CN115778586A - Oral cavity planting cavity preparation digital control method, fixed point rod and directional rod - Google Patents
Oral cavity planting cavity preparation digital control method, fixed point rod and directional rod Download PDFInfo
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Abstract
The invention relates to a digital control method for oral cavity implantation cavity preparation, a fixed point rod and an orientation rod, which comprises the following steps: 1) Before the preparation of the digitalized auxiliary planting cavity, according to three-dimensional scanning data and cbct data in the mouth of a patient, defining a position which is designed before a mimics software operation and takes repairing as a guide as an ideal implant position; 2) Establishing a coordinate system; 3) Planting hole primary positioning: 4) Registering C1 to A1, and registering the designed fixed point bar data to the C1 fixed point bar; 5) Calculating fixed point offset; 6) Adjusting the position of the fixed point according to the offset distance and the angle; 7) Obtaining three-dimensional scanning data C2 of a measuring rod with an orientation rod; 8) Calculating the offset of the backup hole; 9) Preparing the digital auxiliary planting pits to the last stage; the invention combines the intraoral scanning and auxiliary measuring device of the fixed point rod and the directional rod, and assists the preparation of the planting cavity by a digital means, thereby reducing the error of the preparation of the planting cavity.
Description
Technical Field
The invention relates to a digital auxiliary oral cavity planting cavity preparation; in particular to a digital control method for cavity preparation of oral implant, a fixed point rod and an orientation rod.
Background
The theoretical basis of dental implant is osseointegration, also known as osseointegration, where the implant binds directly to the alveolar bone to provide retention. Poor implant placement often leads to peri-implantitis, causing bone resorption. Therefore, one of the key factors for determining success or failure of the implantation is the accuracy of the implantation cavity preparation, so that the implant can obtain an ideal three-dimensional position.
At present, the preparation of the planting cavity in clinic mainly comprises the following three modes: the doctor prepares by experience, the personalized planting guide plate assists in preparing and the real-time operation navigation system assists in preparing. With free hand preparation by physicians being the most clinically significant surgical procedure at present. In the preparation process of the free hand cavity, a measuring rod with a corresponding diameter and scales is inserted after the cavity of the current stage is prepared, and the depth and the angle of the measuring rod and the position relation between the measuring rod and adjacent teeth and between the adjacent teeth and the pair of 'closed' teeth are evaluated visually, so that the depth and the direction of the prepared cavity of the next stage are adjusted. Because the visual method has larger error, the accurate adjustment of clinic can not be quantitatively guided. The implantation position of the implant mainly depends on the clinical experience of a doctor and the accuracy of operation, and any minor error and deviation of the operation can affect the long-term function and the aesthetic effect, even can damage important anatomical structures such as lower alveolar nerves, maxillary sinus floor and nasal floor mucous membrane, and cause unnecessary complications, so the requirement on the technical level of the doctor is high. Compared with a free hand mode, the personalized planting guide plate can obviously improve the precision of the preparation of the planting cavities. Based on the oral scan and CBCT data, the designed information such as the planting position, the direction and the depth is transferred into the oral cavity, and the accurate planting positioning is realized. However, the method is complex to operate, a personalized planting guide plate needs to be designed, manufactured and sterilized before operation, the planting guide plate influences the cooling effect of the normal saline in the hole preparation process, a patient with limited mouth opening cannot perform hole preparation assisted by the planting guide plate, in addition, the economic burden of the patient is increased by the manufacturing of the guide plate, and the wide application is difficult. The real-time navigation system can measure the width and height of the alveolar bone through CBCT data, transfer the measurement information into the mouth in real time, and realize accurate control of the implant operation by means of a complex operation navigation system. During the operation, the operator needs to monitor the real-time position of the drill bit or the implant displayed on the screen, but cannot monitor the change of the operation area (such as the intra-operative displacement of the reference plate for registration) in real time, so that certain operation safety risks exist. The positioner installed on the mobile phone greatly affects the operation [ 1 ] and the clinical operation flow is also complex, so the dynamic navigation technology is often used for specific cases needing to avoid certain key anatomical structures, and is not daily routine clinical operation [ 2 ].
