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https://www.readbyqxmd.com/read/28338024/evidence-for-use-of-intraoral-scanners-under-clinical-conditions-for-obtaining-full-arch-digital-impressions-is-insufficient
#1
Hadil Khraishi, Brett Duane
Data sourcesPubMed, Scopus, Cochrane Library, Web of Science, Embase. Relevant papers were also searched from the reference lists of selected studies. A web search of current manufacturers of intraoral scanners.Study selectionStudies with full-arch digital impressions recorded intraorally that tested any of the following outcomes; validity, repeatability, reproducibility, time efficiency. Patient acceptance of digital impressions were considered for the review.Data extraction and synthesisInitially, only titles of the papers identified from the databases were screened, then further screening of the abstracts of the selected titles was carried out...
March 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28333394/socket-shield-technique-for-immediate-implant-placement-clinical-radiographic-and-volumetric-data-after-5%C3%A2-years
#2
Daniel Bäumer, Otto Zuhr, Stephan Rebele, Markus Hürzeler
OBJECTIVES: Implant placement immediately after tooth extraction is often accompanied by resorption of surrounding tissues. A clinical technique was developed where the buccal portion of the root is retained to preserve the periodontal ligament and bundle bone. This technique is based on animal studies showing the potential to preserve the facial tissues utilizing this approach. The purpose of this study was to gain more insight regarding the safety of the technique with regard to biological and implant-related long-term complications and to observe the clinical appearance of the peri-implant tissues...
March 23, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28326723/-current-dental-implant-design-and-its-clinical-importance
#3
Lin Ye
The development of clinical implant dentistry was intensively affected by dental implant design improvement and innovation, which brought about new concept, even milestone-like changes of clinical protocol. The current improvements of dental implant design and their clinical importance could be highlighted as followings: 1) The implant apical design influences the implant preliminary stability in immediate implant. The apical 3-5 mm design of implant makes implant stable in immediate implant, because this part would be screwed into alveolar bone through fresh socket, the other part of implant could not be tightly screwed in the socket because of smaller implant diameter...
February 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28316122/digital-workflow-for-fixed-implant-rehabilitation-of-an-extremely-atrophic-edentulous-mandible-in-three-appointments
#4
Panos Papaspyridakos, Neha Rajput, Yukio Kudara, Hans-Peter Weber
OBJECTIVE: To present a rationale to reduce treatment complexity, number of surgeries, and overall treatment time for patients with extreme mandibular ridge deficiency. CLINICAL CONSIDERATIONS: A 67-year-old fully edentulous male presented with a chief complaint of poor retention and stability of the mandibular complete denture with consequent discomfort and inability to chew. A novel 3-appointment protocol from guided implant placement to definitive prosthesis delivery was implemented...
March 18, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28303094/child-robot-interactions-for-second-language-tutoring-to-preschool-children
#5
Paul Vogt, Mirjam de Haas, Chiara de Jong, Peta Baxter, Emiel Krahmer
In this digital age social robots will increasingly be used for educational purposes, such as second language tutoring. In this perspective article, we propose a number of design features to develop a child-friendly social robot that can effectively support children in second language learning, and we discuss some technical challenges for developing these. The features we propose include choices to develop the robot such that it can act as a peer to motivate the child during second language learning and build trust at the same time, while still being more knowledgeable than the child and scaffolding that knowledge in adult-like manner...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28294354/a-prospective-study-assessing-the-effect-of-coronal-tooth-structure-loss-on-the-outcome-of-root-canal-retreatment
#6
N Al-Nuaimi, S Patel, R S Austin, F Mannocci
AIM: To evaluate the outcome of secondary root canal treatment (retreatment) on posterior teeth in relation to the residual volume of coronal tooth structure, measured with an intraoral scanner, using periapical radiography and cone beam computed tomography (CBCT). METHODOLOGY: A total of 137 posterior teeth in 121 patients were assessed clinically and radiographically using periapical radiographs and CBCT scans at baseline and 1-year after root canal retreatment...
