Learning curve of digital intraoral scanning – an in vivo study

Abstract Background The spread of digital technology in dentistry poses new challenges and goals for dentists. It is important to involve new methods and devices in university education. The aim of the present in vivo study was to determine the learning curve of IOS described by (1) scanning time and (2) image number (count of images made by intraoral scanner during scanning process).Methods Ten dental students of Semmelweis University took part in the study. Dental students took digital study impressions using 3Shape Trios 3® (Copenhagen, Denmark) IOS device. Each student took 10 digital impressions on volunteers (for standardization the first and the last patients was the same for each student). The inclusion criteria of patients were full dentition (except missing third molar) and no prosthetic- restorative treatment. Digital impression taking was preceded by a lecture consisting of two parts: education and training. For standardization, the scanning device was calibrated before impression taking, followed by the registration of patient data. Digital impressions were taken of the upper and lower arches, and the bite was recorded according to the manufacturer's instructions. Total scanning time and image number of intraoral scanning were recorded.Results The difference of scanning time between the first and the tenth digital impressions was significant (p=0.007). The average scanning time of first impressions was 23min 9sec, for tenth impressions it was 15min 28sec. The difference between scanning time of the first and the tenth impressions was 7min 41sec. The average image number of the first impressions was 1964.5, for the tenth impressions it was 1468.6. The difference between number of images of the first and the tenth impressions was 495,9. The curve of image number show decreasing tendency first, then has a trough around the sixth measurement, and rises.Conclusion The learning curve of IOS can be described with scanning time and image number of digital impression. Scanning time decreases as result of practice. Shorter scanning times are accompanied by poorer coverage quality, the operator has to correct by adding extra images represented by the curve of image numbers which turning into increasing tendency after the sixth measurement.Trial registration: The permission for this study was given by the University Ethics Committee of Semmelweis University (SE TUKEB number: 61/2016).

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Learning curve of digital intraoral scanning – an in vivo study

10.21203/rs.3.rs-19321/v4 ◽

2020 ◽

Author(s):

Ivett Róth ◽

Alexandra Czigola ◽

Gellért Levente Joós-Kovács ◽

Magdolna Dalos ◽

Péter Hermann ◽

...

Keyword(s):

Learning Curve ◽

Dental Students ◽

First Impressions ◽

In Vivo Study ◽

Digital Impression ◽

Scanning Time ◽

Intraoral Scanning ◽

Digital Impressions ◽

The Difference

Abstract Background: The spread of digital technology in dentistry poses new challenges and goals for dentists. It is important to involve new methods and devices in university education. The aim of the present in vivo study was to determine the learning curve of IOS described by (1) scanning time and (2) image number (count of images made by intraoral scanner during scanning process). Methods: Ten dental students of Semmelweis University took part in the study. Dental students took digital study impressions using 3Shape Trios 3® (Copenhagen, Denmark) IOS device. Each student took 10 digital impressions on volunteers (for standardization the first and the last patients was the same for each student). The inclusion criteria of patients were full dentition (except missing third molar) and no prosthetic- restorative treatment. Digital impression taking was preceded by a lecture consisting of two parts: education and training. For standardization, the scanning device was calibrated before impression taking, followed by the registration of patient data. Digital impressions were taken of the upper and lower arches, and the bite was recorded according to the manufacturer's instructions. Total scanning time and image number of intraoral scanning were recorded. Results: The difference of scanning time between the first and the tenth digital impressions was significant (p=0.007). The average scanning time of first impressions was 23min 9sec, for tenth impressions it was 15min 28sec. The difference between scanning time of the first and the tenth impressions was 7min 41sec. The average image number of the first impressions was 1964.5, for the tenth impressions it was 1468.6. The difference between number of images of the first and the tenth impressions was 495,9. The curve of image number show decreasing tendency first, then has a trough around the sixth measurement, and rises. Conclusion: The learning curve of IOS can be described with scanning time and image number of digital impression. Scanning time decreases as result of practice. Shorter scanning times are accompanied by poorer coverage quality, the operator has to correct by adding extra images represented by the curve of image numbers which turning into increasing tendency after the sixth measurement.