Reference documents:
【1】 The oral implanting robot is primarily applied to the oral implanting operation;
【2】 An in-vitro experimental study of a universal oral implant positioner.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a digital control method for oral cavity planting cavity preparation, a fixed point rod and an orientation rod.
(II) technical scheme
The invention discloses a digital control method for oral cavity implantation cavity preparation, which comprises the following steps:
1) Before preparation of a digital auxiliary planting cavity, according to three-dimensional scanning data and cbct data in a patient's mouth, defining a position which is designed before a mimics software operation and takes repairing as a guide as an ideal implant position, defining the implant as an ideal implant, wherein the height of the implant is h, the intersection point Pv of the long axis of the ideal implant and the crest of an alveolar ridge is output, and the three-dimensional scanning data A1 in the mouth and the ideal implant data B1 which have relative position relation are output;
2) Establishing a coordinate system: taking the central point of the neck plane of the ideal implant as an origin O, the mesial direction as the M-axis direction, the buccal side direction as the B-axis direction and the coplanar direction as the C-axis direction, and simultaneously dividing the ideal implant platform into four quadrants, namely a mesial cheek, a distal tongue and a mesial tongue, wherein the Pv coordinate is (0, p);
3) Planting hole primary positioning: in the initial preparation stage of the digital auxiliary planting cavity, firstly, drilling a fixed point by using a ball, initially positioning by using a drill with the diameter of 2.2mm, inserting a fixed point rod, and carrying out intra-oral three-dimensional scanning after positioning to obtain intra-oral three-dimensional scanning data C1 with the fixed point rod;
4) Keeping A1 and B1 still, registering C1 to A1 according to dentition registration, registering the designed fixed point rod data to the C1 fixed point rod, wherein the coordinates of the intersection point Pr of the long axis of the C1 fixed point rod and the crest of the alveolar ridge are (m, B, C);
5) And (3) fixed point offset calculation: offset distance
If m is>0,b>0, adjust PrPv in the mesio-lingual direction if m>0,b<0, adjust PrPv in the mesial-buccal direction if m<0,b>0, adjust PrPv in the mesio-lingual direction, if m<0,b<0, adjusting PrPv towards the medial buccal side, and forming an included angle arctan (b/m) + k pi with the medial axis; k =0 or 1;
6) Adjusting the fixed point position according to the offset distance and the angle until the clinical requirement is met;
7) Preparing holes by using a 2.2mm twist drill with the depth of h in the preparation of the digital auxiliary planting holes, inserting a designed orientation rod, and carrying out three-dimensional scanning in the mouth after the orientation rod is in place to obtain three-dimensional scanning data C2 of a measuring rod with the orientation rod;
8) And (3) calculating the offset of the backup hole: keeping A and B still, and registering C2 to A1 according to dentition registration; based on the characteristic registration, registering the designed measuring rod data with the diameter of 2.2mm to a C2 orientation rod; intersection points of the central axis of the C2 orientation rod and the bottom plane and the top plane of the orientation rod are respectively Pa (m 1, b1, C1) and Pb (m 2, b2, C2); the central point of the corresponding actual implant neck plane is O '(m 0, b0, c 0), and the calculated O' coordinate is: m0= m1+ h (m 2-m 1)/PaPb, b0= b1+ h (b 2-b 1)/PaPb, c0= c1+ h (c 2-c 1)/PaPb;
the included angle between a measuring rod of the orientation rod and the paraxial region is theta = arctan [ (b 2-b 1)/(m 2-m 1) ] + k pi; k =0 or 1;
included angle between measuring rod of directional rod and occlusal surface direction
Tilt direction of the measuring rod of the orientation bar:
if m1< m2, b1< b2, then it is inclined toward the mesial-buccal side,
if m1< m2, b1= b2, then tilt towards the mesial,
if m1< m2, b1> b2, leaning towards the mesial tongue,
if m1= m2, b1< b2, tilting to the buccal side,
if m1= m2, b1= b2, then there is no tilt,
if m1= m2, b1> b2, inclined to the lingual side,
if m1> m2, b1< b2, tilting towards the far middle cheek,
if m1> m2, b1= b2, tilting to the far centre,
if m1> m2, b2< b1, tilt towards the distal tongue;
9) And adjusting the depth and the angle of the next-stage spare hole according to the offset obtained in the previous step, and repeating the calculation process until the digitalized auxiliary planting hole is prepared to the last stage.
