scholarly journals MICROSCOPIC EVALUATION OF THE QUALITY OF DENTAL REPLACEMENT

2017 ◽  
Vol 8 ◽  
pp. 17-19
Author(s):  
Františka Pešlová ◽  
Daniela Koštialiková ◽  
Richard Veselý ◽  
Andrej Dubec ◽  
Maxim Puchnin
Keyword(s):  
Wide Spectrum ◽  
Permanent Tooth ◽  
Microscopic Evaluation ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Materials Used ◽  
The Aesthetic ◽  
Ceramic Crown ◽  
Real Challenge

<p>The permanent tooth replacements including metal-ceramic crowns are a convenient solution for the renewing of the original function of the whole set of teeth as well as of the natural appearance. Development and preparation of suitable tooth replacement presents a real challenge for dental engineers as the replacement has to meet all the conditions and requirements of the dental medicine as well as patient’s needs and wishes. The preparation of the metal-ceramic crown is a sophisticated process and the dental engineer has to prepare alwaysa unique replacement on demand. In dental medicine there is a wide spectrum of inorganic and organic materials used formanufacturing of dental replacements. Each of the material has specific properties leading to distinct applications.Besides the material properties, the attention has to be paid to the aesthetic function and biocompatibility of the material to ensure thecomplete restoration of the whole set of teeth.</p>

scholarly journals MANUFACTURING TECHNIQUE OF METAL CERAMIC RESTORATION WITH IMPLANT-ABUTMENT AT GINGIVAL RESORPTION CASE

2019 ◽  
Vol 3 (1) ◽  
pp. 22
Author(s):  
Galih Paramarta ◽  
Eny Inayati
Keyword(s):  
Three Dimensional ◽  
Dental Restoration ◽  
Coating Application ◽  
Manufacturing Technique ◽  
Implant Abutment ◽  
Metal Ceramic ◽  
Manufacturing Techniques ◽  
The Aesthetic ◽  
Ceramic Restorations

Background: The low levels of patient satisfaction and confidence in the restoration of the gingival resorption results in impaired quality of life in both functional and psychosocial aspects. It is necessary to manufacture a dental restoration to restore the mastication, phonetic, and aesthetic functions associated with soft tissue repair. Manufacture of gingiva ceramic restorations which are believed to be an alternative to restore the aesthetic function and harmonization of the patient’s teeth. In terms of manufacturing techniques, this restoration has a level of difficulty in achieving a balance between “White aesthetic” and “aesthetic pink”. Objective: This study aims to provide knowledge to the reader of Manufacturing Technique of Metal Ceramic Restoration with Implant-Abutment at Gingival Resorption Case. Reviews: Gingiva ceramic restorations can be used to create esthetic implant-supported restorations when bone and gingival tissues are deficient and surgical replacement of such tissues is not possible. Dental technicians should be able to analyze the three-dimensional shapes of gingival anatomy, color, texture, smile components, the balance of the “pink aesthetic” and “white aesthetic”. Conclusion: Manufacturing Technique of Metal Ceramic Restoration with Implant-Abutment at Gingival Resorption Case including the manufacture of metal coping, oxidation, application of opaque coating, application of the first “white aesthetic” ceramics (Opaque Dentine, Dentine, Enamel and transpa on crown coping restorations), Application of opaque gingiva layer, gingival ceramics build-up "pink aesthetics”, first firing, followed by correction build-up, and second firing, and ends with the glazing process.

scholarly journals Marginal Strength of Collarless Metal Ceramic Crown

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Sikka Swati ◽  
R. Chowdhary ◽  
P. S. Patil
Keyword(s):  
Fracture Strength ◽  
Testing Machine ◽  
Compressive Load ◽  
In Vitro Study ◽  
Instron Testing Machine ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Ceramic Restorations ◽  
Ceramic Crown

