Theoretical analysis of the fatigue life of fixture screws in osseointegrated dental implants

Int J Oral Maxillofac Implants. Spring 1992;7(1):26-33.


Metal fatigue failure of the gold screw used to retain a fixed prosthesis to Brånemark osseointegrated fixtures/abutments has been analyzed theoretically. Mechanical engineering principles show the importance of appropriate preload being applied through the gold screw to the gold cylinder and abutment. The significance of the screw design and necessity of applying the correct torque to achieve a long fatigue life for the screw are also described. The consequence of misalignment of a gold cylinder to an abutment is discussed.

MeSH terms

  • Dental Abutments*
  • Dental Implants*
  • Dental Stress Analysis*
  • Denture Design
  • Denture Retention / instrumentation*
  • Elasticity
  • Humans
  • Prosthesis Failure
  • Survival Analysis
  • Tensile Strength


  • Dental Implants