全文获取类型
收费全文 | 28117篇 |
免费 | 1664篇 |
国内免费 | 646篇 |
专业分类
耳鼻咽喉 | 943篇 |
儿科学 | 175篇 |
妇产科学 | 268篇 |
基础医学 | 2838篇 |
口腔科学 | 2788篇 |
临床医学 | 2013篇 |
内科学 | 972篇 |
皮肤病学 | 103篇 |
神经病学 | 1438篇 |
特种医学 | 2883篇 |
外国民族医学 | 4篇 |
外科学 | 9820篇 |
综合类 | 2977篇 |
一般理论 | 1篇 |
预防医学 | 530篇 |
眼科学 | 853篇 |
药学 | 756篇 |
17篇 | |
中国医学 | 187篇 |
肿瘤学 | 861篇 |
出版年
2024年 | 83篇 |
2023年 | 568篇 |
2022年 | 1084篇 |
2021年 | 1304篇 |
2020年 | 1264篇 |
2019年 | 1033篇 |
2018年 | 1106篇 |
2017年 | 1067篇 |
2016年 | 1037篇 |
2015年 | 924篇 |
2014年 | 1842篇 |
2013年 | 1937篇 |
2012年 | 1582篇 |
2011年 | 1758篇 |
2010年 | 1382篇 |
2009年 | 1436篇 |
2008年 | 1501篇 |
2007年 | 1387篇 |
2006年 | 1195篇 |
2005年 | 995篇 |
2004年 | 853篇 |
2003年 | 732篇 |
2002年 | 513篇 |
2001年 | 503篇 |
2000年 | 390篇 |
1999年 | 395篇 |
1998年 | 355篇 |
1997年 | 322篇 |
1996年 | 268篇 |
1995年 | 227篇 |
1994年 | 200篇 |
1993年 | 125篇 |
1992年 | 159篇 |
1991年 | 91篇 |
1990年 | 97篇 |
1989年 | 87篇 |
1988年 | 86篇 |
1987年 | 56篇 |
1986年 | 75篇 |
1985年 | 64篇 |
1984年 | 66篇 |
1983年 | 39篇 |
1982年 | 49篇 |
1981年 | 38篇 |
1980年 | 39篇 |
1979年 | 24篇 |
1978年 | 19篇 |
1977年 | 19篇 |
1976年 | 22篇 |
1975年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
Kohjirou Okahashi Kazuya Sugimoto Makoto Iwai Manabu Oshima Masayuki Samma Yoshiyuki Fujisawa Yoshinori Takakura 《Knee surgery, sports traumatology, arthroscopy》2006,14(6):542-545
The purpose of our study is to evaluate whether the hamstring tendons can regrow after harvesting for anterior cruciate ligament (ACL) reconstruction and whether the regenerate tissue can be histologically characterized as tendinous. Eleven of the patients (eight female and three male; mean age, 23 years; range 17–37 years) consented to participate in this study. One year after the ACL reconstruction, surgical biopsy was done. Regeneration of the tendon was detected macroscopically in 9 of the 11 patients. Histologically and immunohistochemically, the regenerated tendons closely resembled normal ones. The results of this study show the hamstring tendons can regenerate after harvesting for the ACL reconstruction. 相似文献
83.
84.
85.
Femoral attachment of the anterior cruciate ligament 总被引:3,自引:1,他引:2
Francesco Giron Pierluigi Cuomo Paolo Aglietti Anthony M. J. Bull Andrew A. Amis 《Knee surgery, sports traumatology, arthroscopy》2006,14(3):250-256
Endoscopic anterior cruciate ligament (ACL) reconstruction is one of the most popular orthopaedic procedures. Correct tunnel positioning is a prerequisite to success. Current surgical techniques are unable to duplicate the complex anatomy and function of the native ACL. Surgery mainly aims at restoring anteroposterior laxity. The ACL is not isometric and only a few fibers are nearly isometric over the full range of motion. However, a nearly isometric behaviour of the ACL graft is desirable. Isometry is mainly influenced by femoral attachment; thus the femoral tunnel position has a greater effect than the tibial on graft length changes. The purpose of this article is to describe the anatomy of the femoral ACL insertion and to discuss the surgical techniques used to replicate it. 相似文献
86.
