再植牙牙髓处理的临床探讨

目的：探讨脱位睡再植的牙髓处理时间和方法。方法：临床观察再植牙65颗，分析牙髓血管再生的影响因素及不同牙髓处理的远期疗效。结果：获牙髓血管再生成功率43.24%，且与牙根发育状况及脱位时间有关，获牙髓血管再生的牙、出现牙髓症状后再行根管充填及再植后7－14天即行根管充填的牙再植成功率分别为100％，76.195,89.28%。结论：除年轻恒牙外脱位牙一般再植后7－14天得根管充填，根管永久性填前先选用氢氧化钙糊剂进行暂时性充填。     

牙周——牙髓联合病变治疗评定

目的:探讨牙周——牙髓联合病变的有效治疗方法,对不同的治疗方法加以评定。方法:对82例牙周——牙髓联合病变患者(共92颗患牙)根据不同病情采用了不同的治疗方法。结果:23颗原发性牙髓病、根尖病继发牙周病患牙,有11颗治愈,9颗好转,有效率为86.9%;48颗原发性牙周病病变继发牙髓病变患牙,有27颗治愈,10颗好转,有效率为77.1%;21颗牙髓、牙周同时病变患牙,有8颗治愈,7颗好转,有效率为71.4%;总有效率达到78.3%。结论:牙髓、牙周系统的治疗和患者的良好配合,可取得良好的临床疗效。     

老年人牙隐裂综合治疗临床分析

目的探讨老年人牙隐裂综合治疗的临床效果及其影响因素。方法根据临床表现及检查,78颗牙隐裂分为早期牙隐裂26颗和晚期牙隐裂52颗,进行综合治疗,治疗后追踪观察2年,分析疗效。结果综合治疗牙隐裂成功率达92％。结论综合治疗是老年人牙隐裂较理想的治疗方法。     

牙源性角化囊肿的临床分析

目的 研究牙源性角化囊肿的诊断特点和治疗方法。方法 对78例牙源性角化囊肿的临床症状，x线及手术方法进行回顾性研究。结果 78例患经过2～5年随访，复发率为11．54％，手术加冷冻的治疗效果最佳。结论 通过临床和x线特征可正确诊断和治疗牙源性角化囊肿。     

折裂牙的粘接治疗方法

用Super-bond (C&B)粘接剂粘接折裂磨牙,以保存患牙.介绍了治疗方法及治疗结果,20 例磨牙治疗一年复诊均恢复了正常咀嚼功能,牙龈无红肿,所以用Super-bond(C&B)粘接剂粘接折裂磨牙,恢复患牙功能而保存了患牙.     

40例年轻恒前牙外伤后治疗的临床观察

<正> 处于生长发育阶段的年轻恒前牙受外伤撞击后易导致牙体缺损,牙髓组织损伤及牙齿脱位等,笔者通过对临床40例不同程度外伤的年轻恒前牙进行各种治疗并经3年以上的观察,现将结果报告如下:     

一次性治疗隐裂牙的临床体会

目的探讨一次性治疗隐裂牙的临床疗效。方法 48例51颗隐裂牙采取一次性全冠预备,分别进行临时冠粘接,有牙髓和根尖病变的隐裂牙再进行一次性根管治疗,然后对所有隐裂牙进行全冠修复的综合治疗。结果经一次性治疗的隐裂牙随访2年总有效率为90.19%。结论对隐裂牙一次性治疗,特别是临时冠的粘接取得了很好的疗效,更好地保存了患牙。     

MTA在临床直接盖髓治疗中的应用

为了评价在直接盖髓治疗中应用MTA（mineral trioxide aggregate）的临床治疗效果。我们采用直接盖髓术对7．32岁患者的36颗非龋源性意外露髓的患牙分成2组进行保存活髓治疗,实验组将MTA作为盖髓剂,对照组以光固化氢氧化钙糊剂作为盖髓剂,24个月后对患牙的临床症状、牙髓活力、牙本质桥形成及露髓孔关闭情况进行评价。结果显示,实验组成功率为94．44％,对照组成功率83．33％。MTA是一种理想的直接盖髓剂。     