Wherein the method of registration of the pointing stick data onto the C1 pointing stick: based on feature registration, the registration method comprises the following steps: fitting out a plane according to the upper end plane of the oral scanning fixed point rod, fitting out a central axis according to the cylindrical curved surface of the fixed point rod, aligning based on two characteristics of the plane and the axis, and registering the fixed point rod data designed in the forward direction into the oral three-dimensional scanning data.
The central axis of the C2 directional rod and the bottom plane of the directional rod are root plane, and the central axis of the C2 directional rod and the top plane of the directional rod are crown plane.
The total length of the fixed point rod is 14mm, the upper end cylinder is a three-dimensional scanning area, the diameter is 4.8mm, the height is 2.6mm, the diameter of the lower cylinder is 2.2mm, the length is 7.8mm, the bottom of the cylinder is a ball table with the diameter of 2.2mm and the height of 1mm, grooves are respectively designed at the positions of the fixed point rod with the heights of 4mm, 6mm and 8mm, and therefore clinical hole preparation depth reference is facilitated; the upper and lower cylinders are connected by a truncated cone with the height of 2.6 mm.
Wherein the total length of the orientation rod is 22mm; the upper end cylinder is a three-dimensional scanning area, the diameter is 4.8mm, and the height is 4mm; designing an ideal implant with the diameter of 4.8mm according to the size of the step-by-step prepared holes, and preparing the holes by using twist drills with the diameters of 2.2mm, 2.8mm, 3.5mm and 4.2mm in sequence, wherein the 2.2mm is a first-step prepared hole; 2.8mm is a second-stage prepared hole; 3.5mm is a third pole spare hole; 4.2mm is a fourth-level prepared hole, the lower cylinder is a measuring rod, the diameters of the lower cylinder are respectively set to be 2.2mm, 2.8mm, 3.5mm and 4.2mm, the length of the lower cylinder is 15.3mm, the bottom of the cylinder is a spherical table with the diameters of 2.2mm, 2.8mm, 3.5mm and 4.2mm and the height of 1mm, grooves are respectively designed at the positions of 4mm, 6mm, 8mm, 10-12mm and 14mm of the height of the orientation rod, and the depth reference of the clinical prepared hole is facilitated; the upper and lower cylinders are connected by a circular table with the height of 1.7 mm.
(III) advantageous effects
The invention has the advantages that:
according to the invention, the intraoral scanning data automatic registration algorithm is combined with the fixed point rod and the directional rod device, so that the preparation precision of the free hand cavity is improved, the experience dependence of the traditional free hand cavity preparation is overcome, a real object positioning guide plate is replaced by a digital means, and the method is simpler and more convenient compared with a real-time navigation technology, and is more suitable for popularization in daily clinical work as a suitable technology.
