Patent Publication Number: US-2010112517-A1

Title: Drill for rapid dental implant

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a drill dental implant and more particularly, to a high-efficient drill for drilling a hole on a crestal bone efficiently at a time for direct tapping. 
     2. Description of the Related Art 
     During dental implant placement, osteotomy is performed to make a proper size round hole on the crestal bone for the installation of an implant. 
     During osteotomy, drills are used to drill a cut hole. According to conventional designs, different sizes of drills, as shown in  FIG. 1  A˜J, are used to finish the drilling operation. In  FIG. 1 , the component referenced by A is a round bur for flattening the occlusal surface of the crestal bone  10  and making a location mark for implant; the components referenced by B, C, E, F, G and H are drills of different diameters for drilling a cut hole smaller than the diameter of the implant (for example, if the diameter of the implant is 4.75 mm, the diameter of the drill H is 4.25 mm); the component D is a depth gauge. 
     After drilling of a cut hole with different drills B, C, E, F, G and H, a countersink drill, referenced by I, is used to drill the cut hole to the desired diameter equal to the implant K, and then the tap, referenced by J, is used to tap a thread in the cut hole for the installation of the threaded implant K in the crestal cone  10 . 
     According to the aforesaid conventional cut hole drilling method, different sizes of drills must be used, prolonging the operation time and increasing the difficulty, thereby lowering the operation success rate. 
     SUMMARY OF THE INVENTION 
     The present invention has been accomplished under the circumstances in view. It is therefore the main object of the present invention to provide a drill for rapid dental implant, which shortens the operation time, saving tool component changing time, eliminating potential error, and raising the implant success rate. 
     To achieve this and other objects of the present invention, the drill comprises a connection head configured for quick connection to a dental handpiece, a round bur, and a series of active drill body portions of different diameters connected between the connection head and the round bur, said active drill body portions in an order from the smallest diameter to the largest diameter in direction from the round bur toward the connection head. 
     Further, a V-groove is formed around the periphery of the drill between each two adjacent ones of the active drill body portions so that the center point is relatively shifted to produce the accurate hole location during drilling. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates a drill set required for cut-hole drilling for dental implant. 
         FIG. 2  is an elevational view of a drill in accordance with the present invention. 
         FIG. 3  is a plain view of the drill in accordance with the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIGS. 2 and 3 , a drill  20  in accordance with the present invention is shown comprising a connection head  21  configured for quick connection to a dental handpiece, a stop block  211  disposed at the bottom side of the connection head  21 , a round bur  26  disposed at the distal end, and a series of active drill body portions  22 ˜ 25  axially extending upwards from the round bur  26  to the bottom side of the stop block  211  in axial alignment with the connection head  21  in the order from the smallest diameter to the largest diameter in the direction from the round bur  26  toward the connection head  21 . The round bur  26  is for location marking and crestal bone flattening. The active drill body portions  22 ˜ 25  are for drilling a vertical hole on the crown. 
     The active drill body portions  22 ˜ 24  show a conical configuration. A V-groove  221 ,  231  or  241  is provided around the periphery of the drill  20  between each two adjacent ones of the active drill body portions  22 ˜ 24  so that the center point is relatively shifted to produce the accurate hole location during drilling. The topmost active drill body portion  25  has a cylindrical shape of uniform diameter. Among the active drill body portions  22 ˜ 24 , the topmost active drill body portion  25  has the largest diameter and length for drilling a hole sufficient for the insertion of a tap J. 
     The diameter of the topmost active drill body portion  25  is equal to the diameter of a tap J so that the drill  20  can drill a cut hole equal to the diameter of the implant K to be implanted for tapping with a tap J for the installation of the implant K (with respect to implant K and tap J, please refer also to  FIG. 1 ). 
     During osteotomy, a cut hole is made on the crestal bone  10  with the drill  20 , and then tapped with a tap for directly installation of the implant K. By means of the application of the drill  20 , the operation time is greatly shortened, saving tool component changing time, eliminating potential error, and raising the implant success rate. 
     Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.