使用计算机化全景追踪、前伸牙合记录和三维锥形束计算机断层扫描成像技术评估髁突矢状向引导角以进行口腔修复。
Evaluation of sagittal condylar guidance angles using computerized pantographic tracings, protrusive interocclusal records, and 3D-CBCT imaging techniques for oral rehabilitation.
作者信息
Naqash T A, Chaturvedi S, Yaqoob A, Saquib S, Addas M K, Alfarsi M
机构信息
Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia.
Department of Periodontics and Community Dental Sciences, College of Dentistry, King Khalid University, Abha, Saudi Arabia.
出版信息
Niger J Clin Pract. 2020 Apr;23(4):550-554. doi: 10.4103/njcp.njcp_544_19.
OBJECTIVE
The goal of registering the condylar guidance is to recreate the patient's occlusion as exactly as possible on the articulator, and is therefore essential for successful prosthodontic rehabilitation. Clinical, radiographic, and pantographic methods are used to determine sagittal condylar guidance angles (SCGAs). These methods generate different angles in the same patients. The present study is the first disquisition to evaluate and correlate SCGAs determined by the use of pantographic tracing (PT), protrusive records (PR), and radiographic (CBCT) techniques.
MATERIALS AND METHODS
The condylar guidance was measured using PT, PR, and CBCT imaging techniques in 23 nonpatient participants aged between 18 and 30 years irrespective of sex. PT was recorded using Cadiax® Compact system, a computerized recorder of SCGAs. PR was obtained using polyvinyl siloxane bite registration material, transferred to a semiadjustable articulator (Denar Mark II, Whip Mix Corp., USA) using facebow transfer (Denar Mark II, Whip Mix Corp., USA) and CR records, to determine SCGAs. Images of the mid-facial region were obtained using CBCT scan for 3D reconstruction. The angle formed between Frankfort horizontal plane (FHP) and a line extending from the most supero-anterior point on the glenoid fossa to the most convex point on the apex of articular eminence (AE) was measured to obtain SCGAs.
RESULTS
The mean left and right SCGAs were as follows: PT (34.42° and 33.93°, respectively), PR (32.14° and 31.82°), and CBCT (38.96° and 38.12°). The Pearson coefficients for the correlations with PT and PR on the left and right sides were 0.899 and 0.907, respectively, while it was 0.911 and 0.934, and 0.842 and 0.874 from PT and CBCT, and PR and CBCT, respectively.
CONCLUSION
Strong correlations were found between SCGAs obtained using PT, PR, and CBCT techniques.
目的
记录髁突引导的目的是在牙合架上尽可能精确地重现患者的咬合关系，因此对于成功的口腔修复治疗至关重要。临床、影像学和全口曲面断层摄影方法用于确定矢状髁突引导角（SCGA）。这些方法在同一患者中产生不同的角度。本研究是首次评估并关联通过全口曲面断层摄影描记（PT）、前伸记录（PR）和影像学（CBCT）技术确定的SCGA的研究。
材料与方法
使用PT、PR和CBCT成像技术对23名年龄在18至30岁之间的非患者参与者（不分性别）测量髁突引导。使用Cadiax® Compact系统记录PT，这是一种SCGA的计算机记录器。使用聚乙烯基硅氧烷咬合记录材料获得PR，通过面弓转移（Denar Mark II，美国Whip Mix公司）和正中关系记录转移到半可调牙合架（Denar Mark II，美国Whip Mix公司）上，以确定SCGA。使用CBCT扫描获取面中区域的图像以进行三维重建。测量法兰克福水平面（FHP）与从关节窝最上前点延伸至关节结节顶点（AE）最凸点的线之间形成的角度以获得SCGA。
结果
左右SCGA的平均值如下：PT（分别为34.42°和33.93°）、PR（32.14°和31.82°）以及CBCT（38.96°和38.12°）。左侧和右侧与PT和PR的相关性的Pearson系数分别为0.899和0.907，而PT与CBCT、PR与CBCT的相关性系数分别为0.911和0.934以及0.842和0.874。
结论
发现使用PT、PR和CBCT技术获得的SCGA之间存在强相关性。
Zotero 插件