Relative displacement resistance of standard and low-profile bone plates in experimental mandibular angle fractures

• Published in: Oral surgery, oral medicine, oral pathology, oral radiology and endodontics oral medicine, oral pathology, oral radiology and endodontics, 1997-04, Vol.83 (4), p.427-432
• Main Authors: Nissenbaum, Mark, Lownie, Madeline, Cleaton-Jones, Peter
• Format: Article
• Language: English
• Subjects: Animals; Biological and medical sciences; Bite Force; Bone Plates; Dentistry; Equipment Design; Fracture Fixation, Internal - instrumentation; Fractures, Ununited - physiopathology; Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics; Mandibular Fractures - surgery; Maxillofacial surgery. Dental surgery. Orthodontics; Medical sciences; Papio; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases; Titanium
• ISSN: 1079-2104; 1528-395X
• DOI: 10.1016/S1079-2104(97)90140-2

Objective. The purpose of the study was to compare the resistance to displacement of low-profile and standard titanium bone plates with an experimental mandibular angle fracture model. Study design. A jig was used to produce standard horizontally and vertically unfavorable mandibular angle fractures in 24 healthy baboon hemimandibles. Each hemimandible was immobilized with either a standard or a low-profile titanium bone plate with a Champy unicortical technique. The resistance to displacement was measured in a tensile-testing machine, and results were analyzed with a three-way analysis of variance. Results. Mean (SD) forces required to displace the fractures were standard plate 68.7 (22.8) kg and low-profile plate 46.5 (24.6) kg. Conclusions. The standard plates provided significantly more resistance to displacement, and 75% of the low-profile plates fractured through a screwhole.