title: Effect of different lateral occlusion schemes on peri-implant strain: A laboratory study.
abstract: OBJECTIVE
  This study aims to investigate the effects of four different lateral occlusion schemes and different excursions on peri-implant strains of a maxillary canine implant.
  
  
  METHODS
  Four metal crowns with different occlusion schemes were attached to an implant in the maxillary canine region of a resin model. The included schemes were canine-guided (CG) occlusion, group function (GF) occlusion, long centric (LC) occlusion, and implant-protected (IP) occlusion. Each crown was loaded in three sites that correspond to maximal intercuspation (MI), 1 mm excursion, and 2 mm excursion. A load of 140 N was applied on each site and was repeated 10 times. The peri-implant strain was recorded by a rosette strain gauge that was attached on the resin model buccal to the implant. For each loading condition, the maximum shear strain value was calculated.
  
  
  RESULTS
  The different schemes and excursive positions had impact on the peri-implant strains. At MI and 1 mm positions, the GF had the least strains, followed by IP, CG, and LC. At 2 mm, the least strains were associated with GF, followed by CG, LC, and IP. However, regardless of the occlusion scheme, as the excursion increases, a linear increase of peri-implant strains was detected.
  
  
  CONCLUSIONS
  The peri-implant strain is susceptible to occlusal factors. The eccentric location appears to be more influential on peri-implant strains than the occlusion scheme. Therefore, adopting an occlusion scheme that can reduce the occurrence of occlusal contacts laterally may be beneficial in reducing peri-implant strains.
authors.affiliation: Restorative Section, Melbourne Dental School, Melbourne University, Victoria, Australia.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Lo
authors.affiliation: Restorative Section, Melbourne Dental School, Melbourne University, Victoria, Australia.
authors.forename: Jaafar
authors.identifier: 0000-0003-3392-8641
authors.initials: J
authors.lastname: Abduo
authors.affiliation: Restorative Section, Melbourne Dental School, Melbourne University, Victoria, Australia.
authors.forename: Joseph
authors.initials: J
authors.lastname: Palamara
keywords: Canine guidance; Centric occlusion; Dental occlusion