The rigid internaI fixation of mandibular fractures has become a widely ac cepted practice among European surgeons. The caution or even outright re jection voiced at a congress of the German Society of Maxillofacial Sur 1970s is no longer prevalent. Through a process of geons held in the late critical review and implementation, rigid internaI fixation has become an established treatment modality at numerous centers, especially in Switzer land, the Federal Republic of Germany, and the Netherlands. By comparison, the method has received very little attention in North America and the Anglo-Saxon countries. By and large, surgeons in these countries continue to treat mandibular fractures by intermaxillary fixation, possibly supplemented by the use of interosseous wires. Many recent edi tions of surgical texts confirm this. Lately, however, there appears to be a surge of interest in methods of functionally stable internaI fixation, especially in the United States of America, and AO/ ASIF instruction courses are increasingly in demand. This book is intended to aid course participants in their lessons and practi cal exercises and also to guide the clinical practitioner in the application of AO/ ASIF principles. Basel, September 1988 B.SPIESSL VII Acknowledgments I have received help from many sources. The colleagues of the past 20 years who have contributed to the case material upon which this manual is based are too numerous to credit by name.
The rare occurrence of tumors of the facial skeleton, whether of dental origin (odontogenic) or arising from bone (osteogenic), makes it impossible for a single observer to appreciate fully the epi demiologic and clinical behavior of these lesions, even if he controls the case material of a large institution. The systematic cooperation of many scientists is necessary in order to compile a meaningful body of information and make that information accessible for study. On the initiative of one of the authors (B.S.), the German-Austrian Swiss Association for the Study of Tumors of the Face and Jaws (DOSAK) resolved in 1971 to establish a special registry for tumors of the facial skeleton, including odontogenic lesions. This registry has been integrated into the bone tumor registry at the Swiss Asso ciation for Pathology in the Department of Pathology of the Uni versity of Basel. In 1974 DOSAK sponsored a symposium on odontogenic and os teogenic tumors of the jaws, at which illustrative cases were pre sented and discussed. These discussions revealed the problematic nature of these tumors and prompted a number of reclassifications, including some changes from benign to malignant and vice versa. It was found that radical and in some cases mutilating operations would not have been justified on the basis of the new classification. The discussions also underscored the importance of considering all factors - epidemiologic, clinical, radiologic and pathohistologi- when establishing a diagnosis.
The rigid internaI fixation of mandibular fractures has become a widely ac cepted practice among European surgeons. The caution or even outright re jection voiced at a congress of the German Society of Maxillofacial Sur 1970s is no longer prevalent. Through a process of geons held in the late critical review and implementation, rigid internaI fixation has become an established treatment modality at numerous centers, especially in Switzer land, the Federal Republic of Germany, and the Netherlands. By comparison, the method has received very little attention in North America and the Anglo-Saxon countries. By and large, surgeons in these countries continue to treat mandibular fractures by intermaxillary fixation, possibly supplemented by the use of interosseous wires. Many recent edi tions of surgical texts confirm this. Lately, however, there appears to be a surge of interest in methods of functionally stable internaI fixation, especially in the United States of America, and AO/ ASIF instruction courses are increasingly in demand. This book is intended to aid course participants in their lessons and practi cal exercises and also to guide the clinical practitioner in the application of AO/ ASIF principles. Basel, September 1988 B.SPIESSL VII Acknowledgments I have received help from many sources. The colleagues of the past 20 years who have contributed to the case material upon which this manual is based are too numerous to credit by name.
The rare occurrence of tumors of the facial skeleton, whether of dental origin (odontogenic) or arising from bone (osteogenic), makes it impossible for a single observer to appreciate fully the epi demiologic and clinical behavior of these lesions, even if he controls the case material of a large institution. The systematic cooperation of many scientists is necessary in order to compile a meaningful body of information and make that information accessible for study. On the initiative of one of the authors (B.S.), the German-Austrian Swiss Association for the Study of Tumors of the Face and Jaws (DOSAK) resolved in 1971 to establish a special registry for tumors of the facial skeleton, including odontogenic lesions. This registry has been integrated into the bone tumor registry at the Swiss Asso ciation for Pathology in the Department of Pathology of the Uni versity of Basel. In 1974 DOSAK sponsored a symposium on odontogenic and os teogenic tumors of the jaws, at which illustrative cases were pre sented and discussed. These discussions revealed the problematic nature of these tumors and prompted a number of reclassifications, including some changes from benign to malignant and vice versa. It was found that radical and in some cases mutilating operations would not have been justified on the basis of the new classification. The discussions also underscored the importance of considering all factors - epidemiologic, clinical, radiologic and pathohistologi- when establishing a diagnosis.
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