透明质酸凝胶联合Nd:YAG激光对老年牙周炎患者牙根敏感的实验研究及临床疗效观察

目的:观察和评价透明质酸凝胶联合Nd:YAG激光对老年患者牙周基础治疗后牙根敏感并发症的疗效.方法:收集老年患者因慢性牙周炎拔除的完整无龋前磨牙24颗,随机分为4组,制备成牙根敏感标本分别用生理盐水、透明质酸凝胶、Nd:YAG激光、透明质酸凝胶联合Nd:YAG激光处理,扫描电镜下观察各样本牙本质小管封闭情况.临床观察60例牙周基础治疗后出现牙根敏感并发症的老年患者,随机分为3组,分别为透明质酸凝胶组(20例,66颗患牙)、Nd:YAG激光组(20例,81颗患牙)、联合组(20例,102颗患牙).透明质酸凝胶组采用单独透明质酸凝胶涂擦敏感牙根,Nd:YAG激光组采用单独Nd:YAG激光照射敏感牙根,联合组先用透明质酸凝胶涂擦敏感牙根,再联合Nd:YAG激光照射.采用Schiff冷空气敏感指数评价,比较3组治疗的有效率.结果:扫描电镜结果显示透明质酸凝胶、Nd:YAG激光照射、透明质酸凝胶联合Nd:YAG激光照射均可封闭牙本质小管,透明质酸凝胶联合Nd:YAG激光效果最佳.临床观察结果显示透明质酸凝胶组、Nd:YAG激光组、联合组治疗有效率分别为69.70％、83.95％、93.13％.联合组治疗有效率显著优于透明质酸凝胶组及Nd:YAG激光组,结果具有统计学意义(P<0.05).结论:透明质酸凝胶联合Nd:YAG激光对老年患者牙周基础治疗后牙根敏感并发症具有较好的临床效果.     

脉冲Nd:YAG激光治疗牙本质过敏症的疗效观察

目的 利用脉冲式Nd:YAG激光治疗牙本质过敏症，对其疗效进行观察。方法 选择临床上He面磨耗、磨损、楔状缺损、牙周治疗后牙根暴露，以及外伤后牙本质暴露，临床诊断以牙本质过敏症的患牙。50例病人的140颗患牙为实验组，以脉冲Nd:YAG激光照射；35例病人的38颗患牙作为对照组，在75％氟化钠甘油涂擦。结果 实验组治疗140颗牙，第1次激光照射后，立即进行检查，治愈126颗，好转6,效8颗，有效率94.29%。将第1次照射好转和无效的患牙行第2次照射，治愈8颗，好转6颗，无效0颗，2次激光照射后有效率为100％。对照组治疗38颗患牙，1次涂药有效率为44.7%，3次涂药有效率为76.3%。结论 两种治疗方法之间有显著性差异（P＜0.05），表明用激光治疗牙本质过敏症的疗效优于氟化钠甘油。     

脉冲Nd:YAG激光联合锶强化生物活性玻璃对牙本质过敏症的疗效评价

目的观察脉冲Nd:YAG激光联合锶强化生物活性玻璃治疗牙本质过敏症的临床效果。方法将89例患者156颗患牙随机分为3组,试验组(52颗):患牙涂锶强化生物活性玻璃并加用Nd:YAG激光照射;对照A组(49颗):仅用脉冲Nd:YAG激光照射;对照B组(55颗):仅涂抹锶强化生物活性玻璃。对比3组在治疗后即刻、1个月及3个月的疗效差异。结果3组患牙治疗后即刻疗效比较差异无显著性(P>0.05);随访1、3个月试验组总有效率优于对照A、对照B组,差异均有统计学意义(P<0.05,P<0.01),同时1个月及3个月时对照A组的有效率优于单纯生物凝胶组(P<0.05)。VAS疼痛值检测显示出不同时段试验组较两对照组治疗效果差异明显(P<0.05)。结论脉冲Nd:YAG激光联合锶强化生物活性玻璃治疗牙本质过敏症比单一的治疗方法具有更佳的临床效果。     

Nd:YAG激光治疗磨牙敏感症疗效观察

目的　观察评价脉冲Nd :YAG激光照射治疗磨牙敏感症的临床效果。方法　选择磨牙牙合面磨损致敏感的患者 42例 ,1 1 3例颗牙 ,随机分为实验组 (激光治疗组 )和对照组 (75%氟化钠甘油糊剂治疗组 )进行治疗并作疗效对比。结果　脉冲Nd :YAG激光照射治疗牙齿敏感症首次治疗、重复治疗的即刻有效率及 3个月的有效率均优于对照组。两组相差显著 (P <0 .0 0 5)。结论　脉冲Nd :YAG激光治疗磨牙牙合面牙本质敏感效果良好。     

