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1.
Medicina (B Aires) ; 84(2): 261-266, 2024.
Article in Spanish | MEDLINE | ID: mdl-38683511

ABSTRACT

INTRODUCTION: Knee osteochondral lesions represent a frequent pathology within young active patients. One possible indication for severe lesions or in case of impossibility of harvesting an autograft is the use of fresh frozen allograft. The objective of this study was to retrospectively analyze functional results and failure rate after osteochondral transplants using fresh frozen allografts. METHODS: We analyzed data from patients who underwent knee osteochondral transplant using mosaicplasty technique with fresh frozen allografts at our institution between 2014 and 2019. We included those patients with at least two-year follow-up. Demographic characteristics such as age at the moment of intervention and size of the defect were included. Functional results were assessed using pre and postoperative Lysholm and IKDC scores. Patients who underwent a knee replacement were considered failures. RESULTS: Twenty-five patients were included. The median age was 43.5 years (IQR 29-50), 45% were female and the mean follow-up was 83 months (SD 54.6). Mean osteochondral defect size was 4 cm2. Mean pre and postoperative Lysholm scores were 39 (SD 19.3) and 82 (SD 15.4) respectively (p < 0.01). Mean pre and postoperative IKDC scores were 42 (SD 13.8) and 60 (SD 13.5) respectively (p < 0.01). Five patients (20%) underwent a knee replacement afterwards and were considered failures. DISCUSSION: Our results after a mean seven-year follow-up evidenced an overall improvement in functional scores and a failure rate of 20%. Osteochondral transplant using fresh frozen allografts is a reliable and feasible treatment for patients with large osteochondral defects.


Introducci贸n: Las lesiones osteocondrales de rodilla son una afecci贸n frecuente en j贸venes. Los trasplantes alog茅nicos usando injerto congelado se presentan como una opci贸n de tratamiento en pacientes con lesiones grandes o sin zona dadora. Este trabajo busc贸 analizar retrospectivamente los resultados funcionales y la tasa de falla de los trasplantes osteocondrales con injerto cadav茅rico congelado. M茅todos: Se incluyeron pacientes sometidos a trasplantes osteocondrales de rodilla con injerto cadav茅rico congelado en nuestra instituci贸n, entre 2014 y 2019, con dos a帽os de seguimiento m铆nimo. Variables evaluadas: edad al momento de la intervenci贸n, escalas funcionales International Knee Documentation Committee (IKDC) y Lysholm pre y post operatorios, complicaciones y tasa de falla. Resultados: Incluimos 25 pacientes. La edad media fue de 43.5 a帽os (RIQ 29-50), 45% fueron mujeres y el seguimiento promedio fue de 83 meses (DS 54.6). El tama帽o promedio del defecto osteocondral fue de 4 cm2. La escala de Lysholm promedio pre y postoperatorio fue de 39 (DS 19.3) y 82 (DS 15.4) respectivamente (p < 0.01). El IKDC promedio pre y postoperatorio fue de 42 (DS 13.8) y 60 (DS 13.5) respectivamente (p < 0.01). La tasa de falla fue del 20% (n=5). Discusi贸n: Los pacientes presentaron una mejor铆a postoperatoria evidenciada en los resultados funcionales, y una tasa de falla del 20%. El uso de trasplante osteocondral congelado se presenta como un recurso 煤til para el tratamiento de lesiones condrales graves.


Subject(s)
Allografts , Cartilage, Articular , Humans , Female , Male , Adult , Retrospective Studies , Middle Aged , Follow-Up Studies , Cartilage, Articular/surgery , Cartilage, Articular/transplantation , Allografts/transplantation , Treatment Outcome , Knee Joint/surgery , Bone Transplantation/methods , Cryopreservation/methods
2.
Cartilage ; 13(1_suppl): 1298S-1305S, 2021 12.
Article in English | MEDLINE | ID: mdl-34286619

