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  • 4 -11 (85) 2025 - Sultanov Sh.R. - COMPARATIVE ANALYSIS OF THE ACCURACY OF FIT AND THE INFLUENCE OF MARGINAL GAP IN DIFFERENT TYPES OF ABUTMENTS

4 -11 (85) 2025 - Sultanov Sh.R. - COMPARATIVE ANALYSIS OF THE ACCURACY OF FIT AND THE INFLUENCE OF MARGINAL GAP IN DIFFERENT TYPES OF ABUTMENTS

COMPARATIVE ANALYSIS OF THE ACCURACY OF FIT AND THE INFLUENCE OF MARGINAL GAP IN DIFFERENT TYPES OF ABUTMENTS

Sultanov Sh.R. - Tajik State Medical University named after Abu Аli ibn Sinа

Resume

The hermetic sealing of the “implant–abutment–crown” system is one of the key factors determining the long-term durability and biological stability of implant-based treatment. Even minimal microgaps at the contact interface can lead to microleakage, bacterial colonization, and the development of inflammatory complications, including peri-implantitis. Objective. To evaluate the accuracy of the marginal fit of prosthetic constructions using various types of abutments based on cone-beam computed tomography (CBCT) data. Materials and Methods. The study included 90 patients, divided into three groups: straight abutments (n = 32), angled abutments (n = 30), and individual CAD/CAM abutments (n = 28). CBCT was performed with a slice thickness of 0.2 mm and a reconstruction step of 0.1 mm. The following parameters were analyzed: marginal gap thickness, frequency of microgaps (>0.3 mm), bone density (HU), marginal bone resorption after 12 months, and incidence of inflammatory complications. Results. The mean marginal gap was 0.28 mm for angled, 0.21 mm for straight, and 0.16 mm for individual abutments (p < 0.01). The frequency of microgaps was 18.3%, 9.4%, and 5.7%, respectively. Marginal bone resorption after 12 months occurred in 14.7%, 9.8%, and 6.2% of cases. The highest sealing performance and bone density (940 HU) were observed with individual CAD/CAM abutments. Conclusion. Individual CAD/CAM abutments provide the most precise marginal fit, the smallest marginal gap, and significantly reduce the risk of microleakage, inflammation, and marginal bone resorption. The use of CBCT in combination with digital technologies represents a reliable method for objectively assessing the precision of the prosthetic phase in implant dentistry.

Keywords: implantology, abutments, marginal gap, CBCT, CAD/CAM technology, osseointegration, microleakage, marginal bone resorption.

First page

17

Last page

24

For citation:Sultanov Sh.R. - COMPARATIVE ANALYSIS OF THE ACCURACY OF FIT AND THE INFLUENCE OF MARGINAL GAP IN DIFFERENT TYPES OF ABUTMENTS//New Day in Medicine 11(85)2025 17-24 https://newdayworldmedicine.com/en/new_day_medicine/11-85-2025

List of References

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