不同颌位记录方法对全口义齿再修复患者咀嚼效率的影响

目的比较3种记录颌位关系方法对全口义齿再修复患者不同时期咀嚼效率的影响。方法随机选择20名全口义齿再修复患者采取自身对照的方法,每位患者分别采用直接咬合法、哥特式弓描记法、哥特式弓联合面弓转移颌位关系法制作3副全口义齿,并比较不同方法下制作的义齿在患者即刻佩戴义齿时、佩戴义齿3个月后的咀嚼效率的差异。结果患者即刻佩戴义齿时咀嚼效率测定结果显示,使用哥特式弓联合面弓转移颌位关系法制作全口义齿的患者咀嚼效率明显高于使用其他2种方法制作全口义齿的患者（P〈0．05）,而使用直接咬合法与哥特式弓描记法制作全口义齿的患者咀嚼效率没有差异;佩戴义齿3个月后,3组患者的咀嚼效率无明显差异。结论使用哥特式弓联合面弓转移颌位关系法可为患者提供更可靠的颌位记录方法,可以提高患者的即刻咀嚼效率,提高患者的满意度和医生的工作效率。     

吸光度法对30例全口义齿咀嚼效能的比较研究

目的：比较不同方法制作全口义齿的咀嚼效能。方法：应用吸光度法测量30例无牙颌患者分别采用直接咬合法和哥特氏弓描记法确定正中关系制作完成的全口义齿的咀嚼效能。结果：经统计学分析,哥特式弓描记法优于直接咬合法制作的全口义齿。结论：哥特式弓描记法是可推广的确定正中颌位关系的方法。     

正中关系位记录方法

正中关系位对全口义齿的修复、咬合重建、牙合关系紊乱的检查与治疗、牙体修复、正畸矫治及颞颌关节功能紊乱综合征的检查与治疗等都有重要意义。传统正中关系位的记录方法包括哥特式弓描记法、吞咽咬合法、卷舌后舔法、功能反射法、颏区诱导法、双侧扶持下颌法、下颌运动轨迹描记法、肌监测仪法等,这些方法均需要患者的极大配合,而且灵活性较大,可重复性较差,初学者不易掌握。文章在概述了传统正中关系位记录方法之后,介绍了一种新的记录方法——Leaf Gauge（正中关系咬合片）法,该方法的使用无需太多临床经验,初学者容易掌握,且重复性强、精确度高。     

面弓转移对改善全口义齿修复疗效的随机对照研究

目的:评估面弓转移在全口义齿修复中的应用疗效.方法:选取无牙颌患者45例,随机分两组:对照组给予传统全口义齿修复(平均值颌位记录),实验组采用面弓转移进行全口义齿修复,采用问卷调查和T-Scan系统分别进行主客观疗效评估.结果:实验组患者和医师对义齿的功能评分(舒适度、固位性)和主观满意度明显较高(P＜0.05),且戴...     

无牙颌正中关系位的哥特式弓描记与转移

目前一般认为确定无牙颌水平关系即确定正中关系位,哥特式弓描记法是唯一在确定关系时可客观观察下颌后退程度的方法。它利用固定于上下颌弓上的装置记录下颌运动时的信息,描记出雨伞状的划痕,雨伞顶点即被认为是正中关系位点。本文详细介绍了利用哥特式弓描记法记录与转移正中关系位的临床规范操作方法,主要内容包括安装描记盘、固定描记针、口内描记、记录正中关系位和转移至牙合架等操作,每一步操作都通过相应的临床图片进行详细说明。     

