © ERES. Tous droits réservés pour tous pays. La reproduction ou représentation de cet article, notamment par photocopie, n'est autorisée que dans les limites des conditions générales d'utilisation du site ou, le cas échéant, des conditions générales de la licence souscrite par votre établissement. Toute autre reproduction ou représentation, en tout ou partie, sous quelque forme et de quelque manière que ce soit, est interdite sauf accord préalable et écrit de l'éditeur, en dehors des cas prévus par la législation en vigueur en France. Il est précisé que son stockage dans une base de données est également interdit.

Polis Investigacion Y Analisis Sociopolitico Y Psicosocial, 2010

Polis Investigacion Y Analisis Sociopolitico Y Psicosocial, Dec 3, 2009

Este texto fue revisado y comentado por el autor durante su estancia en la uam-i en febrero de 2009.

Archives of Orthopaedic and Trauma Surgery, 2019

Introduction The use of rotating-hinge total knee arthroplasties (TKA), despite several developme... more Introduction The use of rotating-hinge total knee arthroplasties (TKA), despite several developments in prosthetic design, remains controversial. Results as well as indications of these devices are still discussed in primary intention and for young patients. The aim was to analyze early complications and survival rate of rotating-hinge TKA in primary intention and for revisions. Methods A retrospective study included all the patients operated for primary or revision TKA procedure using a rotatinghinge TKA between 2015 and 2018. Clinical and radiological data were collected before surgery and then at a minimum follow-up of 1 year. The primary endpoint was the aseptic revision-free survival rate. Secondary endpoints were the overall survival rate, IKS scores, range of motion and patellar complications. Results Forty patients were included at an average follow-up of 18 months. Primary implantation was performed for 12 patients (30%), and revision for 28 cases (70%). At a mean follow-up of 18 months, only one implant was removed for a septic cause. The cumulative survival rate at 24 months was 95%. At final review, eight knees (20%) had been revised, five (12.5%) due to infection, two (5%) because of extensor mechanism failure, two (5%) for global stiffness. The objective and subjective IKS were significantly higher postoperatively in both primary and revision groups (p < 0.0001). Patellar height was significantly smaller after revision (p = 0.04), while ROM significantly improved in this group (p = 0.02). At final endpoint, one implant was removed for a septic cause. Conclusion This rotating-hinge TKA provides satisfying clinical and functional outcomes in primary intentions and in revision cases. There was no implant-associated complication. The complication rate remains high for revision surgery cases, mostly due to previous joint infections and poor soft tissue quality causing extensor mechanism failure. A longer-term study should be conducted to confirm this trend.

International Orthopaedics, 2019

Introduction Tibiofemoral dislocation is the most serious form of instability following total kne... more Introduction Tibiofemoral dislocation is the most serious form of instability following total knee arthroplasty (TKA). It is little reported in the literature, despite severity comparable to that in the native knee. The present systematic review and meta-analysis aimed to identify risk factors and treatment strategies. Methods The Cochrane, Medline (via PubMed), Google, and PROSPERO databases were searched in January 2018 following the PRISMA meta-analysis guidelines. All articles referring to tibiofemoral dislocation following primary TKA were included for analysis and extraction of individual data. Study data comprised age, gender, comorbidities, primary and revision implant design, aetiology, and treatment strategy. Results Individual data for 57 patients (23 studies) were analyzed. A total of 62.0% of primary implants were posterior-stabilized (49 patients) and 30.4% posterior-cruciate-retaining (24 patients). Obesity was the most frequent comorbidity (39.2%; 31 patients), followed by severe pre-operative deformity (31.6%; 25 patients). Aetiologies of dislocation were mainly related to comorbidity (15 studies; 65.2%) or intra-operative iatrogenic destabilization (14 studies; 60.9%). Non-operative treatment (splint) after dislocation was associated with high rates of recurrence (39.1%) but significantly fewer complications (p = 0.033). Implant revision surgery (45 patients; 80.4%) usually involved higher-constraint models (31 patients; 70.8%). Conclusions Improved implant design has reduced the rate of tibiofemoral dislocation, although this complication remains serious in both the short and the long term. The present review identified patient-and surgeon-related risk factors. Awareness of the former, which are identifiable pre-operatively, and of the most frequent technical errors is critical.