Fit of CAD/CAM Tooth-supported Single Crowns and Fixed Dental Prostheses

Anadioti, Evanthia; Lee, Catherine; Schweitzer, Alexa

doi:10.1007/s40496-017-0139-x

Cited by 8 publications

(4 citation statements)

References 60 publications

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“…Sobre as restaurações feitas em laboratório, os sistemas de CAD/CAM são compostos por três partes principais: 1) um escâner para coletar os dados da região das estruturas de interesse, em seguida, converter em impressões virtuais; 2) software para planejar as restaurações virtualmente e configurar todos os parâmetros de fresamento; 3) o dispositivo de processamento ou uma máquina de fresagem computadorizada para fabricar a restauração a partir de blocos sólidos do material restaurador escolhido 5 . As primeiras duas partes da moldagem digital representam a fase CAD, enquanto a terceira é responsável pela fase CAM 17 . Os sistemas CAD/CAM podem ser classificados como para uso em consultório ou laboratório 14 .…”

Section: Revisão Discutidaunclassified

Moldagem Digital Em Prótese Dentária Digital Impressions in Prosthodontics

Troesch¹,

Mello²,

Carvalho³

et al. 2021

RFO

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O ato de moldar é uma prática comum nos consultórios, no entanto, como avanço na área odontológica e na busca pela modernização para promoverconforto ao paciente e agilidade nos tratamentos, surgiram no iníciodos anos 80, os modelos digitais. Com os avanços tecnológicos, osprocessos de moldagem e obtenção de modelo digital, como também,a produção da peça protética, são feitos por meio do sistema CAD/CAM(Computer Aided Design/ Computer Aided Manufacturing) otimizandoa qualidade e tempo das reabilitações orais. Assim, o objetivo desse trabalhofoi apresentar uma revisão de literatura sobre a moldagem digitalem prótese dentária, suas indicações, vantagens, desvantagens e principaissistemas digitais disponíveis. Foi realizada uma busca nos periódicosda CAPES, Pubmed e Bireme com as palavras-chaves “Prótese Dentária”,“Desenho Assistido Por Computador” e “Restauração Dentária Permanente”e utilizados artigos no período de 2005 a 2020. A moldagem digitalfornece resultados similares às técnicas de impressão convencionaise atende aos requisitos de precisão para o processo de transferência deinformações da boca do paciente para o laboratório de prótese dentária.Além disso, o conforto do paciente e a agilidade no tratamento sãoaspectos positivos que agregam valor à essa tecnologia. Existem muitossistemas digitais disponíveis atualmente na área odontológica, cabe aocirurgião-dentista e ao laboratório de prótese escolher qual se adequamelhor à sua rotina.The act of impression is a common practice in dentistry, however, withthe advances in the dental field and the search for modernization in orderto promote patient comfort and agility in treatments, digital modelsemerged in the early 1980s. With technological advances, the processes of impression and obtaining a digital model, as well as the fabrication ofprosthetic parts, are performed by CAD / CAM system, optimizing thequality and time of oral rehabilitations. Thus, the aim of this study wasto present a literature review on digital impression in dental prosthesis,its indications, advantages, disadvantages and main available digital systems.A search was conducted in CAPES, Pubmed and Bireme journalswith the keywords “Dental Prosthesis”, “Computer Assisted Design” and“Permanent Dental Restoration” and the period for the studies used wasfrom 2005 to 2020. Digital impressions provides similar results to conventionaltechniques and meets the precision requirements for the process oftransferring information from the patient’s mouth to the dental laboratory.In addition, patient comfort and agility in treatment are positive aspectsthat add value to this technology. There are many digital systems currentlyavailable in the dental field, it is up to the dentist and the prosthesis laboratoryto choose which one best suits your routine.

