首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   139153篇
  免费   1003篇
  国内免费   55篇
耳鼻咽喉   4469篇
儿科学   4684篇
妇产科学   5869篇
基础医学   25428篇
口腔科学   3407篇
临床医学   6266篇
内科学   28619篇
皮肤病学   6212篇
神经病学   9581篇
特种医学   5860篇
外科学   22168篇
综合类   460篇
一般理论   4篇
预防医学   4712篇
眼科学   5539篇
药学   4582篇
中国医学   48篇
肿瘤学   2303篇
  2015年   3325篇
  2014年   3929篇
  2013年   5182篇
  2012年   3796篇
  2011年   3586篇
  2010年   3927篇
  2009年   3996篇
  2008年   3858篇
  2007年   3732篇
  2006年   4192篇
  2005年   3670篇
  2004年   3359篇
  2003年   1755篇
  1999年   910篇
  1998年   1180篇
  1997年   1199篇
  1996年   1598篇
  1995年   1771篇
  1994年   1810篇
  1993年   1699篇
  1992年   1789篇
  1991年   1545篇
  1990年   1393篇
  1989年   1236篇
  1988年   1127篇
  1987年   1204篇
  1986年   1147篇
  1985年   967篇
  1984年   1077篇
  1983年   882篇
  1982年   1089篇
  1981年   993篇
  1980年   957篇
  1979年   998篇
  1978年   1141篇
  1973年   907篇
  1936年   880篇
  1934年   881篇
  1933年   1493篇
  1932年   1483篇
  1931年   1472篇
  1930年   1652篇
  1929年   1389篇
  1928年   1530篇
  1927年   1497篇
  1926年   1583篇
  1925年   1544篇
  1924年   1611篇
  1923年   1465篇
  1922年   1442篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
51.
César Roux was one of the few universal surgeons at the end of the 19th century who dominated all fields of surgery and influenced current surgery with his innovative spirit. Pioneering spirit and the story of the success of modern surgery are linked with his name. On the occasion of his 150th birthday, we recall the memory of this great surgeon. The personality and the history of Professor César Roux form a part of our medical and surgical heritage.  相似文献   
52.
53.
54.
Zusammenfassung Die Osteotomie des Oberkiefers in der Le-Fort-I-Ebene, die heute routinemäßig in der Down-fracture-Technik durchgeführt wird, hat die chirurgische Behandlung skelettaler Dysgnathien grundlegend verändert. Sie ermöglicht eine dreidimensionale Korrektur des Oberkiefers und damit des gesamten Gesichtsschädels. Darüber hinaus kann der Oberkieferzahnbogen, zusätzlich zu einer Verlagerung des gesamten Oberkiefers, durch eine zusätzliche sagittale und transversale Osteotomie erweitert, verschmälert und verkürzt werden. Die Planung einer Oberkieferosteotomie erfolgt anhand des klinischen Bildes, der Kiefermodelle und des Fernröntgenbildes. Dabei muß der Unterkiefer frühzeitig mit in die Planung einbezogen werden, da er durch die Autorotation im Gelenk den Verlagerungen des Oberkiefers folgt. Erst durch eine gleichzeitige Osteotomie auch des Unterkiefers ergibt sich ein weites Indikationsspektrum für die Oberkieferosteotomie. Bei einer kombinierten Ober- und Unterkieferosteotomie ist praktisch jedes gewünschte Profil im unteren Gesichtsdrittel erzielbar.
Summary The osteotomy of the maxilla using the Le Fort I technique, today routinely performed in the down-fracture-technique, has changed surgical corrections of dentofacial deformities fundamentally. It offers a three-dimensional correction of the maxilla and also of the whole facial skull. Furthermore the upper dental arch can be expanded, intruded and shortened using a sagittal or transversal osteotomy in addition to a complete transposition of the maxilla. Planning of a maxillary osteotomy is performed under consideration of the clinical situation, the casts and the lateral cephalogram. The mandible must be considered at an early state of the preoperative planning, since the mandible will follow all transpositions of the maxilla by rotating with the TMJ. Only by performing a simultaneous osteotomy of the mandible, a broad spectrum of indications for maxillary osteotomy will result and practically every desired profile of the lower third of the face can be achieved using combined maxillary and mandibular osteotomies.
  相似文献   
55.
The reconstruction of a part of the body that has lost or inhibited function has been the most important aspect of reconstructive surgery in the past. Because of the existence of better techniques and the patient's wish for social reintegration, the plastic surgeon today is forced to consider the aesthetic results of his work more than in the past. Sometimes microsurgical procedures in reconstructive surgery are the only chance for the patient to be healed or palliated. Experience with more than 350 free tissue transfers gave us the opportunity to estimate the value of a donor flap with respect to the requirements of the receiving site. To satisfy the high aesthetic demands in these cases, it was necessary for the right place and shape the flap to fit as closely as possible, even if further corrections were necessary to achieve a satisfactory result. The transfer of latissimus dorsi and radial forearm flaps to the face and lower leg is discussed in cases of tumorus diseases and severe injuries of young and old patients.Presented to the IXth Congress of the International Society of Aesthetic Plastic Surgery, New York, October 13, 1987  相似文献   
56.
57.
58.
Patients with early ovarian carcinoma have a much better survival outcome than patients with more advanced disease. Comprehensive surgical staging is crucial for the determination of prognosis and treatment planning. During 2003, the first randomized trials were published demonstrating that adjuvant platinum based chemotherapy improves recurrence free and overall survival. Current treatment recommendations are largely based on the results of these studies. Accordingly, systemic adjuvant therapy should be offered to patients with disease stage Ib or higher and to patients with moderately differentiated or undifferentiated tumors. Due to incomplete surgical staging, the stage of disease in the patients included in these studies is probably underestimated, and only a fraction of the actual advanced stage patients is included.  相似文献   
59.
Gastric cancer still represents the second most common cause of gastrointestinal cancers in Germany. A disturbing issue is that at the time of diagnosis there are less than 15% of patients for whom a cure can be achieved. Nowadays, biological, histomorphological, molecular genetic and epidemiological data suggest that Helicobacter pylori eradication may lead to the prevention of gastric pre-neoplastic lesions and even gastric cancer. At present, eradication can be offered to selected patients and populations at increased risk, but more research is required before embarking on general and global H. pylori eradication for gastric cancer prevention. The main challenge is to determine how long mucosal abnormalities remain reversible and gastric cancer development can be halted.  相似文献   
60.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号