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Learning curve of digital intraoral scanning – an in vivo study

10.21203/rs.3.rs-19321/v2 ◽

2020 ◽

Author(s):

Ivett Róth ◽

Alexandra Czigola ◽

Gellért Levente Joós-Kovács ◽

Magdolna Dalos ◽

Péter Hermann ◽

...

Keyword(s):

Learning Curve ◽

Dental Students ◽

First Impressions ◽

In Vivo Study ◽

Intraoral Scanner ◽

Scanning Time ◽

Intraoral Scanning ◽

Digital Impressions ◽

The Difference

Abstract Background: The spread of digital technology in dentistry poses new challenges and goals for dentists. The aim of the present in vivo study was to determine the learning curve of intraoral scanning described by (1) scanning time and (2) image number (count of images made by intraoral scanner during scanning process). Methods: Ten dental students of Semmelweis University, took part in the study. Dental students took digital study impressions using 3Shape Trios 3® (3Shape, Copenhagen, Denmark) intraoral scanning device. Each student took 10 digital impressions on volunteers (for standardization the first and the last volunteers was the same for each student). The inclusion criteria of volunteers were full dentition (except missing third molar) and no prosthetic- restorative treatment. Digital impression taking was preceded by a lecture consisting of two parts: theoretical education and practical training. Digital impressions were taken of the upper and lower arches, and the bite was recorded according to the manufacturer's instructions. Total scanning time and image number of intraoral scanning were recorded. Results: The difference of scanning time between the first and the tenth digital impressions was significant (p=0.007). The average scanning time of first impressions was 23 min 9 sec, for tenth impressions it was 15 min 28 sec. The difference between scanning time of the first and the tenth impressions was 7 min 41 sec. The average image number of the first impressions was 1964.5, for the tenth impressions it was 1468.6. The difference between number of images of the first and the tenth impressions was 495,9. The curve of image number show decreasing tendency first, then has a trough around the sixth measurement, and rises. Conclusion: Based on our results there was association between the sequential number of measurements and the outcome variables. The scanning time decreased because of the repetitive use of intraoral scanner. The image number first showed decreasing tendency and after sixth measurement it increased, there is no consistent decline in mean scanning picture. Scanning time decreased because the students move the scanning tip faster as result of practice. Shorter scanning times are accompanied by poorer coverage quality, the operator has to correct by adding extra images represented by the curve of image numbers which turning into increasing tendency after the sixth measurement. Trial registration: The permission for this study was given by the University Ethics Committee of Semmelweis University (SE TUKEB number: 61/2016).

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Learning curve of digital intraoral scanning – an in vivo study

BMC Oral Health ◽

10.1186/s12903-020-01278-1 ◽

2020 ◽

Vol 20 (1) ◽

Author(s):

Ivett Róth ◽

Alexandra Czigola ◽

Gellért Levente Joós-Kovács ◽

Magdolna Dalos ◽

Péter Hermann ◽

...

Keyword(s):