奥敏清牙齿脱敏剂联合Er:YAG激光治疗青少年牙本质敏感症的临床观察及实验研究

目的:对奥敏清牙齿脱敏剂联合Er:YAG激光治疗青少年牙本质敏感症的疗效进行研究。方法:78例(共163颗患牙)青少年牙本质敏感症患者随机分为奥敏清组(n=54)、激光组(n=55)和联合组(n=54),奥敏清组患者给予单一奥敏清牙齿脱敏剂涂布治疗,激光组患者给予单一的Er:YAG激光照射治疗,联合组患者在Er:YAG激光照射后再涂布奥敏清牙齿脱敏剂治疗,比较治疗前、治疗即刻和治疗后1周、1月、3月、6月VAS值、总有效率。另将20颗新鲜离体牙随机分为4组,分别用生理盐水、奥敏清牙齿脱敏剂、Er:YAG激光及奥敏清联合Er:YAG激光处理,扫描电镜观察各模型样本形态。 结果:联合组在治疗即刻及治疗后各时间点的VAS值均显著低于奥敏清组和激光组(P<0.05);总有效率均显著高于奥敏清组和激光组(P<0.05);奥敏清组和激光组在治疗即刻、治疗后1周、1月、3月时的总有效率差异无统计学意义,但激光组在治疗后6月的总有效率却显著高于奥敏清组(P<0.05)。扫描电镜结果显示奥敏清、Er:YAG激光及奥敏清联合Er :YAG激光处理均可封闭牙本质小管,且奥敏清联合Er:YAG激光的封闭效果最佳。结论:奥敏清牙齿脱敏剂联合Er:YAG激光治疗青少年牙本质敏感症具有较好的临床效果。     

脉冲Nd：YAG激光联合3M粘接剂对牙本质小管封闭作用的体外研究

目的：探讨脉冲Nd：YAG激光与3M粘接剂联合应用对牙本质小管封闭作用。方法：扫描电镜下观察脉冲Nd：YAG激光照射及脉冲Nd：YAG激光与3M粘接剂联合应用后,牙本质小管的形态学变化。结果：激光组牙本质表面小管口部分熔融封闭,联合应用组牙本质表面熔融,有白色均质样物质附着,部分牙本质小管口的形态模糊不清;纵断面激光组牙本质小管内呈现不规则的熔融改变,深度不深;联合组牙本质小管内可见明显树脂突,且深度较长。结论：激光与3M粘接剂联合应用具有良好的牙本质小管封闭作用。     

根管治疗中应用Nd:YAG 激光的扫描电镜观察

目的 探讨Nd：YAG激光在根管治疗中的应用。方法 选用28个离体单根牙，随机分为4组。对照组不做处理。常规组进行根管扩大和根管冲洗，激光组经根管扩大后，用Nd：YAG激光1．5W，20pps分别照射15s和30s，并用扫描电镜观察。结果 激光照射15s组玷污层被去除，牙本质小管封闭和半封闭。激光照射30s组牙本质过分熔融，牙本质小管口开放。结论 Nd：YAG激光在根管治疗中的应用是可行的。     

脉冲Nd:YAG激光促进氟保护漆治疗牙齿敏感症临床观察

目的　观察脉冲Nd :YAG激光促进氟保护漆治疗牙齿敏感症的临床疗效。方法　用计算机程序控制脉冲Nd :YAG激光照射经涂一层氟保护漆的牙齿敏感症患牙 ,并分别与单纯涂一层氟保护漆或单纯脉冲Nd :YAG激光照射的疗效相比较。结果　涂氟保护漆加脉冲Nd :YAG激光照射治疗牙齿敏感症优于单纯涂保护漆或单纯脉冲Nd :YAG激光照射 ,疗效有显著性差异 (P <0 .0 5 )。结论　涂氟保护漆和脉冲Nd :YAG激光照射的联合应用是一种治疗牙齿敏感症较为有效的手段     

Nd:YAG激光照射联合窝沟封闭治疗儿童早期面龋

目的观察Nd:YAG激光照射联合窝沟封闭治疗儿童早期牙合面龋的临床效果。方法用脉冲Nd:YAG激光照射龋损区,然后用光敏窝沟封闭剂封闭,定期复查。结果治疗组93颗牙,成功70颗,有效17颗,失败6颗,其疗效明显优于对照组。结论Nd:YAG激光照射后光敏窝沟封闭剂封闭是治疗儿童早期牙合面龋安全有效的方法。     

