title: Correlation Between Micromotion and Gap Formation at the Implant-Abutment Interface.
abstract: OBJECTIVE
  This study aimed to correlate micromotion and gap measurements at the implant-abutment interface.
  
  
  METHODS
  A total of 10 implant-abutment assemblies were subjected to micromotion measurements under cyclic loading and subsequently quartered and inspected under a light microscope to measure vertical and horizontal gaps between implant and abutment. Statistical analysis was based on Pearson product-moment correlations (α = .05).
  
  
  RESULTS
  Micromotion varied from 8.03 μm to 100.32 μm, while horizontal gaps ranged from 8.72 μm to 59.93 μm and vertical gaps ranged from 3.93 μm to 30.82 μm. No significant correlations were found (P > .05).
  
  
  CONCLUSIONS
  Simplistic gap measurements at the implant-abutment interface are inadequate for predicting micromotion.
authors.forename: Tanja
authors.initials: T
authors.lastname: Grobecker-Karl
authors.forename: Matthias
authors.initials: M
authors.lastname: Karl
mesh_terms: D001696:Biomechanical Phenomena; D059605:Dental Implant-Abutment Design; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D066298:In Vitro Techniques; D008422:Materials Testing; D009038:Motion; D013499:Surface Properties