Effect of the angle of the screw on the stability of the mandibular sagittal split ramus osteotomy: a study in sheep mandibles

We compared the biomechanical stability of 60° and 90° angles for insertion of screws for fixation of sagittal split ramus osteotomies (SSROs) in 10 sheep mandibles in vitro. After 5mm advancements, the osteotomies were fixed with screws 2mm in diameter inserted with a torque control screwdriver at...

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Veröffentlicht in:British journal of oral & maxillofacial surgery 2001-08, Vol.39 (4), p.266-268
Hauptverfasser: Uckan, S., Schwimmer, A., Kummer, F., Greenberg, A.M.
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container_end_page 268
container_issue 4
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container_title British journal of oral & maxillofacial surgery
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creator Uckan, S.
Schwimmer, A.
Kummer, F.
Greenberg, A.M.
description We compared the biomechanical stability of 60° and 90° angles for insertion of screws for fixation of sagittal split ramus osteotomies (SSROs) in 10 sheep mandibles in vitro. After 5mm advancements, the osteotomies were fixed with screws 2mm in diameter inserted with a torque control screwdriver at either 60° or 90° to the long axis of bone, in a matched pair experimental design. All specimens were then loaded in a physiological manner and the load-displacement of the osteotomies was recorded. Data for resistance to movement were compared by a paired t -test. The mean (SD) resistance to movement for the 60° and 90° screw insertions was 63.4 (27.7) N/mm and 59 (22.3) N/mm respectively. There was no significant difference between the groups. This correlates with clinical findings.
doi_str_mv 10.1054/bjom.2000.0580
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ispartof British journal of oral & maxillofacial surgery, 2001-08, Vol.39 (4), p.266-268
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source MEDLINE; Elsevier ScienceDirect Journals
subjects Animals
Biological and medical sciences
Biomechanical Phenomena
Bone Screws
Dental Stress Analysis
Dentistry
Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics
Jaw Fixation Techniques - instrumentation
Mandible - surgery
Maxillofacial surgery. Dental surgery. Orthodontics
Medical sciences
Osteotomy - instrumentation
Osteotomy - methods
Sheep
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
title Effect of the angle of the screw on the stability of the mandibular sagittal split ramus osteotomy: a study in sheep mandibles
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