An original technique for surgical treatment by arthrotomy for permanent closed lock of the temporo-mandibular joint is described. This technique uses the temporo-meniscal compartment approach. The superior belly of the posterior meniscal attachment is dissected and retracted by a diathermy coagulation. Advantages of this technique are compared to the usual techniques of meniscopexy and meniscorrhaphy using a suture. The indications are proposed.