The Use of Frozen Autogenous Bone Flap for Cranioplasty

Background: The artificial methods of cranioplasty such as using metals or alloplastic materials have some disadvantages, comparning with autogenic bone flaps. We tried to show that the autogenic flaps have less complications when used in cranioplasty.
 Methods: With good sealing of bone flap after extraction and preserving in -70 to -800 C, in Immounology Department, the autogenic bone was fixed in the previous site.
 Results: From 10 patients, one of them developed infection and osteomyelitic bone was extracted. No bone resorption was detected.
 Background: Comparing with other studies of autogenous bone flap cranioplasty, we have similar rate of complication. In other studies, the rate of infection was almost equal to our results. So using autogenous bone in our center is advisable.
 Key words: cranioplasty, autogenous bone, frozen bone, infectio

A New System for Neuronavigation and Stereotactic Biopsy Pantograph Stereotactic Localization and Guidance System

Everyday, neurosurgeons face the problem of orientation within the brain but the advent of stereotactic surgery and neuronavigation have solved this problem. Frame-based stereotactic systems (FBSS) and neuronavigation systems have their own strengths and priority and pitfalls, which were the main driving force for us to design a new system. This hybrid system comprises three main parts: main frame, monitoring system, and pantograph, which are connected to each other and to the operating table by particular attachments. For using this system, after performing CT SCAN or Magnetic Resonance Imaging (MRI) the axial view will be transferred to Liquid Cristal Display (LCD). In the operating room, the head of the patient fixes to the operating table and registration is completed by two arms of pantograph. We made a simulation operation with our system on an occipital cavernous angioma and a frontal oligodendroglioma. The software, which have been used for simulation were as follows; Poser (version-7), Catia (version 5- R18), and 3 Dimension Max (version 2008). The accuracy of this system is approximately two millimeter. The advantages of this system are: easy to use, much less expensive, and compatible with different devices, which may be needed during neurosurgical operation. For countries that do not have the opportunity to have sophisticated technology and neuronavigation system, we believe that our system is a one-stop solution