24颗磨牙纵折保存治疗的疗效分析

目的 探讨和分析磨牙纵折保存治疗方法。方法 冠外结扎复位固定,降低咬合,根管充填及牙周治疗后,冠内固定,牙体预备,全冠修复。结果 24颗磨牙纵折采用本法修复,经2年随访,成功22颗,失败2颗,成功率91.7％。结论 磨牙纵折经合理的复位固定、根管治疗及牙周治疗后行铸造全冠修复,保存方法可靠。     

107例冠根联合折裂磨牙保存治疗的疗效观察

目的探讨磨牙冠根联合折裂患牙的保存治疗方法。方法 107颗冠根联合折裂后牙采用钢丝固定后,进行完善的根管治疗,哑铃形备洞,光固化树脂粘结充填加全冠修复。结果 107例冠根联合折裂后牙保存治疗后1年后,有62例得以保存,保存率为57.94%,其中有56例为新鲜冠根联合折裂牙齿;其余45例由于反复肿痛则需拔除,失败的病例中陈旧性折裂为39例。结论在新鲜冠根联合折裂后牙可以尝试用钢丝固定,进行完善的根管治疗后全冠修复来保留。     

后牙冠根纵折的治疗体会

后牙冠根纵折要完整保留牙齿是十分困难的，以往处理方法或完整拔除患牙或减根法处理，均未能达到预期效果。笔者通过对冠根联合纵折患牙作根管治疗后再作烤瓷冠完整保留牙齿，达到满意效果。现报告如下。材料和方法１－一般资料：自１９９５年４月～１９９８年１２月共治疗了３２例３２颗磨牙。男１９例，女１３例。左上第一磨牙１１颗，右上第一磨牙９颗，右上第二磨牙１２颗。上、下颌第一、第二磨牙冠根联合全纵折的活髓牙，折裂的两部分冠根完整，牙根无横折。２－治疗方法：首先拍Ｘ线片。把已折裂的牙齿用结扎钢丝捆紧后开髓，拔髓备…     

磨牙纵折保存治疗的临床分析

目的探讨磨牙纵折保存治疗的方法和预防措施。方法41例41颗纵折磨牙栓结扎丝固定、完善根管治疗、光固化树脂粘接充填、烤瓷冠修复。结果随访观察3年,成功38例,失败3例。结论及早固定、完善根管治疗后再作烤瓷冠修复,纵折磨牙可以保留。积极诊治隐裂牙,纠正不良咬合及合理的牙体牙髓病治疗是预防纵裂的关键。     

折裂磨牙保存修复的临床效果观察

目的观察恒磨牙折裂后的保存修复效果。方法38颗折裂磨牙完善根管治疗后钢丝“用”形结扎、固定,3M玻璃离子充填,再以全冠或与邻牙联冠修复,定期随访。结果38颗患牙随访2年,有4颗患牙因松动、疼痛拔除,失败率为10．5％（4／38）。失败的4颗患牙中,2颗患牙随访6个月出现松动、疼痛,X线榆查根分叉阴影明显,均为下颌第二恒磨牙,拔除后见远中为单根管且牙折裂线位于根管口边缘或横跨根管口。1午后2颗第一恒磨牙出现咀嚼痛,其中1颗为上颌第一恒磨牙,X线片示烦侧近中根尖阴影,有折断影像,拔除后证实足近中颊尖根折;另外1颗为下颌第一恒磨牙,X线片示近中根纵裂,分析认为可能足磨牙纵裂时受力过火,虽然纵裂牙颊、舌侧尤明显松动,但根面已有裂纹,全冠修复后仍难以承受[牙合]力而导敛牙根纵裂。结论通过采用完善根管治疗钢丝“同”形结扎、固定,再以全冠或与邻牙联冠修复,可有效地保留成年人磨牙折裂的患牙。     

内固定后全冠修复治疗磨牙纵折的疗效观察

目的探讨内固定后全冠修复在磨牙冠根纵折治疗方面的应用价值。方法对98例纵折磨牙,用钢丝结扎后进行根管治疗及牙体预备,然后进行内固定及流动树脂充填,最后进行全冠修复。对照组102例,采取简单结扎后,直接进行冠修复。观察比较内固定组和对照组的临床疗效。结果内固定组中,成功90例,8例失败拔除,治疗成功率为91.83%。对照组中成功63例,39例失败拔除,治疗成功率为61.76%。两组成功率有显著性差异。结论磨牙纵折后应早期就诊,采用内固定后全冠修复,成功率较高。     

磨牙纵折保存修复治疗的临床体会

目的　探讨磨牙纵折后保存修复治疗的治疗效果。方法　39颗纵折磨牙,结扎丝双股结扎经常规根管治疗,行核桩内固定加全冠修复。结果　经1~4年的随访,成功修复36颗,临床总有效率92.3%。3颗分别因再次根折、患者感觉不适、Ⅲ°松动而导致修复失败。结论　磨牙纵折后经根管治疗结合桩核内固定加全冠修复,可保存患牙,维持正常咀嚼功能。     