March 10, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28294188/efficient-digitalization-method-for-dental-restorations-using-micro-ct-data
#7
Changhwan Kim, Seung Hoon Baek, Taewon Lee, Jonggun Go, Sun Young Kim, Seungryong Cho
The objective of this study was to demonstrate the feasibility of using micro-CT scan of dental impressions for fabricating dental restorations and to compare the dimensional accuracy of dental models generated from various methods. The key idea of the proposed protocol is that dental impression of patients can be accurately digitized by micro-CT scan and that one can make digital cast model from micro-CT data directly. As air regions of the micro-CT scan data of dental impression are equivalent to the real teeth and surrounding structures, one can segment the air regions and fabricate digital cast model in the STL format out of them...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28275280/intracanal-adaptation-of-a-fiber-reinforced-post-system-as-compared-to-a-cast-post-and-core
#8
Nor Aidaniza Abdul Muttlib, Aimi Najwa Pahrol Azman, Yee Tong Seng, Rabihah Alawi, Zaihan Ariffin
BACKGROUND: The purpose of this study was to compare the adaptation of fiber reinforced composite post system and cast post-and-core. METHODS: 17 extracted human permanent maxillary central incisors were endodontically treated following the standard protocol. 17 fiber reinforced composite post had been fabricated and adapted to the prepared parallel root canals. A light body poly vinyl siloxane (EXAMIX NDS, Japan) impression material was inserted into the root canals followed by the post...
December 2016: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/28274480/use-of-intraoral-scanning-and-3-dimensional-printing-in-the-fabrication-of-a-removable-partial-denture-for-a-patient-with-limited-mouth-opening
#9
Jiang Wu, Yan Li, Yumei Zhang
BACKGROUND AND OVERVIEW: When treating patients with severely limited mouth openings, it is difficult for the dentist to obtain an impression and fabricate a removable partial denture (RPD) by using traditional methods. Intraoral scanning, computer-aided design, and 3-dimensional (3D) printing have provided alternative methods for fabricating dental prostheses. CASE DESCRIPTION: The authors present a case in which they aimed to improve the efficiency and quality of fabricating an RPD framework by integrating the technologies of intraoral scanning, computer-aided design, and 3D printing...
March 5, 2017: Journal of the American Dental Association
https://www.readbyqxmd.com/read/28274045/an-assessment-of-curve-of-spee-in-healthy-human-permanent-dentitions-a-cross-sectional-analytical-study-in-a-group-of-young-indian-population
#10
Sushma Krishnamurthy, Rajendra B Hallikerimath, Praveenkumar S Mandroli
INTRODUCTION: An awareness of the standard value of the maxillary and the mandibular curves of Spee may aid the clinician in developing occlusion in the sagittal plane and would be useful when providing prosthetic rehabilitation for patients with occlusal derangement. AIM: To assess and compare the radius and depth of curve of Spee in maxillary and mandibular arches in men and women, in a group of young Indian population. MATERIALS AND METHODS: The study cohort consisted of 25 men and 25 women between 19 to 24 years...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28273692/the-extent-and-scope-of-prosthodontic-practice-in-iowa
#11
Ronald L Ettinger, Zachary S Goettsche, Fang Qian
PURPOSE: The purpose of this questionnaire was to ask general dentists in private practice in the state of Iowa about the extent and scope of their prosthodontic practice. MATERIALS AND METHODS: A 22-item questionnaire was developed and tested on 5 general dentists. The Iowa Dental Association agreed to electronically distribute the survey to all general practice dentists in their database. After three rounds, a total of 289 responses were received from the 996 general dentists in the database...
March 8, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28267823/feasibility-and-accuracy-of-digitizing-edentulous-maxillectomy-defects-a-comparative-study
#12
Mahmoud E Elbashti, Mariko Hattori, Sebastian Bm Patzelt, Dirk Schulze, Yuka I Sumita, Hisashi Taniguchi
PURPOSE: The aim of this study was to evaluate the feasibility and accuracy of using an intraoral scanner to digitize edentulous maxillectomy defects. MATERIALS AND METHODS: A total of 20 maxillectomy models with two defect types were digitized using cone beam computed tomography. Conventional and digital impressions were made using silicone impression material and a laboratory optical scanner as well as a chairside intraoral scanner. The 3D datasets were analyzed using 3D evaluation software...
March 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28267815/digital-design-and-fabrication-of-surgical-obturators-based-only-on-preoperative-computed-tomography-data
#13
Jeff Rodney, Ivan Chicchon
This article describes the digital fabrication of a surgical obturator (SO) using only computed tomography (CT) data from the tumor area. This procedure is a departure from the traditional method of making an impression and obtaining a patient cast prior to surgery to allow for SO fabrication. The present approach allows for a virtual resection based on the patient's CT image; the SO is digitally designed with animation software and fabricated by 3D printing. The SO is relined with a denture reliner at the time of surgery to complete the obturation of the maxillectomy defect...
March 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28264077/association-of-a-community-campaign-for-better-beverage-choices-with-beverage-purchases-from-supermarkets
#14
Marlene B Schwartz, Glenn E Schneider, Yoon-Young Choi, Xun Li, Jennifer Harris, Tatiana Andreyeva, Maia Hyary, Nicolette Highsmith Vernick, Lawrence J Appel
Importance: Data are needed to evaluate community interventions to reduce consumption of sugary drinks. Supermarket sales data can be used for this purpose. Objective: To compare beverage sales in Howard County, Maryland (HC), with sales in comparison stores in a contiguous state before and during a 3-year campaign to reduce consumption of sugary beverages. Design, Setting, and Partipicants: This observational experiment with a control group included 15 HC supermarkets and 17 comparison supermarkets...
