Past, Present and Future Role of Polyurethanes for Surgical Implants
نویسنده
چکیده
Polyurethanes, which were once thought to be unstable when used in the body, are now occupying a dominant place in the armamentarium of the biomedical researcher. This paper discusses the history of this class of biomaterials, its chemical structure relevant to long—term surgical implants, physiological acceptability based on standard animal tests, the effects of some modifications, and possible areas of future developments with promising but yet untested formulations.
منابع مشابه
Teachers’ Professional Competencies: Past, Present, and Future
Teachers’ Professional Competencies: Past, Present, and Future M. Rezaai, Ph.D.* The purpose of this paper is to review the expected professional competencies throughout the history of teacher training in Iran. As such it covers both the past, covering the period from teacher training inception in 1918 to the Islamic revolution in 1979; and the present, since the revolution. Of course t...
متن کاملMizaj past, present and future
Temperament (Mizaj), as an individual factor, has great importance in traditional medicine and its use in diagnosis and treatment of diseases, as well as the individual lifestyle is very common. Since medicine moves toward Personalized Medicine, the root of individual differences will find its position in different aspects of medicine in early future. In traditional medicine, temperament is ...
متن کاملImmediate loading in dental implants ( A literature review )
Immediate loading in dental implants ( A literature review ) Dr. Seyedan K.,1 Dr. Hafezeqoran A.,2 Dr. Sazgara H.3 1Assistant Professor, Department of Prosthodentists,Dental School Shahid Beheshti University of Medical Sciences,Tehran, Iran.2Dentist, Post Graduate Student, Department of Prosthodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran-Iran.3Associate Profess...
متن کاملدستگاههای کاشتپذیر برای کودکان ناشنوا
The idea of providing hearing to profoundly deaf patients by artificially stimulating the sensory system has progressed from a futuristic possibility to reality. Generally, an implantable hearing device is designed to capture sound and present it to the auditory system, where at least part of the device is surgically implanted in the child receiving it. The goal of the implantable devices in yo...
متن کاملClinical reasoning assessment through medical expertise theories: past, present and future directions
Exploration into the concept of "medical expert" dates back to more than 50 years ago, yet yielding three leading theories in the area of clinical reasoning, namely, knowledge structure, hypothetic-deductive, and dual process. Each theory defines “medical expert” in a dissimilar way. Therefore, the methods of assessment through which the experts are identified have been changed during the tim...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006