title: Effect of bone loss simulation and periodontal splinting on bone strain: Periodontal splints and bone strain.
abstract: OBJECTIVE
  The influence of bone loss and periodontal splinting on strains in supporting bone is still not well understood. The aim of this study was to analyse the effect of bone loss and periodontal splints on strains in an anterior mandible structure.
  
  
  METHODS
  Ten anterior mandible models were fabricated using polystyrene resin. Eighty human teeth were divided in 10 groups (right first premolar to left premolar) and embedded in simulated periodontal ligament. Strain gauges were attached to the buccal and lingual mandible surfaces. The models were sequentially tested for 7 conditions: no bone alterations and no splinting; 5mm of bone loss between canine teeth; bone loss associated with resin splint between canine teeth; bone loss with wire splint; bone loss with wire/resin splint; bone loss with extracoronal fibre-glass/resin splint; and bone loss with intracoronal fibre-glass/resin splint. Oblique loads (50, 100, and 150N) were applied on the teeth. Data were analysed using 3-way ANOVA and Scheffe's test (α=.05).
  
  
  RESULTS
  Strains on buccal surface were higher than on lingual surface. Bone loss resulted in strain increase at 100 and 150N loading. Dental splinting with resin resulted in strain values similar to the control levels.
  
  
  CONCLUSIONS
  Bone loss increased strain mainly in the buccal region. Dental splints with adhesive system and composite resin produced lower bone strains irrespective of occlusal load.
authors.affiliation: Department of Periodontology and Implantology, School of Dentistry, Federal University of Uberlândia, Minas Gerais, Brazil.
authors.forename: Priscilla Barbosa Ferreira
authors.initials: PB
authors.lastname: Soares
authors.forename: Alfredo Júlio
authors.initials: AJ
authors.lastname: Fernandes Neto
authors.forename: Denildo
authors.initials: D
authors.lastname: Magalhães
authors.forename: Antheunis
authors.initials: A
authors.lastname: Versluis
authors.forename: Carlos José
authors.initials: CJ
authors.lastname: Soares
mesh_terms: D016301:Alveolar Bone Loss / Q000503:physiopathology*; D000704:Analysis of Variance; D001696:Biomechanical Phenomena; D001732:Bite Force; D003188:Composite Resins; D001840:Dental Bonding; D003799:Dental Stress Analysis; D004867:Equipment Design; D005898:Glass; D006801:Humans; D008334:Mandible / Q000503:physiopathology*; D008953:Models, Anatomic; D009969:Orthodontic Wires; D010516:Periodontal Splints; D018709:Statistics, Nonparametric
chemical_list: D003188:Composite Resins; C009753:fiberglass