March 6, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28243386/comparison-of-the-fit-of-cast-gold-crowns-fabricated-from-the-digital-and-the-conventional-impression-techniques
#15
Mi-Jung Yun, Young-Chan Jeon, Chang-Mo Jeong, Jung-Bo Huh
PURPOSE: The purpose of this study was to compare the fit of cast gold crowns fabricated from the conventional and the digital impression technique. MATERIALS AND METHODS: Artificial tooth in a master model and abutment teeth in ten patients were restored with cast gold crowns fabricated from the digital and the conventional impression technique. The forty silicone replicas were cut in three sections; each section was evaluated in nine points. The measurement was carried out by using a measuring microscope and I-Soultion...
February 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28231346/in-vitro-three-dimensional-accuracy-of-digital-implant-impressions-the-effect-of-implant-angulation
#16
Vanessa A Chia, Roxanna J Esguerra, Khim Hean Teoh, Juin Wei Teo, Keng Mun Wong, Keson B Tan
PURPOSE: To compare the three-dimensional (3D) accuracy of conventional impressions (CIs) with digital scans (DSs) using an intraoral scanner (IOS) with intraoral scan bodies (SBs) and varying buccolingual interimplant angulations. A secondary aim was to measure the SB machining tolerance and height with and without application of torque. MATERIALS AND METHODS: Three master models (MMs) with two implants simulating an implant-supported three-unit fixed partial denture for bone-level implants were used...
March 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28222879/evaluation-of-die-trim-morphology-made-by-cad-cam%C3%A2-technology
#17
Pratiksha Agrawal, Geoffrey Thompson, Seok-Hwan Cho, Gerald J Ziebert
STATEMENT OF PROBLEM: The die contour can affect the emergence profile of prosthetic restorations. However, little information is available regarding the congruency between a stereolithographic (SLA) die and its corresponding natural tooth. PURPOSE: The purpose of this vitro study was to evaluate the shapes of SLA die in comparison with the subgingival contour of a prepared tooth to be restored with a ceramic crown. MATERIAL AND METHODS: Twenty extracted human teeth, 10 incisors, and 10 molars, were disinfected and mounted in a typodont model...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222873/influence-of-abutment-tooth-geometry-on-the-accuracy-of%C3%A2-conventional-and-digital-methods-of-obtaining-dental%C3%A2-impressions
#18
Jeison B Carbajal Mejía, Kazumichi Wakabayashi, Takashi Nakamura, Hirofumi Yatani
STATEMENT OF PROBLEM: Direct (intraoral) and indirect (desktop) digital scanning can record abutment tooth preparations despite their geometry. However, little peer-reviewed information is available regarding the influence of abutment tooth geometry on the accuracy of digital methods of obtaining dental impressions. PURPOSE: The purpose of this in vitro study was to evaluate the influence of abutment tooth geometry on the accuracy of conventional and digital methods of obtaining dental impressions in terms of trueness and precision...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222872/clinical-marginal-fit-of-zirconia-crowns-and-patients-preferences-for-impression-techniques-using-intraoral-digital-scanner-versus-polyvinyl-siloxane-material
#19
Nawapat Sakornwimon, Chalermpol Leevailoj
STATEMENT OF PROBLEM: The use of digital intraoral scanners is increasing; however, evidence of its precision in making crown impressions clinically remains scarce. Patients should also feel more comfortable with digital impressions, but only a few studies evaluating this subject have been performed. PURPOSE: The purpose of this clinical study was to evaluate the marginal fit of monolithic zirconia crowns and patients' preferences for digital impressions versus polyvinyl siloxane (PVS) impressions...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222869/accuracy-evaluation-of-intraoral-optical-impressions-a-clinical-study-using-a-reference-appliance
#20
Mohammad A Atieh, André V Ritter, Ching-Chang Ko, Ibrahim Duqum
STATEMENT OF PROBLEM: Trueness and precision are used to evaluate the accuracy of intraoral optical impressions. Although the in vivo precision of intraoral optical impressions has been reported, in vivo trueness has not been evaluated because of limitations in the available protocols. PURPOSE: The purpose of this clinical study was to compare the accuracy (trueness and precision) of optical and conventional impressions by using a novel study design. MATERIAL AND METHODS: Five study participants consented and were enrolled...
February 17, 2017: Journal of Prosthetic Dentistry
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