Handheld instrument for holding a dental bur

A handheld dental bur (100), comprising:

• a handle portion (101) having a first end (101a) and a second end (101b), the second end (101b) comprising a perforation hole (101e) configured for receiving a lock pin (103), and the first end comprising a set of female threads (101d) provided at an interior surface of an opening (1011);
• a Micro-Chuck Assembly (MCA) (102) comprising:
• a 2 mm thick heavy-duty collar (102a) having an exterior surface, openings at two opposing ends forming a hollow anterior, and a pair of slots (102d) opposingly disposed on the outer surface of the collar (102a);
• a collet (102c) comprising an anterior end (104a) and a posterior end (104b), wherein the anterior end (104a) of the collet (102c) comprises an elongated opening (107) located in between at least three double-tapered prongs (105) for receiving a shank portion (108a) of a dental bur (108), and the posterior end (104b) comprises a set of male threads (106), wherein each of the double-tapered prongs (105) comprises an anterior tapered end and a posterior tapered end;
• a washer (102b) disposed of around an end (102e) of the collar (102a) separating the first end (101a) of the handle portion (101) and the collar (102a);
• wherein the set of male threads (106) provided at the posterior end (104b) of the collet (102c) engages with the set of female threads (101d) provided at the interior surface of the opening (101f) of the handle portion (101) to detachably attach the MCA (102) to the handle portion (101);
• and
• wherein the pair of slots (102d) on the outer surface of the collar (102a) are configured to receive a gripping tool (110).

A handheld dental bur (100), comprising:

• a handle portion (101) having a first end (101a) and a second end (101b), the second end (101b) comprising a perforation hole (101e) configured for receiving a lock pin (103), and the first end comprising a set of female threads (101d) provided at an interior surface of an opening (1010;
• a Micro-Chuck Assembly (MCA) (102) comprising:
• a 1 mm thick light-duty collar (102a) having an exterior surface, openings at two opposing ends forming a hollow anterior, and knurling provided on the exterior surface;
• a collet (102c) comprising an anterior end (104a) and a posterior end (104b), wherein the anterior end (104a) of the collet (102c) comprises an elongated opening (107) located in between at least three double-tapered prongs (105) for receiving a shank portion (108a) of a dental bur (108), and the posterior end (104b) comprises a set of male threads (106), wherein each of the double-tapered prongs (105) comprises an anterior tapered end and a posterior tapered end;
• a washer (102b) disposed of around an end (102e) of the collar (102a) separating the first end (101a) of the handle portion (101) and the collar (102a);
• wherein the set of male threads (106) provided at the posterior end (104b) of the collet (102c) engages with the set of female threads (101d) provided at the interior surface of the opening (101f) of the handle portion (101) to detachably attach the MCA (102) to the handle portion (101);
• wherein, the knurling provided on the exterior surface of the 1 mm thick light-duty collar (102a) helps in gripping the collar (102a) using a clamping tool (120,130,140);
• and
• wherein the gripping of the collar (102a) and reception of the lock pin (103) within the perforation hole (101e) helps in applying required torque for tightening of the MCA (102) with respect to the handle portion (101).