Metal ceramic restorations have been implicated for the discoloration in area of labiogingivalmargin. Attempts to rectify this, by altering the design of metal frameworkswill lead to decrease in fracture strength atmargin. This in vitro study compared the fracture strength at margins of metal ceramic crowns cemented to metal tooth analogs. Crowns evaluated with different marginal configurations, shoulder and shoulder bevel with 0 mm, 0.5 mm, 1 mm, and 1.5 mm, were selected.Methods. Maxillary right canine typhodont tooth was prepared to receive a metal ceramic crown with shoulder margin. This was duplicated to get 20 metal teeth analogs. Then the same tooth was reprepared to get shoulder bevel configuration. These crowns were then cemented onmetal teeth analogs and tested for fracture strength atmargin on an Instron testing machine. A progressive compressive load was applied using 6.3 mm diameter rod with crosshead speed of 2.5 mm per minute. Statisticaly analysis was performed with ANOVA, Student's “t” test and “f” test.Results. The fracture strength of collarless metal ceramic crowns under study exceeded the normal biting force. Therefore it can be suggested that collarless metal ceramic crowns with shoulder or shoulder bevel margins up to 1.5 mm framework reduction may be indicated for anteriormetal ceramic restorations.Significance. k Collarless metal ceramic crowns have proved to be successful for anterior fixed restorations. Hence, it may be subjected to more clinical trials.

scholarly journals PULPOTOMIYA AT PROSTHETICS OF TEETH. PILOT RESEARCH

2018 ◽  
Vol 14 (2) ◽  
pp. 48-51
Author(s):  
Олег Петрикас ◽  
Oleg Petrikas ◽  
Арнольд Петрикас ◽  
Arnold Petrikas ◽  
Алексей Картошкин ◽  
...  
Keyword(s):  
Pain Threshold ◽  
Clinical Observation ◽  
Specific Training ◽  
Direct Measurements ◽  
Removable Denture ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
The Subject ◽  
Low Efficiency ◽  
Ceramic Crown

The subject. Significant preparation of the teeth for metal-ceramic or ceramic crowns in most cases is accompanied by a preliminary devitalization of the teeth, which shortens the period of their survival. The problem of ensuring the vitality of supporting teeth can be solved by amputating only the coronal pulp, which inevitably overheats during preparation, while retaining the root pulp. The skeptical attitude of dentists to vital pulpotomy may be explained by the often unsuccessful (ineffective) use of this method for teeth with already affected pulp. The hope for success in this study is based on the choice of intact teeth for vital pulpotomy of subsequent prosthetics. Urgency. The amputation method of endodontic dentistry is not used for prosthetic purposes. This can be explained by its low efficiency when using teeth with inflamed pulp. The aim of the work is to confirm the effectiveness of vital pulpotomy in a typical dental situation and subsequent prosthetics. Methodology. Clinical observation of the patient before and during 1 year after treatment, with the use of clinical and modern paraclinical methods of examination. Diagnosed. Treatment is planned: removable denture on the upper jaw with a preliminary shortening of the tooth 46 and subsequent use of a metal-ceramic crown. Significant sosotoyanie hard tissues of the tooth 46 and the subsequent preparation for artificial crowns required endodontic-specific training. It was supposed to preserve the root pulp (vital pulpotomy). As a result, there were no complaints at the control examination 1 year after pulpotomy. The pain threshold from the electrode was 11 µa. Summary. The vital pulpotomy of the tooth with intact pulp showed the possibility of its effective prosthetics with an artificial crown while maintaining the viability of the root pulp. The technique of introduction of the electrode into the cavity of the tooth allowed to conduct direct measurements of the pain threshold of the root pulp in the dynamics of (application for invention No. 2017115518/17(026915) from 02.05.2017).

scholarly journals Subjective Differences between Dentists and Patients about Relative Quality of Metal Ceramic Restorations placed in the Esthetic Zone

2017 ◽  
Vol 18 (2) ◽  
pp. 112-116 ◽  
Author(s):  
Khurshid A Mattoo ◽  
Faisal M Alkhayrat ◽  
Hussam A Madkhali ◽  
Ibrahim H Geathy ◽  
Mohammed AW Qahhar ◽  
...  
Keyword(s):  
Undergraduate Students ◽  
Academic Staff ◽  
Single Crown ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Relationship Of ◽  
Ceramic Restorations ◽  
The Relationship ◽  
Relative Quality

