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101.
近3年来,用制备的胎骨充填良性骨肿瘤及病样病变术后骨缺损,经观察10例效果良好。胎骨因其自身组织学和生理学特点,具有抗原性小、诱导成骨活性高,利于“爬行各代”等优点。而且来源丰富、采制简单、储存容易、费用低度,是一种良好的植骨材料,特别适于儿童及年老体弱患者自身取骨困难的骨缺损植骨需要。但其为异体骨,有一定免疫原性,抗支撑强度略差,应注意严格无菌操作、消除免疫原性、配合使用内、外固定等措施。 相似文献
102.
应用综合评估法术前评估骨巨细胞瘤的侵袭性 总被引:1,自引:0,他引:1
应用穿刺活检进行病理诊断和分级,同时作DNA含量图象法分析,结合X线平片表现对骨巨细胞瘤的侵袭性进行综合评价,结果显示,在综合分级中,Ⅰ与Ⅱ级的复发率有显著性差异,而病理和X线分级则无显著性差异。提示综合分级对评估骨巨细胞瘤的侵袭性具有合理性和全面性,有助于指导治疗。 相似文献
103.
I. V. Avdeev V. I. Seledtsov I. V. Prokopenko G. V. Seledtsova V. A. Kozlov 《Bulletin of experimental biology and medicine》1995,120(2):826-828
After separation of normal murine bone marrow cells in a Percoll density gradient cellular fractions with densities of 1.076
and 1.060 g/ml are capable of suppressing thein vitro growth of leukemia cells. The cytostatic activity of these fractions, however, does not surpass the level of antitumor antiproliferative
activity intrinsic to intact bone marrow cells. These cells were found to be capable of joining the splenocytes, thymocytes,
and lymph node cells in effector cytostatic cooperation and thus enhance the final antitumor effect.
Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 120, N
o
8, pp. 181–183, August, 1995 相似文献
104.
A. Rashid Choudhury Mohamed S. Al Amin Kamal A. Chaudhri Khalaf R. Al Moutaery 《Child's nervous system》1995,11(2):115-117
A 5-year-old girl presented with a 1-year history of a subcutaneous swelling in the right parietal region. There were no cerebral symptoms or signs. Plain X-ray of the skull showed a lytic bony lesion with sclerotic margin. Computed tomography showed a hypodense, osteolytic lesion with thinned and bulged inner and outer skull tables with intact continuity. There was no intracranial lesion. At operation, the mass was found to be pink and granular, and was totally enucleated. Histology revealed it to be a benign osteoblastoma. 相似文献
105.
Summary
High-resolution computed tomography (HRCT) provides excellent contrast between osseous structures, air and soft tissue in
conjunction with high spatial resolution. Therefore, thin-section HRCT with bone window setting is the method of choice for
the examination of the middle ear structures. The indications are acute and chronic inflammatory changes, cholesteatoma and
tumor, the “postoperative middle ear”, and malformations. In most cases, HRCT enables differentiation between inflammatory
changes, cholesteatoma, and tumor. The excellent depiction of subtle osseous details enables the identification of erosions
of the ossicles or of the bony walls of the mastoid cells, of osseous defects of the tegmen, of the bony labyrinth, and of
the tympanic course of the facial canal. In addition, HRCT enables excellent depiction of reconstructions of the ossicles
or prosthesis of the ossicles. Although HRCT is the first method of choice, magnetic resonance imaging (MRI) may provide additional
information and lead to a more accurate diagnosis in some cases. This is explained by the excellent soft tissue contrast provided
by MRI. In addition, MRI offers the possibility of using various pulse sequences and the administration of IV contrast material.
Therefore, MRI may allow the differentiation between inflammatory changes, cholesteatoma, and tumor in those cases in which
accurate diagnosis cannot be made by HRCT. The differentiation between a meningocele or meningoencephalocele and other entities
such as tumors or cholesteatoma can be established by MRI. Furthermore, MRI can accurately depict cases of labyrinthitis or
of neuritis of the facial nerve or of intracranial disease caused by middle ear processes, while this is not always possible
by HRCT.
In summary, HRCT of the middle ear is the method of choice, but MRI may provide supplementary information in those cases in
which accurate diagnosis cannot be established by HRCT.
相似文献
106.
Masaki Hata Akinori Nango Hisateru Niki Yoshifumi Hayafune Atsushi Kato 《Journal of orthopaedic science》1997,2(1):3-9
To elucidate the growth of the tarsal bones in congenital clubfoot, relative to the growth of these bones in the unaffected feet and compared to growth in the feet of normal volunteers, we used a computed tomography (CT) scanner to measure the volume of all tarsal bones. The subjects of the study were 10 adults (7 men and 3 women) with unilateral congenital clubfoot (average age 20 years and 1 month). As controls, we examined 11 healthy volunteers. We calculated the ratio of the volume of each tarsal bone to the total bone volume and the ratio of the volume of each tarsal bone in clubfoot to the corresponding bone in the unaffected foot. The volume ratio of each tarsal bone was compared between clubfeet and unaffected feet because the differences of each tarsal bone ratio between the normal foot group and unaffected foot group were not significant. In the clubfeet (n=10), the talus and the medial cuneiform bones were smaller than those in the unaffected feet (n=10) but the cuboid bone was larger. The growth of the navicular did not differ from as that in unaffected feet. Our results suggested hypoplasia on the medial side of the foot in adult patients with congenital clubfoot. The 3 patients who had undergone medial release showed particularly marked hypoplasia of the medial side. In congenital clubfoot cases with severe deformities who had undergone wide soft-tissue release operations, there were clear growth suppressions in the talus and the medial cuneiform. We could not determine whether the cause of the growth suppression was the hypoplastic nature of tarsal bones themselves or the surgical obstacles to tarsal bone growth. 相似文献
107.
本文报告了自1985年 ̄1995年间采用带旋髂深血管蒂髂骨瓣移植与加压螺纹钉内固定治疗青壮年囊内型股骨颈骨折26例。随访时间平均5年5个月。结果,26例骨折痊愈,骨折愈合率为100%。骨折愈合时间平均4个月。仅1例骨折愈后后股骨头发生缺血坏死。股骨头缺血坏死率为4%。 相似文献
108.
带血管蒂舟骨瓣移位术的应用解剖 总被引:3,自引:0,他引:3
目的:为治疗距骨骨折提供新术式的解剖学基础.方法:在30侧灌注红色乳胶的成人下肢标本上,对舟骨背侧面形态、血供来源进行观测.结果:舟骨背侧面动脉主要来自内踝前动脉、跗内侧动脉以及足底内侧动脉浅支,分别发3~5支、1~3支和1~2支外径在0.2~1.0mm之间的骨膜支,形成骨膜动脉网.结论:以内踝前血管为蒂,可切取舟骨背侧2.0cm×1.0cm×0.5cm大小的骨瓣,用于距骨颈骨折修复.术式经临床应用证实,手术简便,效果可靠. 相似文献
109.
Abstract A case of external inflammatory root resorption and labial fenestration in a maxillary central incisor is presented. The root canal was dressed with pure calcium hydroxide mixed with normal saline for 1 month before it was obturated with gutta percha and apicoectomy surgery undertaken to attempt primary closure of the fenestration. The PDL and the fenestration healed uneventfully. 相似文献
110.
将50只家兔造成实验性桡骨骨折,分批取骨痂标本,用光镜和电子显微镜观察表明,在骨折愈合过程中,破骨细胞是骨吸收的主要执行者,巨噬细胞能吞噬死骨,但不能吸收骨质。 相似文献