不同方法确定水平颌位关系的全口义齿的咬合对比

目的:通过T-Scan Ⅱ对由不同方法确定水平颌位关系的全口义齿的咬合情况进行对比分析研究.方法:对12例口颌系统基本正常的无牙颌患者在相同垂直高度的条件下,同时制作了由哥特式弓轨迹顶点、哥特式弓轨迹顶点直向前lmm以及自然咬合法确定的三种水平颌位关系的全口义齿(分别记作义齿A、B、C),用T-ScanⅡ咬合力计检测义齿调(牙合)前、后左右两侧(牙合)力百分比的差值、(牙合)力中心点到中线的垂直距离以及咬合接触时间三项指标,SPSS 13.0软件包对结果进行统计学分析.结果:调(牙合)前,义齿A、B左右两侧(牙合)力百分比的差值、(牙合)力中心点到中线的垂直距离相比义齿C差异有统计学意义(P＜0.05),义齿A咬合接触时间明显长于义齿B和C(P＜0.05).义齿A调(牙合)前后只有咬合接触时间显著减少,其他两项指标调(牙合)前后差异无统计学意义.义齿B调(牙合)前后三项指标差异均无统计学意义.义齿C左右两侧(牙合)力百分比的差值、(牙合)力中心点到中线的垂直距离调(牙合)前后差异有统计学意义,咬合接触时间调(牙合)前后无明显变化.结论:在哥特式弓轨迹定点前lmm确定水平颌位关系的全口义齿的咬合更能与肌肉、关节协调一致.     

3种方法确定水平颌位关系的全口义齿咀嚼肌肌电活动及咀嚼效率分析

目的通过肌电图及吸光光度法比较3种方法确定水平颌位关系的全口义齿的咬肌和颞肌前束的肌电活动以及义齿的咀嚼效率。方法对10例口颌系统基本正常的无牙颌患者在适宜的垂直距离条件下,同时制作由哥特式弓轨迹顶点、哥特式弓轨迹顶点前1 mm以及直接咬合法确定水平颌位关系的3副全口义齿,分别记作义齿A、B和C。用肌电诱发电位仪分别记录患者戴用3副义齿在正中牙合大力咬合及咀嚼过程中的咬肌和颞肌前束肌电图,记录肌电幅值,计算左右两侧咬肌和颞肌前束的不对称指数;用吸光光度法评价3副义齿的咀嚼效率;通过SPSS 17.0软件对所得数据进行统计学分析。结果在正中牙合大力咬合及咀嚼运动过程中,义齿B和义齿C的肌电幅值明显高于义齿A（P<0.05）,义齿C的不对称指数最高,明显高于义齿A和B（P<0.05）。义齿B和C咀嚼效率的差异无统计学意义（P>0.05）,均高于义齿A（P<0.05）。结论在哥特式弓轨迹顶点前1 mm处建立水平颌位关系的全口义齿的肌电活动更强且更加平衡,有利于咀嚼肌功能的发挥,咀嚼效率较高。     

运用嚼肌颞肌髁突联合触诊校对颌位关系的临床体会

运用嚼肌颞肌髁突联合触诊校对颌位关系的临床体会西安市第二人民医院口腔科李焕云第四军医大学口腔医学院施生根指导颌位关系的确定和转移是全口义齿及复杂可摘义齿修复中的一个关键步骤。义齿的生理咬合功能，必须建立在正确的颌位关系上。颌位记录有四个基本步骤：确定...     

两校口腔医生制作全口义齿时使用面弓情况的调查

目的：调查全口义齿制作过程中面弓应用情况及其意义.方法：问卷调查两所口腔医学院修复科36名医生.结果：91.67%的医生认为其90%以上的患者对疗效满意：所有医生均不常用面弓,61.11%从未用过面弓.38.89%认为不用面弓影响义齿质量,19.44%认为面弓无价值.77.78%认为用简单[牙合]架修复的质量低于用全可调试[牙合]架.所有医生都认为颌位关系重要.戴牙时75%的医生调[牙合].结论：制作全口义齿并非必须使用面弓,调[牙合]等是弥补义齿微小误差的重要步骤.     

