Early Implant Bone Loss in the Preprosthetic Phase: A Retrospective Study

Area of Science:

• Dental Implantology
• Periodontology
• Oral Surgery

Background:

• Crestal bone loss around dental implants during healing can impact long-term prognosis.
• Understanding early bone loss is crucial for successful implant outcomes.
• Inflammatory responses initiated by implant placement can stimulate bone remodeling.

Purpose of the Study:

• To estimate early implant bone loss during the preprosthetic phase for equicrestally placed bone level implants.
• To analyze factors influencing crestal bone loss in the early stages of dental implant healing.

Main Methods:

• Retrospective observational study of 271 two-piece implants in 149 patients.
• Evaluation of digital orthopantomographic records (postsurgical and preprosthetic) using MicroDicom software.
• Analysis of bone loss based on patient sex, implant placement timing, healing duration, and implant region/site.

Main Results:

• Average marginal bone loss was 0.56 mm (mesial) and 0.44 mm (distal), a statistically significant difference (P < .01).
• Overall average crestal bone loss was 0.50 mm during the preprosthetic phase.
• No significant differences in bone loss were found based on sex, implant placement type, loading time, or implant region/site (P > .05).

Conclusions:

• Delayed implant placement and extended healing periods may increase early implant bone loss.
• The study identified average early bone loss but found limited influence from other analyzed factors.
• Further research may be needed to fully elucidate factors affecting peri-implant bone levels.