Learning curve of intraoral scanning by prosthodontic residents

Hamad, Khaled Q. Al

doi:10.1016/j.prosdent.2019.04.003

Cited by 34 publications

(41 citation statements)

References 38 publications

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“…Here, relevant areas can be cleaned before scanning. In general, scanningduration should decrease as scanning strategy and experience improve [21].…”

Section: Discussionmentioning

confidence: 99%

Technical note on introducing a digital workflow for newborns with craniofacial anomalies based on intraoral scans - part I: 3D printed and milled palatal stimulation plate for trisomy 21

et al. 2020

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Background: Advanced digital workflows in orthodontics and dentistry often require a combination of different software solutions to create patient appliances, which may be a complex and time-consuming process. The main objective of this technical note is to discuss treatment of craniofacial anomalies using digital technologies. We present a fully digital, linear workflow for manufacturing palatal plates for infants with craniofacial anomalies based on intraoral scanning. Switching to intraoral scanning in infant care is advantageous as taking conventional impressions carries the risk of impression material aspiration and/or infections caused by material remaining in the oronasal cavity. Material and methods: The fully digital linear workflow presented in this technical note can be used to design and manufacture palatal plates for cleft palate patients as well as infants with functional disorders. We describe the workflow implemented in an infant with trisomy 21. The maxilla was registered using a digital scanner and a stimulation plate was created using dental CAD software and an individual impression tray module on a virtual model. Plates were manufactured using both additive and subtractive methods. Methacrylate based light curing resin and Poly-Ether-Ether-Ketone were the materials used. Results: The palatal area was successfully scanned to create a virtual model. The plates fitted well onto the palatal area. Manual post-processing was necessary to optimize a functional ridge along the vestibular fold and remove support structures from the additively manufactured plate as well as the milled plate produced from a blank. The additively manufactured plate fitted better than the milled one. Conclusion: Implementing a fully digital linear workflow into clinical routine for treatment of neonates and infants with craniofacial disorders is feasible. The software solution presented here is suitable for this purpose and does not require additional software for the design. This is the key advantage of this workflow, which makes digital treatment accessible to all clinicians who want to deal with digital technology. Whether additive or subtractive manufacturing is preferred depends on the appliance material of choice and influences the fit of the appliance.

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“…Here, relevant areas can be cleaned before scanning. In general, scanningduration should decrease as scanning strategy and experience improve [21].…”

Section: Discussionmentioning

confidence: 99%

Technical note on introducing a digital workflow for newborns with craniofacial anomalies based on intraoral scans - part I: 3D printed and milled palatal stimulation plate for trisomy 21

et al. 2020

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“…Another major factor that influences the time taken is the operator’s experience. A recent study by Al Hamad et al on the learning curve for use of intraoral scanners revealed that the scanning time and difficulty level decreased with repetitive use of the scanner. Single image systems like the Bluecam required longer learning time compared with the newer systems that produce continuous images .…”

Section: Discussionmentioning

confidence: 99%

Patient preference and operating time for digital versus conventional impressions: a network meta‐analysis

Sivaramakrishnan

Alsobaiei

Sridharan

2019

Australian Dental Journal

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Background Digital impression techniques have seen many advancements, with new hardware and software being developed each year. The technical advantages of these systems are real‐time visualization, evaluation and archive, segmental capture, ease of recapture if necessary, economical in terms of no use of impression material or trays or disinfection, easy file transfer and communication with the laboratory. However patient satisfaction is one major factor that might influence the choice of impression technique. The aim of this network meta‐analysis was to identify statistically the evidence on overall patient preferences relative to digital versus conventional impression techniques, in addition to the time taken in making these impressions. Methodology Randomized or prospective clinical studies were identified based on the inclusion criteria in PUBMED, DARE and COCHRANE databases; subsequently pertinent data were extracted. Risk of bias of the included studies was assessed using the Cochrane risk of bias tool and Newcastle‐Ottawa scale. Heterogeneity amongst the studies in direct comparison was assessed by Chi‐square and I2 tests using the Inverse variance heterogeneity model. Direct comparison estimates were derived by pooling the data from studies that compared the same intervention. Indirect comparison pooled estimates were derived by using the data amongst the studies, through a common comparator, using MetaXL software. Mean differences and Odds ratio at 95% confidence interval were used as the effect estimates, while inconsistencies were evaluated by H‐statistics. GRADE working group approach was used to assess the quality of available evidence. Results Fourteen studies were included. Results from 11 studies on 471 patients (236‐Digital; 235‐conventional) were pooled for patient preference with 95% confidence interval. The Forest plot showed a pooled estimate of 31.23 [5.95, 163.87], showing a statistically significant number of patients favouring digital impressions. Results from 11 studies reported the time taken in 589 patients (278‐digital; 311 conventional). The pooled estimate (2.72 [0.08, 5.32]) (95% confidence interval) showed a statistically significant increase in the time required to make digital impressions. The overall time taken in minutes for the interventions in the digital group in decreasing order were: LAVA Cos (8.14[3.64,12,26] (statistically significant); I tero (4.11[‐1.02,9.24]; CEREC (0.34[‐4.14,4.82]). Conclusion There was an overall preference for digital impressions, although the time required is longer. The factors related to the digital system, the operator and the patient were studied, with recommendations forming a basis for possible hardware and software upgrades of the digital systems that can produce significant improvement in the acceptance rate for both the patient and the clinician.

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“…The virtual casts of upper and lower arches were accepted if included accurate scans of all the surfaces of every teeth with 2-3 mm of gingiva margin and no crack lines were found. The quality of the scans was satisfactory if the software could attach the arches to each other based on bite registration scan (16). (Fig.…”

Section: Digital Impression Takingmentioning

confidence: 99%

“…longspan restoration on multiple implants) ( [13][14][15], di cult bite registration (many systems does not permit registration of dynamic occlusion), scanning fees in closed systems (the user has to pay for performing the scanning data), costs (intraoral scanning systems are still expensive) (2). Furthermore, these new methods have learning curve, dentists are required to spend time in learning to effectively use these devices (16). Learning is de ned as "an enduring change in behavior or in the capacity to behave in a given fashion resulting from practice or other forms of experience" (17).…”

Section: Introductionmentioning

confidence: 99%

Learning curve of digital intraoral scanning – an in vivo study

Róth

Czigola

Joós-Kovács

et al. 2020

Preprint

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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 intraoral scanning by prosthodontic residents

Cited by 34 publications

References 38 publications

Technical note on introducing a digital workflow for newborns with craniofacial anomalies based on intraoral scans - part I: 3D printed and milled palatal stimulation plate for trisomy 21

Technical note on introducing a digital workflow for newborns with craniofacial anomalies based on intraoral scans - part I: 3D printed and milled palatal stimulation plate for trisomy 21

Patient preference and operating time for digital versus conventional impressions: a network meta‐analysis

Learning curve of digital intraoral scanning – an in vivo study

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