Lower Limb Lengthening Using of Ultrasound Stimulation A Case Report

Abstract

It has been reported in recent years that use of ultrasound stimulation is effective for false joint and delayed union after fracture. However, there have been very few reports of use for callotasis. We obtained good results by using ultrasound stimulation for callus formation in callotasis. The case was a 12-year-old girl, and she was diagnosed with hypochondroplasia. She had been on growth hormone therapy since age 10. The therapy had been becoming gradually less effective, she therefore underwent lengthening of both lower limbs. Thelengthening rate was 1mm per day and the total length gained was 95mm. Upon completion of lengthening, callus formation was found to be very poor. So we began the use of ultrasound stimulation. After two weeks, improvement of callus formation was seen on radiograph. The final, healing index was 32.4 days per cm.
Use of ultrasound stimulation for callotasis from the beginning of treatment allows removal of the external fixator earlier than when it is not used. Ultrasound simulation thus offers important benefits for patients.