双重固定术在纵折牙治疗中的应用

纵折牙，尤其是垂直向纵折牙的治疗在临床上一直颇为棘手。我科从1993年以来，采用牙齿双重固定术对78例纵折牙进行治疗取得了一定的疗效。现总结如下。材料与方法1一般情况本组纵折牙患者共78例，其中男性48例，女性30例。共收集患牙78颗，均为上下颌第一第二磨牙，其中第一磨牙53颗，占68％；第二磨牙25颗，占32％。在78颗牙中隐裂牙57颗，占73％；折裂牙21颗，占27％。临床症状为咀嚼痛，冷热激发痛。诊断为牙髓炎9颗，根尖周炎69颗。2治疗方法与步骤根据徐君伍报道的保留折裂牙方法经过改良后为本文所采用的牙齿双重固定术。具体操作步…     

老年人牙根纵折临床分析

目的:探讨老年人牙根纵折的原因、临床特征及治疗预防措施.方法:对59例老年患者62颗患牙的临床表现结合X线片进行临床研究.结果:老年人牙根纵折好发于下颌第一磨牙,其次是上颌第一磨牙,牙髓治疗后发病率高于未行牙髓治疗的患牙.牙根纵折牙均有明显的咬合创伤及牙槽骨吸收.结论:牙槽骨吸收和咬合创伤是老年人牙根纵折的主要原因.     

纵裂牙裂隙封闭效果的实验观察

目的:观察Cortisomol糊剂封闭纵裂牙折裂缝隙的封闭效果。方法:纳入44颗临床拔除的磨牙,沿根分叉将其纵向劈开。模拟临床用钢丝结扎固定后分为2组,实验组22颗牙用Cortisomol糊剂封闭折裂缝隙,对照组牙的裂缝不做任何封闭处理,1周后向全部牙的髓腔内滴入龙胆紫,暂封剂封闭髓腔。再过1周后拆除所有离体牙结扎钢丝,观察根分叉区着色情况。结果:实验组20颗牙根分叉处未见龙胆紫漏出着色,而对照组只有1颗未见龙胆紫着色(P≈0.000 1)。对照组的渗透率95.45%,实验组为9.09%。结论:使用Cortisomol糊剂封闭纵折裂牙的折裂缝隙能达到明显的封闭效果。     

牙内环形结扎辅助治疗后牙纵裂的临床研究

目的：改进后牙纵裂治疗的固定方法。方法：对47例后牙纵裂采用牙内环形结扎固定加全冠修复。结果：47例后牙纵裂成功29例，进步10例，失败8例，有效率为82．9％，结论：在后牙纵裂的治疗中，牙内环形结扎是一种较好的固定方法。     

牙根纵裂治疗的探讨

目的：探讨对牙根纵裂的治疗方法。方法：对牙根纵裂的裂隙清理、冲洗、消毒，用稀薄的玻璃离子粘合，随机采用结扎丝、带环、临时冠固定，再常规根管治疗，烤瓷冠或金属冠修复。对牙根上1／3纵裂的活动牙组织瓣的去、留分实验组和对照组，实验组：保留活动牙组织瓣，按上述方法修复；对照组：拔除活动牙组织瓣，常规根管治疗，桩钉固位，烤瓷冠或金属冠修复。结果：裂隙临时采用结扎丝、带环、临时冠固定后治疗和修复的成功率分别是69．44％、88．57％、93．88％，临时冠固定与结扎丝同定的差异有显著性，与带环固定的差异无显著性；实验组和埘照组修复的成功率分别是93．75％和33．33％，二者有显著性差异。结论：尽量保存活动的牙组织瓣，用临时冠临时固定后再治疗修复的效果最佳。     

老年人磨牙根折的修复及疗效

目的：观察56例老年人磨牙根折的修复及疗效。方法：采用牙齿半切要，切除56例牙根折侧冠根部分，余留冠根部分分别以全冠（30例）和固定桥（26例）修复。结果：修复治疗后12－25个月复查，疗效为优45例、良10例、差1例，两种修复类型间无明显差异。结论：使用牙体半切要结合不同的固定修复方法，可有效地保留老年人磨牙根折的患牙。     

正畸治疗中磨牙的拔除和保留(三十四)——对称拔除双颌非同名磨牙的矫治设计

目的：探讨对称性拔除双颌非同名磨牙矫治各类错[牙合]的效果。方法： 选取设计拔除磨牙进行矫治的错[牙合]畸形病例92例,其中设计对称性拔除双颌非同名磨牙病例17例（男性6例,女性11例）。全部病例采用直丝弓矫治技术矫治。结果：矫治结束时全部病例均达到尖牙和磨牙的中性关系,前牙覆[牙合]覆盖正常,牙根基本平行,软组织侧貌协调。结论：对称性拔除双颌非同名磨牙矫治错[牙合]畸形亦可获得良好的矫治效果。     

