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Occlusal overload with dental implants: a review.

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The role of occlusal overload in peri-implantitis remains unclear, with clinical data linking parafunction to implant failure. Further research is needed to define patient-specific load thresholds for customized treatment plans.

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Area of Science:

  • Dental Implantology
  • Biomaterials Science
  • Biomechanics

Background:

  • The contribution of occlusal overload to peri-implantitis is debated.
  • Animal studies lack data on the biological threshold for peri-implant bone fatigue failure.
  • Clinical studies suggest a link between parafunction and implant failure, but outcomes vary due to load parameters and bone density.

Purpose of the Study:

  • To review the existing evidence on occlusal overload and peri-implantitis.
  • To highlight the need for evidence-based guidelines in prosthetic design.
  • To call for preclinical research to establish patient-specific load thresholds.

Main Methods:

  • Review of existing animal and clinical studies.
  • Analysis of factors influencing implant failure, including load intensity, frequency, and bone density.
  • Identification of gaps in current knowledge regarding engineering thresholds.

Main Results:

  • Current clinical guidelines for prosthetic design are often based on intuitive concerns about overload rather than robust evidence.
  • Higher crown-to-implant ratios, cantilever prostheses, and non-splinted designs have been cautiously avoided.
  • Existing evidence does not consistently support the avoidance of these designs due to overload concerns.

Conclusions:

  • There is a lack of specific engineering guidelines for clinicians regarding occlusal loads.
  • Preclinical research is essential to determine safe, patient-specific occlusal load thresholds.
  • Establishing these thresholds will enable customized treatment planning and potentially allow for more liberal prosthetic designs.