ABSTRACT Introduction Esthetic perceptions could differ between the dentist and his patients among various regions and cultures. Aim The aims of this study were to evaluate the subjective differences between the dentist and the patient in terms of esthetics of metal-ceramic crowns (MCcs). The study also aims to compare the mesiodistal (MD) and buccolingual (BL) dimensions of the cemented crown with its respective natural antimeric tooth. Materials and methods A total of 85 patients seeking treatment for a single crown (MC) were treated by the undergraduate students under supervision of respective academic staff. After cementation of the crowns, a 9-point questionnaire was given to patient and different dentists. A treatment cast for every single crown was poured. Then, the MD and BL dimensions of the crowns were compared against their respective antimeric tooth. Results The dentists and the patients agreed in the range of 50.5 to 90.5%. Least subjective differences were found for the length and width of the cemented crowns. The highest differences were noted for symmetry between the cemented crown and its antimeric natural tooth. A total of 31 to 38% of the patients differed from the dentist's evaluation for shade of the crown, color of the crown at the margin, contour of the crown, and the relationship of the crowns with the surrounding gingiva. The highest MD and BL dimensions were in the cemented crown of canines, while the lowest MD and BL diameters were for the cemented crowns of the lateral incisor crowns. Conclusion Dentist and patient mostly agreed in terms of length (90%), width (81%) and relation of crown with free gingiva (74%). However, they differed mostly on the symmetry of the cemented crowns. The highest MD dimensions and BL diameter were in the cemented MCcs of canine, while the lowest were with lateral incisors. Clinical significance While fabricating a dental prosthesis, the dentist must know about patients’ perception of esthetics; otherwise both clinical and laboratory efforts would not be enough to satisfy the esthetic needs of the patient even if the restoration is technically correct. Perceptions related to symmetry differ mostly between dentist and patient. How to cite the article Al Moaleem MM, Alkhayrat FM, Madkhali HA, Geathy IH, Qahhar MAW, Yaqoub A, Mattoo KA. Subjective Differences between Dentists and Patients about Relative Quality of Metal Ceramic Restorations placed in the Esthetic Zone. J Contemp Dent Pract 2017;18(2):112-116.

scholarly journals In vitro evaluation of microleakage of various types of dental cements

2010 ◽  
Vol 138 (3-4) ◽  
pp. 143-149 ◽  
Author(s):  
Vesna Medic ◽  
Kosovka Obradovic-Djuricic ◽  
Slobodan Dodic ◽  
Renata Petrovic
Keyword(s):  
Methylene Blue ◽  
Glass Ionomer Cement ◽  
Resin Cement ◽  
Glass Ionomer ◽  
Cement Interface ◽  
All Ceramic ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Ceramic Crown

Introduction. Microleakage is defined as the clinically undetectable seepage of oral fluids containing bacteria and debris between cement layer and tooth restoration. Objective. This in vitro study investigated the effect of different dental cements (zinc-phosphate, polycarboxylate, glass-ionomer and resin cement) on microleakage in different ceramic crown systems (metal ceramic crown, metal ceramic crown with a porcelain margin, Empress 2 and In Ceram all-ceramic crowns) fixed on extracted human teeth. Methods. One hundred and sixty intact human premolars were randomized to four groups of forty teeth each, according to the different ceramic crown systems. They were prepared in a standardized manner for metal-ceramic and all-ceramic crowns. Crowns were made following a standard laboratory technique, and each group of crowns were divided into four groups according to the different cement agents and cemented on their respective abutments. The specimens were subjected to thermocycling, placed in methylene blue solutions, embedded in resin blocks and vertically cut in the bucco-oral and meso-distal direction. The microleakage in the area of tooth-cement interface was defined as linear penetration of methylene blue and was determined with a microscope to assign microleakage scores using a five-point scale. Results. A significant association was found between a cement type and degree of microleakage (p=0.001). No statistically significant differences were found among the different ceramic crown systems luted with the same dental cement. The smallest degree of microleakage was observed in specimens luted with resin cement (X=1.73), followed by glass-ionomer cement (X=2.45) and polycarboxylate cement (X=3.20). The greatest degree of microleakage was detected in the crowns fixed with zincphosphate cement (X=3.33). Conclusion. The investigated dental cements revealed different sealing abilities. The use of resin cement resulted in the percentage of 0 microleakage scores. Due to this feature, the resin cement is to be recommended in everyday clinical practice.

scholarly journals Bite Reconstruction in the Aesthetic Zone Using One-Piece Bicortical Screw Implants

