[Fractures of the edentulous atrophic mandible. Fracture management and complications].

Abteilung für Kiefer- und Gesichtschirurgie, Universitätsklinik für Wiederherstellende Chirurgie, Kantonsspital Basel, Spitalstrasse 21, CH-4031 Basel, Schweiz.
Mund- Kiefer- und Gesichtschirurgie 08/2001; 5(4):227-32.
Source: PubMed

ABSTRACT BACKGROUND: With increasing atrophy, fractures of the edentulous mandible tend to have a higher incidence of nonunion. However, the connection between disturbances of bony consolidation and inadequate primary stability is often insufficiently discussed. FIXATION: Rigid internal fixation with 2.7 or now 2.4 AO compression and reconstruction plates is a safe procedure to achieve short-term rehabilitation in the mostly elderly patients by ensuring immediate function without intermaxillary fixation. With increasing atrophy, our concept suggests the use of stronger plates and fixation of screws in safe bony regions far from the fracture site. RESULTS AND DISCUSSION: This study reports the results of treatment of 40 fractures of the edentulous mandible in 25 patients from 1979 until 1996: 38 fractures (95%) showed primary healing, and only 1 nonunion was revealed after fracture of the plate. The criteria for choice of plates are discussed as well as fracture exposure and the question of primary and secondary bone grafting.

  • [Show abstract] [Hide abstract]
    ABSTRACT: Mandibular fracture, specifically in the symphysis and body regions combined, is the most common facial fracture requiring hospitalization in North America. The primary treatment objective is to restore form and function by achieving anatomic reduction and placing fixation that eliminates mobility of the bone fragments. Several treatment options and surgical techniques are available for performing closed or open reduction. Special considerations are necessary when treating pediatric patients and fractures of the edentulous mandible. Complications relating to the tooth and denture-bearing regions of the mandible include infection, nonunion, and neurosensory changes.
    Oral and maxillofacial surgery clinics of North America 09/2013;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The objective of the present study was to conduct a computational, laboratory-based comparison of the biomechanical stability of 2.0 fixation locking plates with different profiles in Class III atrophic mandibular fractures using 3-dimensional finite element analysis. Three-dimensional finite element models simulating Class III atrophic mandibular fractures were constructed. The models were divided into 4 groups according to plate thickness (1.0, 1.5, 2.0, and 2.5 mm). Fractures were simulated in left mandibular bodies, and 3 locking screws were used on each side of each fracture for fixation. Bite forces of approximately 63 N were simulated in the incisor and molar regions of the mandibles in finite element models. The level of compressive strain on the bone around the screw was within the physiological limit. No significant difference was observed in the displacement of bone segments in the fracture region. Von Mises stress was higher during simulated bites in the molar region for plates with thicknesses of 1.0 mm. Plate tension values were below the level required for permanent deformation or fracture in all models. The 2.5-mm-thick plate presented better biomechanical performance than all other plates. The 2.0-mm-thick plate also showed satisfactory results and adequate safety limits. Large-profile (2.0-mm-thick) locking plates showed better biomechanical performance than did 1.0- and 1.5-mm-thick plates and can be considered an alternative reconstruction plate for the treatment of Class III atrophic mandibular fractures.
    Journal of oral and maxillofacial surgery: official journal of the American Association of Oral and Maxillofacial Surgeons 02/2013; 71(2):335-42. · 1.58 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: An algorithm for the treatment of noncondylar mandibular fractures is presented based on outcomes from studies that have been performed during the past 30 years. It is designed to assist clinicians in formulating a treatment plan that can be expected to provide the patient with a predictable outcome.
    Journal of oral and maxillofacial surgery: official journal of the American Association of Oral and Maxillofacial Surgeons 12/2013; · 1.58 Impact Factor