DIGITAL METHOD OF COMPARATIVE EVALUATION OF THE RIGIDITY BETWEEN THE CUSTOM MADE BY THE AUTHORS IMPLANT IMPRESSION TRAYS AND STOCK IMPLANT IMPRESSION TRAYS WITH REMOVABLE PARTS

Roman Rozov; Vladimir Trezubov; Olga Spitsyna; Yulia Bistrova

doi:doi:10.18481/2077-7566-20-17-2-163-168

UDC 61

DIGITAL METHOD OF COMPARATIVE EVALUATION OF THE RIGIDITY BETWEEN THE CUSTOM MADE BY THE AUTHORS IMPLANT IMPRESSION TRAYS AND STOCK IMPLANT IMPRESSION TRAYS WITH REMOVABLE PARTS

Published в Actual problems in dentistry · Volume 17, Issue 2, 2021 · Pages 163–168 · Rubrics: ORTHOPEDIC DENTISTRY

DOI 10.18481/2077-7566-20-17-2-163-168

Received: 10.08.2021 Accepted: 12.08.2021 Published: 12.08.2021 Language of publication: RUS

Authors

Roman Rozov ¹ · Vladimir Trezubov ² · Olga Spitsyna ³ · Yulia Bistrova ⁴

1 First Saint Petersburg State Medical University named after I.I. acad. I.P. Pavlova (Department of Orthopedic Dentistry and Materials Science with a Course in Orthodontics, Professor of the Department)
, City Dental Clinic No. 33 (Chief Physician)
Saint Petersburg, St. Petersburg, Russian Federation

2 First Saint Petersburg State Medical University named after I.I. acad. I.P. Pavlova (Department of Prosthetic Dentistry and Materials Science with a Course in Orthodontics, Head of the Department)
Saint Petersburg, St. Petersburg, Russian Federation

3 Institute of Medical Education, Novgorod State University. Yaroslav the Wise (Department of Additional Education in Dental Specialties, Head of the Department)
Velikiy Novgorod, Veliky Novgorod, Russian Federation

4 First Saint Petersburg State Medical University named after I.I. acad. I. P. Pavlova (Department of Prosthetic Dentistry and Materials Science, Associate professor)
Saint Petersburg, St. Petersburg, Russian Federation

ABSTRACT

Impression taking procedure from prosthetic area in case of constructing implant supported prostheses is one of the most important steps in the process of patient rehabilitation especially in producing long span structures. Quality of the impression could affect the precision and passive fit of the prosthesis to the implants therefore the overall quality of the work. Obtaining digital impressions of edentulous jaws with a different number of implants using intraoral devices is still an unresolved problem in full. The ergonomics of the process of obtaining an impression is not easy due to the need to place both scan abutments in the oral cavity and manipulate the working part of the intraoral scanner around them. The accuracy of digital impressions obtained from edentulous jaws for obtaining full-arch implant supported prostheses does not exceed that when obtaining a classic impression, and according to a number of researchers, it is even lower. The aim of this study was to construct implant impression convertible trays with increased to the optimum levels of rigidity, with simple disassemble process and having an easy access to the adapters, and also to digitally compare the rigidity of the author’s impression trays. The method of assessment was digital technology of analysing structural resistance and inherent stresses and deformations using SolidWorks software. We performed analysis of the resistance of the structure to external loads. We have developed and created the customised copyrighted versions of the upper and lower impression trays made of rigid titanium alloy by 3D printing using DMLM technology on a Concept Laser device made of titanium Ti6-Al4-V. Modeling was carried out in the Mimics Medical 21 program (Materialize, Germany) along the contours on the data of cone-beam computed tomography. Performed digital tests reveal the underlying advantages of the designed by authors impression trays.

KEYWORDS

accuracy dental implants edentulous implant impressions impression tray open tray impression technique

Information References

Authors:

1. First Saint Petersburg State Medical University named after I.I. acad. I.P. Pavlova (Department of Orthopedic Dentistry and Materials Science with a Course in Orthodontics, Professor of the Department)

City Dental Clinic No. 33 (Chief Physician)

Saint Petersburg, St. Petersburg, Russian Federation

2. First Saint Petersburg State Medical University named after I.I. acad. I.P. Pavlova (Department of Prosthetic Dentistry and Materials Science with a Course in Orthodontics, Head of the Department)

Saint Petersburg, St. Petersburg, Russian Federation

3. Institute of Medical Education, Novgorod State University. Yaroslav the Wise (Department of Additional Education in Dental Specialties, Head of the Department)

Velikiy Novgorod, Veliky Novgorod, Russian Federation

4. First Saint Petersburg State Medical University named after I.I. acad. I. P. Pavlova (Department of Prosthetic Dentistry and Materials Science, Associate professor)

Saint Petersburg, St. Petersburg, Russian Federation

Type:

Article

Pages:

from 163 to 168

Status:

Published

Subject area:

UDC 61

Language:

Russian

Keywords:

accuracy, dental implants, edentulous, implant impressions, impression tray, open tray impression technique

References

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DIGITAL METHOD OF COMPARATIVE EVALUATION OF THE RIGIDITY BETWEEN THE CUSTOM MADE BY THE AUTHORS IMPLANT IMPRESSION TRAYS AND STOCK IMPLANT IMPRESSION TRAYS WITH REMOVABLE PARTS

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