Abstract
Between 1985 and 1988, 110 PCA unicompartmental knee arthroplasties were performed by the same surgeon. At review in 1993, after at least 5 years follow-up, 11 patients were dead, 90 patients were seen, examined and X-rayed; 5 patients replied by filling in a questionnaire and 3 had not been seen for a year. There were 73 women (74.4%) and 25 men; mean age was 68.6, mean height was 162.5 cm and mean weight 70 kg. Only 13 showed signs of obesity (BMI>30). 74 medial prostheses were placed for correction of genu varum (mean deviation: 8.5°) and 24 lateral prostheses were placed for correction of genu valgum (mean deviation: 13.5°).
90 prostheses were cementless (92%). There was no release, no surgery was performed on the patella or the lateral compartment.
Early postoperative complications were rare: 1 early infection, 15% of thrombo-phlebitic complications without pulmonary embolism, no early dislocation.
Results at more than five years were evaluated using Hungerford’s score which rose from 48 to 81.5 postoperatively. We noted 72.4% of good and excellent results (43 excellent, 28 good) and 10.2% of poor results. Mean flexion was 111.5° (>120° in 72% of patients). Mean pain was evaluated at 42 (maximum score: 50) and 54% of patients had an unlimited gait perimeter.
Secondary and late complications: - inexplicable pain: 10 out of 98 patients, - 1 tibial loosening; no reoperation performed, - 2 antero-posterior laxities, 1 painful, - no pathological stiffness.
Reoperations: 18 patients were reoperated: - 1 by arthroscopy and division of the lateral process because of inexplicable medial pains (followed by no improvement), - 1 arthrodesis because of septic complications, - 16 patients were reoperated and converted to total knee prosthesis: 3 because of inexplicable pain (followed by no improvement); 3 because of dislocation of the femoral prosthetic condyle; 1 inexplicable and 9 because of femoral loosening or mobility of the femoral prosthetic condyle.
Our series of PCA unicompartmental arthroplasties yielded nearly 73% of good and excellent results at more than five years’ follow-up, although the prostheses were fitted without cement in 9 out of 10. Contrary to the usual belief, the weak spot is not the tibial plateau but the femoral prosthetic condyle whose design is inadequate and responsible for most of the complications observed.
Résumé
Dans cette série, nous analysons le résultat de 110 prothèses unicompartimentales PCA mises en place entre 1985 et 1988. 94 prothèses ont été mises en place pour gonarthrose sur déviation axiale globale : 71 pour un varus, 23 pour un valgus. 74 arthroplasties étudiées à la révision concernent le compartiment interne contre 24 le compartiment externe. Tous les patients ont été revus avec un minimum de 5 ans. L’analyse des résultats a été faite grâce au score d’Hungerford : 72,4 % de bons et d’excellents résultats. 18 malades ont été réopérés pour la plupart du fait d’une mobilité ou d’un descellement fémoral. L’analyse de cette série confirme les bons résultats de cet implant dont la majorité a été mise sans ciment (96,8 % pour le fémur, 91 % pour le tibia) et dont les complications à terme proviennent pour nous de la pièce fémorale.
