Thesis
Effect of different ridge heights and duplication methods on the accuracy of mandibular complete denture duplication
University of Iowa
Master of Science (MS), University of Iowa
Spring 2025
DOI: 10.25820/etd.007841
Abstract
Statement of Problem. The precision of complete denture duplication is fundamental to ensuring mandibular dentures’ clinical functionality and comfort. However, variations in ridge height and the choice of duplication technique can significantly affect the accuracy of the final prosthesis. With the continuous development of intraoral scanning technologies, there is a need to evaluate and understand their effectiveness in producing accurate denture duplicates compared to conventional methods.
Purpose. This study evaluated the effect of different ridge heights (low, medium, and high) and two intraoral scanning systems on the accuracy of mandibular complete denture duplication.
Material and Methods. A total of three mandibular dentures representing different mandibular ridge heights were designed using software to ensure high-resolution baseline data. Each denture was scanned again using two intraoral scanners to generate digital models. Trueness and precision were measured by comparing the duplicated scans to the reference scan. The analysis focused on four areas: the teeth, cameo surface, intaglio surface, and the overall complete denture. Deviations were analyzed using 3D analysis software to assess linear and volumetric differences.
Results. The scanners had no statistically significant difference (P > .05). Among different locations, the Trios 5 scanner group showed a statistically significant difference in the base (denture extension area) compared with the dentition and intaglio area (P= .01). For the Trios 5, RMS values were significantly higher for small sizes compared to medium and large (P> .05). In contrast, the PrimeScan showed significantly lower RMS values for small sizes relative to the other sizes.
Conclusions. Ridge height did not influence scan accuracy in denture duplication. However, location significantly impacted accuracy variation, with the denture extension area exhibiting the highest deviations. Both Trios 5 and PrimeScan scanners demonstrated comparable accuracy in denture duplication.
Details
- Title: Subtitle
- Effect of different ridge heights and duplication methods on the accuracy of mandibular complete denture duplication
- Creators
- Yuli Andreina Gonzalez-Moret
- Contributors
- Seok-Hwan Cho (Advisor)Tarek El Kerdani (Committee Member)Shareef Dabdoub (Committee Member)
- Resource Type
- Thesis
- Degree Awarded
- Master of Science (MS), University of Iowa
- Degree in
- Oral Science
- Date degree season
- Spring 2025
- DOI
- 10.25820/etd.007841
- Publisher
- University of Iowa
- Number of pages
- viii, 28 pages
- Copyright
- Copyright 2025 Yuli Andreina Gonzalez-Moret
- Language
- English
- Date submitted
- 04/24/2025
- Description illustrations
- illustrations, tables
- Description bibliographic
- Includes bibliographical references (pages 25-28).
- Public Abstract (ETD)
- The accuracy of denture duplication is essential for ensuring proper function and comfort. Factors like ridge height and scanning technology can affect how precisely a denture is duplicated. Understanding their effectiveness is crucial as intraoral scanners become more common. This study examined how different ridge heights (low, medium, and high) and two intraoral scanners (TRIOS 5 and PrimeScan) impact the accuracy of mandibular denture duplication. Three dentures were designed using Exocad software and 3D printed with SprintRay. High-resolution reference scans were taken with the Ceramill Map 600 to establish baseline data. The dentures were then scanned with TRIOS 5 and PrimeScan, and the accuracy of the scans was evaluated by comparing them to the reference using Geo Magic software. The analysis focused on four areas: teeth, cameo surface, intaglio surface, and the overall denture. Linear and volumetric differences were assessed using 3D analysis software.
- Academic Unit
- Oral Pathology, Radiology and Medicine
- Record Identifier
- 9984830727802771
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