ABSTRACT

OBJECTIVE: To determine the relationship between cartilage lesion etiology and clinical outcomes after second-generation autologous chondrocyte implantation (ACI) in the patellofemoral joint (PFJ) with a minimum of 2 years' follow-up. METHODS: A retrospective review of all patients that underwent ACI in the PFJ by a single surgeon was performed. Seventy-two patients with a mean follow-up of 4.2 卤 2.0 years were enrolled in this study and were stratified into 3 groups based on the etiology of PFJ cartilage lesions: patellar dislocation (group 1; n = 23); nontraumatic lesions, including chondromalacia, osteochondritis dissecans, and degenerative defects (group 2; n = 28); and other posttraumatic lesions besides patellar dislocations (group 3; n = 21). Patient's mean age was 29.6 卤 8.7 years. Patients in group 1 were significantly younger (25.4 卤 7.9 years) than group 2 (31.7 卤 9.6 years; P = 0.025) and group 3 (31.5 卤 6.6 years; P = 0.05). Body mass index averaged 26.2 卤 4.3 kg/m2, with a significant difference between group 1 (24.4 卤 3.2 kg/m2) and group 3 (28.7 卤 4.5 kg/m2; P = 0.005). A clinical comparison was established between groups based on patient-reported outcome measures (PROMs) and failure rates. RESULTS: Neither pre- nor postoperative PROMs differed between groups (P > 0.05). No difference was seen in survivorship between groups (95.7% vs. 82.2% vs. 90.5%, P > 0.05). CONCLUSION: Cartilage lesion etiology did not influence clinical outcome in this retrospective study after second generation ACI in the PFJ. LEVEL OF EVIDENCE: Level III, retrospective comparative study.


Subject(s)
Cartilage, Articular , Chondrocytes/transplantation , Patellofemoral Joint/surgery , Adult , Cartilage Diseases/surgery , Cartilage, Articular/surgery , Cartilage, Articular/transplantation , Female , Humans , Male , Retrospective Studies , Transplantation, Autologous
3.
Cartilage ; 13(1_suppl): 197S-207S, 2021 12.
Article in English | MEDLINE | ID: mdl-31387368

ABSTRACT

BACKGROUND: Complex meniscal lesions often require meniscectomy with favorable results in the short term but a high risk of early osteoarthritis subsequently. Partial meniscectomy treated with meniscal substitutes may delay articular cartilage degeneration. PURPOSE: To evaluate the status of articular cartilage by T2 mapping after meniscal substitution with polyurethane scaffolds enriched with mesenchymal stem cells (MSC) and comparison with acellular scaffolds at 12 months. METHODS: Seventeen patients (18-50 years) with past meniscectomies were enrolled in 2 groups: (1) acellular polyurethane scaffold (APS) or (2) polyurethane scaffold enriched with MSC (MPS). Patients in the MPS group received filgrastim to stimulate MSC production, and CD90+ cells were obtained and cultured in the polyurethane scaffold. The scaffolds were implanted arthroscopically into partial meniscus defects. Concomitant injuries (articular cartilage lesions or cartilage lesions) were treated during the same procedure. Changes in the quality of articular cartilage were evaluated with T2 mapping in femur and tibia at 12 months. RESULTS: In tibial T2 mapping, values for the MPS group increased slightly at 9 months but returned to initial values at 12 months (P > 0.05). In the APS group, a clear decrease from 3 months to 12 months was observed (P > 0.05). This difference tended to be significantly lower in the APS group compared with the MPS group at the final time point (P = 0.18). In the femur, a slight increase in the MPS group (47.8 卤 3.4) compared with the APS group (45.3 卤 4.9) was observed (P > 0.05). CONCLUSION: Meniscal substitution with polyurethane scaffold maintains normal T2 mapping values in adjacent cartilage at 12 months. The addition of MSC did not show any advantage in the protection of articular cartilage over acellular scaffolds (P > 0.05).


