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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
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Randomised study for the 1-year crestal bone maintenance around modified diameter implants with different loading

Matteo Danza1, Pietro Tortora, Alessandro Quaranta

  • 1Dental School Sapienza, University of Rome, Rome, Italy.

Clinical Oral Investigations
|July 16, 2009
PubMed
Summary

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Immediate versus conventional loading of modified diameter implants showed similar crestal bone maintenance. Mandibular implants exhibited slightly less bone loss with immediate loading, suggesting comparable outcomes for both loading protocols.

Area of Science:

  • Dental Implantology
  • Oral and Maxillofacial Surgery
  • Biomaterials Engineering

Background:

  • Crestal bone maintenance is crucial for long-term dental implant success.
  • Modified diameter internal hex implants with variable thread design and narrow neck are used in various clinical scenarios.
  • Different loading protocols (immediate vs. conventional) can influence peri-implant bone response.

Purpose of the Study:

  • To evaluate crestal bone maintenance around modified diameter internal hex implants.
  • To compare bone levels between immediately loaded and conventionally loaded implants.
  • To assess the influence of loading protocol on marginal bone loss in the maxilla and mandible.

Main Methods:

  • Standardized digitized periapical radiography was used for evaluation.

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  • Forty implants were placed in 25 patients, with 20 immediately loaded and 20 conventionally loaded.
  • Marginal bone levels were measured from the fixture-abutment junction to mesial and distal bone levels using specialized software.

    • Main Results:

    • At 1-year follow-up, no significant difference in marginal bone loss was observed between immediate and conventional loading in maxillary implants (p = 0.1031).
    • Slight significant differences were found in mandibular implants, with lower marginal bone loss in the immediately loaded group (p = 0.0141).
    • Overall, crestal bone maintenance was similar between the two loading protocols for modified diameter implants.

    Conclusions:

    • Both immediate and conventional loading protocols demonstrate comparable crestal bone maintenance around modified diameter internal hex implants.
    • The loading protocol may have a slight differential effect in the mandible, favoring immediate loading regarding marginal bone loss.
    • These findings support the use of both loading strategies with modified diameter implants, with careful consideration for mandibular placement.