Showing papers on "Dental laboratory published in 2016"

The Prosthetic Workflow in the Digital Era.

Abstract: The purpose of this retrospective study was to clinically evaluate the benefits of adopting a full digital workflow for the implementation of fixed prosthetic restorations on natural teeth. To evaluate the effectiveness of these protocols, treatment plans were drawn up for 15 patients requiring rehabilitation of one or more natural teeth. All the dental impressions were taken using a Planmeca PlanScan® (Planmeca OY, Helsinki, Finland) intraoral scanner, which provided digital casts on which the restorations were digitally designed using Exocad® (Exocad GmbH, Germany, 2010) software and fabricated by CAM processing on 5-axis milling machines. A total of 28 single crowns were made from monolithic zirconia, 12 vestibular veneers from lithium disilicate, and 4 three-quarter vestibular veneers with palatal extension. While the restorations were applied, the authors could clinically appreciate the excellent match between the digitally produced prosthetic design and the cemented prostheses, which never required any occlusal or proximal adjustment. Out of all the restorations applied, only one exhibited premature failure and was replaced with no other complications or need for further scanning. From the clinical experience gained using a full digital workflow, the authors can confirm that these work processes enable the fabrication of clinically reliable restorations, with all the benefits that digital methods bring to the dentist, the dental laboratory, and the patient.

Respiratory Systems of Dental Technicians Negatively Affected during 5 Years of Follow-Up.

Abstract: Abstrack Background: Dental laboratory technician is one of the professions in which dust exposure is frequently experienced and therefore the health of workers has to be monitored. Aims: In this study, changes in the pulmonary functions and of pneumoconiosis frequencies among dental technicians after five years were investigated by comparing the results of two screenings carried out in 2008 and 2013. Study Design: Cohort study. Methods: In 2008 and 2013, Provincial Health Directorate carried out two different health screenings covering all of the dental technicians working in dental laboratories in Denizli. In both screenings, a questionnaire was applied, with which socio-demographic and workplace properties of the technicians were obtained. In addition, Pulmonary function tests (PFT) and standard chest X-rays of the technicians were performed. The results of these two screenings were evaluated by a chest specialist, and physical examinations were performed as necessary. In 2013, technicians who had pathologies underwent computerized tomography (HRCT). In this study, the study group was composed of dental laboratory technicians that participated in both screenings (2008 and 2013) and the data obtained from the screenings were compared. The gathered data were analyzed using paired student-t and X2 tests. Results: A total of 125 dental laboratory technicians participated in the two screenings. Overall, 92% of the technicians were male and the mean age of the participants was 35. Technicians were working for 9 hours a day, 6 days a week. Total exposure time was calculated to be around 41 thousand hours. Approximately 60% of workers were smokers. When the results of PFT were analyzed, 73% of the first evaluations were found to be normal; however, this ratio decreased to 51% in the second analysis five years later. In the second PFT measurement, compared to the first, there was a 23% decrease in the forced vital capacity (FVC) value, and a 15.7% decrease in forced expiratory volume in one second (FEV1). While restrictive disorder was found 25% in the first PFT evaluations, this ratio increased to 31% in the second PFT. When the radiological results were considered, 62% of the first X-ray results were found to be normal but this ratio decreased to 18% in 2013. While reticular/reticulonodular opacities were found in 11% of cases in 2008, it increased to 30% in 2013. Seven technicians were diagnosed with pneumoconiosis (5.6%). Conclusion: Respiratory tracts of the technicians were negatively affected during the five year period. The number of pneumoconiosis cases (5.6%) shows that it is necessary to adopt comprehensive work health and safety precautions for laboratories.