OBJECTIVES: We reviewed the results of surgical treatment for children with ureterocele, especially addressing the importance of the lower urinary tract reconstruction. METHODS: We present medical records of 91 children with ureterocele (31 with the intravesical type, and 60 with the ectopic type) treated during the last 14 years. As the initial treatment, we carried out transurethral incision of the ureterocele (TUI). In patients with persistent reflux, breakthrough urinary tract infection (UTI), or signs of bladder outlet obstruction due to a collapsed cele wall, we recommended that patients undergo lower urinary tract reconstruction irrespective of the renal function involved in ureterocele. The average follow-up period was 5 years (ranging 1 year and 6 months to 14 years). RESULTS: Transurethral incision of the ureterocele was carried out as the initial treatment on 68 patients (75%). A total of 34 patients (21 intravesical [68%] and 13 ectopic [22%]) were followed medically after TUI alone. Reconstruction of the lower urinary tract was carried out in 59 patients (65%). Nephroureterectomy combined with bladder level reconstruction was carried out in four children with single system and non-functioning kidney. Follow-up voiding cystourethrography showed that only one girl had reflux, which disappeared after the first follow-up examination. Postoperative UTI occurred in 12 patients (20%) with ectopic ureterocele. Voiding dysfunction was suspected in eight patients. CONCLUSION: We believe that the primary objective for patients with ureterocele, especially of the ectopic type, is to reconstruct the original pathology of the lower urinary tract that may give rise to reflux, obstruction, or abnormalities of urination. Although surgery at the bladder level can be challenging, the lower urinary tract reconstruction successfully corrects the vesicoureteral reflux and bladder outlet pathology under a cosmetically acceptable incision. 相似文献
87.
P. G. Ngan S. Jayagopal E. N. George D. McGeorge A. Juma 《European journal of plastic surgery》2007,30(4):189-194
A survey was carried out to ascertain the preference for donor site scar orientation in patients undergoing pedicled latissimus
dorsi breast reconstruction and their views on breast reconstruction in general. One hundred twelve women (59 Chinese, 53
Western) completed the questionnaire. Participants were asked to state their preferred scar orientation (i.e., oblique, horizontal,
or vertical) based on photographs showing the position of the scars. Demographic information and views on issues surrounding
breast reconstruction in general were also collected. Data was analyzed non-parametrically with chi-square test and t test. The mean age of participants was 39.5 years (20–73 years). Seventy-seven percent of the participants would opt for
an immediate breast reconstruction if offered (p < 0.001). Eighty-six percent would have objection to the use of silicone implant as a whole or part of a reconstruction (p < 0.001). Vertical and horizontal scars were the preferred orientation, with no women choosing the oblique orientation as
their first choice (p < 0.001). The non-Chinese of 40 years or older, as well as Chinese women from all age groups, preferred the horizontal scar
(p < 0.05). We demonstrated that both culture and age impact on the preferred scar orientation in breast reconstruction. Women
in the age group we commonly reconstruct favored the horizontal scar. However, the younger women of non-Chinese origin tended
to favor the vertical scar. 相似文献
88.
Boris A. Zelle MD Andrea S. Herzka MD Christopher D. Harner MD James J. Irrgang PhD PT ATC 《Operative Techniques in Orthopaedics》2005,15(1):76
Clinical outcomes data can be used to facilitate patient management decisions, assess clinician and organizational performance, and to provide evidence for the effectiveness of surgery and rehabilitation. The validity of the inferences made from outcomes data are dependent on the validity of the outcomes measures themselves and the circumstances under which the data were collected, analyzed, and interpreted. Clinical outcomes may include measures of impairment of body structure and function, activity limitation, and participation restriction. However, because the relationship between impairment and the resulting activity limitation and participation restriction is not direct, and because activity limitations and participation restrictions are of the utmost concern to the athlete, the primary clinical outcome should be measures of activity limitation and participation restriction. Activity limitation and participation restriction may be measured either through direct observation of performance or by general or specific measures of health related quality of life. Clinical outcomes data must be collected systematically to ensure valid inferences from the data. 相似文献
89.
The effect of intraosseous graft length on tendon-bone healing in anterior cruciate ligament reconstruction using flexor tendon 总被引:1,自引:1,他引:0
Shuji Yamazaki Kazunori Yasuda Fumihisa Tomita Akio Minami Harukazu Tohyama 《Knee surgery, sports traumatology, arthroscopy》2006,14(11):1086-1093
The current study was performed to understand the relationship between graft length placed within the bone tunnel and intraosseous graft healing in anterior cruciate ligament (ACL) reconstruction. Twenty-four adult beagle dogs were divided into two groups of 12 animals each. In each animal, ACL reconstruction using a 4-mm diameter autogenous flexor tendon graft was done in the left knee. In groups I and II, the graft having a length of 15 and 5 mm, respectively, was placed within the tibial tunnel. The proximal end of the graft was placed through the over-the-top route in all animals. In each group, five animals were sacrificed immediately after surgery, and the remaining seven were sacrificed at 6 weeks postoperatively. Biomechanical and histologic evaluations were performed. In pull out testing, the ultimate failure load and the linear stiffness of the graft-tibia complex harvested at 6 weeks were significantly greater than those harvested at the time-zero period. There were no significant differences in those parameters between groups I and II at 6 weeks. In each group, the perpendicular collagen fibers connecting the tendon to the bone tunnel wall were observed only in the narrow area located close to the intra-articular tunnel outlet. In conclusion, excessively long placement of the flexor graft within the bone tunnel does not result in an additional increase of anchoring strength and stiffness of the graft in ACL reconstruction. 相似文献
90.