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| Name | Class |
|---|---|
| Assiut University | OTHER |
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Intra oral scanning can perform a full digital workflow right on the patient's mouth. Recently an intra-oral photogrammetry scanner has been introduced in the market that can make intra-oral tissue scanning in addition to a built-in photogrammetry technology so that it can capture fixture locations through special intra-oral scan flags.
Intraoral scanning had several advantages to intraoral direct scanning, including less storage and transportation needs, faster scanning times, and increased patient comfort. The intraoral scan bodies are used as digital fixture locators when using IOSs for implant impressions.
Photogrammetry is the science and technology of obtaining reliable information about physical objects through the process of recording, measuring, and interpreting photographic images and patterns of electromagnetic radiant imagery. The utilization of photogrammetry in the dental field leads to exclusion of intraoral dental and gingival anatomies while scanning the implant coordinates. In addition, no need for stitching during full arch implant scanning which is reflected in the trueness and precision of the scanned object. Exclusion of unstable mucosa during scanning and avoidance of stitching make the passive seating of implant prosthesis a more predictable procedure especially when compared with intra-oral scanning only.
Up to this moment, all photogrammetry systems available in the market are considered extraoral systems that require an additional impression for soft tissue capture whether conventional or digital. Recently an intra-oral photogrammetry scanner (IPS) has been introduced in the market that can make intra-oral tissue scanning in addition to a built-in photogrammetry technology so that it can capture fixture locations through special intra-oral scan flags.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| intraoral photogrammetry scanning | Experimental |
| |
| Intra oral scanning | Active Comparator |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Digital scanning | Procedure | . For each patient three digital files will be obtained: One reference scan, one conventional IOS scan, and one IPS scan. All the STL files will be imported to dental CAD software, and scan bodies will be converted to implant multi-unit ti-base using a digital library. The updated STL files will be imported to inspection software Mimics for trueness assessments. The three-dimensional discrepancy between 2 STL files will be evaluated in terms of linear and angular deviation. A central point & central axis of the virtual MUA ti-base was used for deviation measurements. Linear deviations will be assessed for each MUA tibase on the three-space axis (X longitudinal, Y lateral, and Z vertical) using the center of the ti-base heads for the deviation measurement. Angular deviations were assessed as the angles formed by the two lines passing perpendicularly through the centers of the test image and the reference image of each ti-base. |
| Measure | Description | Time Frame |
|---|---|---|
| Degree of Trueness | The clinical performance of conventional intraoral scanners (IOS) and intraoral photogrammetry scanners (IPS) for each patient enrolled in the study with a paired comparison of the deviation differences | 4 months following implant insertion |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Faculty of Dentistry Ain Shams University | Cairo | Abbassia | 11566 | Egypt | ||
| Faculty of Dentistry Ain Shams University |
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| Two digital impressions will be recorded, one with a conventional intra-oral scanner and another one with an intra-oral photogrammetry scanner. | Procedure | . For each patient three digital files will be obtained: One reference scan, one conventional IOS scan, and one IPS scan. All the STL files will be imported to dental CAD software, and scan bodies will be converted to implant multi-unit ti-base using a digital library. The updated STL files will be imported to inspection software Mimics for trueness assessments. The three-dimensional discrepancy between 2 STL files will be evaluated in terms of linear and angular deviation. A central point & central axis of the virtual MUA ti-base was used for deviation measurements. Linear deviations will be assessed for each MUA tibase on the three-space axis (X longitudinal, Y lateral, and Z vertical) using the center of the ti-base heads for the deviation measurement. Angular deviations were assessed as the angles formed by the two lines passing perpendicularly through the centers of the test image and the reference image of each ti-base. |
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| Cairo |
| Abbassia |
| 15666 |
| Egypt |