Cite this asCabral G, Soares LM, Riquieri H, Barbosa AB, Sartori R, et al. (2022) Miths and solutions in digital dental impression. J Dent Probl Solut 9(2): 025-027. DOI: 10.17352/2394-8418.000113
Copyright License© 2022 Cabral G, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Nowadays, the process of transferring intra-oral information from the dental office to dental laboratories has been a current reality in dentistry. The number of advantages presented in this process include work accuracy, patient acceptance, a transfer, and storage information facility, three-dimensional visualization, and an increase in time efficiency . Among the disadvantages observed are the learning curve  and the cost of acquisition and maintenance of the IOS (Intra-oral Scanner). However, the main challenge is not actually related to the methodology for acquiring the information, either using the digital or conventional methods, but the control of factors performed previously in the impression-taking procedure or the intra-oral scanning. This article explains these factors present in both methods that are fundamental to increase the potential to solve some frequent problems in the dental laboratory (Figure 1).
It is indisputable the number of benefits when using digital impression in dentistry, which has gained more popularity and acceptance in the daily routine as to be considered the method of choice for future generations in every dental specialty . When capturing the intra-oral information, the tools used for impressions with elastomers materials compared to light-optical acquisition represents a totally different domain in terms of the method to acquire this information. However, the intra-oral matter remains the same and yet the biological components (hard tissues - tooth and bone and soft tissues - gingiva, tongue, cheek, lips) play a role under equal principles.
Managing these important principles in dentistry haven’t changed throughout the years and should always be managed properly in order to guarantee the effectiveness of the information acquired [4-6].
The most common error is mainly due to human inaccuracy in the process of environment preparation  which leads to an inadequate impression or a deficient intra-oral scanning. Ninety percent of the problems that dental laboratories have faced are related either to poor teeth preparation or difficulties to visualize and identify the margins [2,7]. These problems are often present in both techniques, the conventional, using impression materials, and the digital impression.
“We are going from: not having problems with conventional impression to having problems with intra-oral scanning” (Figure 2).
Digital impressions eliminate some of the drawbacks of conventional elastomer impressions; however, proper soft-tissue management, the isolation of teeth preparation, and defined margins are still necessary .
The aim of this study review is to present the main factors that can prevent common errors of intra-oral optical scanning in the production of dental restoration when working with digital impression CAD-CAM technology.
We should understand that information acquisition is a process, not a solo step. It will depend on the quality of intra-oral hard and soft tissue. Also, it is necessary to determine that all the parameters are under control as well as the key steps be well managed by dentists to provide adequacy of the oral environment before the acquisition act:
There is nothing new in these fundamentals. By managing these period-restorative pillars, we simply prioritize the health of biological tissues protecting them and creating a proper foundation before moving forward to the final restoration.
1. Adequate tooth preparation design helps to establish a clear and evident margin, an ideal restorative material thickness, crown and bridge path of insertion as well as improving marginal adaptation [9,10,11] (Figure 3).
Once we manage all these previous steps, the two-cord technique seems to be a superior option because promotes an effective horizontal displacement. The dentist should be able to see the first cord in place while the light from the IOS device reads the preparation margins 360-degree (Figures 6,7).
During the last decade, we have been distracted mostly by doing comparisons between the advantages and the disadvantages of new technologies in indirect restorative dentistry, and, the points that have a major impact on the oral health care of our patients, have been missed.
The approach for data acquisition is a process and not a single act and it is paramount to change the clinicians’ mindset toward taking particular care and performing all crucial steps that are related to the biology behind dentistry helping to ensure the most predictable and satisfactory outcomes. As this article has demonstrated, these combined efforts diminish most part of the problems that dental laboratories have faced particularly regarding to inaccurate conventional and digital impressions.
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