127 -10 (84) 2025 - Sultanov Sh.R. - EVALUATION OF THE MARGINAL FIT OF PROSTHETIC CONSTRUCTIONS IN THE “IMPLANT–CROWN” SYSTEM BASED ON CONE-BEAM COMPUTED TOMOGRAPHY (CBCT) DATA

EVALUATION OF THE MARGINAL FIT OF PROSTHETIC CONSTRUCTIONS IN THE “IMPLANT–CROWN” SYSTEM BASED ON CONE-BEAM COMPUTED TOMOGRAPHY (CBCT) DATA

Sultanov Sh.R. - Tajik State Medical University named after Abuali ibn Sino, Republic of Tajikistan

Resume

Modern implantology has achieved a high level of predictability; however, the long-term success of treatment depends not only on osseointegration but also on the precision of the marginal fit within the “implant–crown” system. Even minimal microgaps at the abutment–crown interface promote microleakage, bacterial colonization, and the development of inflammatory complications. Objective: To evaluate the accuracy of the marginal fit of prosthetic constructions in the “implant–crown” system using cone-beam computed tomography (CBCT) and to determine its impact on osseointegration stability and the risk of inflammatory complications. Materials and Methods: The study involved 78 patients divided into two groups: temporary (n = 38) and permanent (n = 40) prosthetic restorations. CBCT was performed with a slice thickness of 0.2 mm and reconstruction step of 0.1 mm. The following parameters were analyzed: marginal gap thickness (mm), frequency of microgaps (>0.3 mm), bone density (HU), contact area (mm²), and marginal bone resorption (%) after 12 months. Statistical analysis was performed using the Student’s t-test at a significance level of p < 0.05. Results: The average marginal gap was 0.27 ± 0.05 mm in the temporary group and 0.18 ± 0.04 mm in the permanent group (p < 0.01). The frequency of microgaps and inflammatory complications was 2–3 times higher in temporary prostheses. Bone density and contact area were significantly greater in the permanent restoration group, indicating superior osseointegration and marginal sealing. Conclusion: Permanent prosthetic restorations demonstrate a more precise marginal fit and greater osseointegration stability compared to temporary ones. The use of CBCT control and CAD/CAM technologies ensures objective assessment of marginal adaptation and helps prevent peri-implant inflammatory complications.

Keywords: dental implantation, marginal fit, CBCT, CAD/CAM abutments, osseointegration, microleakage, marginal bone resorption.

First page

727

Last page

733

For citation:Sultanov Sh.R. - EVALUATION OF THE MARGINAL FIT OF PROSTHETIC CONSTRUCTIONS IN THE “IMPLANT–CROWN” SYSTEM BASED ON CONE-BEAM COMPUTED TOMOGRAPHY (CBCT) DATA//New Day in Medicine 10(84)2025 727-733 https://newdayworldmedicine.com/en/new_day_medicine/10-84-2025

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