Search citation statements
Paper Sections
Citation Types
Year Published
Publication Types
Relationship
Authors
Journals
The aim of this work was to analyze the causes of complications of orthopedic treatment of dentition defects with metal-ceramic crowns and non-removable metal-ceramic bridges. Materials and methods. A total of 140 patients aged 34 to 49 years were examined during the work, who underwent the production of both single metal-ceramic crowns and non-removable metal-ceramic bridges. All patients were divided into 2 groups (70 patients each): the first one included patients with vital abutment teeth, the second one – with depulped. The abutment teeth had a different functional state – they were filled, had wedge-shaped defects or increased abrasion. Results. Orthopedic treatment showed that the manufacture of solid metal-ceramic crowns on dental teeth, which were filled more than 1 year ago, led to complications in 18 of 35 (51.4 %) patients in this group, which is insignificantly (P ˃ 0.05) by 17.2 % less than with similar prosthetics on depulped teeth. Regarding the manufacture of bridges, the trend of more complications in prosthetics on devital teeth persists, because in group I we had 20 (57.7 %) patients with complications, and in group II – 29 (82.9 %) cases, which is significantly different at the level of P < 0.05. In prosthetics of vital teeth, defects of hard tissues of which are replaced by filling material immediately before prosthetics, single crowns of complications occurred in 3 patients, i.e. in 8.6 %, which is insignificantly (P ˃ 0.05) less by 5.6 % than in group II where complications were found in 5 (14.2 %) people. Analysis of orthopedic treatment of patients with included defects of dentitions with metal-ceramic bridge prostheses revealed that when using filled teeth (filled for 1 year before prosthetics) in the case, when they were depulped, as abutment, complications were observed in 9 people, i.e. in 25.7 % of this group. This indicator insignificantly (P ˃ 0.05) exceeds the identical one from the first group (14.3 %) by 11.4 %, therefore, there is a tendency to reduce tooth resistance to negative external and internal factors, which has not acquired statistical significance. Conclusions. The study found that the frequency of complications that occur after prosthetics with fixed dentures depends on the condition of the tooth pulp, because the viable pulp provides metabolism, renewal of tooth cells and response to any damage. The need to replace fillings that were made more than 1 year ago to reduce the risk of secondary caries has been proven. Defects of hard tissues in the form of a wedge-shaped defect and the increased attrition do not increase frequency of complications in prosthetics by fixed dentures.
The aim of this work was to analyze the causes of complications of orthopedic treatment of dentition defects with metal-ceramic crowns and non-removable metal-ceramic bridges. Materials and methods. A total of 140 patients aged 34 to 49 years were examined during the work, who underwent the production of both single metal-ceramic crowns and non-removable metal-ceramic bridges. All patients were divided into 2 groups (70 patients each): the first one included patients with vital abutment teeth, the second one – with depulped. The abutment teeth had a different functional state – they were filled, had wedge-shaped defects or increased abrasion. Results. Orthopedic treatment showed that the manufacture of solid metal-ceramic crowns on dental teeth, which were filled more than 1 year ago, led to complications in 18 of 35 (51.4 %) patients in this group, which is insignificantly (P ˃ 0.05) by 17.2 % less than with similar prosthetics on depulped teeth. Regarding the manufacture of bridges, the trend of more complications in prosthetics on devital teeth persists, because in group I we had 20 (57.7 %) patients with complications, and in group II – 29 (82.9 %) cases, which is significantly different at the level of P < 0.05. In prosthetics of vital teeth, defects of hard tissues of which are replaced by filling material immediately before prosthetics, single crowns of complications occurred in 3 patients, i.e. in 8.6 %, which is insignificantly (P ˃ 0.05) less by 5.6 % than in group II where complications were found in 5 (14.2 %) people. Analysis of orthopedic treatment of patients with included defects of dentitions with metal-ceramic bridge prostheses revealed that when using filled teeth (filled for 1 year before prosthetics) in the case, when they were depulped, as abutment, complications were observed in 9 people, i.e. in 25.7 % of this group. This indicator insignificantly (P ˃ 0.05) exceeds the identical one from the first group (14.3 %) by 11.4 %, therefore, there is a tendency to reduce tooth resistance to negative external and internal factors, which has not acquired statistical significance. Conclusions. The study found that the frequency of complications that occur after prosthetics with fixed dentures depends on the condition of the tooth pulp, because the viable pulp provides metabolism, renewal of tooth cells and response to any damage. The need to replace fillings that were made more than 1 year ago to reduce the risk of secondary caries has been proven. Defects of hard tissues in the form of a wedge-shaped defect and the increased attrition do not increase frequency of complications in prosthetics by fixed dentures.
The urgent task of orthopedic dentistry is the timely and optimal restoration of chewing efficiency, with the creation of new and improvement of existing structural materials, optimization of the use of consumables and improvement of the clinical and technological stages of the manufacture of removable orthopedic structures. The purpose of our study was a comparative assessment of the physical and mechanical properties of cast plastic material for the manufacture of bases of combined removable orthopedic structures using an improved method. We have developed a new domestic material for the manufacture of the bases of removable dentures using foundry compression pressing technology. The following parameters of the study of physical and mechanical properties of plastics were taken into account: material Shore hardness, material consistency, relative deformation during compression, sorption, impact strength, bending stress, tensile strength, abrasion resistance, percentage of residual monomer. The comparative characterization of the physical and mechanical properties of cold polymerization acrylic plastics showed that domestic cold-cured base plastic for casting compression molding is not inferior to the foreign base in terms of its main indicators cold-hardening plastic differs from the analog cold-hardening base plastic by a harder and harder consistency, which makes it possible to more effectively use the material for combined bases of removable dentures. The obtained data indicate that, in general, the domestic material with its physical and mechanical properties meets the requirements for this class of dental materials. Keywords: orthopedic treatment, physical and mechanical properties, cast plastic material, method of compression pressing.
Background. The question of distribution of masticatory pressure is one of the main branches in qualitive manufacturing of removable constructions. With the development of software, as well as with the increase in the power of computer technology has also spread to the problems of biomechanics, in particular the biomechanics of the human oral cavity. The aim of our study was to analyze the results of using the method of finite element techniques with the purpose to improve the quality of prosthetic treatment by correct modeling constructional denture elements. Materials and Methods. The study involved 45 patients aged 44–73 years (mean age 59.2±4.3) treated with complete laminar prosthetic constructions for the upper jaw and lower jaw. A powerful method was developed to solve the problems of the theory of elasticity – the finite element method. The main idea is that the body under the study is divided into a finite number of subdomains or elements on which the desired continuous function is approximated by a polynomial (consists of piecewise continuous functions). A two-dimensional quadrangular element with four nodes was chosen as the partition element. Dividing it into elements and further solving the problem was in the ANSYS Mechanical APDL package (USA). Results. Regarding the calibration of the ultimate displacements of nodal points and as a result of the distribution of masticatory pressure under the basis of a complete removable dentures on the tissues of the prosthetic area, the average values of each plane were as follows: for section PM1 – the plane with high pressure was ([675298.14±5.21] m2K). Taking the PM2 region, the values were slightly higher ([369743.3±3.9] m2K) and ([735356.34±4.52] m2K), respectively. Conclusions. Our findings suggest direct relationship between the using of mathematical calculation of material volume, volume deformation, potential data and elasticity theory as auxiliary element in the manufacture of removable dentures and, as a result, direct influence on level of quality of following constructions. Keywords: orthopedic treatment, finite element method, complete removable dentures, tension theory, deformation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.