RU-2861554-C1 - METHOD FOR INTRAORAL SCANNING OF JAWS WITH PARTIAL OR COMPLETE TOOTH LOSS USING INSTALLATION OF INTRAOSSEOUS MINI-SCREWS

RU2861554C1RU 2861554 C1RU2861554 C1RU 2861554C1RU-2861554-C1

Abstract

FIELD: medicine; orthopaedic dentistry. SUBSTANCE: invention can be used in the treatment of partial or complete adentia of the upper or lower jaw with significant atrophy of the alveolar process. Temporary titanium mini-screws are installed transgingivally into the bone tissue under local anaesthesia in the projection of the missing teeth within a radius of 15 mm from the projection on the gum of the exit of the dental implants. Scan bodies are placed on the dental implants. Performing intraoral scanning with rocking movements after preliminary drying of the areas of interest with an air jet. EFFECT: increasing the accuracy of transferring the spatial position of implants and reducing scanning time, which makes it possible to reduce prosthetic errors associated with incorrect transfer of information about implants, accelerate rehabilitation and increase patient comfort by creating stable landmarks in the form of mini-screws on edentulous areas with significant atrophy of the alveolar processes. 1 cl, 2 dwg, 2 ex

Inventors

Khabirov Emil Kamilevich
Khabirov Kamil Anziapovich
Saleeva Gulshat Taufikovna
Saleev Rinat Akhmedullovich
Shakirova Liaisan Rinatovna
Shakirov Eduard Iurevich
Saleev Nail Rinatovich

Dates

Publication Date: 20260505
Application Date: 20250626

Claims (1)

A method for intraoral scanning of jaws with partial or complete loss of teeth using the installation of intraosseous mini-screws, including antiseptic treatment under local anesthesia, characterized in that temporary titanium mini-screws are transgingivally installed into the bone tissue under local anesthesia in the projection of the missing teeth within a radius of 15 mm from the projection of the exit of the dental implants onto the gum, a scan body is installed on the dental implants, and intraoral scanning is performed using rocking movements with preliminary drying of the areas of interest with a stream of air.

Description

The invention relates to the field of medicine, namely to orthopedic dentistry, and can be used in the treatment of such pathological conditions as partial or complete adentia of the upper or lower jaw with significant atrophy of the alveolar process. Modern dentistry, particularly in the field of orthopedic practice, actively utilizes digital technologies to diagnose and treat conditions such as partial and complete edentia. Innovative approaches, including CAD/CAM systems, have significantly simplified the design and manufacturing processes of dentures, increasing their precision and effectiveness. A key tool in digital dentistry are intraoral scanners, which provide highly accurate visualization of the anatomical structures of the oral cavity. These devices perform direct digital measurements of teeth and soft tissues, creating a 3D model of the examined area. The resulting data, including tooth relief, gingival contours, occlusal contacts, and opposing teeth, is processed by software for analysis, editing, and integration into subsequent treatment protocols. Three-dimensional models are created by combining multiple two-dimensional images, which are converted into a point cloud describing the object's geometry. The accuracy of the process depends on the presence of characteristic relief features, as they allow for reliable linking of the images. However, when scanning areas with a monotonous relief, such as the mucosa of an edentulous jaw, deviations in the reproduction of sizes and shapes are possible. Moreover, linear movement of the scanner along the scanned area sometimes causes cumulative errors, especially during lengthy or complex procedures. Even greater difficulties arise due to dynamic factors such as movements of the tongue, cheeks and soft tissues, which are especially pronounced in cases of significant atrophy of the alveolar processes of the jaws, which can lead to a dramatic decrease in scanning accuracy. Various methods for reducing errors when scanning edentulous jaw areas can be found in the literature. One such method is a method using modified elongated scanbodies to more accurately convey information about the position of implants (Huang R, Liu Y, Huang B, Zhang C, Chen Z, Li Z. Improved scanning accuracy with newly designed scan bodies: An in vitro study comparing digital versus conventional impression techniques for complete-arch implant rehabilitation. Clin Oral Impl Res. 2020; 31: 625-633. https://doi.org/10.1111/clr.13598). These elongated elements are positioned in such a way as to minimize the scanned distance along the soft tissues between the implants, which reduces the likelihood of data distortion. However, this technique requires the purchase of expensive scanbodies for each implant system, and in some cases such components may not be available on the market. In addition, the lack of stabilization of the mobile mucosa can negatively affect the quality of the scan. Another method used is splinting of implant-supported superstructures. In this method, intraoral markers (scanbodies) used to indicate the implant positions are connected with dental floss coated with pattern rubber or a light- or chemically cured composite material. The resulting structure is then cut to relieve post-polymerization stress and reconnected with pattern rubber. The connected implants are then scanned or, if necessary, removed and sent for laboratory scanning using a more accurate scanner. However, this method requires a high level of manual training, numerous consumables, significant time investment, and the availability of either an accurate intraoral or laboratory scanner. Another way to improve scanning accuracy is to use designs based on the patient's complete or partial removable denture to create a surface relief between the implants (Pan, Y., Tsoi, J. K. H., Lam, W. Y. H., Zhao, K., & Pow, E. H. N. (2021). Improving intraoral implant scanning with a novel auxiliary device: An in-vitro study. Clinical Oral Implants Research, 32, 1466–1473. https://doi.org/10.1111/clr.13847). Holes corresponding to the diameter of the scanbodies installed on the implants are made in the patient's denture or its plastic replica. The design is fixed to the jaw using the denture bed, then the scanbodies are installed, and the entire system is scanned with an intraoral scanner. This method improves scanning accuracy thanks to the relief landmarks provided by artificial teeth on the prosthesis, and also facilitates the reproduction of the patient's bite. The main disadvantages are the need for a prosthesis, the risk of damage if a replica cannot be made, and the possibility that scanbodies with a smaller height may not be visible during scanning. Each of the methods described above has proven its effectiveness and is actively used in daily dental appointments; however, they all have disadvantages that prevent their use in cases of significant atrophy of the alveolar process. The objective of the invention is to c