2018 ◽  
Vol 2018 ◽  
pp. 1-4 ◽  
Author(s):  
Stefan Ihde ◽  
Łukasz Pałka ◽  
Maciej Janeczek ◽  
Piotr Kosior ◽  
Jan Kiryk ◽  
...  
Keyword(s):  
Early Childhood ◽  
Single Phase ◽  
Functional Results ◽  
Immediate Loading ◽  
Healthy Male ◽  
Metal Ceramic ◽  
History Of ◽  
Ceramic Crowns ◽  
The Aesthetic ◽  
Bicortical Screw

The aim of this article was to present the clinical application of a new, smooth surfaced one-piece bicortical screw implant with immediate loading protocol. An 18-year-old, healthy male patient with a history of total dislocation and replantation of teeth 11 and 21 in early childhood was admitted to the clinic. Teeth 11 and 21 were extracted, and two long one-piece implants were inserted at extraction sockets in one surgical session under local anesthesia. Temporary composite crowns were placed in the patient on the same day. After 3 months, the single-phase two-layer impression was made and the composite crowns were replaced with metal-ceramic crowns. After 12 months, satisfactory aesthetic and functional results were obtained.

scholarly journals Clinical efficiency of orthopedic treatment of dental defects by arc prostheses with polyoxymethylene frame

2020 ◽  
pp. 29-34 ◽  
Author(s):  
V. V. Konnov ◽  
M. R. Harutyunyan ◽  
M. V. Vorobieva ◽  
A. S. Khodorich ◽  
R. N. Mukhamedov ◽  
...  
Keyword(s):  
Clinical Efficacy ◽  
Clinical Effectiveness ◽  
Orthopedic Treatment ◽  
Clinical Efficiency ◽  
Clinical Methods ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Manufacturing Techniques ◽  
Ceramic Crown

Currently, manufacturing techniques for removable orthopedic structures made of thermoplastic materials are widely used.Objective. To determine the clinical effectiveness of orthopedic treatment of dentition defects with arch prostheses with a framework made of polyoxymethylene using a modified design of supporting metal-ceramic crowns. Using clinical methods, 76 patients with defects in the dentition were examined, who underwent orthopedic treatment with arch prostheses with a frame made of metal and polyoxymethylene. As a result of the study, the clinical efficacy of using the proposed design of a metal-ceramic crown for a support-retaining clasp made of polyoxymethylene and a method for creating a retention zone in a ceramic-metal crown is proved.

scholarly journals Comparative analysis of the effectiveness of indirect restorations of anterior

2017 ◽  
Vol 21 (1) ◽  
pp. 26-29
Author(s):  
S. Yu Maksyukov ◽  
M. K Lemeshko
Keyword(s):  
Comparative Analysis ◽  
Dental Treatment ◽  
Health Impact ◽  
Dimensional Structure ◽  
Medium Term ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Front Group ◽  
High Level

A comparative analysis of the effectiveness of indirect restorations of anterior in 35 patients. Studied the objective criteria of the quality of dental treatment and quality of life Oral Health Impact Profile-OHIP-14RU in the period up to 1 year. It is established that indirect restorations are highly resistant according to the criteria of form, color, roughness. In addition, at a high level in the medium term, retain the integrity and conformance of the design. Among the indications for indirect restorations metal-ceramic crowns-dimensional structure or texture of the tooth were observed in 31% ofpatients, multiple fillings, defects of shape, and disposition - 41, 17 and 11% respectively. When using metal crowns, on the stage of the preparatory treatment shows deponirovanie 41,1% of the teeth. In patients who underwent restorations in the front group were made metal-ceramic crowns, at the dispositions ofpulpless 80% of the teeth, just the restoration of the 11th, 21st, 31st and 41st teeth was performed in 58,8%.

Model and Method for Contributor’s Quality Assessment in Community Image Tagging Systems

2018 ◽  
pp. 45-51
Author(s):  
A. V. Ponomarev
Keyword(s):  
Large Scale ◽  
Wide Spectrum ◽  
Preference Relation ◽  
Pairwise Comparison ◽  
Ground Truth ◽  
Comparison Method ◽  
Characteristic Matrix ◽  
Image Tagging ◽  
Proposed Model

