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目的:将国产自攻型微螺种植支抗钉植于实验动物后即刻加载不同力值,12周后处死实验动物,研究其骨界面的结合及骨组织改建情况,评价自攻型微螺种植支抗钉的即刻负载能力和稳定性,为其临床应用进一步提供实验依据。方法将60枚直径1.6 mm、长度9 mm的微螺种植支抗钉局麻下植入30只兔的下肢胫骨,每只兔子2枚,两枚钉之间交互牵引。30只兔子随机分为3组,分别加力0 g(对照组)、100 g、300 g。12周后处死实验兔,采集切片图片,观察骨组织-钉愈合界面并进行静态骨组织测量。结果(1)加载不同力值的微螺种植钉中,150 g组骨结合率高于对照组和300 g组,300 g组骨结合率小于0 g组,且差异均有统计学意义(P<0.01)。(2)加力组的压力侧结合率略高于张力侧,但150 g组的压力侧与张力侧差异无统计学意义(P>0.05),300 g组压力侧与张力侧两者比较差异有统计学意义(P<0.05)。结论(1)骨结合率均达到70%~80%,即刻加载0~300 g的矫治力没有影响微螺钉种植体的稳定性。(2)力值过大对种植钉的骨结合有一定的影响。(3)对照组与加力组加力值差别大,而骨结合率却差别不大,说明骨结合率与力量关系不大,却与时间关系较大。(4)压力侧骨结合率略高于张力侧。 相似文献
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目的 应用微种植支抗钉结合滑动杆治疗处于轻中度牙列拥挤安氏Ⅱ类亚类患者,探讨矫治前后疗效变化。方法 对35例15~25岁轻中度牙列拥挤安氏Ⅱ类亚类患者采用单侧植入微种植体支抗钉结合滑动杆推磨牙向后,运用直丝弓矫治技术完成矫治。分析测量矫治前后模型及拍摄头颅侧位片评价其治疗有效性。结果 治疗完成后所有患者远中侧磨牙由Ⅱ类关系调整为Ⅰ类关系,模型测量上上颌第一磨牙后移量平均增加5.15mm,牙弓前段、中段宽度平均增加分别为5.45mm、4.55mm,头影测量上上颌第一磨牙至Y轴距离平均减小3.3mm(牙合)平面顺时针旋转约2.72°,上颌磨牙轻度平均压低0.92mm,变化具有统计学意义(P<0.05),矫治效果良好。结论 微种植支抗钉结合滑动杆能够有效远移上颌磨牙,可顺利完成对安氏Ⅱ类亚类轻中度牙列拥挤患者的矫治,疗效满意。 相似文献
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[目的]总结微种植支抗在口腔正畸植入过程中的临床护理。[方法]46例需植入微种植支抗的正畸病人,对植入术前、术中、术后进行专科口腔卫生护理及指导。[结果]种植支抗植入术后无严重并发症,成功率95.83%。[结论]良好的医护配合、严格的无菌操作既能减少术后感染,也是微种植支抗植入成功的重要保证。 相似文献
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目的探讨微型种植支抗的应用特点及优势。方法选择13例上颌须增强支抗的正畸治疗患者,植入微型种植体共28枚,植入术后TN拉簧即刻加载150~200 g力,观察种植体产生的牵引效果和有无临床不适症状。结果所有病例矫治结束时均达到侧貌及咬合关系良好状态。结论正畸治疗中应用种植支抗无须患者配合,其小巧、舒适,并能有效、快速地矫治复杂病例。 相似文献
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目的:探讨国产自攻型微型钛钉种植支抗在拔牙矫治内收前牙治疗中的临床应用。方法:19例诊断为安氏I类和I I类错牙合,上牙弓前突或双牙弓前突患者,矫治设计为拔除双侧第一前磨牙,支抗设计为磨牙强支抗,用微型钛钉植入上颌第一磨牙与第二前磨牙颊侧根尖之间的牙槽间隔,结合直丝弓技术进行滑动法关闭拔牙间隙。以每侧150~200 g力滑动法内收前牙。参考前颅底平面及种植体支抗的位置,比较治疗前、后头颅定位侧位片,测量前牙内收情况和磨牙支抗的变化。结果:19例牙弓突度均有明显改善,切牙切缘内收(6.73±1.83)mm,支抗磨牙平均前移0.8 mm,均达到了强支抗的效果。结论:国产自攻型微型钛钉种植支抗作为稳定的正畸支抗,操作方便,不依赖患者的合作,能有效地控制后牙支抗,使前突的牙弓获得最大程度的内收,扩大了正畸治疗的范围。 相似文献
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[目的]观察D腔正畸种植钉支抗术的治疗效果,总结其护理。[方法]对60例接受种植支抗术病人资料进行回顾性分析,术前做好准备及心理护理,术中严格无菌操作,医生与护士密切配合,并做好心理护理,术后做好并发症、感染、疼痛及口腔护理。[结果]60例病人均正畸种植成功。[结论]D腔正畸种植钉支抗术操作简单,正畸疗效满意且费用低廉,做好术前、术中、术后护理有利于D腔正畸种植钉支抗术的成功。 相似文献
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Backgroud: With the development of microsurgery and clinical applied anatomy, skin flaps and musculocutaneous flaps with vessel pedicles are primary choices in treatment of soft tissue defect. The transfer of skin flaps and muscular skin flaps with vessel pedicles is rather easy and need't special instruments. Because of utilization of adjacent tissue, the outline is good after operation. 相似文献
