全文获取类型
收费全文 | 7721篇 |
免费 | 1027篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 158篇 |
儿科学 | 51篇 |
妇产科学 | 31篇 |
基础医学 | 169篇 |
口腔科学 | 6571篇 |
临床医学 | 257篇 |
内科学 | 281篇 |
皮肤病学 | 75篇 |
神经病学 | 146篇 |
特种医学 | 63篇 |
外科学 | 570篇 |
综合类 | 3篇 |
预防医学 | 176篇 |
眼科学 | 14篇 |
药学 | 47篇 |
中国医学 | 3篇 |
肿瘤学 | 157篇 |
出版年
2024年 | 30篇 |
2023年 | 355篇 |
2022年 | 46篇 |
2021年 | 73篇 |
2020年 | 135篇 |
2019年 | 53篇 |
2018年 | 245篇 |
2017年 | 342篇 |
2016年 | 384篇 |
2015年 | 462篇 |
2014年 | 473篇 |
2013年 | 499篇 |
2012年 | 309篇 |
2011年 | 307篇 |
2010年 | 379篇 |
2009年 | 565篇 |
2008年 | 275篇 |
2007年 | 248篇 |
2006年 | 231篇 |
2005年 | 181篇 |
2004年 | 172篇 |
2003年 | 209篇 |
2002年 | 169篇 |
2001年 | 187篇 |
2000年 | 158篇 |
1999年 | 172篇 |
1998年 | 240篇 |
1997年 | 211篇 |
1996年 | 201篇 |
1995年 | 183篇 |
1994年 | 178篇 |
1993年 | 131篇 |
1992年 | 141篇 |
1991年 | 87篇 |
1990年 | 92篇 |
1989年 | 56篇 |
1988年 | 85篇 |
1987年 | 82篇 |
1986年 | 38篇 |
1985年 | 63篇 |
1984年 | 60篇 |
1983年 | 59篇 |
1982年 | 52篇 |
1981年 | 34篇 |
1978年 | 13篇 |
1977年 | 12篇 |
1976年 | 11篇 |
1975年 | 16篇 |
1974年 | 13篇 |
1972年 | 12篇 |
排序方式: 共有8772条查询结果,搜索用时 121 毫秒
51.
Harold B. Canning DDS David E. Frost DDS MS Daniel K. McDonald DDS Robert W. Joyner MD 《Journal of oral and maxillofacial surgery》1988,46(12):1048-1050
In a double-blind, randomized plan of drug administration, nalbuphine, fentanyl, and a placebo were compared for efficacy in sedation and analgesia during third molar removal. Fifty-eight patients participated in this study. Using accepted intravenous sedation and surgical techniques, fentanyl and nalbuphine were found to be better than placebo for anxiety and pain control in third molar surgery. Fentanyl had a longer duration of pain relief postoperatively than did nalbuphine. The study confirmed the need for a narcotic supplement to sedation techniques for third molar surgery. 相似文献
52.
Many care-dependent elderly individuals live in nursing homes and must depend on nursing home aides for oral hygiene care. It is generally agreed that the level of oral hygiene care among care-dependent nursing home residents is less than optimal. Two reasons are time constraints and the difficulty involved in brushing other individuals' teeth. The identification of effective and efficient plaque-removal devices for use by care-providers should make it easier for nursing home aides to incorporate effective oral hygiene care into their daily routines. This pilot study was undertaken to determine the relative effectiveness of four plaque removal devices with different basic designs when used by a non-professional careprovider on 10 healthy volunteers. A brush with curved bristles on the lateral aspect of the brush head and short straight bristles in the center (Collis-curve) and an electric toothbrush with tuffs that rotate reciprocally (Interplak) were the most effective, a conventional brush (Oral-B) was somewhat less effective, and a disposable foam brush (Abco) was least effective and similar to the prebrushing plaque score (baseline). All the volunteers reported that the Collis-curve as the most comfortable brush, and the care-provider reported that it was the easiest to use. 相似文献
53.
54.
55.
56.
57.
Attitudes of College Football Officials Regarding NCAA Mouthguard Regulations and Player Compliance 总被引:1,自引:0,他引:1
Dennis N. Ranalli DDS MDS Diana M. Lancaster PhD 《Journal of public health dentistry》1993,53(2):96-100
The National Collegiate Athletic Association (NCAA) mandates the use of brightly colored, intraoral mouth- guards by football players to reduce the frequency and severity of craniofacial and intraoral morbidity and mortality, and to enhance the ability of officials to observe player compliance. The purpose of this 12-question mail survey was to determine the attitudes of on-Held game officials regarding current NCAA mouthguard regulations and patterns of utilization by college football players. The sample consisted of all 50 Big East Football Conference officials; a response rate of 100 percent was achieved. Only 42 percent of the officials reported observing all players in compliance, and quarterbacks were identified by others as the least compliant group (52%). The majority (88%) indicated that the 1990 rule for brightly colored mouthguards had been beneficial to them in determining player compliance, and 52 percent reported that this rule had resulted in more frequent use by these athletes. Nearly all officials (96%) indicated that they would issue a warning for noncompliance to the player or coach, rather than charging a timeout for a violation as prescribed by NCAA regulations. The majority (70%) believe current enforcement is appropriate, but expressed the opinion that coaches should be held more accountable for player compliance. 相似文献
58.
59.
60.