Subject(s)
Cartilage, Articular , Knee Injuries/surgery , Mesenchymal Stem Cell Transplantation , Mesenchymal Stem Cells , Osteoarthritis, Knee , Polyurethanes/chemistry , Tibial Meniscus Injuries/therapy , Tissue Scaffolds , Adolescent , Adult , Cartilage, Articular/surgery , Cartilage, Articular/transplantation , Female , Humans , Male , Meniscectomy , Meniscus/surgery , Middle Aged , Osteoarthritis, Knee/surgery , Tissue Engineering , Treatment Outcome , Young Adult
4.
J Foot Ankle Surg ; 59(2): 436-439, 2020.
Article in English | MEDLINE | ID: mdl-32131018

ABSTRACT

The treatment options for osteochondral lesions of the ankle are scarce, and newer modalities are becoming available. We describe a minimally invasive arthroscopic approach with implantation of juvenile particulated allograft to facilitate the growth of true hyaline cartilage in patients with osteochondral lesions of the talus. The purpose of this study was to subjectively review clinical outcomes using the validated Foot and Ankle Outcomes Score in patients who underwent this technique. Our technique was performed on 82 consecutive patients with average follow-up of 24 (range 9 to 86) months. We found that 28 (88%) of 32 patients who responded to the questionnaire had good or excellent results for activities of daily living; 26 (82%) of 32 patients had at least a good result for both pain and symptoms; and 25 (78%) of 32 had at least a fair result for functional sports and quality of life.


Subject(s)
Arthroscopy/methods , Cartilage, Articular/transplantation , Osteochondrosis/surgery , Quality of Life , Talus/surgery , Activities of Daily Living , Adolescent , Adult , Female , Follow-Up Studies , Humans , Male , Middle Aged , Osteochondrosis/diagnosis , Retrospective Studies , Talus/diagnostic imaging , Transplantation, Homologous , Young Adult
5.
J Foot Ankle Surg ; 58(5): 1014-1018, 2019 Sep.
Article in English | MEDLINE | ID: mdl-31345754

ABSTRACT

Advances have been made in the treatment for osteochondral defects of the talus, but these injuries continue to be a challenge for foot and ankle surgeons. We present an arthroscopically assisted technique that uses an allogenic cartilage graft in treating an osteochondral lesion of the medial dome of the talus. A brief discussion on current surgical options for osteochondral defects of the talus is also provided.


Subject(s)
Ankle Injuries/surgery , Arthroscopy , Cartilage, Articular/transplantation , Talus/injuries , Talus/surgery , Adult , Ankle Injuries/diagnostic imaging , Ankle Injuries/etiology , Female , Humans
6.
Artrosc. (B. Aires) ; 16(1): 69-81, jun. 2009. ilus
Article in Spanish | LILACS | ID: lil-530692

ABSTRACT

La OCD (osteocondritis disecante) de rodilla es diagnosticada con mayor frecuencia en pacientes adultos j贸venes. Sin tratamiento, la OCD puede llevar al desarrollo de una artrosis precoz. Este art铆culo discute la presentaci贸n cl铆nica de pacientes con OCD de rodilla, m茅todos de evaluaci贸n, haciendo principal hincapi茅 en el tratamiento quir煤rgico. La indicaci贸n quir煤rgica se basa en la estabilidad de la lesi贸n, la maduraci贸n esquel茅tica y los s铆ntomas cl铆nicos. El reestablecimiento de la superficie articular, estimular la vascularizaci贸n, lograr la fijaci贸n y reducci贸n del fragmento osteocondral acompa帽ado de una movilidad articular precoz son los objetiivos primarios cuando se preserva el fragmento osteocondral. Cuando el fragmento no puede ser preservado, el tratamiento se focaliza en la reparaci贸n del defecto mediante t茅cnicas de reconstrucci贸n como ser: microfractura, OATS, transplante osteocondral e injerto de condrocitos aut贸logos.


Subject(s)
Adult , Knee Joint/surgery , Osteochondritis Dissecans/surgery , Osteochondritis Dissecans/diagnosis , Cartilage, Articular/transplantation , Chondrocytes/transplantation , Plastic Surgery Procedures
7.
Artrosc. (B. Aires) ; 16(1): 69-81, jun. 2009. ilus
Article in Spanish | BINACIS | ID: bin-125029

