Bone Screws; Dental Alloys/radiation effects; Orthodontic Anchorage Procedures/instrumentation; Titanium/radiation effects; Ultraviolet Rays; Alkaline Phosphatase/analysis; Alloys; Animals; Biomechanical Phenomena; Bone-Implant Interface/anatomy & histology; Calcification, Physiologic/physiology; Calcium/analysis; Cell Adhesion/physiology; Cell Movement/physiology; Cells, Cultured; Dental Alloys/chemistry; Femur/surgery; Femur/ultrastructure; Hydrophobic and Hydrophilic Interactions; Male; Materials Testing; Osseointegration/drug effects; Osteoblasts/drug effects; Osteogenesis/physiology; Phosphorus/analysis; Rats; Rats, Sprague-Dawley; Stress, Mechanical; Surface Properties; Time Factors; Titanium/chemistry