Learning Curve ◽

Dental Students ◽

First Impressions ◽

In Vivo Study ◽

Practical Training ◽

Scanning Time ◽

Intraoral Scanning ◽

Digital Impressions ◽

The Difference

Abstract Background The spread of digital technology in dentistry poses new challenges and sets new goals for dentists. The aim of the present in vivo study was to determine the learning curve of intraoral scanning described by (1) scanning time and (2) image number (count of images created by intraoral scanner during the scanning process). Methods Ten dental students of Semmelweis University took part in the study. Dental students took digital study impressions using a 3Shape Trios 3® (3Shape, Copenhagen, Denmark) intraoral scanning device. Each student took 10 digital impressions on volunteers. Volunteer inclusion criteria included full dentition (except for missing third molars) and no prosthetic/restorative treatment. Digital impression taking was preceded by tuition consisting of both theoretical education and practical training. Digital impressions were taken of the upper and lower arches, and the bite was recorded according to the manufacturer's instructions. Total scanning times and image numbers were recorded. Results The difference in scanning time between the first and the tenth digital impressions was significant (p = 0.007). The average scanning time for the first impressions was 23 min 9 s; for the tenth impressions, it was 15 min 28 s. The difference between the scanning times of the first and the tenth procedures was 7 min 41 s. The average image count for the first impressions was 1964.5; for the tenth impressions, it was 1468.6. The image count difference between the first and the tenth procedures was 495.9. The image count versus sequential number of measurement curve shows an initial decreasing tendency followed by a trough around the sixth measurement and a final increasing phase. Conclusion Our results indicate an association between the sequential number of measurements and the outcome variables. The drop in scanning time is probably explained by a practice effect of repeated use, i.e. the students learned to move the scanning tip faster. The image count first showed a decreasing tendency, and after the sixth measurement, it increased; there was no consistent decline in mean scan count. Shorter scanning times are associated with poorer coverage quality, with the operator needing to make corrections by adding extra images; this manifests as the time function of image counts taking an increase after the sixth measurement.

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Learning curve of digital intraoral scanning – an in vivo study

10.21203/rs.3.rs-19321/v3 ◽

2020 ◽

Author(s):

Ivett Róth ◽

Alexandra Czigola ◽

Gellért Levente Joós-Kovács ◽

Magdolna Dalos ◽

Péter Hermann ◽

...

Keyword(s):

Learning Curve ◽

Dental Students ◽

First Impressions ◽

In Vivo Study ◽

Practical Training ◽

Scanning Time ◽

Intraoral Scanning ◽

Digital Impressions ◽

The Difference

Abstract Background: The spread of digital technology in dentistry poses new challenges and sets new goals for dentists. The aim of the present in vivo study was to determine the learning curve of intraoral scanning described by (1) scanning time and (2) image number (count of images created by intraoral scanner during the scanning process).Methods: Ten dental students of Semmelweis University took part in the study. Dental students took digital study impressions using a 3Shape Trios 3® (3Shape, Copenhagen, Denmark) intraoral scanning device. Each student took 10 digital impressions on volunteers. Volunteer inclusion criteria included full dentition (except for missing third molars) and no prosthetic/restorative treatment. Digital impression taking was preceded by tuition consisting of both theoretical education and practical training. Digital impressions were taken of the upper and lower arches, and the bite was recorded according to the manufacturer's instructions. Total scanning times and image numbers were recorded.Results: The difference in scanning time between the first and the tenth digital impressions was significant (p=0.007). The average scanning time for the first impressions was 23 min 9 sec; for the tenth impressions, it was 15 min 28 sec. The difference between the scanning times of the first and the tenth procedures was 7 min 41 sec. The average image count for the first impressions was 1964.5; for the tenth impressions, it was 1468.6. The image count difference between the first and the tenth procedures was 495.9. The image count versus sequential number of measurement curve shows an initial decreasing tendency followed by a trough around the sixth measurement and a final increasing phase.Conclusion: Our results indicate an association between the sequential number of measurements and the outcome variables. The drop in scanning time is probably explained by a practice effect of repeated use, i.e. the students learned to move the scanning tip faster. The image count first showed a decreasing tendency, and after the sixth measurement, it increased; there was no consistent decline in mean scan count. Shorter scanning times are associated with poorer coverage quality, with the operator needing to make corrections by adding extra images; this manifests as the time function of image counts taking an increase after the sixth measurement.Trial registration: This study was approved by the University Ethics Committee of Semmelweis University (SE TUKEB number: 61/2016).

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Learning curve of digital intraoral scanning – an in vivo study

10.21203/rs.3.rs-19321/v5 ◽

2020 ◽

Author(s):

Ivett Róth ◽

Alexandra Czigola ◽

Gellért Levente Joós-Kovács ◽

Magdolna Dalos ◽

Péter Hermann ◽

...