ABSTRACT

La OCD (osteocondritis disecante) de rodilla es diagnosticada con mayor frecuencia en pacientes adultos j贸venes. Sin tratamiento, la OCD puede llevar al desarrollo de una artrosis precoz. Este art铆culo discute la presentaci贸n cl铆nica de pacientes con OCD de rodilla, m茅todos de evaluaci贸n, haciendo principal hincapi茅 en el tratamiento quir煤rgico. La indicaci贸n quir煤rgica se basa en la estabilidad de la lesi贸n, la maduraci贸n esquel茅tica y los s铆ntomas cl铆nicos. El reestablecimiento de la superficie articular, estimular la vascularizaci贸n, lograr la fijaci贸n y reducci贸n del fragmento osteocondral acompa帽ado de una movilidad articular precoz son los objetiivos primarios cuando se preserva el fragmento osteocondral. Cuando el fragmento no puede ser preservado, el tratamiento se focaliza en la reparaci贸n del defecto mediante t茅cnicas de reconstrucci贸n como ser: microfractura, OATS, transplante osteocondral e injerto de condrocitos aut贸logos.(AU)


Subject(s)
Adult , Osteochondritis Dissecans/surgery , Osteochondritis Dissecans/diagnosis , Knee Joint/surgery , Cartilage, Articular/transplantation , Plastic Surgery Procedures , Chondrocytes/transplantation
8.
J Bone Joint Surg Am ; 90 Suppl 2 Pt 2: 206-17, 2008 Oct.
Article in English | MEDLINE | ID: mdl-18829934

ABSTRACT

BACKGROUND: In the management of a resected distal femoral or proximal tibial condyle as the result of tumor or trauma, a unicondylar osteoarticular allograft is currently the only reconstructive option that avoids the sacrifice of the unaffected condyle. The purposes of this study were to perform a survival analysis of unicondylar osteoarticular allografts of the knee and to evaluate the complications. METHODS: We retrospectively reviewed the results of forty large unicondylar osteoarticular allograft procedures in thirty-eight patients who were followed for a mean of eleven years. Twenty-nine allografts were femoral transplants and included eleven medial and eighteen lateral femoral condyles. Eleven allografts were tibial transplants, including four medial and seven lateral tibial condyles. The procedure was performed after a tumor resection in thirty-six patients and to replace condylar loss after a severe open fracture in the remaining two patients. Complications were analyzed, and allograft survival from the date of implantation to the date of revision or the time of the latest follow-up was determined. Functional and radiographic results were documented according to the Musculoskeletal Tumor Society scoring system at the time of the latest follow-up. RESULTS: One patient died of tumor-related causes without allograft failure before the two-year follow-up evaluation. The global rate of allograft survival at both five and ten years was 85%, with a mean follow-up of 148 months. In six patients, the allografts were removed at an average of twenty-six months (range, six to forty-eight months) and these were considered failures. All six patients underwent a second allograft procedure including two new unicondylar and four bicondylar reconstructions. The mean radiographic score for the thirty-three surviving allografts evaluated was 89%, with an average functional score of 27 of a possible 30 points. CONCLUSIONS: Unicondylar osteoarticular allografts of the knee appear to be a reliable alternative for patients in whom reconstruction of massive osteoarticular bone loss is limited to one condyle of the femur or tibia.


Subject(s)
Bone Neoplasms/surgery , Bone Transplantation , Cartilage, Articular/transplantation , Fractures, Bone/surgery , Graft Survival , Knee Joint/surgery , Bone Neoplasms/complications , Femur , Fractures, Bone/complications , Humans , Plastic Surgery Procedures , Retrospective Studies , Tibia , Transplantation, Homologous , Wounds and Injuries/etiology , Wounds and Injuries/surgery
9.
Sports Med Arthrosc Rev ; 15(3): 106-13, 2007 Sep.
Article in English | MEDLINE | ID: mdl-17700369

ABSTRACT

Musculoskeletal allografts are commonly used in orthopedic surgery and have become increasingly popular. Their indications have widened as an alternatives to autografts. A tissue processing industry has secondarily evolved. An increasing number of accredited tissue banks are providing donor screening, procurement, processing, storage, and distribution of tissue. Multiple factors play a role for a graft to be successfully implanted: sterility, reduction of antigenicity, and preservation of its biologic and biomechanical properties. A rare but catastrophic complication that has raised concern is disease transmission. Controversies exist on which is the best way to produce a strong, disease-free graft. There is no current standard, but as allograft technology evolves, surgeons need to be aware of the regulations and policies surrounding allograft tissue procurement and processing to provide the best outcomes in transplanted patients.


