Intra Oral Scanning of Edentulous Arches

October University for Modern Sciences and Arts30 enrolled

Overview

the aim of this study is to compare the influence of different palatal vault configurations on the accuracy and scan speed of IO scans in cases of completely edentulous arches. The null hypothesis is that there is no difference in scanning time, and trueness and precision of IO scans between class I, II and III palatal vault configurations.

A reference model will be created for each of the three groups with different palatal vault configurations. PVS material (DMG Silagum, Germany) will be used for impressions in a one-step process by an experienced operator, and type IV plaster (Heraeus, Germany) will be used to produce the models. These models will then bedigitized by an experienced operator using an extraoral scanner (Trios 3; 3Shape, Copenhagen, Denmark). The STL scan file of the maxillary model will be imported into CAD software (Meshmixer; Autodesk, San Rafael, CA, USA) to generate a reference file. Reference markers will then be added to the digital files to aid the superimposition process during digital subtraction operations.For intraoral scans, the entire maxilla of each patient will be digitally captured using an intraoral scanner (TRIOS POD, 3Shape, Copenhagen, Denmark).According to ISO standards, specifically ISO 5725-1, the accuracy of digital impressions obtained with intraoral scanners (IOS) will be evaluated according to two main parameters: trueness and precision.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Edentulous Jaw

Interventions

digital impressionDIAGNOSTIC_TEST

intra oral scanning

Eligibility

Sex: ALLMin age: 50 YearsMax age: 75 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * 1\. Full tooth loss in the maxilla; 2. Absence of infectious diseases; 3. Systemic good health; 4. Age between 50 and 75 years; 5. Willingness to cooperate throughout the data collection process Exclusion Criteria: * Exclusion criteria included: 1. Presence of any remaining teeth; 2. Inability to comprehend the study's objectives and procedures; 3. Palatal defect or lesion; 4. Postoperative scarring on the palate; 5. Limitations in mouth opening.

Locations (1)

MSA University

Giza, Egypt

Outcomes

Primary Outcomes

Trueness

Trueness is the degree of agreement between the digital impression and the reference scan. To assess trueness, we will measure the deviation between the reference and scanned files

Time frame: 15 days

Secondary Outcomes

precision

Precision, is a statistical measure that quantifies the level of similarity between repeated samples within the same group. In the context of this study, the IOS impression STL files will be compared to each other in a manner similar to the previous comparisons

Time frame: 15 days

Data from ClinicalTrials.gov

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