PiNLOCK自攻自断螺纹钉修复大面积牙体缺损的疗效观察

目的 :观察PiNLOCK自攻自断螺纹钉用于修复大面积牙体缺损的临床疗效。方法 :选择 4 1例 4 5颗牙体组织大面积缺损的患牙 ,于牙本质内植入PiNLOCK自攻自断螺纹钉 ,外周再做充填体或修复体 ,术后每隔 6个月复查 ,平均观察期为 3年。结果 :成功 4 3牙 ,失败 2牙 ,失访 2牙 ,成功率为 91.11%。结论 :PiNLOCK自攻自断螺纹钉用于修复牙体大面积缺损固位 ,效果良好 ,临床上需严格掌握适应症和操作规程。     

楔状缺损治疗失败的原因分析

[目的]通过远期疗效的观察,分析楔状缺损治疗失败的原因.[方法]79例518颗楔状缺损牙分别用光固化复合树脂和进口玻璃离子修复,于修复后1、2年及4年根据一定指标评价其疗效.[结果]楔状缺损修复后的临床成功率从2年时的85.3%,下降为4年时的27.6%,并发现1.7%(修复后2年)和6.6%(修复后4年)的患牙原楔状缺损修复体颈缘下方出现的新"楔状缺损".疗效受多种因素影响,有咬合因素患牙组的临床失败率明显高于无咬合因素组.[结论]楔状缺损修复治疗失败率受患牙承担咬合力的大小和修复材料物理性能的影响,提示在楔状缺损的治疗中,一定要考虑咬合因素的祛除.     

年轻恒牙活髓切断术疗效观察

目的对年轻恒牙施活髓切断术观察其疗效。方法对113颗深龋露髓及创伤露髓并发牙髓炎的年轻恒牙进行活髓切断术治疗。结果62颗盖髓有效，成功率54．87％；51颗盖髓无效(无效为无变化及失败)其中无变化38．05％，失败7．08％。结论活髓切断术是治疗深龋露髓及创伤露髓并发牙髓炎的较好方法。     

乳牙2%戊二醛活髓切断术疗效观察

目的寻求一种能够有效地保存乳牙生活根髓,提高活髓切断术成功率的方法．方法：选择102只患牙用2％戊二醛固定根髓断面后用含戊二难之盖髓剂盖髓,然后充填并观察半年至1年疗效,结果术后半年成功率为97．1％,术后1年成功率为95．7％,结论2％戊二醛法活髓切断术可大量替代神剂失活干尸术．具有操作安全,疗程缩短为一次等优点。     

玻璃离子粘固剂联合树脂治疗后牙深龋疗效观察

探讨并记录护髓垫底材料玻璃离子粘固剂与自凝氢氧化钙联合磷酸锌水门汀治疗后牙深龋的疗效并进行比较。对照组以自凝氢氧化钙衬洞及磷酸锌水门汀垫底后与光固化复合树脂联合修复后牙牙体缺损。随访观察,并进行疗效比较。深龋经玻璃离子粘固剂垫底后,能明显减轻复合树脂对牙髓的刺激作用,从而护髓效果更佳。     

光固化复合树脂充填的并发症附54例101颗牙的临床分析

光固化复合树脂已普遍应用于前牙Ⅲ Ⅳ Ⅴ类洞的充填,以及四环素牙、班釉牙、釉质发育不全等的贴面修复,但临床上由此引起的牙髓、牙周组织的并发症也较普遍,本人自89～94年收治了54例101颗牙由光固化治疗后引起不同种类的并发症,对发生的原因进行分析,以消除并发症的发生。     