Subject(s)
Cartilage, Articular/transplantation , Muscle, Skeletal/transplantation , Sports Medicine , Sterilization/methods , Tendons/transplantation , Tissue Preservation/methods , Tissue and Organ Procurement/methods , Athletic Injuries/surgery , Humans , Orthopedic Procedures/methods , Transplantation, Homologous
10.
Rev. Asoc. Odontol. Argent ; 94(4): 321-326, ago.-sept. 2006. ilus, tab
Article in Spanish | LILACS | ID: lil-447205

ABSTRACT

La anquilosis temporomandibular es una alteraci贸n cr贸nica que produce una limitaci贸n progresiva de la apertura bucal y de los movimientos mandibulares que puede manifestarse en las dos primeras d茅cadas de vida. El objetivo de este art铆culo es presentar un caso cl铆nico de anquilosis temporomandibular bilateral tratado en forma quir煤rgica con injerto de cart铆lago de crecimiento de cresta il铆aca y discutir los diversos tratamientos de esta patolog铆a, seg煤n la bibliograf铆a internacional actual


Subject(s)
Male , Humans , Ankylosis , Cartilage, Articular/transplantation , Ilium , Temporomandibular Joint Disorders/surgery , Bone Transplantation/instrumentation , Ankylosis , Argentina , Tomography, X-Ray Computed/methods , Transplantation, Autologous/instrumentation
11.
Rev. Asoc. Odontol. Argent ; 94(4): 321-326, ago.-sept. 2006. ilus, tab
Article in Spanish | BINACIS | ID: bin-121694

ABSTRACT

La anquilosis temporomandibular es una alteraci贸n cr贸nica que produce una limitaci贸n progresiva de la apertura bucal y de los movimientos mandibulares que puede manifestarse en las dos primeras d茅cadas de vida. El objetivo de este art铆culo es presentar un caso cl铆nico de anquilosis temporomandibular bilateral tratado en forma quir煤rgica con injerto de cart铆lago de crecimiento de cresta il铆aca y discutir los diversos tratamientos de esta patolog铆a, seg煤n la bibliograf铆a internacional actual (AU)


Subject(s)
Male , Humans , Cartilage, Articular/transplantation , Ilium/transplantation , Bone Transplantation/instrumentation , Ankylosis/surgery , Temporomandibular Joint Disorders/surgery , Ankylosis/classification , Tomography, X-Ray Computed/methods , Argentina , Transplantation, Autologous/instrumentation
12.
Rev. Asoc. Odontol. Argent ; 94(4): 321-326, ago.-sept. 2006. ilus, tab
Article in Spanish | BINACIS | ID: bin-119362

ABSTRACT

La anquilosis temporomandibular es una alteraci贸n cr贸nica que produce una limitaci贸n progresiva de la apertura bucal y de los movimientos mandibulares que puede manifestarse en las dos primeras d茅cadas de vida. El objetivo de este art铆culo es presentar un caso cl铆nico de anquilosis temporomandibular bilateral tratado en forma quir煤rgica con injerto de cart铆lago de crecimiento de cresta il铆aca y discutir los diversos tratamientos de esta patolog铆a, seg煤n la bibliograf铆a internacional actual (AU)


Subject(s)
Male , Humans , Cartilage, Articular/transplantation , Ilium/transplantation , Bone Transplantation/instrumentation , Ankylosis/surgery , Temporomandibular Joint Disorders/surgery , Ankylosis/classification , Tomography, X-Ray Computed/methods , Argentina , Transplantation, Autologous/instrumentation
13.
Rev. chil. ortop. traumatol ; 46(1): 8-13, 2005. tab
Article in Spanish | LILACS | ID: lil-410360

ABSTRACT

Las lesiones condrales articulares constituyen en la actualidad un verdadero desafio dado el aumento en su incidencia sumado a la nula capacidad regenerativa de los condrocitos y a la ausencia de un tratamiento 贸ptimo. Se han desarrollado m煤ltiples t茅cnicas para tratar estas lesiones, que van desde el aseo articular, la estimulaci贸n de la m茅dula 贸sea, o los transplantes osteocondrales y de condrocitos aut贸logos que intentan lograr una cobertura del defecto con cart铆lago hialino. El objetivo de este trabajo es evaluar retrospectivamente la evoluci贸n cl铆nica de un grupo de pacientes con lesiones osteocondrales focales de rodilla que fueron sometidos a un injerto osteocondral aut贸geno (mosaicoplast铆a) por los autores, entre junio de 1998 a diciembre de 2002, con seguimiento m铆nimo de 1 a帽o. Se obtuvieron 89 por ciento de buenos y excelentes resultados en un total de 27 pacientes, lo cual avala la utilidad de este procedimiento en el manejo de las lesiones osteocondrales focales de rodilla.