两种颌位关系转移法导致非正中咬合误差的比较

he架是模拟下颌运动和咬合接触的工具，真实地反映口内咬合的实际情况，是学者们努力的目标。本项研究以患者口内咬合记录为标准，探讨采用特殊he叉转移法与采用ARCUS EWL面弓(KaVo公司，德国)转移法转移颌位关系所导致的he架非正中咬合误差的大小，为前者的临床应用提供指导。     

154例无牙颌患者哥特式弓口内描记法描记图形分析与分类

目的：根据口内哥特式弓描记轨迹图形的特点，对哥特式弓描记轨迹进行分类，并探讨每种分类的判读方法和影响因素。方法：随机选取154例无牙颌患者，运用美国Geneva Dental公司生产的口内哥特式弓描记仪描记运动轨迹，并记录患者是否存在偏侧咀嚼习惯、旧义齿的咬合情况以及是否患有瘫痪帕金森综合征等全身疾病，运用spss的ordin regression分析这些因素与轨迹分型的关系。结果：根据哥特式弓描记图形大致分为5种类型：尖顶型、圆顶型、多顶点型、偏侧型和单点型。偏侧咀嚼，旧义齿的咬合情况，以及是否患有瘫痪等全身疾病对分型存在影响，并具有统计学意义。结论：尖顶型描记轨迹颌位关系位于尖顶的顶端，易于判断，圆顶型多位于圆顶两边延长线所组成的角的角分线与圆顶的交界附近，多顶点型需要对每个顶点进行验证，偏侧型位于偏侧方的顶点附近单点型就是这一点的位置。偏侧咀嚼，旧义齿的咬合情况，以及是否患有瘫痪等全身疾病对分型存在影响，影响的作用依次减小。     

A Comparative Evaluation of Static and Functional Methods for Recording Centric Relation and Condylar Guidance: A Clinical Study

To evaluate and compare the centric relation and horizontal condylar guidance using interocclusal wax and extra oral Gothic arch methods and subjective evaluation of dentures thus fabricated. Centric relation and horizontal condylar guidance was recorded by using interocclusal wax and gothic arch tracing in 28 completely edentulous patients. These records were transferred to the articulator and difference in both values was recorded. After that patients were divided in two groups according to the centric relation and horizontal condylar guidance recording method used to achieve balanced occlusion. Response of the dentures was subjectively evaluated using “Woelfel subjective evaluation criteria”. Centric relation recorded by both the methods did coincide in 7.14 % of patients. Centric relation recorded by interocclusal wax was posterior to Gothic centric relation in 21.43 % of patients, and anterior to Gothic centric relation in 71.42 % patients. Gothic arch tracings gave higher mean guidance values on both the sides as compared to protrusive wax record in all the subjects, although the difference was statistically insignificant (P > 0.05). Subjective evaluation showed statistical insignificance for all the parameters in both groups. Gothic arch method records the centric relation at a more posterior position than the Static method, but it does not make any difference in clinical performance of the complete denture. Horizontal condylar guidance angle was approximately similar by both the methods.     

Part‐Digitizing System of Impression and Interocclusal Record for Complete Denture Fabrication

Few studies have reported the application of digital technology to removable dentures, particularly for the process of impression and interocclusal recording for complete denture fabrication. This article describes a part‐digitizing system of impression and interocclusal records for complete denture fabrication. The denture foundation area in an edentulous mouth, including the border areas and residual ridge, is outlined by tracing the surfaces with a 3‐D pen‐type digitizer. Specialized trays for final impressions and interocclusal records were generated using computer‐aided design and manufactured using the digital data. Final impression and interocclusal records were carried out using these specialized trays. The computer‐aided method using preliminary digital impressions and specialized trays would be feasible for clinical use for complete denture fabrication.     

Maximizing mandibular prosthesis stability utilizing linear occlusion, occlusal plane selection, and centric recording.