Važnost komunikacije u fiksnoprotetskoj terapiji

Abstract: Communication in human relations takes place on two levels One level is verbal, while the other level is non-verbal The area of dental medicine is rapidly developing and the patient’s needs and knowledge are increasingly emerging In order to create a successful product of high quality, an interactive model of communication between the doctor of dental medicine and the dental laboratory or the dental technician is required The outcome of prosthetic therapy is dependent on the good communication among the members of a dental team Communication in dental medicine can be divided into: the communication between a doctor of dental medicine and their patient; the interpersonal communication among doctors of dental medicine; interdisciplinary communication; and the communication with the laboratory In order to provide the patient with the best possible stomatological care, the paradigm in contemporary stomatology has been transferred to an interdisciplinary team of experts who work together under the supervision of a clinical coordinator

The digital model for implant and thereof manufacturing system

Abstract: The present invention relates to a system for making a digital model used in making an artificial tooth and, more specifically, to a method for making a digital model for an implant which enables the making of a precise model simply using digital scan data provided by a dental clinic. The present invention enables the making of a model by recreating the depth and angle of a fixture, which is implanted into the alveolar bone of a patient, in a dental laboratory using the digital scan data sent from the dental clinic. The present invention enables a dental technician to make a precise and accurate artificial tooth in the dental laboratory by designing a precise model and making the artificial tooth, and thus the missed tooth perfectly occludes with adjacent teeth and no correction of the artificial tooth is needed. Accordingly, working hours can be reduced.

Current Trend in fabricating a Full Ceramic Restoration for Discolored Anterior Teeth: A Dental Laboratory Survey

Abstract: Aim: The aim of the survey conducted in dental laboratories was to evaluate the current trend in fabricating a full ceramic restoration for discolored anterior teeth through a questionnaire and personal interaction with the dental technician. Materials and methods: The survey questionnaire consisted of 20 questions aimed toward the current trend in fabricating a full ceramic restoration for discolored anterior teeth. This questionnaire was validated by a panel of senior prosthodontists and technicians and was sent to 32 dental technicians in Mumbai and Navi Mumbai. Results and conclusion: The results of the study showed that majority of the dental technicians preferred taking the stump shade themselves by visiting the clinic or inviting the patient to the laboratory. Majority of the dental technicians preferred using lithium disilicate material and its medium opacity ingots to fabricate restorations by the layering technique for masking discolored anterior teeth. Majority of the technicians believed that their dentists did not use try-in paste prior to luting of the restoration. Clinical significance: This survey would help to improve the rapport between the clinicians and dental laboratories and optimize the esthetics of the restorations fabricated for anterior discolored teeth.

Small opacities among dental laboratory technicians in

Abstract: After a case of advanced pneumoconiosis occurred in a dental laboratory technician, 31 other dental technicians and 30 control subjects controlled for smoking habits, sex, and age were investigated. More technicians (55%) than controls (30%) had at least grade 1 dyspnoea (p > 005). Multiple regression analysis showed that 13 technicians who had produced dental prostheses for at least 15 years had consistently lower lung function (FVC, FEV,, FEV,/FVC, MEF50, and DCO single breath), although the differences were not statistically significant. All mean lung function values for technicians and controls were within normal limits. Increases in MEF50 after breathing 80% helium and 20% 02 failed to show small airways dysfunction among the technicians. Of the six with radiological pneumoconiosis (5 simple, 1 advanced) four had symptoms. All three biopsy specimens showed varying degrees of pulmonary fibrosis. DCO single breath was diminished in four of the six. One male dental technician had scleroderma and possibly Erasmus syndrome. Blind readings showed an increased number of suspicious chest x rays films (^ category 0/1) among older smokers and ex smokers (p = 0013) regardless of occupation. Our results support other evidence that dental technicians are at risk of developing pneumoconiosis. Therefore, adequate hygienic control of dental laboratories is indicated. Dental laboratory technicians may be exposed to several potentially toxic materials. Non-precious metal alloys containing chromium, cobalt, molyb denum, beryllium, or nickel are used in the production of crowns, bridges, and dentures.12 Liners with asbes tos may be used in casting procedures and methyl methacrylate in the preparation of dentures.3 Silica is used as a sandblasting abrasive and is also present in porcelain. A powder containing 75% silica is sometimes used as refractory investment material for casting procedures.4 Polishing materials may contain iron, aluminium, silica, and chromium. Pneumoco nioses have been described in dental technicians caused by various presumed agents: beryllium,25 silica,46 and metals (cobalt, chromium, tungsten, molybdenum) with or without silica.7"11 Analysis of lung biopsy specimens has shown the presence of various metals and silica.578 "

