In difficult anatomic conditions in the oral cavity with total adentia two-layer prostheses are often used. However, a silicon lining is not always connected well with an acrylic basis. The aim of this work was to choose the optimal primer to improve the fixation of the silicon lining to the hard acrylic basis of a dental prosthesis. This primer was found to be the product of interaction between vinyltriethoxysilan and 1,6 hexamethylenediisocyocat (VHC). Application of VHC led to a 8-fold increase in the strength of fixation of the silicon lining to the acrylic basis.
The authors conducted an experimental study of the influence of samples of dental prostheses of Etacryl, an acrylic plastic manufactured by polymerization on a water bath (E-WB) or by MW polymerization (E-MW), on manifestations of short-term IgE-dependent bronchial asthma (EBA). Mice with EBA, to which E-WB or E-MW samples were implanted, were afterwards studied macro- and microscopically. It was found that E-MW implantation caused less prominent local inflammation than E-WB implantation. Bronchopulmonary lavage (BPL) cell composition did not change substantially, and eosinophils constituted the majority of infiltrated tissue cells, whose significant increase in number evidenced the development of experimental bronchial asthma in these mice; at the same time, there was no pronounced inflammation, which was evidenced by insignificant increase BPL lymphocytes in all the groups of sensitized animals.The levels of anti-OA (ovalbumin) serum IgE antibodies increased after intraperitoneal OA injection and increased abruptly after intranasal application, but this increase had no correlation with acrylic plastic implantation, with, conversely, had an immunodepressive effect.
The contents of the following substances were measured in the intact and inflamed temporary and permanent tooth pulp: the main fibroblast growth factor β; tumor necrosis factor α; annexin V, homocistein, osteoprotegerin, and soluble receptor activator of nuclear factor kappa B ligand. The study demonstrated a more pronounced cell response to chronic inflammation in temporary tooth pulp, which led to an increase in the content of all the proteins under study except annexin V. Chronic pulpitis in permanent teeth caused an increase in the content of proteins participating in osteoclast activation.
The use of scanning electron microscopy combined with electromagnetic resonance and measurement of mean distance of free microcrack extension makes it possible to objectively and scientifically evaluate the microstructure of polycrystal structural oxide ceramics at technical cycle stages.Consistence of parameters of the microstructure of polycrystal structural oxide ceramics and those of the enamel (dentin) of natural teeth will ensure durability and increase clinical efficacy of ceramic restoration systems.
The significance of F.R.P. in maxillary osteoplasty was studied. Dynamical changes of oral cavity local immunity parameters were compared in osteoplastic surgery and dental implantation procedure. Data were presented in medians and quartiles, because in immune response the form of parameter distribution differed from normal. Statistical analysis was made by nonparametric methods of evaluation, which are not effected by asymmetrical distribution. The study demonstrated high immunomodulating and regenerative properties of F.R.P. in osteoplastic surgery with implantation. This allows for wider indications to dental implantation, especially in patients with periodontitis, and improve treatment outcome.
Rehabilitation of patients with total loss of teeth is a complex problem of designing prostheses which would be adequate in functional, esthetic, and psychological regard. Significant or total loss of teeth occurs mostly in people aged 60 or more. Elderly age is the main peculiarity of these patients and causes serious problems in orthopedic treatment due to reduced adaptive capacity of their organism. The authors stress that rehabilitation of the elderly should, in the first place, include coping with negative attitude to their age, forming constructive positions in communication and attitude to the elderly age as culmination of life path. In taking care of these patients prophylactic family health examination is needed; correcting preventive programs directed towards reestablishment or partial compensation of functions of an aging organism are required.
Odontogenic infection favors progressing and deterioration of trigeminal neuralgia. This necessitates complex dental sanitation including treatment of periodontal diseases.
The analysis of indication and contra-indications to orthopedic treatment of dentition with use of dental implants, and also complication of implantological treatment with application of a method of expert estimations, in particular - method "Delfi", or a method of anonymous interrogation of the expert is carried out.
One of important directions of the development of modern orthodontia is studying of processes that determine reconstruction of the periodontal complex as a continuation of orthodontic treatment. Understanding these processes will allow clinicians to control and accelerate orthopedic treatment.