全文获取类型
收费全文 | 10758篇 |
免费 | 1494篇 |
国内免费 | 36篇 |
专业分类
耳鼻咽喉 | 171篇 |
儿科学 | 94篇 |
妇产科学 | 88篇 |
基础医学 | 567篇 |
口腔科学 | 6735篇 |
临床医学 | 379篇 |
内科学 | 1192篇 |
皮肤病学 | 127篇 |
神经病学 | 358篇 |
特种医学 | 172篇 |
外科学 | 1219篇 |
综合类 | 20篇 |
预防医学 | 160篇 |
眼科学 | 25篇 |
药学 | 318篇 |
中国医学 | 5篇 |
肿瘤学 | 658篇 |
出版年
2024年 | 28篇 |
2023年 | 366篇 |
2022年 | 56篇 |
2021年 | 106篇 |
2020年 | 144篇 |
2019年 | 72篇 |
2018年 | 304篇 |
2017年 | 370篇 |
2016年 | 417篇 |
2015年 | 506篇 |
2014年 | 548篇 |
2013年 | 551篇 |
2012年 | 437篇 |
2011年 | 428篇 |
2010年 | 466篇 |
2009年 | 635篇 |
2008年 | 423篇 |
2007年 | 360篇 |
2006年 | 357篇 |
2005年 | 362篇 |
2004年 | 331篇 |
2003年 | 389篇 |
2002年 | 345篇 |
2001年 | 287篇 |
2000年 | 293篇 |
1999年 | 291篇 |
1998年 | 294篇 |
1997年 | 244篇 |
1996年 | 252篇 |
1995年 | 229篇 |
1994年 | 222篇 |
1993年 | 170篇 |
1992年 | 248篇 |
1991年 | 186篇 |
1990年 | 179篇 |
1989年 | 140篇 |
1988年 | 183篇 |
1987年 | 145篇 |
1986年 | 108篇 |
1985年 | 131篇 |
1984年 | 99篇 |
1983年 | 114篇 |
1982年 | 69篇 |
1981年 | 53篇 |
1979年 | 37篇 |
1977年 | 31篇 |
1975年 | 30篇 |
1974年 | 26篇 |
1973年 | 25篇 |
1972年 | 32篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
Anette M.C. Fransson DDS A
ke Tegelberg DDS PhD Anders Johansson DDS PhD Bengt Wenneberg DDS PhD 《American journal of orthodontics and dentofacial orthopedics》2004,126(6):687-693
The aim was to identify the incidence and types of possible adverse events in the masticatory system after treatment with a mandibular protruding device (MPD) during a 2-year period in patients with obstructive sleep apnea (OSA) or snoring. The subjects comprised 65 middle-aged patients (44 OSA patients, 21 snorers). A clinical examination and a questionnaire concerning signs and symptoms from the masticatory system were performed before, after 6 months, and after 2 years of MPD use. The frequencies of registered signs from the masticatory system, such as muscle and joint tenderness, palpation, and pain during mandibular movement, decreased significantly between baseline and the 2-year follow-up. There were significant changes in the mandibular range of protrusion (+0.7 mm, P < .001), overjet (-0.5 mm, P < .001), and overbite (-0.6 mm, P < .001) compared with the initial examination. Nine patients developed a lateral open bite during treatment, and 2 of them experienced subjective symptoms related to the altered occlusion but still used the MPD every night. No patient reported pain on opening the mouth wide or during jaw movements. Two reported tiredness on jaw function. The reported frequency of headaches was also significantly reduced (P < .01). The high compliance rate in MPD use showed that the therapy is well tolerated, but there is a risk of minor alterations in the occlusion during MPD treatment. 相似文献
92.
93.
94.
95.
Dr. Nermin Yamalik DDS PhD Ugur F. Avcikurt DDS † Feriha Caglayan DDS PhD ‡ Kenan Eratalay DDS PhD § 《Australian dental journal》1993,38(2):108-113
During the treatment of patients with renal failure or renal transplants the most important consideration is to eliminate sources of infection before and after the treatment. Acute or chronic oral infections or bacteraemias resulting from dental procedures may cause serious complications in these patients who already have lowered host resistance caused by immunosuppressant therapy. In order to determine the latest concepts from some international transplantation centres relating to the importance of and the effect of infective sources in the oral cavity, a survey form was prepared which included several questions related to oral foci of infection and renal transplantations.
