Fig. 4From: Clinical application of injectable growth factor for bone regeneration: a systematic reviewPercutaneous administration of growth factors into the femoral head. Local injection can be percutaneously administered to the target site. This reduces the operating time and damage to surrounding tissue and enables surgery to be minimally invasive. a A syringe with long needle available for percutaneous administration. b An intraoperative radiographic image reaching to the target site. c An intraoperative photograph when pushing the plunger to injectBack to article page