Three-Dimensional Tooth Models with Pulp Cavity Enhance Dental Anatomy Education

Dental anatomy is an integrated, core fundamental dental course, which prepares students for all future clinical dental courses. This study aimed to build up an online dental learning platform of micro-computed tomography-based three-dimensional (3D) tooth models with pulp cavity, and to further evaluate its effectiveness for dental anatomy education using a cohort study. First, ninety-six extracted permanent teeth were scanned by micro-computed tomography and the enamel, dentine, and pulp cavity of each was distinguished by different grey-scale intensities using Mimics software. Three-dimensional images allowed further discrimination and insights into permanent three-rooted premolars, central tip, and dental diseases including deep caries and wedge-shaped defects. Furthermore, a second mesiobuccal canal (MB2) in maxillary permanent molar teeth and Vertucci type III root canal configuration in mandibular anterior teeth could be detected using the 3D analytical tool. A digitized 3D tooth model learning platform was implemented. Last, two groups of dental students were assessed to evaluate the effect of 3D models on dental anatomy education. Participants in the Digital group were allowed to use the online dental learning platform freely after class, while the participants in the Traditional group were not. Assessment quizzes showed that participants' scores improved in the Digital group with the use of the learning platform compared with scores in the Traditional group. A questionnaire survey indicated that the participants had a positive attitude toward the 3D models. Thus, adding digital 3D resources to a traditional curriculum may have a positive effect on academic achievements.     

根管螺纹钉与光固化复合树脂修复前牙牙冠折断

前牙外伤折断、牙髓暴露,或近中和远中深龋因咬硬物而折断者,较为常见,采用根管螺纹钉做固位装置,用光固化复合树脂修复牙冠,修复体不但固位牢,而且形态逼真,色泽自然,操作简便,深受患者欢迎。作者自1994年6月至1996年12月收治了34人,45颗牙。临床效果满意。     

儿童牙科中氢氧化钙的应用

CH作为盖髓剂、活髓切断剂、年轻恒牙根管充填剂，其治疗机理已被深入研究，其疗效也得到肯定。近年来，CH作为根管内消毒药物，日益受到关注。CH在儿童牙科根尖诱导成形术、活髓切断术、盖髓术中取得了成功，具有可靠的临床应用价值。     

Effects of orthodontic load on the periodontium of autogenously transplanted teeth in beagle dogs

Objective:To observe the periodontal healing of autogenously transplanted teeth loaded orthodontically after autotransplantation in Beagle dogs.Methods:Forty-eight teeth were autogenously transplanted,24 of which were loaded postoperatively with orthodontic force at different time points and for different durations.Periodontal healing was evaluated by probing pocket depth(PPD),the expression of relevant proteins,and histomorphometric analyses.Results:The dental pockets of loaded and non-loaded teeth were both much deeper after the first postoperative week than before transplantation(P<0.05).Later,the PPD,which was measured after postoperative weeks 1,3,5,9 and 13,gradually became shallow.The expressions of alkaline phosphatase(ALP)and basic fibroblast growth factor(bFGF)were higher in loaded teeth than in non-loaded teeth(P<0.05),and in groups subjected to two weeks duration of loading than in other groups at the same load time point(P<0.05).For the same load duration,the expressions of ALP and bFGF in teeth loaded after postoperative week 4 were higher than those of other treatments(P<0.05).According to histomorphometric analyses,an orthodontic force on transplanted teeth applied after postoperative weeks 4 or 8 for two weeks duration should be favorable for periodontal healing.Conclusions:It is advisable to apply an appropriate magnitude of force on autotransplanted teeth,such as orthodontic force,at appropriate time points and for a suitable duration,to achieve the optimal clinical prognosis following autogenous tooth transplantation.These results may serve as a basis for subsequent studies in humans so as to make clinical improvements.     

平菇果蔬复合即食片的研制

以平菇为主要原料,配以山楂、胡萝卜等辅料,将其加工成酸甜可口、营养丰富、食用方便的片状凝胶食品.工艺流程为：平菇经切片、预煮、打浆后,与山楂浆、胡萝卜浆按一定比例混合,添加适量辅料后,经熬煮、摊片、干燥、揭片、切片、包装等工序即得成品.通过单因素试验,采用感官评定方法,确定了最佳配料组成：平菇浆100 g,山楂浆50 g,胡萝卜浆30 g,蔗糖20 g,淀粉3 g,卡拉胶0.2 g.研究为平菇和山楂的精深加工提供了有效途径.     

纸浆接枝改性制备高吸水性树脂的研究

采用纸浆纤维素为分子骨架，接枝丙烯酸及丙烯酰胺制备高吸水树脂。对单体用量、引发剂用量、中和度、反应温度等工艺条件进行了优化研究。利用IR图表征了产物的结构。