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Finite element analysis on pushing the molar backwards using invisible aligner with different migration displacement

100%

Zhang J. , Ma L. , Ren Y. , Zhou Y. , Wei R. , Rong Q.

Acta of Bioengineering and Biomechanics

2023

tom Vol. 25, no. 2

115--123

This paper examines the biomechanical mechanism behind the effect of the invisible aligner technique on tooth movement processes. Methods: To compare the effects of different target positions on tooth movement and the periodontal ligament (PDL), two kinds of aligners were designed to provide displacements of 0.2 mm (Model A) and 0.3 mm (Model B). Different displacements of the maxillary second molar were simulated using the finite element (FE) method. Results: The results of numerical simulations showed that the maximum stress was in the PDL of the distal surface and the palatal surface. The stress of the PDL in Model B was larger than Model A, with the displacement of the second molar 0.027 mm in Model A, by 44.9% lesser than that in Model B. Conclusions: The aligner that provided a displacement of 0.2 mm was more suitable for pushing the second molar backward in the initial stage. During the tooth movement processes, the displacement of the crown was larger than that of the root and the displacement decreased gradually from the crown to the root. In addition, the displacement and rotation of teeth during orthodontic treatment were measured and analysed.

Interrupted orthodontic force results in less root resorption than continuous force in human premolars as measured by microcomputed tomography

63%

Sawicka M. , Bedini R. , Wierzbicki P. M. , Pameijer C. H.

Folia Histochemica et Cytobiologica

2014

tom 52

nr 4

Biomechanical modelling of periodontal ligament behaviour under various mechanical loads

63%

Nyashin Y. I. , Nyashin M. Y.

Acta of Bioengineering and Biomechanics

2000

tom Vol. 2, nr 2

67-74

In this review paper, some results of biomechanical modelling of periodontal ligament behaviour, which were obtained by the authors, are discussed. The periodontal ligament behaviour is emphasized to result significantly from a kind of mechanical load acting on teeth. It is primarily determined by features of the periodontal ligament structure which were experimentally revealed by the authors. Moreover, from unified biomechanical grounds some problems were formulated and solved in which the teeth were considered to be loaded with functional, traumatic and orthodontic loads.

Differentiation potential of stem cells from human dental origin - promise for tissue engineering

51%

Kadar K. , Kiraly M. , Porcsalmy B. , Molnar B. , Racz G. Z. , Blazsek J. , Kallo K. , Szabo E. L. , Gera I. , Gerber G. , Varga G.

Journal of Physiology and Pharmacology. Supplement

2009

tom 60

nr 7