Drawings
FIG. 1 is a schematic view of a coordinate system of the present invention;
FIG. 2 is a schematic diagram of a three-dimensional coordinate system of fixed point offset distances;
FIG. 3 is a schematic view of the intersection of the center axis of the orientation bar of the present invention C2 with the bottom plane (i.e., root square) and the top plane (i.e., crown square) of the orientation bar;
FIG. 4 is a block schematic diagram of the workflow of the present invention;
in the figure, O: the origin of the central point of the ideal implant neck plane; m is the axial direction of the mesial direction; b, axial direction of buccal side direction; c: the axial direction of the plane-combining direction; pv: the intersection point of the long axis of the ideal implant and the crest of the alveolar ridge; pr: c1, the intersection point of the long axis of the fixed point rod and the crest of the alveolar ridge; p: is a coordinate value along the direction of the axis of the plane-joining direction; m is a coordinate value in the direction of the M axis; b: coordinate values along the B axis direction; c: coordinate values along the C-axis direction; pa: c2, the intersection point of the central axis of the orientation rod and the bottom plane of the orientation rod; pb: c2, intersecting points of the central axis of the orientation rod and the top plane of the orientation rod; m0: a coordinate value along the M axis direction in the coordinate of the central point O' of the actual implant neck platform; b0: a coordinate value in the center O' coordinate of the actual implant neck platform along the B axis direction; c0: a coordinate value in the C axis direction in the center O' coordinate of the actual implant neck platform; m1: c2, coordinate values along the M axis direction in the Pa coordinate of the intersection point of the central axis of the orientation rod and the bottom plane of the orientation rod; b1: c2, coordinate values along the direction of the axis B in a Pa coordinate of the intersection point of the central axis of the orientation rod and the bottom plane of the orientation rod; c1: c2, coordinate values along the C axis direction in the Pa coordinate of the intersection point of the central axis of the orientation rod and the bottom plane of the orientation rod; m2: c2, coordinate values along the M axis direction in the Pb coordinates of the intersection point of the central axis of the orientation rod and the top plane of the orientation rod; b2: c2, coordinate values along the B axis direction in the Pb coordinates of intersection points of the central axis of the orientation rod and the top plane of the orientation rod; c2: and the coordinate value along the C axis direction in the coordinate of the intersection point Pb coordinate of the central axis of the C2 orientation rod and the top plane of the orientation rod.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The invention discloses a digital control method for oral cavity implantation cavity preparation, which comprises the following steps:
1) According to three-dimensional scanning data and cbct data in a patient's mouth before the preparation of a digital auxiliary planting cavity, a position which is designed by using a mix software preoperatively and is repaired as a guide is defined as an ideal implant position, the implant is defined as an ideal implant, the height of the implant is h, the intersection point Pv of the long axis of the ideal implant and the crest of a alveolar ridge is output, and intraoral three-dimensional scanning data A1 and ideal implant data B1 which have relative position relation are output;
2) Establishing a coordinate system: taking the central point of the neck plane of the ideal implant as an origin O, the mesial direction as the M-axis direction, the buccal side direction as the B-axis direction and the coplanar direction as the C-axis direction, and simultaneously dividing the ideal implant platform into four quadrants, namely a mesial cheek, a distal tongue and a mesial tongue, wherein the Pv coordinate is (0, p);
3) Planting hole primary positioning: in the initial preparation stage of the digital auxiliary planting cavity, firstly, drilling a fixed point by using a ball, initially positioning by using a drill with the diameter of 2.2mm, inserting a fixed point rod, and carrying out intra-oral three-dimensional scanning after positioning to obtain intra-oral three-dimensional scanning data C1 with the fixed point rod;
4) Keeping A1 and B1 still, registering C1 to A1 according to dentition registration, registering the designed fixed point rod data to the C1 fixed point rod, wherein the Pr coordinate of the long axis of the C1 fixed point rod and the crest of the alveolar ridge is (m, B, C);
5) And (3) fixed point offset calculation: offset distance
