In vitro resistance of titanium and resorbable (poly l-co-dl lactic acid) osteosynthesis in mandibular body fracture
| Autor: | Claudio Ferreira Nóia, M. de Moraes, Henrique Duque de Miranda Chaves Netto, Renato Mazzonetto, Sergio Olate, Jaime Rodriguez-Chessa |
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| Rok vydání: | 2014 |
| Předmět: |
Models
Anatomic musculoskeletal diseases Polymers Polyesters Bone Screws Dentistry In Vitro Techniques Osseointegration Fracture Fixation Internal Mandibular Fractures Absorbable Implants Materials Testing Bone plate Premolar Humans Medicine Displacement (orthopedic surgery) Maxillary central incisor Lactic Acid Titanium Universal testing machine Osteosynthesis business.industry Mandible Fracture musculoskeletal system medicine.anatomical_structure Otorhinolaryngology Surgery Stress Mechanical Oral Surgery business Bone Plates |
| Zdroj: | International Journal of Oral and Maxillofacial Surgery. 43:362-366 |
| ISSN: | 0901-5027 |
| DOI: | 10.1016/j.ijom.2013.09.001 |
| Popis: | This study was a comparative evaluation of the bending resistance of metallic and resorbable plates and screws in a mandibular body fracture model. Forty polyurethane synthetic hemimandibles were used; a vertical linear cut was made between the second and first premolars. These 40 hemimandibles were divided into four groups of 10 and were fixed with titanium plates and screws or resorbable plates and screws, with monocortical screws in the upper sector and bicortical screws in the lower sector. Bending resistance tests were done on a universal testing machine with a linear displacement speed of 1mm/min, a cell load of 500 N, and a load cell on the lower central incisor or on the lower second premolar. Results were analyzed using the Student's t-test, with the significance level set at 5%. No statistically significant differences were observed between the groups studied, either in the analysis of the osteosynthesis materials or related to the load-bearing points. The variables of displacement and peak load did not present any significant differences. In this in vitro model of a mandibular body fracture, the mechanical behaviour of a resorbable osteosynthesis was similar to that of a titanium osteosynthesis. |
| Databáze: | OpenAIRE |
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