Tatsuo Hanamura

Use of HUCKSTEP HIP Prosthesis

In this paper, we report the results of using HUCKSTEP HIP prosthesis for the revision surgery of total hip arthroplasty or the salvage operation for failed hip surgery.Between 1994 to 1997, 9 patients were operated on using this method and 6 patients were followed up. The follow-up periods ranged from 6 to 35 months. With the exception of 1 fracture, these patients were permitted early weight-bearing and all 6 patients had relief of pain with early ambulation. Although the period of postoperative follow-up was short, HUCKSTEP HIP proved useful for these cases.

Treatment Using the Ultrasonic Surgical System for Hard Tissue

The advantages and limitations of the ultrasonic surgical system in spinal surgery are disccused in this report.We used SUMISONIC ME-24000, which transmits ultrasonic vibrations (maximum vibration 2400times/sec, maximum amplitude 200μm) to the horn tip. Since the horn tip is very thin, accurate, precise cutting and resection of hard tissue is possible using a light touch.Cool water is discharged by the horn tip, minimizing heat gererated from cutting, and also washs away dissolved tissue.It was very useful in spinal surgery, especially in surgical decompression of spinal cord of OPLL and OYL.The risk of damage to soft tissue appears to be very low, in comparison with surgiairtome.