无髓的

BACKGROUND: Hydroxyapatite has favorable biocompatibility, can protect pulp tissue and promote the formation of osteoid dentin and the concrescence of pulp tissue.

背景：羟基磷灰石具有良好的生物相容性，可保护牙髓组织，促进骨样牙本质的形成和牙髓组织的愈合，但无抗感染能力。

Results? 6 cases in X-ray film revealed round or oval stones in areatus distribution in the areas of renal papillae and medulla. 3 cases of IVP revealed cystic or hair-brushed dilation. 5cases in B-ultrasound revealed little anechoic area and strong echo light spot in radial distribution with acoustic shadow. Unenhanced CT of 6 cases revealed spotted or areatus stones surrounding minor renal calices with collecting tube system dilation and enhanced CT showed artifacts of stones magnification because of the collection of contrast medium around the stones. Conclusion?

结果 X线平片检查6例，表现为肾乳头、髓质区见簇状排列的圆形、椭圆形致密影；IVP检查3例，显示肾集合管囊状、刷子状扩张；B超检查5例见肾髓质内呈放射状分布的小无回声区和强回声光点，其后方伴有声影；CT检查6例，平扫呈环绕肾小盏分布的点状或簇状钙化灶，集合管囊状扩张，增强后因钙化周围的集合管内造影剂聚集，造成钙化影增大的假象。

Methods:The nucleus pulposus of coccygeal vertebra was applyed to the L 4 and L 5 nerve roots of the rat without compression and the mechanical withdrawal threshold and thermal withdrawal latency were observed and CSEP of hindlimbs were recorded in 3 days, 1 week,2 weeks and 4 weeks respectively after surgery in order to show ...

取大鼠自体尾部的髓核无压迫下放置在L4 和L5神经根上，制成髓核突出动物模型，分别在术后3d、1、2及 4周观察大鼠术侧肢体机械刺激敏感性和热刺激敏感性的变化，并引出大鼠后肢CSEP ，观察术侧肢体CSEP的变化。

The Immunohistochemical results indicated that the pI〓 is obviously located on the liminal surface membrane of the distal tubules and Henle's ascending limbs, and can also be found at Henle's loop of porcine kidneys, these segments expose in non-isotonic condition.

免疫组织化学染色显示，pI〓在猪肾脏明显定位于非等渗区域的远曲小管和髓袢升支粗段的管腔表面膜及髓袢处，而等渗区域的近曲小管细胞几乎无pI〓的存在，据此认为pI〓可能在耐受渗透压的变化上发挥作用。

The effect of treatment is negatively correlated with the course of disease, generally, the effect is much worse with the course of disease is much longer; The effect is positively correlated with the course of treatment, it is better if the course of treatment is longer.The group of more than one year is much excellent than the group of less one year. The ex-electroencephalogram before treatment is normal, on edge and a little abnormal, the effect is better. As regards CT or MR result, there is difference between the effective group and the ineffective group. The result of CT and MR is negative, the effect is better, and the effect to demyelination and leukoencephalopathy is most worst.However,for the tipe of much abnormality, the effect is the most worst.The effect is related to course of disease.The effect is better if the course is shorter.There is no difference in the tipe of disease the symptoms before episode, the frequency of episode, the inducing reasons, the age, sex and so on.

病程的长短与疗效存在负相关关系，病程越长疗效越差；疗程与疗效存在正相关关系，疗程越长疗效越好；疗前脑电图的异常程度与疗效存在负相关关系，正常、边缘及轻度异常者，疗效较好，重度异常者疗效最差；无效组与有效组在CT及MR检查结果上有差异，有阴性者疗效好，阳性者疗效差，脱髓鞘及脑白质病疗效最差的趋势；疗效与性别无相关性；无效组与有效组在发作类型、既往病史、辨证分型、发作先兆、疗前发作频率、诱因、发病年龄、就诊前所用药物方面无差异。

Stems unarmed, sometimes with conspicuous lenticels, or bark sometimes shredding; branches often swollen at 3-7-lacunar nodes; pith continuous or interrupted by diaphragms at nodes; tendrils simple, bifurcate to trifurcate, or 4-12-branched, usually leaf-opposed, rarely tendrils absent.