Introduction: Large-scale human-computer systems involving people of various skills and motivation into the information processing process are currently used in a wide spectrum of applications. An acute problem in such systems is assessing the expected quality of each contributor; for example, in order to penalize incompetent or inaccurate ones and to promote diligent ones.Purpose: To develop a method of assessing the expected contributor’s quality in community tagging systems. This method should only use generally unreliable and incomplete information provided by contributors (with ground truth tags unknown).Results:A mathematical model is proposed for community image tagging (including the model of a contributor), along with a method of assessing the expected contributor’s quality. The method is based on comparing tag sets provided by different contributors for the same images, being a modification of pairwise comparison method with preference relation replaced by a special domination characteristic. Expected contributors’ quality is evaluated as a positive eigenvector of a pairwise domination characteristic matrix. Community tagging simulation has confirmed that the proposed method allows you to adequately estimate the expected quality of community tagging system contributors (provided that the contributors' behavior fits the proposed model).Practical relevance: The obtained results can be used in the development of systems based on coordinated efforts of community (primarily, community tagging systems). 

CUIDADOS BUCAIS EM PACIENTES VENTILADOS MECANICAMENTE: CONHECIMENTO DE ENFERMEIROS DE UM HOSPITAL ESCOLA

2018 ◽  
Vol 8 (4) ◽  
Author(s):  
Gérsica Sampaio Silva ◽  
Fernanda Alves Ferreira Gonçalves ◽  
Bárbara Ribeiro Miquelin Bueno ◽  
Georlucya Kátia Da Silva Ferreira ◽  
Ludmila Pinheiro Da Silva ◽  
...  
Keyword(s):  
Oral Hygiene ◽  
Oral Care ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Mechanically Ventilated ◽  
Mechanically Ventilated Patients ◽  
Complicating Factors ◽  
Materials Used ◽  
Ventilated Patients

Objetivo: Avaliar o conhecimento acerca dos cuidados bucais realizados por enfermeiros a pacientes ventilados mecanicamente. Método: Estudo transversal, realizado em um hospital escola de Goiânia/Goiás. A coleta de dados deu-se por meio de questionário estruturado. Resultados: Os enfermeiros conhecem as medidas recomendadas sobre higiene bucal. Os fatores dificultadores encontrados foram a falta de pessoal (21,7%), falta de tempo (16,7%) e trabalhos burocráticos (15%). Contudo ainda existem lacunas no que se refere a produtos e materiais utilizados na higiene bucal. Conclusão: As Lacunas e os fatores dificultadores sinalizados nesse estudo merecem reflexão, como forma de avaliar a qualidade do cuidado oferecido.Descritores: Biofilme; Higiene Bucal; Cuidados de enfermagem.ORAL CARE IN MECHANICALLY VENTILATED PATIENTS: KNOWLEDGE OF NURSES FROM A SCHOOL HOSPITALObjective: To evaluate the knowledge about oral care performed by nurses in mechanically ventilated patients. Methods: a cross-sectional study, conducted in a teaching hospital of Goiania/Goias. The data collection was performed by means of a structured questionnaire. Results: The nurses know the measures recommended on oral hygiene. The complicating factors found were the lack of personnel (21.7%), lack of time (16.7%) and work on tape (15%). However there are still gaps in relation to products and materials used in oral hygiene. Conclusion: The gaps and the factors complicating factors indicated in this study deserve consideration, as a means of evaluating the quality of care offered.Keywords: Biofilm; Oral hygiene; Nursing care.CUIDADO ORAL EN PACIENTES CON VENTILACIÓN MECÁNICA: EL CONOCIMIENTO DE LAS ENFERMERAS DEL HOSPITAL ESCUELAObjetivo: Evaluar el conocimiento sobre el cuidado bucal realizadas por enfermeras en pacientes ventilados mecánicamente. Métodos: Estudio transversal, realizado en un hospital de Goiania y Goias. La recolección de datos se realizó por medio de un cuestionario estructurado. Resultados: Las enfermeras saben las medidas recomendadas en la higiene bucal. Los factores encontrados fueron la falta de personal (21,7%), la falta de tiempo (16,7%) y trabajar en la cinta (15%). Sin embargo todavía hay lagunas en relación con los productos y los materiales utilizados en la higiene bucal. Conclusión: Las brechas y los factores factores indicados en este estudio merecen consideración, como medio de evaluar la calidad de la atención ofrecida.Palabras clave: Biofilme; Higiene Bucal; Atención de Enfermería.

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