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Section: Revisão Discutidaunclassified

Moldagem Digital Em Prótese Dentária Digital Impressions in Prosthodontics

Troesch¹,

Mello²,

Carvalho³

et al. 2021

RFO

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“…At present, digital scanning technology is in common use both for teeth and implants. There are many advantages associated with intra-oral digital impressions, including: reduced distortion from impression materials and plasters, less chair time, acquisition of digital file, improved patient comfort and the ability to take passive impressions [1][2][3][4]. There are two possible methods for taking a digital impression: indirect (laboratory scanner), where the lab scans either the impression or the model, or direct (intra-oral scanner) using chair-side scanning [5].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Laboratory Scanner Versus Intra-Oral Scanner on Determining the Implant Axis by Using Three Different Scan Abutments

et al. 2021

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Background: The purpose of this in vitro study was to compare the implant axis’ spatial position and orientation by using laboratory scanner versus intra-oral scanner with three different scan abutments. Methods: A 3D model was printed with an internal hex implant analog in the place of teeth 35#. Three standard scan abutments were used: MIS (two-piece titanium), AB (two-piece PEEK and titanium base) and ZZ (one-piece PEEK). Each scan abutment was scanned 30 times by TRIOS E3 (laboratory scanner) and 30 times by Omnicam (intra-oral scanner). For each scan, an STL (stereolithography) file was created, and the spatial characterization of each scan abutment was measured in the X, Y, Z coordinates, and rotational and longitudinal angles. The comparison between all the scans was conducted by superimposition of the STL files, using a 3D software. A t-test and Wilcoxon signed-rank test were used. (p < 0.05) Results: Only the MIS scan abutment showed no statistical difference in the X and Z axes. (p < 0.05). All other scan abutments showed a statistical difference in all axes. The rotational angle of the AB scan abutment was twice the angle of the MIS and ZZ scan abutments. Conclusions: All three scan abutments showed a rotational deviation of the implant axis between the laboratory scanner and the intra-oral scanner. The AB scan abutment showed the greatest deviation (1.04 degrees) while the other two abutments showed deviations of about half a degree in relation to the laboratory scan abutment. There is a need for further studies which will examine the influence of geometry, material, and scan abutment parts on the accuracy of the scan obtained.

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“…From one side, milling employs subtractive methods in which material is removed from an initial block or disk to produce a desired shape. This computer‐aided design and computer‐aided manufacturing (CAD‐CAM) technology has been widely implemented with an abundance of studies demonstrating accuracy and efficiency compared to analogue prosthesis fabrication techniques 2–5 . However, milling produces significant material waste.…”

mentioning

confidence: 99%

“…This computeraided design and computer-aided manufacturing (CAD-CAM) technology has been widely implemented with an abundance of studies demonstrating accuracy and efficiency compared to analogue prosthesis fabrication techniques. [2][3][4][5] However, milling produces significant material waste. Also, depending on the number of axes or the diameter of burs the milling machine is equipped with, there are limitations in respect to complex designs or sharp line angles.…”

mentioning

confidence: 99%

Accuracy of Dental and Industrial 3D Printers

Anadioti

Kane

Bergler

et al. 2022

Journal of Prosthodontics

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Purpose: This in vitro study evaluated the dimensional accuracy of three 3D printers and one milling machine with their respective polymeric materials using a simplified geometrical model. Materials and methods:A simplified computer-aided design (CAD) model was created. The test samples were fabricated with three 3D printers: a dental desktop stereolithography (SLA) printer, an industrial SLA printer, and an industrial fused deposition modeling (FDM) printer, as well as a 5-axis milling machine. One polymer material was used per industrial printer and milling machine while two materials were used with the dental printer for a total of five study groups. Test specimens were then digitized using a laboratory scanner. The virtual outer caliper method was used to measure the linear dimensions of the digitized 3D printed and milled specimens in x-, y-, and z-axes, and compare them to the known values of the CAD model. Data were analyzed with Kruskal-Wallis one-way ANOVA on Ranks followed by the Tukey's test. Results: Milled specimens were not significantly different from the CAD model in any dimension (p > 0.05). All 3D printed specimens were significantly different from the CAD model in all dimensions (p = 0.01), except the dental SLA 3D printer with one of the polymers tested (Bis-GMA) which was not significantly different in two (x and z) dimensions (p = 0.4 and p = 0.12). Conclusions: The milling technology tested provided greater dimensional accuracy than the selected 3D printing. Printer, printing technology, and material selection affected the accuracy of the printed model.

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Fit of CAD/CAM Tooth-supported Single Crowns and Fixed Dental Prostheses

Cited by 8 publications

References 60 publications

Moldagem Digital Em Prótese Dentária Digital Impressions in Prosthodontics

Moldagem Digital Em Prótese Dentária Digital Impressions in Prosthodontics

The Influence of Laboratory Scanner Versus Intra-Oral Scanner on Determining the Implant Axis by Using Three Different Scan Abutments

Accuracy of Dental and Industrial 3D Printers

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