The Back Letter. 1(6):2, APRIL 1987 Issn Print: 0894-7376 Publication Date: April 1987 Print New Device Improves Spinal Stability PD Y. Suezawa; + Author Information Orthopdische, UniversitatsklinLk Balgrist Forchstrasse 340, CH-8008, Zurich, Switzerland. Checking for direct PDF access through Ovid Abstract Abstract unavailable for this article.