Method for measuring and correcting the fit of fixed dental prostheses

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Abstract

BACKGROUND: One of the key indicators of the quality of fixed prostheses is their precise fit to the prosthetic bed. Errors occurring at clinical and laboratory stages during prosthesis fabrication often lead to variations in the degree of fit of the final prosthesis. Most existing methods for evaluating prosthesis fit are primarily of scientific interest and have not gained widespread clinical application due to their complexity and inconvenience in practical use.

AIM: To improve the effectiveness of prosthetic treatment by enhancing the fit of fixed dental prostheses.

MATERIALS AND METHODS: The fit of completed prostheses was assessed using a silicone test and a specialized device — a calibrator — which enables the clinician to quickly and accurately measure the thickness of the silicone film.

RESULTS: It was found that all prostheses received from the dental laboratory exhibited varying degrees of fit. The measured values ranged from 20 to 200 µm, with 50% of the prostheses exceeding 100 µm. Adjustments made to crowns using the proposed method improved their fit by an average of 59.28%.

CONCLUSION: The proposed clinical method for assessing and correcting the marginal fit of fixed dental prostheses allows clinicians to monitor this parameter effectively and achieve clinically acceptable values.

About the authors

Murad A. Muradov

Central Research Institute of Dentistry and Maxillofacial Surgery

Email: kemine160@mail.ru
ORCID iD: 0000-0003-1960-5715
SPIN-code: 3448-4866

MD, Cand. Sci. (Medicine)

Russian Federation, Moscow

Vladislav A. Erokhin

Samara State Medical University

Author for correspondence.
Email: vladalex.171097@mail.ru
ORCID iD: 0000-0003-1096-7568
SPIN-code: 4724-5883
Russian Federation, Samara

Alexander N. Ryakhovsky

Central Research Institute of Dentistry and Maxillofacial Surgery

Email: avantis2006@mail.ru
ORCID iD: 0000-0002-0308-126X
SPIN-code: 5774-4493

MD, Dr. Sci. (Medicine), Professor

Russian Federation, Moscow

Dmitry A. Trunin

Samara State Medical University

Email: trunin-027933@yandex.ru
ORCID iD: 0000-0002-7221-7976
SPIN-code: 5951-4659

MD, Dr. Sci. (Medicine), Professor

Russian Federation, Samara

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Supplementary files

Supplementary Files
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1. JATS XML
2. Fig. 1. Analyzer for measuring the thickness of silicone film. © Eco-Vector, 2025.

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3. Fig. 2. Silicone strip extracted from the analyzer. © Eco-Vector, 2025.

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4. Fig. 3. The markings of the compressed areas of the film were made with a fine pencil. © Eco-Vector, 2025.

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5. Fig. 4. Silicone film extracted from the crown before its adjustment. © Eco-Vector, 2025.

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6. Fig. 5. Adjustment of the inner surface of the crown. © Eco-Vector, 2025.

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7. Fig. 6. Silicone film extracted from the crown after its adjustment. © Eco-Vector, 2025.

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