Steiner, T. and Raith, S. and Eichhorn, S. and Doebele, S. and Trainotti, S. and Mueller, S. and Eder, M. and Kovacs, L. and Burgkart, R. and Wolff, K. -D. and Hoelzle, F. (2012) Evaluation of a new optical measuring system for experiments on fractured human mandibles. CLINICAL ORAL INVESTIGATIONS, 16 (6). pp. 1535-1542. ISSN 1432-6981,
Full text not available from this repository. (Request a copy)Abstract
Objectives Biomechanical loading on human mandibles was performed and a new optical measurement device was introduced for the quantification of interfragmentary movement in fractured mandibles stabilized with different osteosynthesis systems. Materials and methods Comparison tests were performed with monocortical non-locking double plates and bicortical single locking plate. For the experiments on a specialized test bench, 18 ex vivo fractured human cadaveric mandibles were tested. Interfragmentary motion was detected in all three spatial dimensions using the optical measurement device PONTOSA (R). The movement was investigated over increasing incisal force and one summarized parameter was investigated. Results For the maximal tested load of 300 N m, the resultant interfragmentary movements in the two investigated groups were 2.96 +/- 1.85A degrees for the fixation with two conventional miniplates (six hole, profile 1.0 mm) and 4.53 A +/- 2.49A degrees for single bicortically fixed locking plates (four hole, profile 1.5 mm). For both plate systems, we used the 2.0 mm screw system. Conclusions The test bench in combination with the new optical device PONTOSA (R) can test the primary stability of osteosynthesis. We offer a solution to the problem of rate of twist of the mandible as well as typical rotational problem in recent measurements. Further, the method can be used for development of new osteosynthesis products. Clinical relevance Pseudoarthrosis formation is a common problem based on unsatisfying fixation of the fracture gap. The here presented combination of mechanical tests and numerical simulations can provide support for an improved treatment of fractured mandibles.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HUMAN MASTICATORY SYSTEM; 3-DIMENSIONAL MATHEMATICAL-MODEL; BITE FORCES; OSTEOSYNTHESIS; STABILITY; FIXATION; Mandible; Osteosynthesis; Finite element analysis; Experimental testing; 3D optical measurement; Biomechanics |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Mund-, Kiefer- und Gesichtschirurgie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 May 2020 05:31 |
| Last Modified: | 04 May 2020 05:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17708 |
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