Intraoral Scanning Systems: Need for Maintenance

Background: with the emergence of technological innovations in the dental industry, one emerging trend has been the intraoral digitizing of patients by using intraoral scanning systems. Compared to taking conventional impressions, the use of intraoral scanners (IOS) is suitable for capturing direct optical impressions, helping to improve diagnostic efficacy, save time, reduce patient discomfort, and simplify clinical procedures. Intraoral scanning systems appear to have a high potential for providing guidance on proper standards of care. However, one main disadvantage is breathing and saliva secretion, which causes deviations, interfering with the applicability and accuracy of the optical impression. The aim of this study was to compare the validity and accuracy of three commercially available intraoral scanners, performing an analysis exploiting a wet model. Methods: an in vitro experimental study of four permanent teeth (two molars and two premolars) on the accuracy of copings obtained by subgingival preparations was performed, using an oral wet environment model. Two hundred and forty digital impressions were produced from three digital scanners using four samples. Descriptive analysis was performed using mean, standard deviation, and median. ANOVA and F-tests were performed to assess the amount of variability between the groups. For statistical analysis a 95% significance level was chosen. Results: all differences between groups were statistically significant. Conclusions: the present data implicate a huge impact of the oral biological fluids on the accuracy of digital impression to corresponding images, implying a failure of accurate impression under wetness conditions.

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Accuracy of Buccal Scan Procedures for the Registration of Habitual Intercuspation

Operative Dentistry ◽

10.2341/17-272-c ◽

2018 ◽

Vol 43 (6) ◽

pp. 573-580 ◽

Cited By ~ 2

Author(s):

M Zimmermann ◽

A Ender ◽

T Attin ◽

A Mehl

Keyword(s):

Statistical Analysis ◽

Analysis Software ◽

Scheffe Test ◽

Intraoral Scanning ◽

Significant Difference ◽

Mandibular Teeth ◽

Post Hoc ◽

Relationship Of ◽

Scanning Systems

SUMMARY Clinical Relevance: Accurate reproduction of the jaw relationship is important in many fields of dentistry. Maximum intercuspation can be registered with digital buccal scan procedures implemented in the workflow of many intraoral scanning systems. Objective: The aim of this study was to investigate the accuracy of buccal scan procedures with intraoral scanning devices for the registration of habitual intercuspation in vivo. The hypothesis was that there is no statistically significant difference for buccal scan procedures compared to registration methods with poured model casts. Methods and Materials: Ten individuals (full dentition, no dental rehabilitations) were subjects for five different habitual intercuspation registration methods: (CI) poured model casts, manual hand registration, buccal scan with inEOS X5; (BC) intraoral scan, buccal scan with CEREC Bluecam; (OC4.2) intraoral scan, buccal scan with CEREC Omnicam software version 4.2; (OC4.5β) intraoral scan, buccal scan with CEREC Omnicam version 4.5β; and (TR) intraoral scan, buccal scan with Trios 3. Buccal scan was repeated three times. Analysis of rotation (Rot) and translation (Trans) parameters was performed with difference analysis software (OraCheck). Statistical analysis was performed with one-way analysis of variance and the post hoc Scheffé test (p<0.05). Results: Statistical analysis showed no significant (p>0.05) differences in terms of translation between groups CI_Trans (98.74±112.01 μm), BC_Trans (84.12±64.95 μm), OC4.2_Trans (60.70±35.08 μm), OC4.5β_Trans (68.36±36.67 μm), and TR_Trans (66.60±64.39 μm). For rotation, there were no significant differences (p>0.05) for groups CI_Rot (0.23±0.25°), BC_Rot (0.73±0.52°), OC4.2_Rot (0.45±0.31°), OC4.5β_Rot (0.50±0.36°), and TR_Rot (0.47±0.65°). Conclusions: Intraoral scanning devices allow the reproduction of the static relationship of the maxillary and mandibular teeth with the same accuracy as registration methods with poured model casts.

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Local accuracy of actual intraoral scanning systems for single-tooth preparations in vitro

The Journal of the American Dental Association ◽

10.1016/j.adaj.2019.10.022 ◽

2020 ◽

Vol 151 (2) ◽

pp. 127-135 ◽

Cited By ~ 6

Author(s):

Moritz Zimmermann ◽

Andreas Ender ◽

Albert Mehl

Keyword(s):

Intraoral Scanning ◽

Local Accuracy ◽

Single Tooth ◽

Scanning Systems

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Comparison of an indirect impression scanning system and two direct intraoral scanning systems in vivo

Clinical Oral Investigations ◽

10.1007/s00784-018-2679-4 ◽

2018 ◽

Vol 23 (5) ◽

pp. 2421-2427 ◽

Cited By ~ 9

Author(s):

Patricia Bosniac ◽

Peter Rehmann ◽

Bernd Wöstmann

Keyword(s):

Scanning System ◽

Intraoral Scanning ◽

Scanning Systems

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Multivariate Assessment of Marginal Fit of Three Types of Dental Crowns Using Three Scanning Systems for CAD-CAM Technology - in vitro Pilot Study

Materiale Plastice ◽

10.37358/mp.18.3.5033 ◽

2018 ◽

Vol 55 (3) ◽

pp. 376-379

Author(s):

Smaranda Buduru ◽

Anca Mesaros ◽

Cristian Culcitchi ◽

Marioara Moldovan ◽

Doina Prodan ◽

...

Keyword(s):

In Vitro Study ◽

Marginal Fit ◽

Dental Crowns ◽

Intraoral Scanning ◽

Different Types ◽

Cad Cam ◽

Scanning Systems ◽

Conventional Impression ◽

Hybrid Ceramic

The objective of this in-vitro study was to compare if there are any differences in the marginal fit of crowns fabricated by CAD/CAM technique. We used three different types of materials (two types of polymethylmetacrylate (PMMA) provided by two different manufacturers and one type of hybrid ceramic) and three different types of impressions: intraoral scanning, model scanning and conventional impression scanning. The crowns were subsequently measured with an electronic microscope at 1000X. Our results showed better results for the hybrid ceramic. The differences between the PMMA were not significant. There were no statistic differences with the ANOVA analysis between the scanning methods. Best combination in terms of marginal fit was found with hybrid ceramic and intraoral scanning.

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INTRAORAL SCANNING SYSTEMS - A CURRENT OVERVIEW

International Journal of Advanced Research ◽

10.21474/ijar01/11956 ◽

2020 ◽

Vol 8 (10) ◽

pp. 1214-1223

Author(s):

Sheela Kannan ◽

◽

Chalakuzhiyil Abraham Mathew ◽

Roseline Savarimuthu Paulraj ◽

◽

...

Keyword(s):

Review Article ◽

Routine Procedure ◽

Clinical Recommendations ◽

Technology Generation ◽

Intraoral Scanning ◽

Digital Impressions ◽

Near Future ◽

Scanning Systems ◽

Conventional Impression ◽

A Current

Intraoral scanners (IOSs) are devices used for capturing direct optical impressions in dentistry. IOS eliminates the errors that are encountered with the conventional impression making procedures. The last decade has seen an increasing number of optical IOS devices, and these are based on different technologies. The objective of this review article is to discuss intraoral scanners with regards to its technology, generation systems, scanning paths, necessity of a powdering medium, accuracy (Trueness and precision), intermaxillary relationship registration, commercially available IOS, clinical recommendations, advantages, disadvantages, indications and contraindications. Digital impressions with IOS is likely going to be a routine procedure in dentistry in the near future.

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