Purpose: The purpose of this study was to investigate the effect of splinting scan bodies intraorally on the trueness and scan time of implant digital impressions of the edentulous arch.

Materials and Methods: Nineteen edentulous jaws undergoing fixed complete denture treatment with a minimum of 4 implants were selected for this study. Verified master casts of the patients’ edentulous jaws were scanned with a desktop laboratory scanner and scan bodies to obtain a reference (control) scan for each patient. Intraoral scan bodies were hand tightened on all the implants in the edentulous arch and an intraoral scan was taken with an intraoral scanner for each jaw; these scans represented the first test group. The same scan bodies were splinted using floss and pattern resin and the edentulous arch was scanned again for all patients; these scans represented the second test group. The scan time for the first and second scan of each patient was recorded. To compare the trueness of the un-splinted scan to the splinted scan, the STL files of the two scans were superimposed to the control scan and positional and angular deviation were analyzed using Geomagic software. One sample T test was used to compare each group’s distance and angular deviation to the control. ANOVA test was conducted to examine the effect of the scan technique on trueness (distance deviation/angular deviation) and scan time (α=0.05 for all tests).

Results: There was no statistically significant difference in 3-Dimensional global positional deviation (p = .493) or in the X (p = .794), Y (p = .435), and Z axes (p = .871) between the splinted and un-splinted scan groups. No statistically significant difference in angular deviation was found between the splinted and un-splinted experimental groups as well (p = .250). A statistically significant difference in mean scan time was found between group 1 (un-splinted) and 2 (splinted) (p = .001). The fastest scan time was found with the splinted group with an average of 2-minute faster scan time.

Conclusions: Splinting implant scan bodies intraorally does not affect the trueness of complete arch digital impressions but can reduce scan time.

LLU Discipline





School of Dentistry

First Advisor

Mathew T. Kattadiyil

Second Advisor

Montry S. Suprono

Third Advisor

Antoanela Garbacea

Degree Name

Master of Science (MS)

Degree Level


Year Degree Awarded


Date (Title Page)




Library of Congress/MESH Subject Headings

Computer-Aided Design; Dental Impression Technique; Imaging, Three-Dimensional; Models, Dental.



Page Count

x, 41 p.

Digital Format


Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.


Loma Linda University Electronic Theses and Dissertations

Collection Website



Loma Linda University. Del E. Webb Memorial Library. University Archives