Subject(s)
Humans , Male , Female , Adult , Cartilage, Articular/surgery , Cartilage, Articular/transplantation , Osteochondritis , Knee Injuries/surgery , Retrospective Studies
14.
Rev. cuba. med ; 43(5/6)sep.-dic. 2004. tab
Article in Spanish | LILACS | ID: lil-412074

ABSTRACT

Una lesi贸n de origen traum谩tico en la superficie cartilaginosa de la rodilla puede desencadenar el desarrollo ulterior de artrosis. Se dise帽贸 un estudio preliminar, prospectivo abierto y controlado que incluy贸 7 pacientes con afectaci贸n radiol贸gica grado I o II de la clasificaci贸n de Kellgren y Lawrence que presentaran un defecto condral 煤nico en 谩rea de apoyo del c贸ndilo femoral rellenado, mediante visi贸n artrosc贸pica, con cart铆lago propio tomado de zona de no apoyo con un instrumental construido en el hospital, para determinar la eficacia del trasplante osteocondral aut贸logo en pacientes con defectos condrales de la articulaci贸n de la rodilla. Se evaluaron los resultados cl铆nicos mediante an谩lisis estad铆stico que incluy贸 el estad铆grafo Chi cuadrado. Se observ贸 que 6 pacientes eran del sexo femenino y 1 del masculino con una edad media de 44,1 a帽os, fueron evaluados al mes del proceder a los 3, 6 y 12 meses y se observ贸 que mejoraron todas las variables cl铆nicas estudiadas de forma estad铆sticamente significativa, sobre todo la intensidad del dolor y el tiempo en caminar 100 m (p = 0,001) con buena aceptaci贸n del proceder en m谩s del 75 por ciento de los enfermos. Se concluy贸 que el proceder fue eficaz sin presentarse complicaciones despu茅s de 1 a帽o de seguimiento


Subject(s)
Humans , Adult , Middle Aged , Cartilage, Articular/transplantation , Knee Injuries , Osteoarthritis, Knee , Transplantation, Autologous/methods , Arthroscopy , Follow-Up Studies
15.
Rev. chil. ortop. traumatol ; 42(1): 46-52, 2001. ilus
Article in Spanish | LILACS | ID: lil-296108

ABSTRACT

Los defectos del cart铆lago articular rara vez curan espont谩neamente. Usualmente 茅stos progresan, llegando a ser irreversibles, si no intervenimos quir煤rgicamente. Muchas t茅cnicas se han usado, incluyendo abrasi贸n, drilling o perforaciones, microfracturas, injertos autologos o aloinjertos, y trasplante celular. En 茅ste art铆culo se analizan las alternativas de diagn贸stico cl铆nico y por im谩genes en las lesiones osteocondrales, as铆 como las distintas alternativas terap茅uticas para tratar 茅stos defectos


Subject(s)
Humans , Cartilage, Articular/abnormalities , Cartilage Diseases/surgery , Osteochondroma/surgery , Arthroscopy , Bone Neoplasms/diagnosis , Bone Neoplasms/surgery , Cartilage, Articular/surgery , Cartilage, Articular/transplantation , Cartilage Diseases/diagnosis , Osteochondroma/diagnosis , Bone Transplantation/methods
17.
Rev. Asoc. Argent. Ortop. Traumatol ; 65(4): 306-10, 2000. ilus, tab, graf
Article in Spanish | LILACS | ID: lil-282755

