title: An evaluation of the clinical application of three different biodegradable osteosynthesis materials for the fixation of zygomatic fractures.
abstract: OBJECTIVE
  The aim of this prospective study was to compare the clinical handling of 3 different biodegradable osteosynthesis materials and to determine whether they can be used for the fixation of all types of zygomatic fractures.
  
  
  METHODS
  A total of 54 consecutive patients who presented with displaced fractures of the zygomatic bone between October 2001 and May 2003 were randomly allocated to 3 biodegradable material groups for the fixation of the fractures. A titanium fixation system was used as rescue osteosynthesis whenever biodegradable materials failed.
  
  
  RESULTS
  Seventy-one (75.5%) of 94 fracture sites were fixed with biodegradable osteosynthesis; 23 (24.5%) had to be fixed with titanium plates and screws. No statistically significant difference was found between the 3 biodegradable materials with regard to their suitability for zygomatic fracture fixation (P = .16). Nonstable fixation (n = 7) or the need to fix small fragments (n = 16) were the reasons for using the titanium fixation system as rescue osteosynthesis at these sites. Biodegradable materials were most frequently unfeasible for use at the infraorbital rim and in the zygomaticomaxillary/anterior sinus wall area.
  
  
  CONCLUSIONS
  It was possible to stabilize 3 of 4 zygomatic fractures with 1.5- or 1.7-mm biodegradable osteosynthesis. Insufficient fracture stabilization, especially at the infraorbital rim and the zygomaticomaxillary crest/anterior sinus wall, was the main reason to switch to titanium osteosynthesis. The biodegradable screw design is possibly too bulky for these particular bony structures.
authors.affiliation: Raniomaxillofacial and Oral Surgery Hospital, University of Vienna Medical School, Vienna, Austria. gert.wittwer@meduniwien.ac.at
authors.forename: Gert
authors.initials: G
authors.lastname: Wittwer
authors.forename: Wasiu Lanre
authors.initials: WL
authors.lastname: Adeyemo
authors.forename: Martin
authors.initials: M
authors.lastname: Voracek
authors.forename: Dritan
authors.initials: D
authors.lastname: Turhani
authors.forename: Rolf
authors.initials: R
authors.lastname: Ewers
authors.forename: Franz
authors.initials: F
authors.lastname: Watzinger
authors.forename: Georg
authors.initials: G
authors.lastname: Enislidis
mesh_terms: D020341:Absorbable Implants; D000293:Adolescent; D000328:Adult; D000368:Aged; D001860:Bone Plates; D001863:Bone Screws; D005260:Female; D005593:Fracture Fixation, Internal / Q000379:methods*; D006016:Glycolates; D006801:Humans; D019344:Lactic Acid; D008297:Male; D008875:Middle Aged; D011091:Polyesters; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers; D011446:Prospective Studies; D014025:Titanium; D015051:Zygomatic Fractures / Q000601:surgery*
chemical_list: D006016:Glycolates; D011091:Polyesters; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C033616:poly(lactide); D014025:Titanium