Accuracy and dimensional stability of extended-pour and conventional alginate impression materials

BackgroundThe authors conducted a study to determine if two irreversible hydrocolloid impression materials (Cavex ColorChange, Cavex Holland BV, Haarlem, Netherlands; Jeltrate Plus Antimicrobial Dustless Alginate Impression Material, Dentsply Caulk, Milford, Del.) stored for five days were dimensionally accurate.MethodsThe authors modified Ivorine teeth (Columbia Dentoform, Long Island City, N.Y.) on a Dentoform model (1560 series model, Columbia Dentoform) to allow measurements of tooth and arch width. They made impressions and generated casts immediately and at five additional times. They recorded tooth and arch widths on the casts and compared the measurements with those for the standard model.ResultsCompared with measurements for the model, the greatest measured difference in casts was 0.003 inches for Cavex ColorChange (extended-pour alginate) and 0.005 inches for Jeltrate Plus Antimicrobial Dustless Alginate Impression Material (conventional alginate). The percentage of dimensional change ranged from ?0.496 to 0.161 percent for the extended-pour alginate and from ?0.174 to 0.912 percent for the conventional alginate.ConclusionsResults of analysis of variance and paired t tests indicated that when generated immediately and at day 5, casts produced from both impression materials were not statistically different from the standard model (P < .05).Clinical ImplicationsWhen stored properly, both alginate materials can produce accurate impressions at day 5 for diagnostic casts and for fabrication of acrylic appliances.     

托盘粘接剂对藻酸盐印模材料与三种不同材料托盘间粘接强度的影响

目的研究托盘粘接剂对藻酸盐印模材料与不同材料托盘间粘接强度的影响。方法选择自凝树脂、光固化树脂和不锈钢3种托盘材料,每种材料分2组,一组涂布粘接剂,另一组不涂布粘接剂作为对照,总计6组,每组8个试件。采用藻酸盐通用型粘接剂以及临床常用的藻酸盐印模材料,装置在万能测力仪上进行拉力测试,所得数据用SAS软件进行统计分析。结果研究结果显示所有托盘材料中,应用托盘粘接剂组具有更高的粘接强度（P〈0．01）。不同托盘材料对粘接强度的影响具有统计学意义（P〈0．01）。结论在托盘表面应用粘接剂能改善印模材料和托盘的粘接强度,涂布粘接剂前后不锈钢材料托盘的粘接强度均大于树脂。     

Hydrocolloid dressing in pediatric burns may decrease operative intervention rates

Introduction

Partial-thickness scalds are the most common pediatric burn injury, and primary management consists of wound dressings to optimize the environment for reepithelialization. Operative intervention is reserved for burns that fail to heal using conservative methods. Worldwide, paraffin-based gauze (Jelonet) is the most common burn dressing; but literature suggests that it adheres to wounds and requires more frequent dressing change that may traumatize newly epithelialized surfaces. Hydrocolloid dressings (DuoDERM) provide an occlusive moist environment to optimize healing and are associated with less frequent dressing changes.

Aim

The aim of the study was to retrospectively analyze pediatric burns in a single tertiary referral center over a 10-year period comparing the impact of Jelonet and DuoDERM dressings relative to operative intervention rates.

Methods

All pediatric burns admitted between 1997 and 2007 were identified using the Hospital Inpatient Enquiry system. Demographics were collected from hospital records and theater logbooks. Acute, partial-thickness burns in patients younger than 15 years were analyzed according to dressing type applied (Jelonet or DuoDERM).

Results

Two hundred forty-eight pediatric burns were analyzed between 1997 and 2007. One hundred thirty-nine patients were treated with Jelonet dressings, and 109 were treated with DuoDERM. Debridement and grafting were required in 60 (43%) of the Jelonet patients compared with 10 (9%) of the DuoDERM patients (P < .05). The DuoDERM-managed patients maintained a significantly lower graft rate on subanalysis of scalds excluding early grafting within 5 days (P < .001).

Conclusion

Observational evidence suggests that DuoDERM leads to less operative intervention and should be preferentially used in pediatric burns.     

透明贴治疗静脉炎效果观察

为了预防和治疗因静脉输液而致的静脉炎,将59例静脉炎患者随机分为观察组(29例)和对照组(30例)。对照组行常规50%硫酸镁湿热敷处理,观察组用康惠尔透明贴粘贴于患处进行治疗。比较两组显效及痊愈时间,差异有显著性意义(P<0.01)。提示康惠尔透明贴治疗静脉炎比常规湿热敷效果好。     

油纱烟卷换药法在消化道瘘治疗中的应用价值

目的探讨油纱烟卷换药法在消化道瘘治疗中的应用价值。方法总结我院使用油纱烟卷换药法治疗17例复杂消化道瘘的经验,结合文献资料进行评价。结果 17例患者均于瘘后40天内痊愈,恢复经口进食。结论油纱烟卷引流法在充分引流同时通过油纱隔离有效保护创面,减轻了腐蚀及炎症反应,最大限度促进瘘口自愈。     

A Pilot Randomized Controlled Trial of Novel Dressing and Securement Techniques in 101 Pediatric Patients

Purpose

To evaluate feasibility of an efficacy trial comparing peripherally inserted central catheter (PICC) dressing and securement techniques to prevent complications and failure.