Process management system for dental clinic and dental laboratory

Abstract: The present invention provides a process management system for manufacturing dental prostheses, comprising: a plurality of laboratory manager terminals (100); a plurality of delivery company terminals (200); a plurality of clinic terminals (300); and a server (500) for transreceiving information with the laboratory manager terminals (100), the delivery company terminals (200), and the clinic terminals (300).

Surveying and Laboratory Procedures

Abstract: Prosthodontic treatment is the end product from the mutual collaboration between the dentist and the dental technician. The laboratory hooks the dentist up with the material to collect precise data for laboratory procedures. The quantity and the quality of data delivered to the dental laboratory draw the borders to the dental technician. The dental technician can only integrate the provided data into construction phase; however the clinician on the other hand should navigate the laboratory procedures as well. Therefore, besides mastering the clinical work, the dentist must be occupied with not necessarily the ability but the knowledge of laboratory procedures to be able to evaluate the material delivered from the laboratory and to manage the overall process accordingly. The clinicians’ use of dental surveyor in planning and designing RPDs definitely improves the quality of preprosthetic preparations and the resultant prosthesis. The basic principles of surveying and steps of laboratory procedures are summarized in this chapter.

Disinfection of Dental Impressions and Effects of Disinfectants on Dental Impressions

Abstract: The transfer of infectious microorganisms between patient, doctor and auxiliary staff is called ‘cross infection’. Due to the applications and materials used in prosthetic treatments, prosthodontists, nurses and dental technicians come up against several infections which can be transmitted from patients. The delivery of dental impressions, obtained from patients during prosthetic applications, without disinfection leads to cross contamination between clinic and dental laboratory. To prevent contamination, disinfection of dental impressions is recommended. However, disinfection methods and disinfectants can affect the characteristics of dental impression materials. The aim of this paper is to review the disinfection of dental impressions and the effects of disinfectants on dental impressions in the light of previous studies.

Focusing on the Dental Laboratory practice education)

Abstract: Purpose: This study set out to propose plans for more efficient and effective clinical practice by investigating thecurrent state of clinical practice in the field of dental technology and thus provide basic data to develop pre- and post-education programs for clinical practice.Methods: The subjects include dental technicians at dental technical laboratories that were appointed as the placeof clinical practice by the Department of Dental Technology of G University. The survey period spanned fromDecember 22, 2014 to January 20, 2015. Total 250 questionnaires were distributed to them, and 190(76.0%) were returned. After excluding 23 whoseanswers were uncertain or seemed to lack reliability, total 167(66.8%) were used in final analysis.Results: 1. The most frequent practice the student did during clinical practice was articulator attachment, whichwas followed by pin operation or model making, one’s own task and practice, sand and crow sculpturing, burying,casting, and grinding.2. In case of going through the entire process, porcelain had the most students at 39(23.4%), being followed bycrown & bridge at 28(16.8%), clinical model at 23(13.8%), full denture at 17(10.2%), and partial denture at17(10.2%) in the order. 3. Of the students, 59.8%(30.5% for reinforced basic practice; 29.3% for intensive practiceeducation) said that intensive practice education should be reinforced in school; and 22.3% said that intensive theoryand practice education was needed, which indicates that 82.6% voiced their opinion of reinforcing education aroundpractice. 4. The students felt that they lacked diligence, passion, and theoretical knowledge somewhat and were relativelygood at clinical adaptation and operational skills. Conclusion: The findings show that the students felt an absolute lack of practice education as the schooleducation was focused on theory and national exams in the field of dental technology, thus raising a need toreinforce practice education.