In vitro study of a modified sagittal split osteotomy fixation technique of the mandible: a mechanical test
Autor: | S.A.Q. Miguens Júnior, Bruna Muhlinberg Vetromilla, A.N. Silva Júnior, A. Ozkomur, C.L. Sonego, O.L. Chagas Júnior, Livia Fernandes, Pedro Antônio Gonzáles Hernández, Miguel Angelo Ribeiro Scheffer |
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Rok vydání: | 2018 |
Předmět: |
Compressive Strength
medicine.medical_treatment Bone Screws Osteotomy Sagittal Split Ramus chemistry.chemical_element Sagittal split osteotomy In Vitro Techniques Mandibular first molar Fracture Fixation Internal 03 medical and health sciences Fixation (surgical) 0302 clinical medicine Mandibular Fractures Deformity medicine Premolar Humans Internal fixation Bicuspid Titanium Orthodontics Osteosynthesis business.industry 030206 dentistry Molar Jaw Fixation Techniques Biomechanical Phenomena Equipment Failure Analysis medicine.anatomical_structure Otorhinolaryngology chemistry 030220 oncology & carcinogenesis Surgery Stress Mechanical Oral Surgery medicine.symptom business Bone Plates |
Zdroj: | International Journal of Oral and Maxillofacial Surgery. 47:1330-1335 |
ISSN: | 0901-5027 |
Popis: | This study was performed to evaluate the compressive mechanical strength of rigid internal fixation (RIF) using 1.5-mm L-shaped plates fixed with monocortical screws in sagittal split osteotomy (SSO). Thirty synthetic hemimandibles, which had all undergone a 5-mm advancement, were divided into three groups: three 12-mm bicortical titanium screws were placed in an inverted L pattern in group A; one straight 2.0-mm system spaced titanium plate fixed with four 5-mm monocortical screws was used in group B; two 1.5-mm system L-shaped titanium plates, each fixed with four 5-mm monocortical screws, were used in group C. The models were subjected to compressive and progressive mechanical tests with forces applied in the area between the second premolar and first molar to verify resistance in Newtons (N). A displacement speed of 1mm/min was applied, with a maximum 10mm displacement of the distal segment or until disruption of the fixation. The deformity and/or eventual rupture of the plates were evaluated, and consequently their technical stability was determined. The results showed that the modified fixation technique tested in this study on synthetic mandibles resulted in adequate stability and superior mechanical behaviour compared to simulated osteosynthesis with the use of a straight 2.0-mm titanium plate. |
Databáze: | OpenAIRE |
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