片段弓在磨牙移动中的临床应用

第一磨牙常由于萌出时间较早且为患者家长误认为是乳牙不需治疗而导致严重龋损无法保留、虽经治疗可保留但长期疗效不佳,对于这样的青少年患者,如果龋损同侧的第三磨牙(或牙胚)存在,冠部发育良好并要求矫正者,则可拔除龋损的第一磨牙,用片段弓前移第二磨牙的同时矫治其它牙齿,可以较快的平移第二磨牙到所需位置,提高矫治效率,减少牙齿往返移动和矫治时间.     

Utilization of stainless steel crowns by general dentists and pediatric dental specialists in Indiana

The purpose of this study was to evaluate utilization of the stainless steel crown by both the general and pediatric dentists in Indiana. Although reports indicate that there has been a dramatic reduction in dental caries in the US, almost 20 percent of children have dental decay by age four, with almost 80 percent having a cavity by 17 years of age. After reviewing the literature, Seale has recommended that the stainless steel crown is the most successful restoration for children with a rate of high caries. All dental schools in North America teach the value of using stainless steel crowns and the method of tooth preparation. We hypothesized that greater use of the stainless steel crowns would be made by specialists than by general dentists. In this study, of the 200 questionnaires distributed, 62.5 percent were returned and analyzed. The results imply that stainless steel crowns are being significantly underutilized in general dental practice. It is interesting, and perhaps of concern, that the general dentists are not interested in continuing education courses about this subject. Over the next few years, with the aging of the pediatric dental community in Indiana, general (not specialty) dentists will treat most of the children. Because of this, pre-doctoral education needs to place more emphasis on preparation and utilization of the stainless steel crown.     

Supernumerary tooth in the primary molar region: a case report

Supernumerary teeth are among the most common dental anomalies affecting the primary and permanent dentition. They are usually found in the anterior maxilla and occur infrequently in the primary dentition. The purpose of this paper was to report a case diagnosed with primary supernumerary tooth in the primary second molar region. The crown and root shape of the primary supernumerary tooth resembled that of the primary first molar. On radiographic examination, the primary supernumerary tooth was followed by a permanent supernumerary successor with an unusually big crown. The primary supernumerary molar was immediately extracted to avoid interference with the development of the second premolar's tooth bud. This dental anomaly is rarely observed, as only primary supernumerary teeth in the anterior region have been reported in the dental literature.     

The effects of salivas on occlusal forces

Contacting surfaces of opposing teeth produce friction that, when altered, changes the contact force direction and/or magnitude. As friction can be influenced by several factors, including lubrication and the contacting materials, the aim of this study was to measure the occlusal load alterations experienced by teeth with the introduction of different salivas and dental restorative materials. Pairs of molar teeth were set into occlusion with a weighted maxillary tooth mounted onto a vertical sliding assembly and the mandibular tooth supported by a load cell. The load components on the mandibular tooth were measured with three opposing pairs of dental restorative materials (plastic denture, all‐ceramic and stainless steel), four (human and three artificial) salivas and 16 occlusal configurations. All lateral force component measurements were significantly different (P < 0·0001) from the dry (control) surface regardless of the crown material or occlusal configuration, while the effects of the artificial salivas compared to each other and to human saliva depended on the crown material.     

活髓牙烤瓷修复后牙髓病变临床分析

目的：探讨金属烤瓷修复对活髓牙牙髓组织的影响,分析引起牙髓病变的原因和此类牙髓病变的特点。方法：对827例1146颗活髓基牙烤瓷修复后进行综合性复查。结果：1146颗活髓基牙中有141颗（12．3％）发生不同程度的牙髓病。20岁以前的患活髓牙制作PFM时发生牙髓病变的机率较其它年龄组高,下前牙,双尖牙易发生牙髓病变,牙位与牙髓炎的发生有显性关系。选做固定桥的基牙及因为牙列不齐或轻度错He畸形要求美容修复的牙引起牙髓病变的可能性明显高于单冠牙。牙髓炎的发生与冠边缘的密合性有关,冠边缘与基牙肩台越密合,牙髓炎发生越少。修复前基牙是否曾作龋洞充填与牙髓病变无关。牙髓炎主要集中在修复后1年内表现出症状,以慢性牙髓炎最常见,其次为急性牙髓炎,慢性尖周炎。结论：烤瓷修复后牙髓病变的发生与修复类型,冠边缘密合性,年龄,牙位有关。慢性牙髓炎是牙髓病变是常见类型。