The stability of mandibular complete dentures may be improved by reducing the transverse forces on the denture base through linear (noninterceptive) occlusion, selecting an occlusal plane that reduces horizontal vectors of force at occlusal contact, and utilizing a central bearing intraoral gothic arch tracing to record jaw relations. This article is intended to acquaint the reader with one technique for providing stable complete denture prostheses using the aforementioned materials, devices, and procedures.     

A clinical study of horizontal jaw relationships in edentulous patients

Six methods of registering horizontal jaw relationships were investigated on 13 edentulous patients in order to find the consistency of each method and any differences in location between them.

Graphical recordings were made using intra-oral acrylic resin appliances. The upper appliance incorporated a central bearing point and the lower a recess for accommodating interchangeable steel plates. Each tracing was made on a separate plate which had been painted with blue layout fluid. The recordings were measured on a modified microscope to give mediolateral and anteroposterior readings.

The results showed that the active gothic arch tracing method was the most consistent of the methods studied. Passive retruded closure and active closure from rest position showed low consistency in comparison. Passive retruded closure was recorded an average of 0·21 mm posteriorly to the active gothic arch tracing. Active closure from rest position was recorded an average of 0·63 mm anteriorly to the active gothic arch tracing.     

不同咬合记录方式制作后牙单冠的咬合适合性研究

目的 评估不同咬合记录方式在后牙单冠修复体咬合适合性方面的差异。方法 选择10例拟后牙单冠修复的患者,利用5种不同的咬合记录方式分别制作5个单冠。实验分组：以Co组（Artex CR + O-Bite咬合记录）为参照,其他4种咬合记录方式为实验组,包括3s组（3Shape TRIOS 3静态咬合记录）和3d组（3Shape TRIOS 3动态咬合记录）、Ka组（KaVo ARCUS digma）、Pr组（Dentograf）。通过患者满意度评分,T-scan Ⅲ咬合记录分析仪记录咬合时间（occlusion time,OT）和咬合分离时间（disocclusion time,DT）及医师椅旁调牙合时间来评价单冠修复体咬合的适合性。结果 5种咬合记录方式在制作后牙单冠的患者满意度评分、ΔOT和ΔDT值以及医师椅旁调牙合时间上都没有统计学差异（P>0.05）。结论 后牙单冠制作时,多种结合下颌运动的咬合记录方式都可以取得良好的临床效果。     

Evaluation of the use of and attitudes towards a face-bow in complete denture fabrication: a pilot questionnaire investigation in Chinese prosthodontists

Summary  The aim of this study was to assess the use of and attitudes towards a face-bow among Chinese prosthodontists in complete denture fabrication. Thirty-six prosthodontists in two dental hospitals affiliated separately to two of the top four dental schools in China were included. A questionnaire was sent to them with 18 questions covering the following four aspects: (i) the education and experience background of the prosthodontists, (ii) their impression of the quality of the dentures, (iii) the use of and attitudes towards a face-bow in complete denture fabrication and (iv) their understanding of jaw relationship and occlusal adjustment in complete denture fabrication. Most (97%) experienced Chinese prosthodontists seldom used a face-bow in complete denture fabrication. Although they (92%) believed that more than 90% of their edentulous patients were satisfied with the complete dentures, 39% of them thought that not using a face-bow might lower the quality of complete dentures and 94% believed that there was a difference between the quality of dentures fabricated with an adjustable articulator and those made with a simple articulator. Among the 36 prosthodontists, 75% often and 8% occasionally did the occlusal adjustment when giving the newly made dentures to their patients. The great majority of prosthodontists in two of top four Chinese dental hospitals, who believed most of their patients satisfied with their complete dentures, seldom used a face-bow. Occlusal adjustment may be helpful to eliminate the possible errors caused by not using a face-bow.     

A denture tray technique for remake dentures

A technique is described to fabricate a replacement denture for your patient. It reduces patient and laboratory time. The technique does not compromise the patient's existing denture, the impression, jaw relation records, or esthetics. It provides superior trays and effective occlusion rims, thus simplifying recording techniques. A denture duplicating flask