PROSPECTS FOR MANUFACTURING FRAMES OF METAL CERAMIC STRUCTURES OF DENTAL PROSTHESES BY THE METHOD OF SELECTIVE LASER SINTERING

2021 ◽  
pp. 232-239
Author(s):  
Stepanov V.A. ◽  
Shemonaev V.I. ◽  
Buyanov E.A. ◽  
Grachev D.V. ◽  
Parchomenko A.N. ◽  
...  
Keyword(s):  
Objective Assessment ◽  
Selective Laser Sintering ◽  
Clinical Effectiveness ◽  
Study Groups ◽  
Laser Sintering ◽  
Dental Prostheses ◽  
Metal Ceramic ◽  
Abutment Teeth ◽  
Ceramic Crowns ◽  
Solid Tissues

The article presents the results of evaluating the prototyping of metal-ceramic structures made by casting and selective laser sintering. To achieve this goal, 27 patients with fabricated metal-ceramic crowns and bridgeworks were examined. Two study groups were created. The first group included 14 patients for whom dental prosthesis frameworks were made by casting. The second group consisted of 13 people, for whom the frames of dentures were made by the method of selective laser sintering. The analysis of clinical effectiveness was carried out according to the following criteria: 1- precision of the felling of prosthesis frame to solid tissues of abutment teeth; 2- the condition of the marginal periodontium; 3- the integrity of the ceramic cladding. The results of the study showed that the precision to solid tooth tissues of metal-ceramic dental prostheses made by laser selective sintering is higher than of frames made by casting. In accordance to the second criteria the best results were also shown by the participants of the second group. No chipping of the ceramic veneer from the metal-ceramic denture frameworks made by laser selective sintering was found. Thus, dentures which frameworks are made by the method of selective laser sintering are characterized by a higher objective assessment of their precision to the solid tissues of the abutment teeth. Lesions of the marginal periodontium both inflammatory and dystrophic were less in the participants of the second group. The frequency of defects in the coating of metal-ceramic dentures was significantly lower in the case of fabrication frameworks by laser selective sintering.

scholarly journals Orthopedic treatment with fixed dentures taking into account the distribution and causes of defects in dental hard tissues

Pathologia ◽  
2021 ◽  
Vol 18 (1) ◽  
pp. 112-116
Author(s):  
Yu. V. Klymiuk ◽  
Z. R. Ozhogan ◽  
L. V. Miziuk ◽  
V. M. Kryvanych ◽  
I. V. Yanishen
Keyword(s):  
Tooth Pulp ◽  
Filling Material ◽  
Orthopedic Treatment ◽  
Group I ◽  
Dental Hard Tissues ◽  
Hard Tissues ◽  
Metal Ceramic ◽  
Abutment Teeth ◽  
Ceramic Crowns ◽  
Group Ii

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.

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.

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