Aesthetic orthodontic bracket and method of making same
An orthodontic bracket for coupling an archwire with a tooth includes a bracket body that has an archwire slot adapted to receive the archwire. A movable member is engaged with the bracket body and is movable between an opened position and a closed position. The bracket body and movable member are made from a transparent or translucent ceramic for improved aesthetics. The bracket body may include one or more stop surfaces that limit movement of the moveable member in the gingival direction. The bracket body may include a support surface that is positioned lingually of a labial edge of the archwire slot. The moveable member may include a bracket-engaging portion having a first surface confronting the bracket body and a slot-covering portion having a second surface confronting the archwire slot, the first and second surfaces being offset from one another.
1. An orthodontic bracket comprising:
a bracket body including an archwire slot, a support surface that opens to the archwire slot, and a pair of guide members adjacent the support surface; and
a ligating slide movable on the support surface between the opposingguide members relative to the archwire slot from an opened position to a closed position, the ligating slide including a first portion that confronts the support surface in at least the closed position, and a second portion extending from the first portion in an outward direction to form a labial side of the ligating slide and having at least a portion that extends from the first portion in a gingival-occlusal direction so that only the second portion confronts the archwire slot in the closed position, wherein the first portion has a first width and a gingival-occlusal directional length and the second portion has a second width that is narrower than the first width and a gingival-occlusal directional length that is greater than the gingival-occlusal directional length of the first portion.
2. The orthodontic bracket of claim 1 , wherein the bracket body further includes a projection extending outwardly from the support surface and the first portion of the ligating slide includes a cavity for receiving the projection when the ligating slide is in the closed position.
3. The orthodontic bracket of claim 2 , wherein the cavity extends in a gingival-occlusal direction and opens to a peripheral edge portion of the first portion.
4. The orthodontic bracket of claim 2 , wherein the bracket body further includes a spring pin that extends from the projection and engages the ligating slide in the opened position.
5. An orthodontic bracket comprising:
a bracket body including an archwire slot, a support surface that opens to the archwire slot, a pair of guide members adjacent the support surface, and a cutout opposite from the support surface across the archwire slot and including a tool receptacle that is narrower in width than the width of the support surface and is open toward the support surface; and
a ligating slide movable on the support surface between the opposing guide members relative to the archwire slot from an opened position to a closed position, the ligating slide including a first portion that confronts the support surface of the bracket body in at least the closed position, and a second portion extending from the first portion, wherein the second portion extends into the cutout in the closed position, and the tool receptacle is configured to cooperate with a tool for moving the ligating slide away from the closed position toward the opened position.
6. The orthodontic bracket of claim 5 , wherein the bracket body further includes a projection extending outwardly from the support surface and the first portion of the ligating slide includes a cavity for receiving the projection when the ligating slide is in the closed position.
7. The orthodontic bracket of claim 6 , wherein the cavity extends in a gingival-occlusal direction and opens to a peripheral edge portion of the first portion.
8. The orthodontic bracket of claim 6 , wherein the bracket body further includes a spring pin that extends from the projection and engages the ligating slide in the opened position.
9. The orthodontic bracket of claim 5 , wherein the archwire slot separates a first side of the bracket body from a second opposing side of the bracket body, and the first side and second side each include at least one tie wing.
10. The orthodontic bracket of claim 5 , wherein the first portion of the ligating slide includes a mesial portion and a distal portion, and the second portion includes a raised central portion that lies substantially flush with outer surfaces of the opposing guide members when the ligating slide is in the closed position.
11. The orthodontic bracket of claim 10 , wherein the first portion of the ligating slide defines a first width and has a gingival-occlusal directional length, and the second portion of the ligating slide extends from the first portion in a gingival-occlusal direction and defines a second width that is narrower than the first width and has a gingival-occlusal directional length that is greater than the gingival-occlusal directional length of the first portion.
12. The orthodontic bracket of claim 5 , wherein the tool receptacle is closed in a direction away from the support surface.
13. A ligating slide for use with a bracket body of a self-ligating orthodontic bracket, the bracket body including an archwire slot for coupling an archwire with a tooth and a support surface for supporting the ligating slide, the ligating slide being movable relative to the bracket body from an opened position to a closed position, the ligating slide comprising:
a first portion configured to engage the support surface; and
a second portion extending from the first portion in a n outward direction to form a labial side of the ligating slide and having at least a portion that extends from the first portion in a gingival-occlusal direction so that only the second portion confronts the archwire slot when the ligating slide is in the closed position;
wherein the first portion defines a first width and has a gingival-occlusal directional length and the second portion defines a second width that is narrower than the first width and has a gingival-occlusal directional length that is greater than the gingival-occlusal directional length of the first portion.
14. The ligating slide of claim 13 , wherein the first portion includes a cavity configured to receive a projection extending outwardly from the support surface of the bracket body.
15. The ligating slide of claim 14 , wherein the cavity extends in a gingival-occlusal direction and opens to a peripheral edge portion of the first portion.
16. The ligating slide of claim 13 , wherein the first portion includes a mesial portion and a distal portion, the first width being defined from the mesial portion to the distal portion and at least one of the mesial portion and distal portion defining the gingival-occlusal directional length.