title: Biomechanical comparison of osteosynthesis with poly-L-lactic acid and titanium screw in intracapsular condylar fracture fixation: An experimental study.
abstract: The aim of this study was to compare the biomechanical stability of poly-L-lactic acid and titanium screws in the fixation of intracapsular condylar fractures, in 10 polyurethane hemimandibles.
  
  
  
  Artificial intracapsular fractures were created with a steel disk and electronic micromotor. The first group was fixed with 15 mm long self-tapping 2.0 mm system titanium screws and the second group was fixed with 15 mm long 2.4 mm bioresorbable screws. Linear loads of 25, 50, 75, 100 N was applied in anteroposterior direction to the hemimandibles and the data were transmitted directly from the load cell to a computer that shows emergent results of material characteristics under same forces as a graphic containing force and displacement.
  
  
  
  The results show that there were no significant differences between the two methods, with 25 N of loading. (P > 0,05) The difference became significant with a higher value of loading.
  
  
  
  The results suggest that treatment with a single resorbable screw is not functionally stable as a single titanium screw.
authors.forename: M M
authors.initials: MM
authors.lastname: Omezli
authors.forename: D
authors.initials: D
authors.lastname: Torul
authors.affiliation: Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ataturk University, 25240 Erzurum, Turkey.
authors.forename: M E
authors.initials: ME
authors.lastname: Polat
authors.forename: E
authors.initials: E
authors.lastname: Dayi
mesh_terms: D020341:Absorbable Implants; D001696:Biomechanical Phenomena; D001860:Bone Plates; D001863:Bone Screws; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D017102:Fracture Healing; D050723:Fractures, Bone; D006801:Humans; D066298:In Vitro Techniques; D008335:Mandibular Condyle / Q000293:injuries* / Q000503:physiopathology / Q000601:surgery; D008337:Mandibular Fractures / Q000503:physiopathology / Q000601:surgery*; D008422:Materials Testing; D011091:Polyesters; D014025:Titanium
chemical_list: D011091:Polyesters; C033616:poly(lactide); D014025:Titanium