1,720,961 research outputs found
Combined Orthodontic and Restorative Minimally Invasive Approach to Diastema and Morphology Management in the Esthetic Area. Clinical Multidisciplinary Case Report with 3-Year Follow-Up
Full text linkCeramic laminates are restorations that are bonded using adhesive techniques, which provide for the treatment of the prepared dental elements according to well-defined steps. Adhesive cementation guarantees high predictability and esthetics. Orthodontic treatment is the first choice in patients with a dental misalignment. Patients who have dental element color and shape issues will undergo restorative treatment following orthodontics. Case Report. This clinical report describes a case treated with an interdisciplinary approach (orthodontic and prosthetic) of a patient who presented with diastemas, inversion of dental axes, small clinical crowns, and chromatic imperfections in the anterior maxillary teeth. The esthetic expectations of the patient for the anterior portion of the maxillary anterior teeth have been successfully achieved through orthodontic treatment and the realization of ceramic veneers. An accurate interdisciplinary evaluation of the treatment was necessary for a satisfactory result in the anterior maxillary teeth esthetically compromised in several aspects. Discussion. The modern materials used with the strict protocol of the adhesive procedures allow a minimally invasive, highly esthetic approach with an excellent long-term prognosis. The restorations must reproduce the physiological characteristics of the natural teeth aiming at an excellent biological, biomechanical, functional, and esthetic integration. Many adult patients come to visit with a combination of problems; the esthetic rehabilitation of these cases requires the evaluation of the quantity of gingival exposure, of the gingival architecture, of the size of the clinical crowns, and of the dental position. The ideal treatment of these cases involves an interdisciplinary approach. Prosthodontists, periodontists, orthodontists, and dental technicians must work together because the understanding of the various phases of treatment is fundamental to achieve the desired clinical result
Rehabilitation of a patient with mini-implants after avulsion of the upper incisors: A 13-year follow up
Full text linkTreatment following avulsion of a tooth in the growing patient requires a complex multidisciplinary therapeutic approach for the clinical team. The literature offers different therapeutic solutions following the avulsion of one or more teeth, but unfortunately all of them have negative repercussions on the patients' life quality, they involve long treatment plans, they are not always feasible, and they have limits. Alternatively, a new treatment concept that uses mini-implants can be considered and is presented with its rationale, clinical steps and 13 years of follow up of one case
Orthodontic extrusion for pre-im-plant site enhancement in a posterior area: An interdisciplinary case report
No full textReplacing a compromised dental element with a dental implant is a well documented procedure with a high success rate. The immediate placement of a dental implant at the time of extraction requires a favorable anatomical scenario. If the anatomical scenario is not ideal, it is possible to perform surgical procedures in order to increase hard and soft tissues after tooth extraction or to do orthodontic extrusion, which reduces the number of surgical procedures and times. Extrusion must be followed by a prolonged retention period to allow remodeling and adaptation of the periodontal tissues with the new tooth position. Orthodontic extrusion makes the positioning of dental implants more favorable. Ridge preservation allows placement of the dental implant within the bone thickness on a suitable axis. The case presented included orthodontic extrusion and, subsequently, the extraction of a compromised tooth in order to guarantee an ideal quantity of hard and soft tissues for positioning a post-extraction implant
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Traumatic Dental Injuries: Clinical Case Presentation and a 10-Year Epidemiological Investigation in an Italian Dental Emergency Service
Full text linkTraumatic dental injuries (TDIs) are very common in the world population, and international literature reports several studies which helped in the definition of international guidelines. The aim of this study is to present two clinical cases of TDI and to investigate epidemiological and etiological aspects of TDIs in patients treated in Modena, Italy, between January 2010 and December 2020. The presented case reports are two explicative clinical cases of successful TDI management with a long-Term follow-up. The epidemiological analysis was performed on patients who visited the Dental Emergency Service of the Dentistry and Oral-Maxillo-Facial Surgery Unit of Modena (Italy) over a period of 10 years. Data relating to age, gender, type of trauma, and place of accident were collected. Five-hundred-sixty-five TDIs that occurred to patients from 1 to 68 years old were reported, with a total of 860 injured teeth. The peak age at which TDIs are most represented varies between 2 and 3 years old, and they occurred frequently from 1 up to 7 years old. 57.5% were male, while 42.5% were female. The most common trauma resulted to be the uncomplicated crown fracture (20%), immediately followed by lateral luxation (19%), intrusive luxation (18%), avulsion (17%), and complicated crown fracture (15%). TDIs occurred at home in 44% of cases. The need for more prevention training must be highlighted, due to the fact that many TDIs occur at home and in a preschool age
The occlusal precision of milled versus printed provisional crowns
Full text linkObjectives: The aim of this study was to compare the occlusal precision of computer-aided-design/ computer-assisted-manufacturing (CAD/CAM) milled versus 3D printed polymethylmethacrylate (PMMA) temporary prosthetic crowns, starting from the same digital CAD design. Materials and methods: The study sample included 34 patients presenting 34 premolars in need of prosthetic rehabilitation: a total of 68 temporary crowns were manufactured, 34 of which milled and 34 printed. Immediately after manufacturing, the milled and printed provisionals were scanned with a desktop scanner (E1, 3Shape) to obtain STL files, that were superimposed to the original CAD design in order to identify the occlusal trueness (Analysis A). A second occlusal comparison was performed by scanning both kind of provisional after being placed intraorally with Trios scanner (3 Shape); intraoral scans were obtained in order to compare STL files of provisionals before and after occlusal adjustments (Analysis B). The occlusal trueness was identified at three reference points, P1 (vestibular cusp), P2 (palatal / lingual cusp), P3 (central fossa). The statistical analysis was performed using the R 3.4.3 statistical software (The R Foundation for Statistical Computing), with a significance level of p <0.05. Results: Overall, the printed crowns showed lower occlusal differences than the milled crowns, when compared to the CAD design file, with a statistically significant difference in P1 (difference of 0.025 ± 0.046 mm), P2 (difference of 0.027 ± 0 0.044 mm) and P3 ( difference of 0.018 ± 0.050) for Analysis A (p <0.05). In the Analysis B the direct comparison between the degree of average difference between the pre-adjustment and the post-occlusal adjustment of the milled and printed crowns shows that the printed crowns have lower occlusal mean difference values in all three points compared to the milled ones (difference of 0.146 ± 0.273 mm in P1, 0.285 ± 0.360 mm in P2 and 0.257 ± 0.277 mm in P3). Conclusions: Within the limitation of this study, the data obtained showed a better occlusal surface dimensional accuracy of the 3D printed provisional crowns, when compared to the milled ones. Comparing the results obtained, it is possible to assume that the intraoral scans also had a contribution to occlusion, beside the manufacturing method. 3D printing can be successfully applied for manufacturing temporary PMMA crowns
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