Design of realistic chewing trajectory for dynamic analysis of the dental prosthesis

• Autorzy: Qin Wenlong , Cong Ming , Ren Xiang , Wen Haiying

Identyfikatory

DOI

10.37190/ABB-01581-2020-02

• Języki publikacji: EN

Abstrakty

EN

Purpose: The chewing trajectory in the dynamic analysis of dental prosthesis is always defined as a two-segmental straight polyline without enough consideration about chewing force and motion laws. The study was aimed to design a realistic human chewing trajectory for the dynamic analysis based on force and motion planning methods. Methods: The all-ceramic crown restored in the mandibular first molar was selected as the representative prosthesis. Firstly, a dynamic model containing two molar components and one flat food component was built, and an approximate chewing plane was predefined. According to the desired forces (25 N, 150 N and 25 N), three force planning points were calculated by using tentative trajectories. The motion planning was then executed based on four-segment cubic spline model. Finally, the new trajectory was re-imported into the dynamic model as the displacement load for evaluating its stress influence. Results: The maximum lateral velocity was 26.81 mm/s. Besides, the forces in the three force planning points were 14.11 N, 126.75 N and 13.56 N. The overall repetition rate of chewing force was 77.21%. The force and stress profiles were similar to the sine curve on the whole. The maximum dynamic stress of the crown prosthesis was 398.5 MPa. Conclusions: The motion law was effectively brought into the chewing trajectory to introduce the dynamic effect. The global force performance was acceptable, and the force profile was more realistic than the traditional chewing trajectory. The additional reliable characteristic feature of the stress distribution of the dental prosthesis was observed.

Słowa kluczowe

EN

dental prosthesis; chewing force; chewing trajectory; dynamic analysis

PL

proteza dentystyczna; siła żucia; trajektoria żucia; analiza dynamiczna

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2020
• Tom: Vol. 22, no. 3
• Strony: 77--84
• Opis fizyczny: Bibliogr. 17 poz., rys., wykr.

Twórcy

autor

Qin Wenlong

• School of Mechanical Engineering, Dalian University of Technology, Dalian, China

autor

Cong Ming

• School of Mechanical Engineering, Dalian University of Technology, Dalian, China

autor

Ren Xiang

• College of Stomatology, Dalian Medical University, No. 9 West Section Lvshun South Road, 116024, Dalian, China

autor

Wen Haiying

• School of Mechanical Engineering, Southeast University, Nanjing, China

Bibliografia

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