Immediate and delayed implant placement into extraction sockets: a 5-year report

Area of Science:

• Dentistry
• Oral Implantology
• Periodontology

Background:

• Presents 5-year results complementing earlier 3-year data from a prospective multicenter study.
• Focuses on immediate and delayed implant placement in fresh extraction sockets.

Purpose of the Study:

• Evaluate immediate and long-term success of implants in fresh extraction sockets.
• Analyze success based on implant characteristics, bone factors, position, socket depth, and extraction reason.

Main Methods:

• Prospective study with 143 patients and 264 implants across 12 centers.
• Implants placed immediately or after 3-5 weeks of soft-tissue healing.
• Patients categorized into five subgroups based on insertion method.

Main Results:

• Cumulative implant survival rate after 5 years of loading: 92.4% (maxilla), 94.7% (mandible).
• No significant difference in failure rates observed across different insertion methods.
• Identified a clinical correlation between implant failure and periodontitis as the reason for tooth extraction.

Conclusions:

• Placing Brånemark implants into fresh extraction sites is successful over 5 years of loading.
• Periodontitis as an extraction reason may negatively influence implant outcomes.
• Hypothesized that infrabony defects associated with periodontitis could compromise primary stability or increase bone-implant gaps.