If m is>0,b>0, adjust PrPv in the mesio-lingual direction if m>0,b<0, adjust PrPv in the mesial-buccal direction if m<0,b>0, adjust PrPv in the mesio-lingual direction, if m<0,b<0, adjusting PrPv towards the mesial buccal direction, and forming an included angle arctan (b/m) + k pi with the mesial axis; k =0 or 1;
6) Adjusting the fixed point position according to the offset distance and the angle until the clinical requirement is met;
7) Preparing holes by using a 2.2mm twist drill with the depth of h in the preparation of the digital auxiliary planting holes, inserting a designed orientation rod, and carrying out three-dimensional scanning in the mouth after the orientation rod is in place to obtain three-dimensional scanning data C2 of a measuring rod with the orientation rod;
8) And (3) calculating the offset of the backup hole: keeping A and B still, and registering C2 to A1 according to dentition registration; based on the characteristic registration, registering the designed measuring rod data with the diameter of 2.2mm to a C2 orientation rod; intersection points of the central axis of the C2 orientation rod and the bottom plane and the top plane of the orientation rod are Pa (m 1, b1, C1) and Pb (m 2, b2, C2) respectively; the center point of the corresponding actual implant neck plane is O '(m 0, b0, c 0), and the calculated O' coordinate: m0= m1+ h (m 2-m 1)/PaPb, b0= b1+ h (b 2-b 1)/PaPb, c0= c1+ h (c 2-c 1)/PaPb;
the included angle theta = arctan [ (b 2-b 1)/(m 2-m 1) ] + k pi between the measuring rod of the orientation rod and the paraxial region; k =0 or 1;
included angle between measuring rod of directional rod and direction of occlusal surface
Tilt direction of the measuring rod of the orientation bar:
if m1< m2, b1< b2, then in the mesial-buccal direction,
if m1< m2, b1= b2, then tilt towards the mesial,
if m1< m2, b1> b2, leaning towards the mesial tongue,
if m1= m2, b1< b2, then it is tilted to the buccal side,
if m1= m2, b1= b2, then there is no tilt,
if m1= m2, b1> b2, inclined to the lingual side,
if m1> m2, b1< b2, sloping towards the far middle cheek,
if m1> m2, b1= b2, tilting to the far center,
if m1> m2, b2< b1, tilt towards the distal tongue;
9) And adjusting the depth and the angle of the next-stage spare hole according to the offset obtained in the previous step, and repeating the calculation process until the digitalized auxiliary planting hole is prepared to the last stage.
Wherein the method of registration of the pointing stick data onto the C1 pointing stick: based on feature registration, the registration method comprises the following steps: fitting a plane according to the upper end plane of the oral-scanning fixed point rod, fitting a central axis according to the cylindrical curved surface of the fixed point rod, aligning based on two characteristics of the plane and the axis, and registering the fixed point rod data designed in the forward direction into the oral three-dimensional scanning data.
The central axis of the C2 directional rod and the bottom plane of the directional rod are root plane, and the central axis of the C2 directional rod and the top plane of the directional rod are crown plane.
The total length of the fixed point rod is 14mm, the upper end cylinder is a three-dimensional scanning area, the diameter is 4.8mm, the height is 2.6mm, the diameter of the lower cylinder is 2.2mm, the length is 7.8mm, the bottom of the cylinder is a ball table with the diameter of 2.2mm and the height of 1mm, grooves are respectively designed at the positions of the fixed point rod with the heights of 4mm, 6mm and 8mm, and clinical backup hole depth reference is facilitated; the upper and lower cylinders are connected by a truncated cone with the height of 2.6 mm.
Wherein the total length of the orientation rod is 22mm; the upper end cylinder is a three-dimensional scanning area, the diameter is 4.8mm, and the height is 4mm; designing an ideal implant diameter of 4.8mm according to the step-by-step hole preparation size, and preparing holes by using twist drills of 2.2mm, 2.8mm, 3.5mm and 4.2mm in sequence, wherein 2.2mm is a first-step hole preparation; 2.8mm is a second-stage prepared hole; 3.5mm is a third pole spare hole; 4.2mm is a fourth-stage prepared hole, the lower cylinder is a measuring rod, the diameters of the lower cylinder are respectively set to be 2.2mm, 2.8mm, 3.5mm and 4.2mm, the length of the lower cylinder is 15.3mm, the bottom of the cylinder is a ball table with the diameters of 2.2mm, 2.8mm, 3.5mm and 4.2mm and the height of 1mm, grooves are respectively designed at the positions of 4mm, 6mm, 8mm, 10-12mm and 14mm of the height of the orientation rod, and the depth reference of the clinical prepared hole is facilitated; the upper and lower cylinders are connected by a circular table with the height of 1.7 mm.
