Accuracy of face scan-based virtual facebow records: A comparison between two registration methods.

ABSTRACTThis article evaluates the design of a variable impedance prosthetic (VIPr) socket for a transtibial amputee using computer-aided design and manufacturing (CAD/CAM) processes. Compliant features are seamlessly integrated into a three-dimensional printed socket to achieve lower interface peak

Preoperative computer-aided design and computer-aided manufacturing (CAD/CAM) revolutionized head and neck reconstruction after extirpative surgery. However, studies performing head-to-head comparison to the conventional technique have limited long-term follow-up. The authors aimed to compare short and long-term outcomes between conventional and CAD/CAM approaches for mandibular reconstruction with free fibula flaps. Patients undergoing free flap reconstruction from 2012 to 2021 were included. Data regarding patient demographics, medical history, surgical details, complications, and reconstructive outcomes were collected. Patients who had CAD/CAM were compared with the patients who underwent reconstruction with the conventional technique. The cumulative incidence of hardware maintenance was displayed using the Kaplan-Meier method. A total of 215 patients (conventional, n = 79; CAD/CAM, n = 136) were included. Both cohorts had similar demographics, but the CAD/CAM cohort was younger ( P = 0.043). The mean operative duration was 54 minutes shorter with the use of CAD/CAM ( P = 0.014). Total and partial flap loss rates were similar. Patients with CAD/CAM had significantly lower rates of early wound dehiscence ( P = 0.037). Median (interquartile range [IQR]) follow-up duration was similar (931 days [IQR, 1854 days] in conventional versus 728 days [IQR, 841 days] days in CAD/CAM; P = 0.084). After excluding patients with major surgical complications in the first 30 days, the CAD/CAM cohort had a lower hardware removal rate (28.8% versus 13.9%; P = 0.011). The significance persisted after including only the patients with more than 2 years of follow-up. The use of preoperative CAD/CAM may reduce operative duration, while allowing for longer maintenance of hardware with reduced removal rates because of complications. Therapeutic, III.

Accuracy of guided dental implant surgery using a fully digital workflow: A case series

3D technologies for precision in orthodontics

Keys to achieving successful restoratively-driven implant placement with CAD/CAM surgical guide: A technical note

Numerous surgical fields have embraced computer-aided design and computer-aided manufacturing (CAD/CAM), including plastic and reconstructive surgery. However, most of the literature and clinical use pertains to reconstruction of the head and neck. Herein, we provide a case series and systematic review of the literature, documenting the use of CAD/CAM in facilitating complex microvascular free tissue transfer for reconstructions involving the extremities, pelvis, and spine (EPS). This study consisted of two components: a case series and a systematic review of the literature. For the case series, the senior author's cases that included CAD/CAM to assist microvascular free tissue transfer reconstructions of the EPS were included. For the systematic review, all PubMed-, Scopus-, and Google Scholar-indexed studies describing the use of CAD/CAM to facilitate free tissue transfer in the EPS were identified and included using PRSMA guidelines. The case series identified 10 patients who received CAD/CAM-assisted microvascular reconstruction. Our systematic review identified 15 articles, representing 124 patients and 133 CAD/CAM-assisted free tissue transfers. Most authors believed that CAD/CAM facilitated a more efficient operation by shifting much of the intraoperative planning to the preoperative phase, ultimately translating to a shorter and more accurate surgery with improved function and cosmesis. CAD/CAM can be used to facilitate microvascular reconstruction of the EPS. Our cases series and systematic review suggest that CAD/CAM for EPS surgery may improve outcomes.

Background: The objective of this study was to investigate the attitude of Saudi dentists towards CAD/CAM (computer-aided design and computer-aided manufacturing) in restorative dentistry, investigate the existing knowledge and improve the practice accordingly. Methods: At random, electronic surveys were distributed to Saudi dental practitioners. The study received 500 questionnaires, with 425 being deemed valid. The following sections were included in the questionnaire: (i) Practitioner demographic information such as gender, practice level, and practice experience; (ii) CAD/CAM knowledge and benefits; (iii) CAD/CAM skills and training required; and (iv) CAD/CAM clinical overview. Descriptive statistics such as numbers and percentages were used to analyze the collected data. The Chi-square and Fisher's Exact tests were used to assess the results. Results: Males accounted for 292 (68.7%) of the participants, while females accounted for 133 (31.3%). General Practitioners accounted for the most subjects (253, or 59.5%), followed by consultants (91, or 21.4%) and specialists (81, or 19.1%). Among 425 dentists, 170 (40%) were aware of CAD/CAM, while 255 (60%) were not. Consultants and specialists demonstrated more significant levels of knowledge than general practitioners. Furthermore, dentists with experience of more than ten years and experience of 5-10 years showed more understanding of CAD/CAM than dentists with less than five years of experience. Most participants (71.5%) do not use CAD/CAM in dental practice, whereas only less than one-third of them use it. Most participants (63.5%) plan to purchase CAD/CAM. Most dentists (74.4%) believe CAD/CAM technology is helpful in clinical procedures, while others believe it is useful in diagnostic and different functions. Most participants assume that CAD/CAM will eventually replace traditional methods. Most dentists assume that the use of CAD/CAM requires skills and training. Conclusion: The findings of this study show a prominent level of satisfaction and a favorable attitude among the surveyed dentists towards the usage of CAD/CAM technology in clinical practice.

