Manisha Solanki

Der Hauptzweck dieses Buches besteht darin, als praktischer Leitfaden f r die Anwendung der Lokalan sthesie in der Zahnmedizin zu dienen. Bevor man sich den praktischen Fragen zuwendet, ist es wichtig, ein grundlegendes Verst ndnis der Pharmakologie und Anatomie der zahn rztlichen Lokalan sthesie zu erwerben. An sthesie ist definiert als ein Gef hlsverlust in einem umschriebenen K rperbereich durch eine Erregungsdepression in den Nervenenden oder eine Hemmung der Reizleitung in den peripheren Nerven. Diese Definition schlie t alle Empfindungen ein. In der Zahnmedizin ist es die Schmerzempfindung, die wir ausschalten wollen. Der Verlust der Schmerzempfindung wird als Analgesie bezeichnet. Die Begriffe Lokalan sthesie und lokale Analgesie werden in der zahn rztlichen Praxis fast synonym verwendet. Da nach einer intraoralen Injektion gelegentlich auch eine echte An sthesie auftreten kann, wird in diesem Buch der erstgenannte Begriff verwendet.

Dentistry is one of the fastest growing science of medicine. With the introduction of many newer instruments and anaesthesia extraction is a routinely carried out procedure in dental office. Tooth extraction remains an essential component of both the art and science of dentistry despite the enormous progress in the prevention of dental disease made during the last three decades of the twentieth century. Dental extraction has always been considered to be an unpleasant procedure for the patients due to pain phobia. With the advent of local anaesthetic drugs techniques and standardization of surgical procedure, extraction is no longer considered to be painful experience to the patients. Gone are the days when extraction was supposed to be one of the crude procedure. The control of the patient is fear and anxiety has long been a challenge to the dental practitioner. Today's extraction procedure is painless and anxiety-free provided that one employs good principles of patient management and pharmacokinetics.

The main purpose of this book is to act as a practical guide to the use of local anaesthesia in dentistry. Before embarking on practical issues it is important to acquire a basic understanding of the pharmacology and anatomy of dental local anaesthesia. Anaesthesia is defined as a loss of sensation in a circumscribed area of the body by a depression of excitation in nerve endings or an inhibition of the conduction process in peripheral nerves. This definition includes all sensation. In dentistry it is pain sensation we want to eliminate. Loss of pain sensation is termed analgesia. The terms local anaesthesia and local analgesia are used almost synonymously in dental practice. As true anaesthesia may be produced on occasion following intra-oral injection, the former term is used in this book.