Similar content being viewed by others
Bibliographie
Aubriot JH, Deburge A, Le Balc’h T, Mazas F, Witwoet J (1988) Prothèse unicompartimentale du genou «Lotus». Analyse des résultats d’une série de 142 cas. Rev Chir Orthop [Suppl II]: 74
Barret WP, Scott RD (1987) Revision of failed unicondylar unicompartmental arthroplasty. J Bone Joint Surg [Am] 69-B: 1328–1135
Brooks PJ, Walker PS, Scott RD (1984) Tibial component fixation in deficient tibial bone stock. Clin Orthop 184: 302–308
Cartier Ph, Cheaib S, Vanvooren P (1987) Le remplacement prothétique unicompartimental du genou. A propos de 159 cas. Recul maximal de 10 ans. Rev Chir Orthop 73 [Suppl II]: 131–133
Deschamps G, Lapeyre B (1987) La rupture du LCA, une cause d’échec souvent méconnue des prothèses unicompartimentales du genou. A propos d’une série de 79 prothèses. Rev Chir Orthop 7: 544–551
Dorr LD, Ranawat CS, Sculco TP (1986) Bone graft for tibial defect in total knee arthroplasty. Rev Chir Orthop 205–211
Gacon G (1992) Résultats des prothèses unicompartimentales PCA du genou. A propos de 115 cas avec un recul mulimal de deux ans. Orthop Traumatol 2: 61–70
Gacon G, Travers V, Barba L, Lalain JJ, Laurencon M, Ray A (1993) Reprises pour échecs de prothèses unicompartimentaires du genou. Stratégies thérapeutiques et résultats à propos de 40 cas. Rev Chir Orthop 79: 635–642
Goodfellow JW, Tibrewal ST, Sherman KP, O’Connor JS (1987) Unicompartmental arthrosis. Oxford meniscal knee arthroplasty. Arthroplasty 12–19
Goutallier D, Hernigou Ph (1981) Les échecs précoces des prothèses à glissement unicompartimentales (Lotus) dans le traitement des gonarthroses latéralisées non disloquées. Rev Chir Orthop 67: 659–665
Goutallier D, Hernigou Ph (1985) L’arthroplastie unicompartimentale (Lotus) dans le traitement de la gonarthrose latéralisée du sujet âgé. Rev Chir Orthop 71: 213–218
Insall J, Aglietti P (1980) A five to seven year follow-up of unicondylar arthroplasty. J Bone Joint Surg [Am] 62: 1329–1337
Insall J, Walker P (1976) Unicondylar knee replacernent. Clin Orthop 120: 83–85
Insall JN, Dorr LD, Scott RD, Scott WN (1989) Rationale of the Knee Society Clinical Rating System. Clin Orthop 248: 13–14
Lai CH, Rand JA (1993) Revision of failed unicompartmental total knee arthroplasty. Rev Chir Orthop 287: 193–201
Laskin RS (1978) Unicompartmental tibio-femoral resurfacing arthroplasty. J Bone Joint Surg [Am] 60: 182–185
Lindstrand A, Stenstrom A (1988) The PCA unicompartmental knee. A 1–4 years comparison of fixation with or without cement. Acta Orthop Scand 59: 695–700
Marmor L (1985) Unicompartmental and total knee arthroplasty. Clin Orthop 192: 76–81
Marmor L (1979) Marmor modular knee in unicompartmental disesase. Minimum four years follow-up. J Bone Joint Surg [Am] 61: 347–353
Maudhuit B, Leroy P, Orst G (1989) La révision des échecs des prothèses unicompartimentales du genou. Ann Orthop Ouest 21: 73–77
Padgett DE, Stern SH, Insall JN (1991) Revision total knee arthroplasty for failed unicompartmental replacement. J Bone Joint Surg [Am] 73: 186–189
Sarangi PP, Karachalios Th, Jackson M, Newman JH (1994) Modes de détérioration des prothèses unicompartimentales internes du genou, laissant persister une hypocorrection. Rev Chir Orthop 80: 217–222
Scott RD, Santore RF (1981) Unicondylar unicompartmental replacement for osteoarthritis of the knee. J Bone Joint Surg [Am] 63: 536–544
Scott RD, Cobb AG, Mac Queary FG, Thornhill TS (1991) Unicompartmental knee arthroplasty. 8 to 12 years follow-up evaluation with survivorship analysis. Clin Orthop 271: 96–100
Witwoet J (1985) Résultats des prothèses unicompartimentaires à plus de 5ans. Rev Chir Orthop 71: 170–174
Witwoet J, Peyrache MD, Nizard R (1993) Prothèses unicompartimentaires du genou de type «Lotus» dans le traitement des gonarthroses localisées. Résultats de 135 cas avec un recul moyen de 4,6 ans. Rev Chir Orthop 79: 565–576
Zukor DJ, Oakeshott RD, Gross AE (1991) Fresh osteochondral allografts for post traumatic defects of the knee. Controversion of total knee arthoplasty. HVM Goldberg (ed) Raven Press, New-York, p 19
Author information
Authors and Affiliations
Additional information
Table Ronde de la XVIIIème Réunion Elargie du GECO, Les Arcs, Janvier 1994
Rights and permissions
About this article
Cite this article
Gacon, G. Bilan de 110 prothèses PCA unicompartimentales. Eur J Orthop Surg Traumatol 5, 217–219 (1995). https://doi.org/10.1007/BF02716517
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02716517