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In dental practice, the fidelity of a model is given by the quality and type of material used, the technique by which it is made, and last but not least by the experience and skill of the dental technician. But, the emergence of CAD-CAM technology has led to a major change in the stages of making the working model, through the development of the virtual model. Thus, the purpose of this material is to perform a comparative study between several techniques for obtaining sectional working models, with or without pins, compared to the virtual model obtained by CAD-CAM technique.

Dental veneers made of ceramic masses are considered on conservative solution for patients that require an enhancement of shape, shade, dimension and/or position of anterior teeth. Ceramic veneers are successfully used on large scale to hide tooth discoloration, to correct the position and minor defects of teeth, without removing significant quantities of hard tissues.

Prosthetic rehabilitation of the maxillary front teeth is an extremely laborious problem for the dental team, consisting of the dentist and the dental technician. If for the physiognomic component the most recommended materials are the ceramic masses, for the resistance substrate there are several variants. Conventional technologies using dental alloys and modern ones involving the use of zirconium dioxide can be used successfully in performing fixed prosthetic restorations in the maxillary frontal area, both options having both advantages and disadvantages, as we will describe in this material.

Communication between the clinical department (dental office) and the technical department (dental laboratory) is one of the topics that often comes to the mind of every dental technician or dentist. This communication can be done by different methods as a type of inter-compartment communication, but diagnostic wax-up, along with Digital Smile Design and mock-up, is not only one of the most effective, but also one of the clearest and precise ways of transmitting information from the dental technician to the dentist, and implicitly to the patient, but also vice versa.

The Resistance was a reaffirmation of France's independence and individuality, as well as a struggle to regain freedom and, above all, national integrity. In fact, many historians appreciate that the French Resistance could have achieved more if it had been more effectively integrated into Allied plans and strategies. Thus, in this material we tried to present some short biographies of dentists who worked in the French Resistance against the German occupation troops, some of them even paying with their lives for the courage they showed.

Introduction. An important role in the appearance of acute or chronic infections is played by bacterial biofilms that contain several bacterial species and that develop preferentially on inert surfaces, dead tissues and medical devices. Purpose. In this material we tried to make an interesting study, regarding the adhesion capacity of microbial biofilms characteristic of the oral cavity of human subjects on the surface of materials used for industrial scale manufacturing of dental implants: titanium and zirconium dioxide (Zirconia). Material and methods. For this study were used plates of Ti4 and zirconia, on which adhesion of different bacterial strains belonging to the species Enterobacter cloacae, Klebsiella oxytoca and Klebsiella pneumonia were tested. Results and discussions. A rather high microbial load was observed on both types of materials for all types of bacterial strains studied. For certain types of strains, a lower colonization was noted in the case of zirconium dioxide compared to Ti4 surfaces. Conclusions. Although Zirconia has been reported to have a lower susceptibility to bacterial adhesion, our study contradicts this aspect specified in the literature. Both titanium and zirconium dioxide are promptly colonized by existing bacteria on the teeth left in the oral cavity.

Introduction. Titanium and the alloys that contain this element became in the last decade of the twentieth century almost irreplaceable materials in many biomedical fields, including dentistry. Purpose. The purpose of this study is to test and evaluate the cyto- and genotoxicity of Ti4 and Ti-6Al-4V, to obtain biomaterials with antimicrobial properties, compatible with the human body. Material and method. Ti4 and Ti-4Al-6V in powder form were analyzed using cell proliferation analysis and micronucleus test. Two concentrations of 1.5 mg/ml and 3 mg/ml were tested for each type of sample. Results and discussions. For both materials tested in the two concentrations, the presence of micronuclei was observed, but within normal limits. Conclusions. Although the variations are within normal limits, it should be noted that for Ti-6Al-4V the incidence was higher at both concentrations than in the case of Ti4.

Sedentary behavior, both professional, occupational, and leisure, recreational, is one of the major risk factors for cardio-metabolic health and premature mortality. But, we find this sedentary behavior in many of the existing professional activities in 2021, among which are the professional activities with a medical profile in the field of dentistry: specific activities of the dental office (and here we discuss dentists and dental nurses) and activities specific to the dental technique laboratory (in this case, we are talking about dental technicians).

Introduction. In order to achieve the goals of oral implantology, it is of great importance to obtain tissue integration (bone and epithelial) of dental implants. Bone integration has the role of rigidly fixing the dental implant at the level of the supporting bone, while ensuring the transfer of masticatory forces to the neighboring bone, while the soft tissues integration has the role of creating a barrier around these medical devices, with the role of protecting the underlying bone and preventing the access of microorganisms. Purpose. In this material we wanted to perform a statistical analysis on the gingival integration and osseointegration of dental implants in the oral cavity. Material and method. The analysis was performed on a number of 21 patients with a total of 97 dental implants, approximately one year after the prosthetic loading of the implants. The analysis was based on bleeding index, gingival index but also on the depth of the peri-implant canal and bone resorption around the implant. Results and discussions. Most of the implants analyzed showed no signs of inflammation. A small number (less than 30%) showed incipient signs of inflammation, falling within the data in the literature. Conclusions. Early detection of tissue changes around the implant and proper treatment will reduce the risk of more serious injuries and implant failure.

