Summary
Physeal distraction was applied with an external fixator to the triradiate cartilage of dogs with the aim of increasing the capacity of the acetabulum. The force was continued for from 2 to 6 weeks and the consequent changes were evaluated with regard to function and structure by radiography and microscopy. The distraction, without producing epiphysiolysis and destruction of the cartilage, resulted in expansion of the pelvic bones. The depth and volume of the acetabulum were increased, but the acetabular angle was decreased. Distraction also caused proliferation of the lacunar cells and the number of mammillary processes in the cartilage columns increased. Distraction can therefore be applied to the triradiate cartilage to enlarge the capacity of the acetabulum without producing epiphysiolysis.
Résumé
Dans cette étude une distraction a été appliquée sur le cartilage en Y. Douze chiens bâtards, âgés de 2.5 à 4 mois, ont été utilisés pour cette expérimentation. Une force de distraction de 80 Newton a été appliquée d'emblée sur le cartilage en Y. L'application de cette force a été poursuivie sur les animaux pendant 2, 4 ou 6 semaines. A la fin de cette période, les changements de la cavité cotyloïde et du cartilage en Y ont été évalués sur le plan fonctionnel, morphologique, radiologique et histopathologique Aucune altération fonctionnelle n'a été mise en évidence dans les groupes opérés par rapport au groupe de contrôle. On a observé que la distraction a déterminé une expansion massive de l'ilion, du pubis et de l'ischion. Sur les hanches de contrôle la profondeur de la cavité cotyloïde a été évaluée à 13.5 mm, le volume à 1.96 cc et l'angle de la cavité cotyloïde à 29.9°. Après distraction ces valeurs ont été respectivement de 14.4 mm, de 2.10 cc et de 25.7°. La distraction entraîne donc un accroissement de profondeur et de volume de la cavité cotyloïde, mais inversement une diminution de l'angle de cette cavité. Ces résultats montrent que la distraction détermine une prolifération des cellules lacunaires et un accroissement des processus mammaires dans les colonnes du cartilage en Y. Ils montrent également qu'elle peut augmenter la taille de l'acetabulum.
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References
Baeza ED, Garay EG, Hierro AS, Davidson WM, Flores CM (1988) Experimental acetabular dysplasia associated with a lesion of iliopubic limb of the triradiate cartilage. Clin Orthop 234: 75–81
Chiari K (1974) Medial displacement osteotomy of the pelvis. Clin Orthop 98: 55–62
De Bastiani G, Aldegheri R, Renzi BL, Tivella G (1988) Limb lengthening by distraction of the epiphyseal plate: a comparison of two techniques in the rabbit. J Bone Joint Surg [Br] 68: 545–549
De Bastiani G, Aldegheri R, Renzi BL, Tivella G (1986) Chondrodiatasis — controlled symmetrical distraction of the epiphyseal plate. Limb lengthening in children. J Bone Joint Surg [Br] 68: 550–556
Garay EG, Baeza ED, Hierro AS (1988) Acetabular dysplasia in the rat induced by injury to the triradiate growth cartilage. Acta Orthop Scand 59: 516–519
Gebstein R, Weiss RE, Hallel T (1984) Acetabular dysplasia and hip dislocation after selective premature fusion of the triradiate cartilage. J Bone Joint Surg [Br] 66: 334–336
Hallel T, Salvati EA (1977) Premature closure of the triradiate cartilage. Clin Orthop 124: 278–281
Harris NH, Lloyd-Roberts GC, Gallien R (1975) Acetabular development in congenital dislocation of the hip, with special reference to the indications for acetabuloplasty and pelvic of femoral realigment osteotomy. J Bone Joint Surg [Br] 57: 46–52
Makin M (1980) Closure of the epiphysis of the femoral head and of the triradiate cartilage of the acetabulum following surgery for congenital hip dislocation. Isr J Med Sci 16: 307–310
Monticelli G, Spinelli R (1981) Distraction epiphysiolysis as a method of limb lengthening. Clin Orthop 154: 274–285
Paley D (1988) Current techniques of limb lengthening. J Pediatr Orthop 8: 73–92
Pemberton PA (1965) Pericapsular osteotomy of the ilium for congenital subluxation and dislocation of the hip. J Bone Joint Surg [Am] 47: 65–86
Ponseti IV (1978) Growth and development of the acetabulum in the normal child. J Bone Joint Surg [Am] 60: 575–585
Salter RB (1961) Innominate osteotomy in the treatment of congenital dislocation and subluxation of the hip. J Bone Joint Surg [Br] 43: 518–539
Scuderi G, Bronson MJ (1987) Triradiate cartilage injury. Clin Orthop 217: 189–196
Summers BN, Allstair T, Wynn-Jones CH (1988) The shelf operation in the management of late presentation of congenital hip dysplasia. J Bone Joint Surg [Br] 70: 63–68
Tachdjian MO (1990) Congenital dysplasia of the hip. In: Tachdjian pediatric orthopedics, 7th edn, vol 1. Saunders, Philadelphia London Toronto Montreal Sydney Tokyo, pp 297–549
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Akbas, A., Ünsaldi, T., Körüklü, O. et al. The effect of physeal traction applied to the triradiate cartilage on acetabular growth. International Orthopaedics 19, 122–126 (1995). https://doi.org/10.1007/BF00179973
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DOI: https://doi.org/10.1007/BF00179973