[Why not try to move on ankylosed tooth orthodontically?].

Area of Science:

• Biomechanical Engineering
• Cell Biology
• Orthopedics

Background:

• The rigid inorganic matrix of bone prevents direct mechanical influence on blood supply or osteocyte deformation.
• Evidence for bone's direct perception of mechanical forces is limited.
• Mechanical stimuli are crucial for bone remodeling, but the exact mechanism remains debated.

Purpose of the Study:

• To investigate the hypothesis that mechanical perturbations elicit bone remodeling indirectly through soft tissue envelopes.
• To identify the specific soft tissues and cellular components involved in mechanotransduction leading to bone remodeling.

Main Methods:

• The study proposes a hypothesis based on existing knowledge of bone structure and mechanical response.
• It focuses on the role of soft tissue envelopes (periodontal ligament, periosteum, fibrous tissues) as intermediaries for mechanical signaling.
• Cellular composition of these envelopes (fibroblasts, preosteoblasts, mesenchymal cells) is considered.

Main Results:

• Mechanical perturbations are hypothesized to act via soft tissue envelopes rather than directly on bone.
• These soft tissue envelopes include the periodontal ligament, periosteum, and fibrous tissues around implants and sutures.
• Fibroblasts, preosteoblasts, and mesenchymal cells within these envelopes are proposed as the key mechanosensitive cells.

Conclusions:

• Bone remodeling subsequent to mechanical force application is likely mediated by soft tissue envelopes.
• These envelopes act as crucial intermediaries, translating mechanical stimuli into cellular responses.
• The cellular components within these soft tissues are potentially responsible for initiating bone remodeling processes.