Clinical Oral Investigations

, Volume 14, Issue 4, pp 417–426 | Cite as

Randomised study for the 1-year crestal bone maintenance around modified diameter implants with different loading protocols: a radiographic evaluation

  • Matteo Danza
  • Pietro Tortora
  • Alessandro Quaranta
  • Vittoria Perrotti
  • Iole Vozza
  • Adriano PiattelliEmail author
Original Article


This study evaluated by standardised digitised periapical radiography the crestal bone maintenance around modified diameter internal hex implants with variable thread design and narrow neck loaded with different procedures. Forty implants were placed in 25 patients. Twenty implants were conventionally loaded, 20 ones immediately loaded. Radiographs were taken with a customised bite record and processed with software. Measurements of bone from the fixture–abutment junction to mesial and distal marginal bone levels were made. Student’s t test statistical analysis was adopted. Baseline data were variable; at 1-year follow-up, there were no significant differences for marginal bone loss between immediately and conventionally loaded maxillary implants (p = 0.1031), whilst there were slight significant differences between immediately and conventionally loaded implants in the mandible (p = 0.0141). Crestal bone maintenance around conventionally and immediately loaded modified diameter implants was similar, with slight significant differences in mandible where a lower marginal bone loss was observed.


Bone maintenance Diagnostic imaging Dental implants Radiograph Randomised study Loading protocols 


Conflict of interest

The authors declare to not have conflict of interest.


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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Matteo Danza
    • 1
  • Pietro Tortora
    • 1
  • Alessandro Quaranta
    • 2
  • Vittoria Perrotti
    • 3
  • Iole Vozza
    • 2
  • Adriano Piattelli
    • 3
    Email author
  1. 1.PescaraItaly
  2. 2.Dental School “Sapienza”University of RomeRomeItaly
  3. 3.Dental SchoolUniversity of Chieti-PescaraChietiItaly

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