As described above, the present invention can be more fully realized. The above description is only a reasonable embodiment of the present invention, and the scope of the present invention includes but is not limited to the above description, and any insubstantial modifications of the technical solution of the present invention by those skilled in the art are included in the scope of the present invention.
Claims (5)
1. A digital control method for oral cavity implantation pit preparation is characterized by comprising the following steps:
1) Before preparation of a digital auxiliary planting cavity, according to three-dimensional scanning data and cbct data in a patient's mouth, defining a position which is designed before a mimics software operation and takes repairing as a guide as an ideal implant position, defining the implant as an ideal implant, wherein the height of the implant is h, the intersection point Pv of the long axis of the ideal implant and the crest of an alveolar ridge is output, and the three-dimensional scanning data A1 in the mouth and the ideal implant data B1 which have relative position relation are output;
2) Establishing a coordinate system: taking the central point of the neck plane of the ideal implant as an origin O, the mesial direction as the M-axis direction, the buccal side direction as the B-axis direction and the coplanar direction as the C-axis direction, and simultaneously dividing the ideal implant platform into four quadrants, namely a mesial cheek, a distal tongue and a mesial tongue, wherein the Pv coordinate is (0, p);
3) Planting hole primary positioning: in the preliminary stage of the digital auxiliary planting of the pits, firstly using a ball drill to fix points, using a 2.2mm drill to initially position, inserting a fixed point rod when the depth of the pits is about h/2, and carrying out intraoral three-dimensional scanning after positioning to obtain intraoral three-dimensional scanning data C1 with the fixed point rod;
4) Keeping A1 and B1 still, registering C1 to A1 according to dentition registration, registering the designed fixed point rod data to the C1 fixed point rod, wherein the coordinates of the intersection point Pr of the long axis of the C1 fixed point rod and the crest of the alveolar ridge are (m, B, C);
5) And (3) fixed point offset calculation: offset distance
If m is>0,b>0, adjust PrPv in the mesio-lingual direction if m>0,b<0, adjust PrPv in the mesial-buccal direction if m<0,b>0, adjust PrPv in the mesio-lingual direction, if m<0,b<0, adjusting PrPv towards the medial buccal side, and forming an included angle arctan (b/m) + k pi with the medial axis; k =0 or 1;
6) Adjusting the fixed point position according to the offset distance and the angle until the clinical requirement is met;
7) Preparing holes by using a 2.2mm twist drill with the depth of h in the preparation of the digital auxiliary planting holes, inserting a designed orientation rod, and carrying out intraoral three-dimensional scanning after the orientation rod is in place to obtain three-dimensional scanning data C2 of a measuring rod with the orientation rod;
8) And (3) calculating the offset of the backup hole: keeping A and B still, and registering C2 to A1 according to dentition registration; based on feature registration, registering the designed measuring rod data with the diameter of 2.2mm to a C2 orientation rod; intersection points of the central axis of the C2 orientation rod and the bottom plane and the top plane of the orientation rod are Pa (m 1, b1, C1) and Pb (m 2, b2, C2) respectively; the center point of the corresponding actual implant neck plane is O '(m 0, b0, c 0), the calculated O' coordinates m0= m1+ h (m 2-m 1)/PaPb, b0= b1+ h (b 2-b 1)/PaPb, c0= c1+ h (c 2-c 1)/PaPb;
the included angle theta = arctan [ (b 2-b 1)/(m 2-m 1) ] + k pi between the measuring rod of the orientation rod and the paraxial region; k =0 or 1;
included angle between measuring rod of directional rod and direction of occlusal surface
Tilt direction of the measuring rod of the orientation bar:
if m1< m2, b1< b2, then it is inclined toward the mesial-buccal side,
if m1< m2, b1= b2, then tilt towards the mesial,
if m1< m2, b1> b2, leaning towards the mesial tongue,
if m1= m2, b1< b2, then it is tilted to the buccal side,
if m1= m2, b1= b2, then there is no tilt,
if m1= m2, b1> b2, inclined to the lingual side,
if m1> m2, b1< b2, tilting towards the far middle cheek,
if m1> m2, b1= b2, tilting to the far center,
if m1> m2, b2< b1, tilt towards the distal tongue;
9) And adjusting the depth and the angle of the next-stage spare hole according to the offset obtained in the previous step, and repeating the calculation process until the digitalized auxiliary planting hole is prepared to the last stage.
