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Halm-Zielke instrumentation (HZI) was developed to eliminate the disadvantages of Zielke instrumentation (VDS) in terms of lack of primary stability and a kyphogenic effect. HZI is an anterior(More)
INTRODUCTION AND AIM OF THE STUDY Halm-Zielke Instrumentation (HZI), in german speaking countries also named the Münster Anterior Doublerod System, was developed to eliminate the disadvantage of(More)