Results obtained from 22 centres from 12 countries indicated that the majority of the centres included a dental examination in their routine protocol and required completion of any necessary dental treatment before transplantation. However, full agreement among all these centres on the necessity for dental examination as part of the protocol has not yet been reached. 相似文献
Results obtained from 22 centres from 12 countries indicated that the majority of the centres included a dental examination in their routine protocol and required completion of any necessary dental treatment before transplantation. However, full agreement among all these centres on the necessity for dental examination as part of the protocol has not yet been reached. 相似文献
96.
97.
K. Miyashita T. Sekita S. Minakuchi Y. Hirano K. Kobayashi & M. Nagao 《Journal of oral rehabilitation》1998,25(7):545-552
SUMMARY The purpose of this study was (1) to assemble and verify a system to measure the three‐dimensional (3‐D) movement of the upper and lower complete dentures and the movement of the mandible simultaneously, and (2) to analyse the relation between denture movements and the path of closure of the mandible during function. A 3‐D motion capture system with four infrared TV cameras was used for this purpose. The relation between the dentures and the mandibular movements was analysed through the change of the inner product of normal vectors of the denture occlusal planes and mandibular planes. The mandibular movements were classified into two types the normal stroke (the path of closure was on the ipsilateral side of mastication) and the reverse stroke (on the contralateral side). The results showed that the system could measure the denture mobility within a 0·3 mm error. The mobility of the upper dentures had a correlation to the path of closure of the mandible regardless of the working side or nonworking side, and the lower dentures had a tendency to move toward the working side. 相似文献
98.
Yuichi Ando Kenji Kikuchi Naoya Ichikawa Kazuhiko Meigata Yuji Nomura Kenshi Watanabe Yoshifumi Beck Hisakazu Degawa Shinji Tomikawa Takeshi Nagao Hisanori Chida 《Surgery today》1997,27(4):353-356
We herein report the case of a 53-year-old man with a nonspecific acute colonic ulcer whose liver function deteriorated after he had undergone hepatectomy. He was referred to our hospital for a hepatoma caused by hepatitis B virus and a right hemihepatectomy was performed. His liver function was poor after the operation, and minor complications such as pleural effusion and biliary fistula developed. A large amount of melena was seen 29 days after the hepatectomy and he developed hemorrhagic shock. Superior mesenteric arteriography revealed pooling of blood in both the hepatic flexure of the ascending colon and the cecum. An emergency right hemicolectomy was performed. There was a 5 x 1-mm ulcer 18 cm distal to the ileocecal valve. Numerous erosions were observed to be scattered throughout the colonic mucosa. The patient recovered slowly and was discharged 6 months after the hepatectomy. This is the first report of an acute colonic ulcer that could have been caused by liver dysfunction. 相似文献
99.
A patient with Type I hypoplastic patterned amelogenesis imperfecta, subtype D, presented for prosthodontic evaluation. This article describes the developmental and pathophysiological background of this disease. A clinical report describing the diagnosis, treatment planning, and dental rehabilitation of the patient is reviewed. 相似文献
100.
A case is reported of unexpected atrial fibrillation in response to tooth extraction under intravenous sedation in a 70-yr-old patient with thoracic aneurysm of the aorta. Atrial fibrillation developed after the additional injection of a 2% solution of lidocaine containing 1:200,000 epinephrine. After 20 min, the arrhythmia disappeared spontaneously. The arrhythmia was associated with insufficient analgesia for tooth extraction, epinephrine in the local anesthetic, decreased blood pressure, and the presence of cardiovascular disease. Even when a low concentration of epinephrine is employed, caution should be paid to development of unexpected cardiovascular reactions in elderly patients with severe cardiovascular disease. We conclude that an electrocardiogram, blood pressure device, and pulse oximeter should be used in high-risk patients in order to prevent and detect potentially dangerous cardiovascular emergencies, even if dental treatment is scheduled under local anesthesia. 相似文献