| Autor: |
Zieliński R; Department of Maxillofacial Surgery, Medical University of Lodz, 1st Haller Plac, 90-647 Lodz, Poland. bkost@op.pl., Kozakiewicz M; Department of Maxillofacial Surgery, Medical University of Lodz, 1st Haller Plac, 90-647 Lodz, Poland. qed@op.pl., Świniarski J; Department of Strength of Materials and Structures, Technical University of Lodz, Stefanowskiego 1/15, 90-924 Lodz, Poland. jacek.swiniarski@p.lodz.pl. |
| Jazyk: |
angličtina |
| Zdroj: |
Materials (Basel, Switzerland) [Materials (Basel)] 2019 Apr 03; Vol. 12 (7). Date of Electronic Publication: 2019 Apr 03. |
| DOI: |
10.3390/ma12071110 |
| Abstrakt: |
(1) Background: The main disadvantage of rigid fracture fixation is remain material after healing period. Implementation of resorbable plates prevents issues resulting from left plates. The aim of this study is to compare the usage of bioresorbable and titanium "A" shape condyle plate in condylar fractures. (2) Methods: Thickness of 1.0 mm, height of 31 mm, and width of 19 mm polylactic acid (PLLA) and titanium "A" shape plate with 2.0 mm-wide connecting bar and 9 holes were tested with finite element analysis in high right condylar neck fracture. (3) Results: On bone surface the highest stress is on the anterior bridge around first hole (approx. 100 MPa). The highest stress on screws is located in the first screw around plate in the anterior bridge and is greater in titanium (150 MPa) than PLLA (114 MPa). (4) Conclusion: Pressure on bone in PLLA osteosynthesis is two times higher than in titanium fixation. On small areas where pressure on bone is too high it causes local bone degradation around the fracture and may delay the healing process or make it impossible. Fixation by PLLA is such flexible that bone edges slide and twist what may lead to degradation of callus. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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