Marginal bone loss around crestal or subcrestal dental implants: prospective clinical study

Area of Science:

• Dental Implantology
• Periodontology
• Oral Surgery

Background:

• Crestal bone stability is crucial for dental implant success.
• Dental implants can be positioned equicrestally (crestal) or subcrestally.
• Understanding implant depth's effect on bone loss is essential.

Purpose of the Study:

• To evaluate the impact of dental implant placement depth (crestal vs. subcrestal) on marginal bone loss.
• To compare bone level changes at 3 and 6 months post-surgery.
• To determine if implant positioning affects long-term bone stability.

Main Methods:

• Split-mouth design involving 49 implants in 18 patients.
• Digital parallel radiography used to measure bone levels.
• Measurements taken at baseline, 3 months, and 6 months post-implantation.

Main Results:

• No significant difference in marginal bone loss between crestal and subcrestal implants at 3 or 6 months.
• Mean mesial bone loss: 0.83 mm (crestal) vs. 1.03 mm (subcrestal).
• Mean distal bone loss: 0.81 mm (crestal) vs. 0.88 mm (subcrestal).
• Bone loss was not significantly affected by sex, jaw location, region, or implant dimensions.

Conclusions:

• Implant placement depth (crestal or subcrestal) does not significantly influence marginal bone loss.
• Both placement strategies appear comparable regarding crestal bone stability in the short term.
• Further long-term studies may be warranted to confirm these findings.