茎无刺，有时有明显的皮孔，或者树皮有时碎片状（在大多数葡萄属的种里；分枝通常在3-7节腔隙膨胀；髓连续或在节上被膈膜间断；卷须单，二叉对三叉，或者4-12分枝(在Parthenocissus)，通常对生，很少无卷须。

Beyond bleaching technique has no evident bad influence on vital tooth pulp, so it is a safe bleaching technique.

Beyond冷光牙齿漂白技术对活髓牙牙髓无明显不良影响，是一项安全可靠的漂白技术。

objective to evaluate clinical effect of the handling protaper nickel-titanium rotary instruments in preparation of canals of posterior teeth.methods 96teeth with pulpitis or periapical periodontitis were instrumented by handling protaper rotary instruments using step-down technique,and by k files using step-back technique for control.all teeth were obturated with lateral condensation methods.the efficiency of preparation was analyzed with ra-diographs before and after operation.results no transportation,apical blockage and ledge were found in test.the technique could keep canals smooth.there were two ledge,one instrument fracture and nine transportation in control.the operative time was shorter and post treatment pain seldom occurred in handling protaper group.conclusion the handling protaper niti rotary instruments can prepare the canals effectively and safety.after the preparation,the canals could be easily washed,sterilized and filled.it is an efficient instrumentation method for posterior teeth's canals and be used widely.

目的 评价手用protaper预备后牙根管的临床效果。方法选取患有牙髓炎和根尖周炎的后牙96例，随机分成试验组和对照组各48例，试验组用手用protaper多锥度镍钛旋转器械逐步伸入法预备根管，对照组用k锉，逐步后退法预备根管，两组均用侧向加压充填法充填根管，根据治疗前后的x线片，评价后牙根管预备效果。结果试验组无根管偏移、根尖阻塞、台阶，且根管壁平滑流畅，无器械折断等并发症发生。对照组有2例台阶形成，器械折断1例，根管偏移9例。试验组操作时间短且术后疼痛轻微。结论应用手用protaper预备后牙根管快速、安全，成形效果好，易于根管冲洗消毒及填充，可视为临床上预备后牙根管的有效方法。

The Plant tissue raise is the plant sterile culture technology, has the totipotency theory according to the vegetable cell, the use plant body exsomatize organ (for example root, stem, leaf, stem point, flower, fruit and so on), the organization (for example cambium, epidermis, cerebral cortex, marrow department cell, endosperm and so on) or the cell (for example big spore, small spore, somatic cell and so on) as well as the protoplast, in aseptic and suitable artificial culture medium and illumination, temperature and so on under artificial condition, can induce injuries the organization, not to decide the bud, the adventitious root, finally forms the complete adult plant the discipline.

植物组织培养即植物无菌培养技术，是根据植物细胞具有全能性的理论，利用植物体离体的器官(如根、茎、叶、茎尖、花、果实等)、组织（如形成层、表皮、皮层、髓部细胞、胚乳等）或细胞（如大孢子、小孢子、体细胞等）以及原生质体，在无菌和适宜的人工培养基及光照、温度等人工条件下，能诱导出愈伤组织、不定芽、不定根，最后形成完整的植株的学科。

Methods:The depth of the anterior and posterior rims of foramen magnum and the angle between medulla oblongata and upper spinal cord on midsagittal SE or FSE T1WI were measured in 320normal Chinese individuals and in 36patients with basilar impression.

随机选取320例没有颅颈交界区相关的临床症状及体症，MRI扫描无明显颅骨破坏性病变和颅颈交界区畸形的正常国人和36例颅底凹陷症患者的颅脑MRI图像，于正中矢状面SE或FSE T_1WI图像上测量枕大孔前、后缘中点深度和延髓-上颈髓轴线夹角数值。正常人按性别、年龄分16组，每组20例。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。