Evaluation of in vitro resistance of titanium and resorbable (poly- l - dl -lactic acid) fixation systems on the mandibular angle fracture

Evaluation of in vitro resistance of titanium and resorbable (poly- l - dl -lactic acid) fixation systems on the mandibular angle fracture

Abstract The purpose of this study was to compare, by mechanical in vitro testing, a 2.0-mm system made with poly- l - dl -lactide acid with an analogue titanium-based system. Mandible replicas were used as a substrate and uniformly sectioned on the left mandibular angle. The 4-hole plates were adap...

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Bibliographic Details
Published in:International journal of oral and maxillofacial surgery Vol. 40; no. 3; pp. 316 - 321
Main Authors: Bregagnolo, L.A, Bertelli, P.F, Ribeiro, M.C, Sverzut, C.E, Trivellato, A.E
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01-03-2011
Elsevier
Subjects:
Absorbable Implants
Biocompatible Materials - chemistry
Biological and medical sciences
Biomechanical Phenomena
Bone Plates
Bone Screws
Dental Arch - pathology
Dentistry
Equipment Failure
Fracture Fixation - instrumentation
Humans
Incisor - pathology
Injuries of the limb. Injuries of the spine
Internal Fixators
Lactic Acid - chemistry
Mandible - pathology
mandibular angle fracture
Mandibular Fractures - surgery
Materials Testing
Medical sciences
Models, Anatomic
Molar - pathology
Otorhinolaryngology. Stomatology
plate
Polyesters
Polymers - chemistry
Polyurethanes - chemistry
resistance
resorbable
screw
Stress, Mechanical
Surgery
titanium
Titanium - chemistry
Traumas. Diseases due to physical agents
plate
resorbable
mandibular angle fracture
titanium
resistance
screw
Mandible
Stomatology
Diseases of the osteoarticular system
Fracture
Trauma
In vitro
Plate
Resistance
Fixation
Treatment
Screw
Surgery
Titanium
Lactic acid
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Summary:Abstract The purpose of this study was to compare, by mechanical in vitro testing, a 2.0-mm system made with poly- l - dl -lactide acid with an analogue titanium-based system. Mandible replicas were used as a substrate and uniformly sectioned on the left mandibular angle. The 4-hole plates were adapted and stabilized passively in the same site in both groups using four screws, 6.0 mm long. During the resistance-to-load test, the force was applied perpendicular to the occlusal plane at three different points: first molar at the plated side; first molar at the contralateral side; and between the central incisors. At 1 mm of displacement, no statistically significant difference was found. At 2 mm displacement, a statistically significant difference was observed when an unfavourable fracture was simulated and the load was applied in the contralateral first molar and when a favourable fracture was simulated and the load was applied between the central incisors. At the failure displacement, a statistically significant difference was observed only when the favourable fracture was simulated and the load was applied on the first molar at the plated side. In conclusion, despite more failure, the poly- l - dl -lactic acid-based system was effective.
Bibliography:ObjectType-Article-1
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content type line 23
ISSN:0901-5027
1399-0020
DOI:10.1016/j.ijom.2010.10.004