Scanning electron microscopy observations of initial clot formation on treated root surfaces

Area of Science:

• Dental research
• Periodontology
• Biomaterials science

Background:

• Understanding initial blood clot formation on root surfaces is crucial for periodontal disease treatment.
• Periodontal disease affects root surfaces, influencing healing and regeneration processes.

Purpose of the Study:

• To investigate the morphological sequence of blood clot formation on various human tooth root surfaces.
• To compare clot formation on healthy versus periodontally diseased root surfaces with different treatments.

Main Methods:

• Human teeth with and without periodontal disease were extracted and sectioned.
• Root surfaces were treated (intact PDL, planed, citric acid application).
• Scanning electron microscopy (SEM) was used to evaluate clot formation at different time points (0-4 minutes).

Main Results:

• Plasma proteins were the initial deposit on all root surfaces.
• Platelets and erythrocytes enmeshed in fibrin formed clots rapidly on intact PDL and treated surfaces (planed + citric acid).
• No organized clot formed on plaque-free diseased root surfaces; clot lysis occurred by two minutes on most surfaces.

Conclusions:

• Initial blood clot formation is influenced by root surface condition and treatment.
• Intact periodontal ligament and citric acid treatment promote faster clot formation.
• Plaque presence significantly inhibits organized clot formation on diseased root surfaces.