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背景:刘福祥教授自行设计的新型种植体在较短种植体长度上给出了较大骨接触面积,同时考虑到种植体的抗扭转能力、抗侧向力能力,种植体与骨弹性模啦的匹配及加工和植入、修复的使易度。目的:观察自主设计的新型种植体植入颌骨后种植体骨界面I型胶原的表达变化,探讨新型种植体与牙槽骨的骨结合能力。方法:拔除成年狼犬双侧下颌前磨牙3个月后,于两侧拔牙位点牙槽骨分别植入新型种植体和I圆柱状种植体各2枚。结果与结论:随时间增加两组周围骨组织惭度逐渐升高,新型种植体组劂微结构问出现常艘逐渐升高的影像组织。两组种植体一骨界面均有I型胶原表达,均于术后4周达高峰,且新型种植体组术后2,4周I型胶原平均灰度值均高于圆柱状种植体组(P〈0.05)。表明新型种植体植入颌骨后能够取得牛物性成功,种柿体一骨界面成骨较圆柱状干叶一植体更快,更活跃,骨结合能力更强。 相似文献
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背景:牙齿压低移动更容易造成牙根吸收,以往针对矫正引起牙根吸收的研究或基于X射线片的回顾性临床研究,或因无法精确控制压低力量,结果误差较大。目的:建立应用微型种植体支抗压低犬切牙的实验动物模型,观察牙齿压低移动过程中牙周、牙根骨组织学的变化,以评价该治疗方法的可行性及安全性。方法:将9只犬分为5组:对照组1只,未加力;1周、2周、4周、12周组每组2只,在上颌两侧第二、三切牙牙根之间唇侧的牙槽间隔处植入微型种植体作为支抗,每侧施加100g的牵引力压低上颌两侧第一、二切牙,分别于加力后1,2,4,12周(主动加力4周,撤力后保持8周)时处死动物,将第一、二切牙连同牙龈、牙槽骨完整切取,制作组织学标本,苏木精-伊红染色,观察牙周、牙根的组织学变化。结果与结论:与对照组相比,1周组组织改建主要在根尖部和牙槽嵴顶,牙槽骨及牙骨质可见吸收,牙周膜局部出现玻璃样变性;2周组骨质吸收程度及范围明显扩大,吸收有从根尖部向根中及颈部扩展的现象;4周组骨质吸收仍然活跃,牙周膜玻璃样变性消失;12周组牙槽骨及牙骨质表面显著修复,骨陷窝新骨沉积,牙周膜排列有序。提示应用微型种植体支抗压低牙齿,早期组织变化主要在根尖部和牙槽嵴顶,表现为牙槽骨及牙骨质吸收、牙周膜玻璃样变性。随着压低力的持续,吸收程度及范围扩展。停止加力后,牙根及牙周组织逐渐修复。 相似文献
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背景:牙齿压低移动更容易造成牙根吸收,以往针对矫正引起牙根吸收的研究或基于X射线片的回顾性临床研究,或因无法精确控制压低力量,结果误差较大。目的:建立应用微型种植体支抗压低犬切牙的实验动物模型,观察牙齿压低移动过程中牙周、牙根骨组织学的变化,以评价该治疗方法的可行性及安全性。方法:将9只犬分为5组:对照组1只,未加力;1周、2周、4周、12周组每组2只,在上颌两侧第二、三切牙牙根之间唇侧的牙槽间隔处植入微型种植体作为支抗,每侧施加100g的牵引力压低上颌两侧第一、二切牙,分别于加力后1,2,4,12周(主动加力4周,撤力后保持8周)时处死动物,将第一、二切牙连同牙龈、牙槽骨完整切取,制作组织学标本,苏木精-伊红染色,观察牙周、牙根的组织学变化。结果与结论:与对照组相比,1周组组织改建主要在根尖部和牙槽嵴顶,牙槽骨及牙骨质可见吸收,牙周膜局部出现玻璃样变性;2周组骨质吸收程度及范围明显扩大,吸收有从根尖部向根中及颈部扩展的现象;4周组骨质吸收仍然活跃,牙周膜玻璃样变性消失;12周组牙槽骨及牙骨质表面显著修复,骨陷窝新骨沉积,牙周膜排列有序。提示应用微型种植体支抗压低牙齿,早期组织变化主要在根尖部和牙槽嵴顶,表现... 相似文献
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Jon W. Schrock Sara Laskey Rita K. Cydulka 《International journal of emergency medicine》2008,1(2):85-90
Background
Skin and soft tissue infections are a common admission diagnosis to emergency department (ED) observation units (OU). Little is known about which patients fail OU treatment.Aims
This study evaluates clinical factors of skin or soft tissue infections associated with further inpatient treatment after OU treatment failure.Methods
A structured retrospective cohort study of consecutive adults treated for abscess or cellulitis in our OU from April 2005 to February 2006 was performed. Records were identified using ICD-9 codes and were abstracted by two trained abstractors using a structured data collection form. Significant variables on univariate analysis P?0.1 were entered into a multivariate logistic regression.Results
