Private practice, Seattle, Wash.
Clinical Assistant Professor, University of British Columbia, Vancouver, Canada.
J Prosthet Dent. 2020 Dec;124(6):667-673. doi: 10.1016/j.prosdent.2019.11.014. Epub 2020 Feb 1.
Although in vitro studies have investigated the accuracy of virtual interocclusal records, clinical research on their ability to register virtual dental casts accurately is lacking.
The purpose of this clinical study was to evaluate the accuracy and reproducibility of the virtual interocclusal records of an intraoral scanning system compared with conventional polyvinyl siloxane (PVS) interocclusal records.
Three conventional interocclusal records followed by 3 virtual interocclusal records per side per participant were made in 10 participants. Three sites of close proximity (SCP) and 3 sites of clearance (SC) per side per participant were identified on the transilluminated conventional interocclusal PVS records for a total of 60 SCP and SC. The presence or absence of these sites on the virtual interocclusal records was analyzed by using an independent software program.
The sensitivity for correct identification in the virtual interocclusal record was 87%, and its specificity was 95%. The positive predictive value was 95%, and the negative predictive value was 88%. For reproducibility, 74% of the SCP were detected consistently for all 3 repeated scans, and 92% of the SCs were identified accurately.
The accuracy of virtual interocclusal records in identifying interocclusal contacts is clinically acceptable. However, the method tends to miss interocclusal contacts rather than introducing false ones and can result in perforations between the opposing virtual casts. Repeated buccal occlusal scans made of the same side showed fair reproducibility, and this aspect would benefit from further investigation.
尽管体外研究已经调查了虚拟咬合记录的准确性，但缺乏关于其准确记录虚拟牙颌模型的能力的临床研究。
本临床研究的目的是评估一种口内扫描仪的虚拟咬合记录的准确性和可重复性，与传统的聚硅氧烷（PVS）咬合记录相比。
每个参与者的每侧制作 3 个传统咬合记录和 3 个虚拟咬合记录。每个参与者的每侧确定 3 个近接部位（SCP）和 3 个间隙部位（SC），总共 60 个 SCP 和 SC。使用独立的软件程序分析虚拟咬合记录上这些部位的存在或缺失。
虚拟咬合记录中正确识别的灵敏度为 87%，特异性为 95%。阳性预测值为 95%，阴性预测值为 88%。对于可重复性，74%的 SCP 在所有 3 次重复扫描中都被一致检测到，92%的 SC 被准确识别。
虚拟咬合记录在识别咬合接触方面的准确性在临床是可以接受的。然而，该方法往往会错过咬合接触，而不是引入虚假的接触，并且可能导致对颌虚拟模型之间的穿孔。同一侧的重复颊侧咬合扫描显示出良好的可重复性，这方面需要进一步研究。