Nd: YAG激光对3种树脂水门汀与牙本质粘接强度的影响

目的观察Nd: YAG激光照射前后树脂水门汀-牙本质粘接界面的微观形貌特征,评价Nd: YAG激光对3种树脂水门汀与牙本质间粘接强度的影响。方法选择人离体前磨牙30颗,分为颊、舌两部分,将试件随机分为激光组和对照组。激光组以0.8 W、10 Hz脉冲Nd: YAG激光作用于牙本质表面25 s,联合3种树脂水门汀RelyX ARC、Panavia F和RelyX Unicem充填;对照组直接使用树脂水门汀充填。然后测试剪切强度,在根管显微镜下观察断裂模式并分类。另选人离体前磨牙6颗,按照标准的牙本质粘接面预备后,使用Nd: YAG激光照射3颗牙牙本质表面,并联合充填不同的树脂水门汀,用扫描电镜观察Nd: YAG激光照射前后树脂水门汀-牙本质界面的微观形貌变化。结果
激光照射可以提高自酸蚀树脂水门汀Panavia F和自粘接树脂水门汀RelyX Unicem与牙本质之间的剪切强度（P＜0.05）。激光会降低全酸蚀树脂水门汀RelyX ARC与牙本质间的剪切强度（P＜0.05）。根管显微镜下观察可见：试件断裂大部分发生在树脂水门汀-牙本质界面。扫描电镜观察可见：Nd: YAG激光照射后,全酸蚀亚组和自酸蚀亚组的混合层变薄、树脂突变短且少;自粘接亚组变化不明显,未见树脂突。结论Nd: YAG激光照射后,可提高Panavia F和RelyX Unicem与牙本质的剪切强度,建议临床联合应用。     

Evaluation of relapse with thermoplastic retainers equipped with microsensors

ObjectivesTo examine relapse with thermoplastic retainers equipped with microsensors 1 year after treatment.Materials and MethodsA total of 42 patients (29 females, 13 males) treated with four premolar extractions were included in this study. Thermoplastic appliances equipped with TheraMon microsensors (Handelsagentur Gschladt, Hargelsberg, Austria) were used to assess daily wear time (DWT), and the patients were monitored at 2-month intervals for a period of 12 months. At the end of the follow-up, the following two groups were formed based on the mean DWT: short wear time (SWT; <9 h/d) and long wear time (LWT; ≥9 h/d). Digital models were constructed before treatment (T0), at debonding (T1), and 6 months (T2) and 12 months (T3) after debonding. Little''s Irregularity Index (LII) and the intercanine and intermolar widths, arch lengths, overjet, and overbite were calculated based on the digital models. Data were analyzed statistically.ResultsIrregularity and overjet increased, whereas transverse measurements and arch lengths decreased with time in both groups. During the retention period, overbite decreased in the SWT group but increased in the LWT group. There were significant differences between groups only in mandibular irregularity. The LII values of the SWT group were significantly higher than those of the LWT group for the T1–T2 and T1–T3 time intervals (P < .05).ConclusionsA mean DWT less than 9 hours/day was inadequate for controlling irregularity within clinically acceptable limits. A wear time of at least 9 h/d is recommended for the maintenance of mandibular anterior alignment.     

Genetic counseling of parents with children with clefts]

The elucidation of the aetiology of the individual case has proved to be of fundamental importance to the counselling interview as well as to the assessment of the risk for further affected children. Up to now, a genetic cause in the form of chromosomal or gene mutations can be assumed only if the cleft is related to a distinct syndrome. An isolated cleft obviously owes its origin to a combination of genetic and extrinsic factors. Consequently, the assessment of the risk of repetition is to a great extent based on empirical values.     

中草药治疗三叉神经痛疗效观察

三叉神经痛是口腔科的常见疾病之一 ,其发病原因至今尚未完全明了。我们自 1995年开始用中草药方剂治疗原发性三叉神经痛患者 50例 ,经临床随访观察取得比较满意的效果 ,现报告如下。1　材料与方法1.1　病例资料本组病例共 50例 ,男性 15例 ,女性 35例。年龄最大者 82岁 ,平均年龄 57岁。疼痛分布区 ,发生在三叉神经第Ⅰ支者 4例 ,第Ⅱ支者 10例 ,第Ⅲ支者 18例 ,三支同时受累者 18例。病变部位在右侧者 2 8例 ,左侧者 2 2例。疼痛性质均为短暂的刀割样及撕裂样疼痛。疼痛持续时间在 3ｍｉｎ以内者 3例 ,超过 3ｍｉｎ者 12例 ,最长时间达 10…     

Management of a patient suffering with Cherubism with dental implants

Cherubism is a rare non-neoplastic, fibro-osseous hereditary disorder characterized by bilateral expansion of the maxilla and mandible producing a characteristic facial appearance. It can affect the facial and dental growth of the individual and often results in gross aesthetic and functional deficiencies. The teeth may also be displaced or submerged and these problems can often compromise successful restorative rehabilitation. This paper describes the restorative management of an adult patient with Cherubism involving a fixed implant retained mandibular restoration. The care utilized 3D planning software and implant insertion guides to facilitate an early loading protocol and the use of optimum bone quality/volume areas.