Tver, Tver, Russian Federation
Tver, Tver, Russian Federation
Tver, Tver, Russian Federation
Tver, Tver, Russian Federation
UDK 616.314-76 Зубные мосты
GRNTI 76.29 Клиническая медицина
OKSO 31.00.00 Клиническая медицина
BBK 5 ЗДРАВООХРАНЕНИЕ. МЕДИЦИНСКИЕ НАУКИ
BISAC MED MEDICAL
The use of interim (provisional) prostheses is an obligate stage of modern dental practice. The problem of provisional bridges recognized by most experts is their use under heavy occlusal stress due to the possibility of their fracture. The development of a simple method of reinforcing provisional of prostheses during a clinical appointment that does not require special equipment is an urgent scientific and practical task. Objectives. The goal of this study was to evaluate the stress distribution in fiberglass reinforced and non-reinforced short-span and long-span provisional bridges according to different acrylic and bis-acrylic resin. Methodology. For this purpose, four finite element models were developed to reproduce the properties of prosthetic materials and hard dental tissues (Young’s modulus, Poisson’s ratio, hardness). Each model was subjected to a vertical load of 100 N applied to the middle of the bridge. Calculations were carried out in APM 3D Studio, and the results obtained were monitored in Ansys 12.2. The results obtained were displayed on the monitor screen, printed and analyzed. Results. Stress distribution pattern for an acrylic non-reinforced short-span bridge (model 1) showed the highest stress (4.2–5.2 n/mm2) in the area of the occlusal surface. Stress distribution pattern for an acrylic non-reinforced long-span bridge (model 2) showed the highest stress (11.4–12.3 n/mm2) both in the load zone and in the cervical zones of the connector facing the defect. Stress distribution pattern for acrylic reinforced long-span bridge (model 3) showed the highest stress (10.5–12.0 n/mm2) in the area where the fiber reinforcing tape is located deep in the bridge. Stress distribution pattern for bis-acrylic reinforced long-span bridge (model 4) showed the highest stress (9.8–10.5 n/mm2) observed both in the area where the glass fiber reinforcing tape is located and on the occlusal surface. Conclusion. Finite element analysis confirmed the feasibility of fiberglass reinforcement of long-span provisional bridges made of acrylic or bis-acrylic resin.
provisional bridges, acrylates, bis-acrylates, finite element method, stress distribution pattern
1. Sanz-Martín I, Encalada C, Sanz-Sánchez I, Aracil J, Sanz M. Soft tissue augmentation at immediate implants using a novel xenogeneic collagen matrix in conjunction with immediate provisional restorations: A prospective case series. Clin Implant Dent Relat Res. 2019;21(1):145-153. DOI:https://doi.org/10.1111/cid.12696. PMID: 30508313.
2. Yao JW, Wang HL. Assessment of Peri-implant Soft Tissue Adaptive Pressure and Time After Provisional Restorations. Int J Periodontics Restorative Dent. 2019;39(6):809-815. DOI:https://doi.org/10.11607/prd.4063. PMID: 31613941.
3. James Field 1, Robert Wassell //Br Dent J. 2023;234(11):805-809. doi:https://doi.org/10.1038/s41415-023-5974-7. Provisional restorations (Part 1) PMID: 37291303 DOI:https://doi.org/10.1038/s41415-023-5974-7
4. Psarri C, Kourtis S. Effect of fiber-reinforcement on the strength of polymer materials for provisional restorations: An in vitro study. J Esthet Restor Dent. 2020;32(4):433-440. DOI:https://doi.org/10.1111/jerd.12586 PMID: 32274901. DOI:https://doi.org/10.1111/jerd.12386
5. Hamza TA, Rosenstiel SF, Elhosary MM, Ibraheem RM. The effect of fiber reinforcement on the fracture toughness and flexural strength of provisional restorative resins. // J Prosthet Dent. 2004;91(3):258-64. DOI:https://doi.org/10.1016/j.prosdent.2004.01.005
6. Jurado CA, Barkmeier WW, Alshabib A, Alresayes SS, Fu CC, Teixeira EC, Baruth AG, Tsujimoto A. Effectiveness of Different Polishing Kits for Chairside CAD/CAM Provisional Restorative Materials. Oper Dent. 2022;47(6):670-677. DOI:https://doi.org/10.2341/21-147-L. PMID: 36279319.
7. Ahmad Abadi MN, Goharifar A, Mahabadi M. The effect of fabrication methods (conventional, computer-aided design/computer-aided manufacturing milling, three-dimensional printing) and material type on the fracture strength of provisional restorations. Dent Res J (Isfahan). 2023 Jul 25;20:86. eCollection 2023. PMID: 37674576.
8. Blasi A, Alnassar T, Chiche G. Injectable technique for direct provisional restoration. J Esthet Restor Dent. 2018;30(2):85-88. DOI:https://doi.org/10.1111/jerd.12333. PMID: 28929603.
9. Kozmacs C, Baumann V, Bunz O, Piwowarczyk A. Relative Clinical Success of Bis-Acryl Composite Provisional Crowns. Compend Contin Educ Dent. 2018 Jan;39(1):9-12. PMID: 29293015.
10. Askar OM, ELsyad MA. Fiber-Reinforced Hybrid Prosthesis Veneered With Composite Resin for 4 Implant-Supported Fixed Provisional and Definitive Restorations. J Oral Implantol. 2023 1;49(1):30-38. DOI:https://doi.org/10.1563/aaid-joi-D-21-00252. PMID: 35881823.
11. Petrikas, D.V. Trapeznikov, E.A. Zmeeva The laboratory study of the flexural strength of reinforced bis-acrylic material for provisional fixed restorations. Actual Problems in dentistry. 2018;14(4):121-125 (In Russ.)]. DOI:https://doi.org/10.18481/2077-7566-2018-14-4-121-125
