Strength characteristics of post-stump structures used to restore the crown part of teeth in a decompensated form of pathological abrasion

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Abstract

BACKGROUND: Pathological abrasion of hard dental tissues is quite common and can result in the partial or complete destruction of tooth crown, followed by disturbances in the entire dentoalveolar system. Such conditions are difficult to treat because both the esthetic component and functional usefulness must be restored, which is not always possible to achieve in the long term. Currently, various methods in dentistry are used to restore the lost crown part in patients with a decompensated form of pathological tooth abrasion by using various types of pins and pin structures, which do not always allow achieving positive long-term results because of failure and breakage during operation.

AIM: To assess the strength characteristics of various stump pin inlays and stump structures.

MATERIALS AND METHODS: Experimental studies of the strength characteristics of various types of stump pin structures were conducted. For this, 45 samples of stump pin structures were made for testing on a ZMGI 250-kp tensile testing machine.

RESULTS: Experimental results revealed the magnitude of the stress at which sample destruction occurs.

CONCLUSION: The study obtained information on the strength of various stump pin structures, which are important in tooth-preserving technologies.

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About the authors

Maksim M. Romanov

Kazan Federal University

Author for correspondence.
Email: rov.maks@mail.ru
ORCID iD: 0000-0001-7965-2770
SPIN-code: 1681-2229

Assistant Lecturer

Russian Federation, Kazan

Irek R. Khafizov

Kazan Federal University

Email: khafozovirek@mail.ru
ORCID iD: 0000-0003-4077-2788
SPIN-code: 9973-5280

Assistant Professor

Russian Federation, Kazan

Alfred M. Suleymanov

Kazan State University of Architecture and Engineering

Email: alfred-sulejmanov@yandex.ru
ORCID iD: 0000-0001-7376-8043
SPIN-code: 4703-0478

Dr. Sci. (Engin.), Professor

Russian Federation, Kazan

Ildar R. Khafizov

Kazan Federal University

Email: ildar.226@mail.ru
ORCID iD: 0000-0002-0195-5453
SPIN-code: 6385-4308

Research Associate

Russian Federation, Kazan

Rais G. Khafizov

Kazan Federal University

Email: implantstom@bk.ru
ORCID iD: 0000-0001-6578-6743
SPIN-code: 4041-9445

MD, Dr. Sci. (Med.), Professor

Russian Federation, Kazan

References

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  2. Khafizov RG, Azizova DA, Khafizova FA, et al. Sovremennye materialy i metody profilaktiki stomatologicheskikh zabolevanii. Kazan: Kazan Federal University; 2014. (In Russ).
  3. Burlo AV. Modern trends in the manufacture of post designs of dentures from various materials. Molodezhnyi innovatsionnyi vestnik. 2021;10(S1):379–382. (In Russ).
  4. Salnikov VN, Salnikov NV, Zhibylev EA. Izgotovlenie shtiftovykh kul’tevykh vkladok iz pressovoi keramiki. Bulletin of Medical Internet Conferences. 2015;5(10):1196. (In Russ).
  5. Razakov DK, Arutyunov EI. Sravnitel’naya kharakteristika primeneniya tsirkonievykh, metallicheskikh i kombinirovannykh shtiftovykh kul’tevykh vkladok pri lechenii perednei gruppy zubov verkhnei chelyusti. Bulletin of Medical Internet Conferences. 2019;9(7):305. (In Russ).
  6. Komlev SS, Kulikova ES. Methods of prevention of complications arising after orthopedic treatment of pinlays. International Research Journal. 2015;(3):86–87. (In Russ).
  7. Bragin EA, Skryl AV, Mrikaeva MR. The intense deformed condition roots of the teeth restored by different pin constructions. Kubanskii nauchnyi meditsinskii vestnik. 2013;(1):35–37. (In Russ).
  8. Skryl AV, Mrikaeva MR. The research on intense deformed condition of stump pin inserts. Vladikavkazskii mediko-biologicheskii vestnik. 2011;12(19):100–104. (In Russ).

Supplementary files

Supplementary Files
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2. Fig. 1. Model of the stump structure for experimental studies. 1 is the coronal part, 2 is the shock-absorbing root part, 3 is the pin root part

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3. Fig. 2. The stump part of the tooth, restored with an IKADENT fiberglass pin and Filtek light-curing material.

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4. Fig. 3. The stump part of the tooth, restored with a Forma LLC conical titanium pin and Filtek light-curing material.

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5. Fig. 4. The stump part of the tooth, restored with an IKADENT titanium pin (1.2 mm in diameter) and Filtek light-curing material.

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6. Fig. 5. CoCr+EMAX stump pin inlay.

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7. Fig. 6. EMAX stump pin inlay.

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8. Fig. 7. ZrO2 stump pin inlay.

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9. Fig. 8. NiCr stump pin inlay.

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10. Fig. 9. CoCr stump pin inlay.

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11. Fig. 10. NiTi stump pin inlay.

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12. Fig. 11. Stump pin inlay fixed in the root of the tooth.

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13. Fig. 12. Production of experimental samples for one of the groups of stump pin structures using a mold made of fluoroplastic material.

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14. Fig. 13. View of five samples of one of the groups of stump pin structures after being removed from the fluoroplastic mold.

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15. Fig. 14. Tensile machine ZMGI 250 kp. 1 is the handle for loading.

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16. Fig. 15. Test stand.

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17. Fig. 16. Scheme of the test stand. 1 — movable rod, 2 — fixing screw of the mounting hole in the fixed grip, 3 — sample of the stump pin inlay, fixed in the fixed grip, 4 — fixed grip for fastening the sample of the stump pin inlay, 5 — motion sensor.

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18. Fig. 17. Sample of the stump pin structure, installed in a fixed grip of the test stand.

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19. Fig. 18. Testing of stump pin structures on a tensile testing machine ZMGI 250 kp.

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20. Fig. 19. Ocular screw micrometer AM-9-2.

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21. Fig. 20. Measuring the fracture diameter of the root pin part of the stump structure using an ocular screw micrometer AM-9-2.

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22. Fig. 21. Sample of the stump pin structure. The arrow indicates the fracture site.

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23. Fig. 22. Strength characteristics of various stump structures.

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