Effect of bone loss simulation and periodontal splinting on bone strain Periodontal splints and bone strain

AbstractObjectivesThe 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.MethodsTen 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).ResultsStrains 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.ConclusionsBone loss increased strain mainly in the buccal region. Dental splints with adhesive system and composite resin produced lower bone strains irrespective of occlusal load