Introduction. Peri-implantitis is a condition of the tissues adjacent to dental implants, which can occur in patients with implant-prosthetic restorations, following inadequate prophylactic measures. However, these peri-implants, untreated or improperly treated, can lead over time to quite severe complications, which can quickly turn into emergencies of low, medium or increased intensity in the usual dental care. Purpose. Peri-implantitis is not a major dental emergency, but ignoring and/or treating it incorrectly can lead to complications that are considered major in dentistry. That is why we tried through this study to verify the knowledge related to peri-implantitis as well as the complications that may arise from the nontreatment of these diseases, among the practitioners involved in this field. Material and method. The study was conducted with the help of 37 specialists involved in implantprosthetic treatments, aged between 37 and 53 years, using a 7-point questionnaire. Results and discussions. The results show the concern of specialists in the field of oral implantology regarding peri-implantitis, as well as the complications arising from them. Conclusions. Knowing the causes but also the complications arising from peri-implantitis are very important for the creating preventive programs, which with a reduced effort bring the long-term success of implant supported restorations.

Edward Hartley Angle was an eminent American scientist, dentist, great inventor, being rightly considered to be the father of modern orthodontics. The great American scientist was the author of an impressive number of patents (46) and was the coordinator of 7 editions of some impressive orthodontic treatises. Thus, in this material, important data from the biography of Dr. Edward Hartley Angle.

Introduction. Peri-implantitis is a non-specific inflammation, induced or maintained in the host tissues. Peri-implantitis usually presents a succession of specific symptoms, such as: bleeding on palpation, mobility of the dental implant, pain, increased depth of the pockets located around dental implants. Purpose. Thus, in this material we wanted to carry out a review of the main notions, both theoretical and practical, which characterize the diseases of surrounding tissues of dental implant called peri-implantitis. Material and method. For this study, we used 31 practitioners from Bucharest who frequently perform implant-prosthetic rehabilitation treatments, based on a questionnaire consisting of 6 questions. Results and discussions. The doctors included in the study showed that they have a thorough training in the field of implant-prosthetic restorations and of course in the diagnosis and treatment of peri-implantitis. Conclusions. In-depth knowledge of the notions related to peri-implantitis leads to an early diagnosis, favoring the rapid application of a treatment that prevents the occurrence of subsequent complications.

Introduction. Atherosclerosis represents the process of stiffening of the arterial wall and includes arterial changes secondary to atherosclerosis, as well as physiological changes, reducing vascular elasticity in the elderly. However, the importance of knowing the pathology of atherosclerosis is mandatory among dentists, given the high frequency of patients with atherosclerotic lesions. Purpose. Through this study we tried to familiarize dentists on the therapeutic behavior towards patients with atherosclerosis but also the risks arising from it. Material and method. 87 practitioners from Romania helped to carry out this study between September and November 2018. Results and discussions. A clear picture emerged regarding the changes and manifestations in patients with atherosclerosis by dental practitioners as well as the attitude to be adopted in the case of treatments for such patients. Conclusions. Knowing the pathology of patients at cardiovascular risk as well as the therapy to be applied for them, is a must for dentists given the growing number of patients and the pathology with different stages of evolution.

Objective. The purpose of this study is to draw attention of dental medicine specialist’s team on risks they are exposed to, by modifying treatment plans in order to fit medical tourism programs. Material and method. In this study a questionnaire was applied to a number of 173 dentists with differend specializations, regarding the adaption of treatment options for patients from medical tourism programs and risks posed by changes they had applied. Results. The analysis of results shows that the treatment approach for medical tourists is mostly based on a multidisciplinary team. In terms of quality of the treatment it is distinguished the use of specialists focused on specific fields of dentistry, but we must not neglect the fact that the therapeutical act is adapted to a reduced treatment time. Conclusions. For most of professionals of dental tourism, the financial aspect comes first and not the ethical aspect of medical care.

Objective. The purpose of the study is to identify the musculoskeletal problems in dental professionals and the causes leading to them to rank. The most frequent ones were ranked in order to elaborate operational and global projects and differentiated treatment and prophylaxis units focused on that certain problem. Material and method. The 133 subjects (dental students and specialist) answered a 14 items questionnaire. Results. The results of the questionnaire were centralized and statistically analyzed using descriptive statistics. Discussions. The results showed that most of the subjects (69.92%) had growth problems. 90.23% of them did not consulted a kinetoterapist but they were aware of the necessity of seeking specialty treatment in the future. Conclusions. The present study conducted to preliminary conclusions that will be the start point of further extended studies, emphasizing the necessity of Kinetotherapy classes in Dental School.