[Differences of bone augmentation in patients with different bone defects by extraction site preservation]

Area of Science:

• Dental Implantology
• Oral Surgery
• Bone Regeneration

Background:

• Alveolar bone resorption is a common complication following tooth extraction.
• Maintaining bone volume is critical for successful dental implant placement and long-term stability.
• Extraction site preservation (ESP) is a technique aimed at minimizing post-extraction bone loss.

Purpose of the Study:

• To compare bone augmentation outcomes in patients with varying degrees of bone defects undergoing extraction site preservation versus conventional tooth extraction.
• To evaluate the efficacy of ESP in preserving alveolar bone dimensions and promoting bone mass recovery.

Main Methods:

• Eighty-five patients were randomized into an experimental group (ESP) and a control group (conventional extraction).
• Patients were categorized into one-, two-, three-, and four-wall bone defect groups.
• Cone-beam CT (CBCT) was used to assess alveolar bone height, width, and bone width recovery rate pre- and post-surgery (6 months).

Main Results:

• Extraction site preservation significantly increased buccal and lingual bone volume compared to conventional extraction.
• Bone width and height increased with ESP, whereas a decrease was observed in the control group.
• Smaller bone defects (one- and two-wall) demonstrated significantly better bone mass recovery with ESP.

Conclusions:

• Extraction site preservation effectively mitigates alveolar bone resorption and preserves bone mass compared to routine tooth extraction.
• The degree of bone defect influences the effectiveness of bone mass recovery, with smaller defects yielding better results.
• ESP is a valuable technique for enhancing bone regeneration and supporting dental implant outcomes.