ABSTRACT Objective: Periodontitis and peri-implantitis are the irreversible destructive diseases of the periodontal and peri-implant tissues. The present study aimed to determine the receptor expressions of Peroxisome proliferative-activated receptor (PPAR)-γ, Retinoid X receptor (RXR)-α, and Vitamin D receptor (VDR) in the diseased tissues around teeth and dental implants. Methods: The study consisted of three groups as group 1; healthy controls (C, n=15), group 2; periodontitis patients with stage 3 grade B (P, n=15), and group 3; peri-implantitis patients (PI, n=15). Periodontal clinical parameters as the plaque index (PI), gingival index (GI) and clinical attachment levels (CAL) were recorded. Gingival biopsies were obtained from all participants and biopsy samples underwent histological tissue processing. Hematoxylin-eosin (H\&E) and immunohistochemistry staining were performed. Total inflammatory cell counts and fibroblast cell density were evaluated on H\&E-stained slides while PPAR-γ, RXR-α, and VDR were evaluated via immunohistochemistry.
Study Type
OBSERVATIONAL
Enrollment
45
Gingival biopsies were obtained from all participants and biopsy samples underwent histological tissue processing.
Gaziosmanpasa University
Tokat Province, Turkey (Türkiye)
Inflammatory cells counts
Gingival biopsies were obtained from all participants and biopsy samples underwent histological tissue processing. Hematoxylin-eosin (H\&E) staining were performed. Total inflammatory cell counts density were evaluated on H\&E-stained slides.A cell counting frame of 10.000 µm2 area was selected under 1000x magnification. The total inflammatory cells (neutrophil, lymphocyte, eosinophil, and macrophage cells) within the frame were counted as inflammatory cell counting.
Time frame: 6 months
Fibroblast counts
Fibroblasts counts were evaluated from H\&E stained slides under 1000x magnification via a light microscope (Nikon Eclipse, E 600, Tokyo, Japan).
Time frame: 6 months
Peroxisome proliferative-activated receptor (PPAR)-γ
Gingival biopsies were obtained from all participants and biopsy samples underwent histological tissue processin and immunohistochemistry staining were performed, PPAR-γ, was evaluated via immunohistochemistry. Samples were examined under 400x magnification using light microscopy (Nikon Eclipse, E 600, Tokyo, Japan).
Time frame: During histological processing
Retinoid X receptor (RXR)-α
Gingival biopsies were obtained from all participants and biopsy samples underwent histological tissue processing and immunohistochemistry staining were performed, RXR-α was evaluated via immunohistochemistry. Samples were examined under 400x magnification using light microscopy (Nikon Eclipse, E 600, Tokyo, Japan).
Time frame: 6 months
Vitamin D receptor (VDR)
. Gingival biopsies were obtained from all participants and biopsy samples underwent histological tissue processing and immunohistochemistry staining were performed, VDR was evaluated via immunohistochemistry. Samples were examined under 400x magnification using light microscopy (Nikon Eclipse, E 600, Tokyo, Japan).
Time frame: 6 months
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