Influence of dental prostheses materials on the condition of oral mucosa local homeostasis

Abstract

Objective. To study the influence of base materials used in the manufacture of removable dentures on the immune homeostasis of the oral mucosa, and, as a consequence, on the clinical condition of the oral mucosa and periodontium of supporting teeth. To create fundamental principles for the development of a pathogenetically substantiated choice of basic dental materials of various chemical natures for removable prosthetics based on the analysis of the parameters of immune homeostasis of the oral mucosa.

Materials and methods. 154 patients aged 40 to 85 using dentures based on acrylic, polyurethane plastics and thermoplastics for 6 months, participated in the study. Indicators of immune homeostasis and the identified clinical manifestations of the influence of the prosthesis material such as chronic periodontitis and gingivitis were compared using the statistical method of conjugate multifield tables.

Results. The indicators CD4+/CD8+, CD11/CD303, CD68, CD204, CD163, Ki-67 phenotypic markers were determined in gingival biopsies of the prosthetic bed of patients using dentures based on acrylic, polyurethane and thermoplastic for 6 months. Analysis of the statistical significance of differences proved the influence of the prosthesis material on indicators of cellular immune homeostasis, with a shift of homeostasis towards the pro-inflammatory phenotype, and the suppression of the anti-inflammatory factor in circulating monocytes.

Conclusions. The study shows that, although each type of removable dentures has its own advantages and disadvantages, the response of the cellular immunity of the oral mucosa to polyurethane dentures is less than to acrylic and thermoplastic ones in relation to the control group. The use of polyurethane prostheses is reasonable as temporary ones during the healing stage of surgical interventions in the oral cavity, in particular tooth extraction and implantation. This type of prosthesis can be recommended as a permanent one for patients with a severe allergic reaction, especially to polymer compounds and dyes.

Keywords

Denture material / cellular immunity / immune homeostasis / oral mucosa / denture biopsies / phenotypic markers

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