[The role of surface roughness in promoting osteointegration]

Area of Science:

• Biomaterials Science
• Dental Implantology
• Orthopedic Research

Context:

• Endosseous dental implants, primarily screw-type commercially pure titanium, are established for prostheses anchorage.
• Recent advancements focus on simplifying surgical procedures and modifying clinical treatment through innovative implant surfaces.
• Microrough titanium surfaces, produced via grit-blasting or acid-etching, are emerging as a significant development.

Purpose:

• To evaluate the efficacy of microrough titanium dental implants compared to polished or machined surfaces.
• To investigate the cellular mechanisms underlying the interaction between implant surface topography and osteoblast response.
• To assess the clinical advantages and long-term predictability of microrough titanium implants in human trials.

Summary:

• In-vivo studies show microrough titanium implants achieve faster bone integration, higher Bone Implant Contact (BIC), and increased Removal Torque Values (RTV) versus smoother surfaces.
• In-vitro studies reveal osteoblasts exhibit altered proliferation and differentiation, with enhanced PGE2 and TGF-beta 1 production on rougher surfaces, indicating modulated osteogenesis.
• Clinical trials demonstrate that roughened titanium implants require shorter healing periods (6-8 weeks) and allow for the use of shorter implant lengths (6-8 mm).

Impact:

• Microrough surfaces accelerate osseointegration and improve implant stability, reducing patient treatment time.
• The ability to use shorter implants avoids complex surgical interventions like sinus grafting or nerve lateralization.
• While promising, long-term clinical documentation and predictability studies for microrough implants are still needed.