A total of 183 patient charts were reviewed. Four patients with a non-infectious diagnosis were excluded, leaving 179 patients. The median age was 41 (interquartile range: 20–74). Following observation treatment, 38% of patients required admission. The following variables were evaluated for association with failure to discharge home: intravenous drug use, gender, a positive community-acquired methicillin-resistant Staphylococcus aureus culture, age, presence of medical insurance, drainage of an abscess in the ED, diabetes and a white blood cell count (WBC) greater than 15,000. Following multivariate analysis only female gender odds ratio (OR) 2.33 [95% confidence interval (CI): 1.06–5.15] and WBC greater than 15,000 OR 4.06 (95% CI: 1.53–10.74) were significantly associated with failure to discharge.Conclusions
Among OU patients treated for skin and soft tissue infections, women were twice as likely to require hospitalization and patients with a WBC?>?15,000 on presentation to the ED, regardless of gender, were 4 times more likely to require hospitalization. 相似文献17.
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颈椎体骨赘的组织学研究 总被引:2,自引:0,他引:2
孟庆兰 《中国康复理论与实践》2005,11(5):354-354,i002
目的 观察颈椎体骨赘的组织结构。方法 在有颈椎骨质增生的尸体标本上。取7例增生的颈椎体骨赘进行组织学研究。结果和结论 骨赘经历了软骨化期、初钙化期、钙化期、初骨化期和骨化期。 相似文献
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Objectives1) To measure frequency and yield of blood cultures obtained for observation status adult patients with skin and soft tissue infection (SSTI), 2) describe how often blood cultures were performed according to Infectious Diseases Society of America (IDSA) SSTI guideline indications, 3) identify proportion of patients meeting Center for Medicare Services (CMS) sepsis criteria.DesignRetrospective cohort.SettingTertiary academic center.PatientsConsecutive adult observation status patients hospitalized with SSTI between July 2017 and July 2018.MethodsWe measured the proportion and results of blood cultures obtained among the study cohort and proportion of obtained cultures that satisfied IDSA indications.ResultsWe identified 132 observation status patients with SSTI during the study period; 67 (50.8%) had blood cultures drawn. Only 14 (10.6%) patients met IDSA indications for culture; 51 (38.%) met Center for Medicare Services definition for sepsis. We identified two (3.0%) cases of bacteremia and two (3.0%) cases of skin bacteria contamination. In multivariable analysis, only temperature > 38 °C (OR 3.84, 95%CI 1.09–13.60) and white race (OR 2.71, 95%CI 1.21–6.20) were associated with blood culture obtainment; neither meeting IDSA SSTI guideline indications nor meeting CMS sepsis criteria was associated with culture.ConclusionsAmong observation status patients with SSTI, over half had blood cultures drawn, though 10% satisfied guideline indications for culture. The proportion of cultures with bacterial growth was low and yielded as many skin contaminants as cases of bacteremia. Our study highlights the need for further quality improvement efforts to reduce unnecessary blood cultures in routine SSTI cases. 相似文献