ABSTRACT

El trasplante de matrices alogenicas desvitalizadas portadoras de condrocitos autologos, previamente aislados y sembrados sobre ellas, podria ser una solucion al problema de la reparacion de las lesiones del cartilago articular. El presente estudio analiza la actividad mitotica de los condrocitos sembrados en cartilago alogenico desvitalizado e implantados en animales vivos. Se aislaron enzimaticamente condrocitos de cartilago articular de cordero, y se sembraron "in vitro" sobre matriz cartilaginosa alogenica desvitalizada durante 3 semanas. Al final del periodo de cocultivo, se trasplantaron los compuestos de matriz y condrocitos en bolsillos subcutaneos de ratones atimicos. Las muestras experimentales y las de control fueron evaluadas luego de extraidas mediante el estudio histologico y tras la incorporacion de timidina tritiada. Los resultados obtenidos mostraron una disminucion importante de los valores de incorporacion de timidina a partir del tiempo experimental cero (evaluacion preimplante) hasta el dia 28 del implante, seguido por un leve aumento hacia el dia 42 del estudio. La experiencia ha demostrado la tendencia de los condrocitos articulares (cultivados "in vitro" y sucesivamente trasplantados "in vivo" sobre un soporte de matriz cartilaginosa alogenica desvitalizada) de modificar su propia actividad mitotica desde valores muy altos, correspondiendo a los primeros dias experimentales (tipico de las fases "in vitro" de expansion celular) hasta valores muy bajos, similares a la conducta de los condrocitos articulares "in vivo"


Subject(s)
Animals , Chondrocytes/transplantation , Cartilage, Articular/transplantation , In Vitro Techniques , Transplantation, Homologous , Argentina , Research
18.
Rev. ADM ; 56(5): 196-203, sept.-oct. 1999. ilus, tab
Article in Spanish | LILACS | ID: lil-267986

ABSTRACT

Se describen los criterios de diagn贸stico y tratamiento de la disfunci贸n interna de la articulaci贸n temporomandibular, sus manifestaciones cl铆nicas cardinales y las t茅cnicas quir煤rgicas empleadas para su soluci贸n, en aquellos casos en los que la cirug铆a est谩 indicada, en la Cl铆nica de Articulaci贸n Temporomandibular de la Escuela de Odontolog铆a de la Universidad del Baj铆o


Subject(s)
Humans , Temporomandibular Joint Disorders/surgery , Temporomandibular Joint Disorders/diagnosis , Arthroplasty , Cartilage, Articular/transplantation , Clinical Protocols , Mandibular Condyle/surgery , Temporomandibular Joint Disc/surgery , Tooth Extraction/methods , Facial Pain/diagnosis , Paracentesis , Patient Care Planning , Postoperative Care , Signs and Symptoms
20.
Rev. colomb. ortop. traumatol ; 4(3): 253-73, nov. 1990. tab, graf
Article in Spanish | LILACS | ID: lil-221774

ABSTRACT

The objetive of this experimental study is to achieve the production in vitro of inmature cartilaginous cells and its conservation, storing and effectiveness in the repairement of injured articular surfaces. After a broad bibliographic revision of the osteoarticular and chodral allografts as well as the recent studies of culture isolated cells of cartilage, we decited of carry out in a practical way and according to our enviroment along term prospective study of animal comparative experimental chararter with the initial aim to standarized a technique for the obtention of free articular cells as well as to achieve its conservation and obtain its reproduction in vitro using the F-10 HAM medium. After to create articular defaults in the knee of mature rabbits, we graffed with cells previously cultured in the laboratory, we present the preliminar hystologic, morphologic and biochemical results using the mentioned technic. If we obtain good results and an adecuate statistics tests, we will apply the same techinc in human at the label of minor articulations. With the first results we obtained a viability of 80 por cent (with coloration of Trypan-blue), formation of metachromatic reaction (with Toluidin-blue) and a satisfactory result on the 16 week of the allografts; it will be valorated by macroscopic scale of Salter-O'Driscoll; microscopic seale of Shigeyuki and the hystologic rebound criterion of kawabe. In addition we gain the celular crioconservation for more than 120 days using de DMSO 10 por cent as the crioprotector following the schemes and postulates of Schachar and Tomford; avoiding damage of the functions an viability, which was mantain in about 80 por cent


Subject(s)
Animals , Rabbits , Cartilage, Articular/transplantation , Chondrocytes/cytology , Culture Techniques , In Vitro Techniques
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