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Percutaneous Epiphysiodesis Using Transphyseal Screws (PETS)

Métaizeau, Jean-Paul M.D.; Wong-Chung, John M.Ch., F.R.C.S.I.*; Bertrand, Hélène M.D.; Pasquier, Philippe M.D.

Journal of Pediatric Orthopaedics: May-June 1998 - Volume 18 - Issue 3 - p 363-369
Limb-Length Discrepancy

We describe a new technique of percutaneous epiphysiodesis using transphyseal screws (PETS) and our experience with it in 32 cases of limb-length inequality and nine angular knee deformities. A subgroup of 18 patients with postfracture limb overgrowth formed a clinical model for study of the real efficacy of PETS. It proved a reliable method with few complications and many advantages such as simplicity of technique, short operating time, rapid postoperative rehabilitation, and reversibility. Bone-length inequality decreased from a preepiphysiodesis average of 2.47 cm(range, 1.5-4.6) to 0.51 cm at skeletal maturity. The tibiofemoral angle reduced from a preoperative average of 7.66° to 0.86° at maturity. The screws began to exert significant growth inhibition within 6 months of insertion, slowing down the distal femoral and upper tibial physes by 68 and 56%, respectively. They achieved maximum growth retardation over the ensuing 12 months, slowing down the distal femoral physis by 89% and the proximal tibial physis by 95%. At skeletal maturity, total femoral growth was 45% and total tibial growth was 52% that of the normal side.

From Service d'Orthopédie Pédiatrique, Hôpital Belle-Isle, Metz, France; *Department of Orthopedic Surgery, Salmaniya Medical Center, Bahrain; and †Interne des Hôpitaux de Nancy, France.

Study conducted at Hôpital Belle-Isle, Metz, France

Address correspondence and reprint requests to Dr. J.-P. Métaizeau, Chirurgien Chef de Service, Service d'Orthopédie Pédiatrique, Hôpital Belle-Isle, 57045 Metz Cedex 1, France.

© Lippincott-Raven Publishers.