Background:The objective of this study was to investigate the attitude of Saudi dentists towards CAD/CAM (computer-aided design and computer-aided manufacturing) in restorative dentistry, investigate the existing knowledge and improve the practice accordingly.Methods:At random, electronic surveys were distributed to Saudi dental practitioners. The study received 500 questionnaires, with 425 being deemed valid. The following sections were included in the questionnaire: (i) Practitioner demographic information such as gender, practice level, and practice experience; (ii) CAD/CAM knowledge and benefits; (iii) CAD/CAM skills and training required; and (iv) CAD/CAM clinical overview. Descriptive statistics such as numbers and percentages were used to analyze the collected data. The Chi-square and Fisher's Exact tests were used to assess the results.Results:Males accounted for 292 (68.7%) of the participants, while females accounted for 133 (31.3%). General Practitioners accounted for the most subjects (253, or 59.5%), followed by consultants (91, or 21.4%) and specialists (81, or 19.1%). Among 425 dentists, 170 (40%) were aware of CAD/CAM, while 255 (60%) were not. Consultants and specialists demonstrated more significant levels of knowledge than general practitioners.Furthermore, dentists with experience of more than ten years and experience of 5-10 years showed more understanding of CAD/CAM than dentists with less than five years of experience. Most participants (71.5%) do not use CAD/CAM in dental practice, whereas only less than one-third of them use it. Most participants (63.5%) plan to purchase CAD/CAM. Most dentists (74.4%) believe CAD/CAM technology is helpful in clinical procedures, while others believe it is useful in diagnostic and different functions. Most participants assume that CAD/CAM will eventually replace traditional methods. Most dentists assume that the use of CAD/CAM requires skills and training.Conclusion:The findings of this study show a prominent level of satisfaction and a favorable attitude among the surveyed dentists towards the usage of CAD/CAM technology in clinical practice.

CAD-CAM in dentistry

A fully digital approach to autonomous robot-assisted immediate implant and interim restoration placement in the maxillary anterior esthetic zone: A case series.

Two-body wear rate of CAD/CAM resin blocks and their enamel antagonists

Computer-aided design and computer-aided manufacturing (CAD/CAM) technology is an innovative digital system capable of scanning prepared teeth that are intended to receive crowns, bridges, and inlays and then effectively designing and fabricating restorations. Many dental schools are currently implementing this innovative CAD/CAM technology as part of their curricula and at University of Florida College of Dentistry we created a hands-on elective. The 5-week course requires 2- to 3-hours of time per week for the lectures and labs. The sessions cover an introduction to digital dentistry, technology and systems evaluation, an exercise for scanning, designing, milling, and finishing a single unit ceramic restoration, and a final exam. The students also gave presentations about systems and materials used. The classroom exercises included small-group learning and class debate sessions. In 2015, two 5-week sessions included a total of 16 participants (8 each). The overall course satisfaction from the combined two rounds was 4.7 out of 5. Comments for the course have been generally positive, indicating that the course was a successful introduction to CAD/CAM technology. Students' comments showed that they were very impressed by the new technology and interested in implementing it in their practices. This exercise in the comparison between CAD/CAM and conventional technology resulted in a deeper understanding of digital dentistry systems and ensured that students were prepared in their clinical reasoning to apply their education in real-world decision making after graduation. By integrating this new technology in a core curriculum, preclinical, prosthodontic sophomore course and as a junior elective course, students were provided with the hands-on experience needed to utilize CAD/CAM effectively in patient care.

Clinical outcomes of three different crown systems with CAD/CAM technology

Effectiveness and efficiency of a CAD/CAM orthodontic bracket system

Computer-aided design and computer-aided manufacturing (CAD/CAM) denture base manufacturers claim to produce their resin pucks under high heat and pressure. Therefore, CAD/CAM dentures are assumed to have enhanced mechanical properties and, as a result, are often produced with lower denture base thicknesses than conventional, manually fabricated dentures. The aim of this study was to investigate if commercially available CAD/CAM denture base resins have more favourable mechanical properties than conventionally processed denture base resins. For this purpose, a series of three-point bending tests conforming to ISO specifications were performed on a total of 80 standardised, rectangular CAD/CAM denture base resin specimens from five different manufacturers (AvaDent, Baltic Denture System, Vita VIONIC, Whole You Nexteeth, and Wieland Digital Dentures). A heat-polymerising resin and an autopolymerising resin served as the control groups. The breaking load, fracture toughness, and the elastic modulus were assessed. Additionally, the fracture surface roughness and texture were investigated. Only one CAD/CAM resin showed a significantly increased breaking load. Two CAD/CAM resins had a significantly higher fracture toughness than the control groups, and all CAD/CAM resins had higher elastic moduli than the controls. Our results indicate that CAD/CAM denture base resins do not generally have better mechanical properties than manually processed resins. Therefore, the lower minimum denture base thicknesses should be regarded with some caution.