Dental burs; Dental drills; Dental instruments for use in preparing an osteotomy and positioning guides therefor; Dental instruments, namely, burs and drilling bits for bone and positioning guides therefor; Dental and medical drill bits for cutting teeth or bone; Drilling jigs for surgical and dental applications; Drills for dental applications; Drills for dental use; Surgical instruments and apparatus; Surgical instruments for use in preparing an osteotomy and positioning guides therefor; Surgical instruments, namely, burs and drilling bits for bone and positioning guides therefor; Surgical devices and instruments; Surgical apparatus and instruments for medical, dental or veterinary use