果酸和胶原蛋白敷料联合五味消毒饮加减治疗颜面部痤疮的 临床疗效分析

目的 观察五味消毒饮加减配合果酸治疗痤疮的临床疗效及安全性。方法 将 64 例痤疮患者,随机分为治疗组（五 味消毒饮加减配合果酸治疗）和对照组（五味消毒饮加减治疗）。其中治疗组先以 20% 果酸治疗,间隔 2 周 1 次,共 4 次。在每次果酸治疗后胶原蛋白敷料第 1 周每日 1 次,第 2 周隔日 1 次;口服中药每日 2 剂,分 2 次服用,随症状加减, 2 个月为 1 个疗程。结果 治疗组和对照组总有效率分别为 84.38%、53.13%,治疗组明显优于对照组。结论 五味消毒饮 加减配合果酸治疗痤疮,疗效满意度高。     

含钙、镁生物敷料对氢氟酸烧伤后大鼠血钙浓度的影响

目的:应用我们制备的含钙、镁合剂生物敷料,覆盖大鼠氢氟酸烧伤创面,观察血钙浓度变化,探讨其作用效果.找到一种使用方便,经济,安全,能快速阻断氟离子对组织损害、保护间生态组织的方法.方法:以Wistar大鼠为动物模型,设A组为正常对照组;B组为烧伤后不治疗组;C组为烧伤后应用钙剂湿敷组;D组为烧伤后应用含钙、镁生物敷料组.分别于伤后4小时、8小时、24小时、72小时抽血,测定血钙浓度.结果:钙、镁生物敷料组组织损伤较轻,死亡率低,血钙浓度降低较小.而钙剂湿敷组与不治疗组无明显差别.结论:应用钙、镁生物敷料可有效地阻断氟离子的进行性损害,保护间生态组织,减少低血钙的发生.     

自制蜂蜜敷料治疗慢性感染伤口的疗效观察

目的 观察自制蜂蜜敷料治疗慢性感染伤口的疗效.方法 选取2008年1月-2009年6月,在换药室接受伤口治疗的85例慢性感染伤口患者,按基本条件相当的原则分为观察组和对照组;观察组用自制蜂蜜敷料治疗,对照组按常规处理伤口,观察两组伤口感染的治疗效果.结果 治疗7～10 d后伤口分泌物细菌培养,观察组感染伤口治愈率为100.0%,对照组感染伤口治愈率为37.5%;疗效观察:观察组总有效率95.6%,Ⅱ期愈合率88.9%,对照组总有效率70.0%,Ⅱ期愈合率42.5%.结论 蜂蜜不仅具有抗菌性,改善伤口环境,而且无创地 清除伤口坏死组织和伤口污物,因此,蜂蜜敷料治疗慢性感染伤口是一种安全有效的治疗方法 .     

海藻酸钠微球在肝动脉化疗栓塞治疗中晚期原发性肝癌中的疗效研究

目的 比较海藻酸钠(KMG)微球和明胶海绵颗粒在肝动脉化疗栓塞中的栓塞效能、疗效,并探讨栓塞效能和疗效间的关系.方法 接受KMG微球及明胶海绵颗粒栓塞的同质中晚期肝癌患者各50例,分别为实验组和对照组,比较两组患者的栓塞效能(术后1个月瘤灶的碘油沉积率)以及栓塞疗效,并比较栓塞效能与疗效间的关系.结果 术后第一个月的碘油沉积率实验组和对照组分别为(81.32±13.322)%和(50.78±19.723)%;差别有统计学意义.2年肝内肿瘤进展率实验组和对照组分别为48%和68%;差异有统计学意义;无进展生存率实验组和对照组分别为46%和26%,有统计学意义.实验组和对照组1年和2年生存率分别82%,72%和60%,38%;差异有统计学意义.实验组和对照组1、2年肝外肿瘤进展率分别2%,4%和20%,30%,有统计学意义.1年肝内肿瘤进展及1年无进展生存率,两组比较无差别.实验组和对照组1年生存率分别为82.2%和33.3%;差异有统计学意义,而无进展生存率分别为74.0%和30.4%;P=0.009,且1年肝内肿瘤进展率分比为4.1%和29.6%;P<0.001,肝外肿瘤进展率实验组和对照组分别为0.31%vs 35.5%;P<0.001.结论 KMG微球治疗应用于肝动脉化疗栓塞术中治疗原发性肝癌安全,患者耐受良好;作为栓塞剂,较之明胶海绵颗粒,能取得更优的近期以及远期疗效. 肿瘤灶中碘油的沉积率作为栓塞效果的指标,碘油沉积率较高的肝癌患者其预后往往更优于乏碘油沉积的肝癌患者.