Quantitative Clinical Evaluation of the Occlusal Contact Trueness Affected by Six Chairside CAD/CAM Ceramic Materials：a Self-control Study
Phase: NA
Conditions: Tooth Defect
Sponsor: Fujian Medical University

 
 
 
 
 
Quantitative Clinical Evaluation of the Occlusal 
Contact Trueness Affected by Six Chairside CAD/CAM 
Ceramic Materials：a Self-control Study 
 
 
 
ID: 2019028 
NCT number: not yet assigned 
 2019/10/1 
 
 
 
 
 
 
 

Study protocol 
Ten individuals (aged 20–30) will be selected to participate in the study. Selected 
patients should agree to participate in this study by signing a written consent stating, 
approved by the Fujian Medical University Ethics Committee (Code 2019-28), that they 
had been informed of the study. The selection criteria for the participants are as follows: 
(1)with one mandibular first molar requiring crown restoration that have undergone 
root canal treatment; (2)with complete permanent dentition; (3) without carious lesions, 
abrasions, attrition, erosions or any kind of tooth defects; (4) without any kind of 
restorations in occlusal surfaces; (5)without any sign of temporomandibular 
dysfunction. 
InCoris TZl(ZIR), Celtra Duo(CD), IPS e.max(EMA), UPCERA LICI (LC), Vita 
enamic(ENA), UPCERA RUNCI (RC) were used to produce crowns for everyone by 
CEREC chairside CAD/CAM system. The milling trueness, postprocessing trueness 
and clinical adjustment of occlusal contact were quantitatively analyzed by the ATOS 
high-precision scanner and Geomagic reverse engineering software. 
 
Statistical Analysis Plan 
Statistical analysis will perform using SPSS software (SPSS version 26.0; SPSS) at a 
significance level of p=0.05. Descriptive statistics will perform first to obtain an 
overview of the data. A one-way analysis of variance (ANOVA)with randomized block 
design will perform to determine the significant differences on the milling trueness, 
postprocessing trueness and clinical adjustment of occlusal contact. Six groups will 
then be subsequently analyzed with the Bonferroni post hoc test. PASS 15.0 software 
(NCSS LLC, USA) will be used for the power test.