2. The method for digitally controlling the preparation of an oral cavity implant pocket according to claim 1, wherein: the method for registering the pointing stick data onto the C1 pointing stick comprises the following steps: based on feature registration, the registration method comprises the following steps: fitting out a plane according to the upper end plane of the oral scanning fixed point rod, fitting out a central axis according to the cylindrical curved surface of the fixed point rod, aligning based on two characteristics of the plane and the axis, and registering the fixed point rod data designed in the forward direction into the oral three-dimensional scanning data.
3. The method for digitally controlling the preparation of an oral cavity implant pocket according to claim 1, wherein: the central axis of the C2 directional rod and the bottom plane of the directional rod are root plane, and the central axis of the C2 directional rod and the top plane of the directional rod are crown plane.
4. The pointing stick for use in a digital control method of oral implant cavity preparation as claimed in claim 1, wherein: the total length of the fixed point rod is 14mm, the upper end cylinder is a three-dimensional scanning area, the diameter is 4.8mm, the height is 2.6mm, the diameter of the lower cylinder is 2.2mm, the length is 7.8mm, the bottom of the cylinder is a ball table with the diameter of 2.2mm and the height of 1mm, grooves are respectively designed at the positions of the fixed point rod with the heights of 4mm, 6mm and 8mm, and clinical prepared hole depth reference is facilitated; the upper and lower cylinders are connected by a truncated cone with the height of 2.6 mm.
5. The orienting rod for the digital control method of the oral implant cavity preparation as recited in claim 1, wherein: the total length of the orientation rod is 22mm; the upper end cylinder is a three-dimensional scanning area, the diameter is 4.8mm, and the height is 4mm; designing an ideal implant with the diameter of 4.8mm according to the size of the step-by-step prepared holes, and preparing the holes by using twist drills with the diameters of 2.2mm, 2.8mm, 3.5mm and 4.2mm in sequence, wherein the 2.2mm is a first-step prepared hole; 2.8mm is a second-stage prepared hole; 3.5mm is a third pole spare hole; 4.2mm is a fourth-stage prepared hole, the lower cylinder is a measuring rod, the diameters of the lower cylinder are respectively set to be 2.2mm, 2.8mm, 3.5mm and 4.2mm, the length of the lower cylinder is 15.3mm, the bottom of the cylinder is a ball table with the diameters of 2.2mm, 2.8mm, 3.5mm and 4.2mm and the height of 1mm, grooves are respectively designed at the positions of 4mm, 6mm, 8mm, 10-12mm and 14mm of the height of the orientation rod, and the depth reference of the clinical prepared hole is facilitated; the upper and lower cylinders are connected by a circular table with the height of 1.7 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211427076.3A CN115778586A (en) | 2022-11-15 | 2022-11-15 | Oral cavity planting cavity preparation digital control method, fixed point rod and directional rod |
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| CN202211427076.3A CN115778586A (en) | 2022-11-15 | 2022-11-15 | Oral cavity planting cavity preparation digital control method, fixed point rod and directional rod |
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| CN115778586A true CN115778586A (en) | 2023-03-14 |
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| CN202211427076.3A Pending CN115778586A (en) | 2022-11-15 | 2022-11-15 | Oral cavity planting cavity preparation digital control method, fixed point rod and directional rod |
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2022
- 2022-11-15 CN CN202211427076.3A patent/CN115778586A/en active Pending
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