Keyword(s):

Learning Curve ◽

Dental Students ◽

First Impressions ◽

In Vivo Study ◽

Practical Training ◽

Scanning Time ◽

Intraoral Scanning ◽

Digital Impressions ◽

The Difference

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Accuracy of intraoral scan images in full arch with orthodontic brackets: a retrospective in vivo study

Clinical Oral Investigations ◽

10.1007/s00784-021-03792-0 ◽

2021 ◽

Author(s):

Young-Kyun Kim ◽

So-Hyun Kim ◽

Tae-Hyun Choi ◽

Edwin H. Yen ◽

Bingshuang Zou ◽

...

Keyword(s):

Orthodontic Brackets ◽

Digital Impression ◽

Orthodontic Bracket ◽

Average Surface ◽

Mandibular Arch ◽

Surface Errors ◽

Digital Impressions ◽

Surface Deviations ◽

Orthodontic Patients

Abstract Objectives The purpose of this retrospective study was to evaluate the accuracy of intraoral scan (IOS) images in the maxillary and mandibular arches with orthodontic brackets. Material and methods From digital impressions of 140 patients who underwent orthodontic treatment, consecutive IOS images were selected based on standardized inclusion criteria: Two pre-orthodontic IOS images (IOS1 and IOS2) of permanent dentition with fully erupted second molars and IOS images obtained immediately after orthodontic bracket bonding (IOSb). Superimpositions were performed to evaluate the reproducibility of repeated IOS images. Accuracy of IOSb images was analyzed by comparing the average surface errors between IOS1c and IOS2c images, which were IOS images cut based on the same region of the interest as between IOS1 and IOSb images. Results A total of 84 IOS images was analyzed. The average surface errors between IOS1 and IOS2 images were 57 ± 8 μm and 59 ± 14 μm in the maxillary and mandibular arch, respectively, and their reliability was almost perfect. The average errors between IOSb and IOS1c images exhibited an increase, which measured 97 ± 28 μm in the maxillary arch and 95 ± 29 μm in the mandibular arch. These surface deviations between IOSb and IOS1c images were significantly larger in each region as well as entire dentition (P < 0.001) compared to those between IOS1c and IOS2c images. Conclusions The average surface errors of the scans with brackets showed increased values compared with those without brackets. This suggests that orthodontic brackets could affect the trueness of intraoral scan images. Clinical relevance It is necessary for clinicians to consider the effect of brackets on digital impression when using IOS images in orthodontic patients.

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Digital Impression taking for Maxillary Full-Arch Restoration with Immediate Loading. A Case Report.

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-20-00117 ◽

2021 ◽

Author(s):

Jesús Peláez Rico ◽

Jorge Cortés-Bretón Brinkmann ◽

María Carrión Martín ◽

Mabel Albanchez González ◽

Celia Tobar Arribas ◽

...

Keyword(s):

Acrylic Resin ◽

Digital Impression ◽

Immediate Loading ◽

Clinical Report ◽

Intraoral Scanner ◽

Intraoral Scanning ◽

Digital Impressions ◽

Removable Prosthesis ◽

And Function

The aim of this clinical report is to describe a maxillary full-arch implant supported restoration with immediate loading performed by means of an entirely digital workflow with photogrammetric system and intraoral scanning. A female patient with an edentulous maxillary arch attended the dental clinic seeking a maxillary fixed restoration. After treatment planning, six implants were placed using a surgical splint fabricated digitally by intraoral scanning of her previous removable prosthesis. Multi-unit abutments were fitted and two digital impressions were taken, one with a photogrammetric system for determining implant positions, and the other with an intraoral scanner for soft tissue registration. The acrylic resin structure of the immediate prosthesis was milled and placed within 8 hours of implant surgery. This provisional structure fitted correctly and provided adequate esthetics and function. Radiographic and clinical follow-up after 24 months observed adequate implant evolution.

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