CN2163617Y - Internal fixator for fracture of thoracic and lumbar vertebra - Google Patents
Internal fixator for fracture of thoracic and lumbar vertebra Download PDFInfo
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- CN2163617Y CN2163617Y CN 93215069 CN93215069U CN2163617Y CN 2163617 Y CN2163617 Y CN 2163617Y CN 93215069 CN93215069 CN 93215069 CN 93215069 U CN93215069 U CN 93215069U CN 2163617 Y CN2163617 Y CN 2163617Y
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- lateral mass
- nail
- adjusting rod
- nail seat
- internal fixation
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Abstract
The utility model relates to an internal fixation device for the fracture of thoracic and lumbar vertebra, which comprises a regulation rod, a side block A, a side block B, a nail seat A, a nail seat B and a 'Dick' nail, On two side blocks, an angle disk is respectively arranged, a pointer is respectively arranged on the two nail seats, a rack-shaped rod body on the A end of the regulation rod and the fixing screw of the side block A are mutually matched. A lock plate is respectively between two side blocks and the nail seats, and circular arc-shaped inside and outside tooth surfaces are mutually meshed between the lock plates and the nail seats. Therefore, compared with the existing fixation device Dick, the utility model has the advantages that the utility model has the quantitative control of the backward convex deformity corrective position of a vertebral body and the restoration of the dissection heights of upper and lower vertebral bodies and fixed and reliable positioning. The utility model is a simple and easy internal fixation surgical device for the fracture of thoracic and lumbar vertebras. The adoption of the utility model can improve the success ratio of an operation.
Description
This utility model relates to a kind of thoracolumbar fractures treated with internal fixation apparatus, especially for the internal fixation device that the vertebral body kyphosis deformity in the thoracolumbar fractures treated with internal fixation art is corrected and the dissection of upper and lower vertebral body highly resets.
At present, apparatus commonly used in the thoracolumbar fractures treated with internal fixation art is the Dick apparatus, it comprises adjusting rod, lateral mass A, lateral mass B, nail seat A, nail seat B, Dick nail, lateral mass A and lateral mass B are in the two ends of adjusting rod respectively, between lateral mass A and the nail seat A, is connected by the lateral mass minor axis between lateral mass B and the nail seat B, two pieces of Dick nails pass a nail A separately, follow closely a B.Because the distance between this Dick apparatus lateral mass A and the lateral mass B is to regulate with the location by two pairs of nuts on the screw shaped adjusting rod to dissect resetting of height to reach upper and lower vertebral body, this adjusting is done by rule of thumb with the location, reset height is wayward, and the loosening of adjusting rod top nut usually can appear and to make upper and lower vertebral body dissect resetting of height insecure, the spacing of upper and lower vertebral body does not only have and struts, and can shorten on the contrary sometimes; Because between this Dick apparatus lateral mass A and nail seat A, lateral mass B and the nail seat B is to come localized by contrate gear, and tooth is little, as long as the nut on the lateral mass minor axis unclamps slightly or do not tighten, the nail toilet can break away from lateral mass, cause cone kyphosis deformity corrective positioning to change, do not reach the purpose of rectification.Moreover in the Dick internal fixation, normally the size of upper and lower vertebral body homonymy Dick being followed closely the extended line angle of cut is as the index of judging vertebral body kyphosis deformity correction result, and clinical effectiveness confirms that this is incorrect.In the Dick internal fixation, Dick nail vertebral body longitudinally the inserting needle direction be uncertain, shown in figure one, in the drift angle of certain limit, the Dick nail does not still depart from pedicle of vertebral arch at the vertical inserting needle of vertebral body.Shown in figure two, above vertebral body upper limb, hypocentrum lower edge are baseline, Dick nail extended line is the angle of cut with it, if the angle of cut of last vertebral body and Dick nail be θ 1 hypocentrum with the angle of cut of Dick nail for θ 2(Dick follow closely direction upwards get on the occasion of, get negative value downwards), upper and lower vertebral body Dick nail angle of cut θ is the kyphosis deformity corrective positioning, the Cobb angle is α after correcting, and then through mathematical reasoning, has
α＝θ＋θ2－θ1。
Before state clearly, Dick nail vertebral body longitudinally the inserting needle direction be uncertain, promptly the Dick nail is unknowable, and is difficult to measure with the upper and lower edge angle of cut of vertebral body θ 1, θ 2 in operation.Like this, even upper and lower vertebral body kyphosis deformity corrective positioning is as can be known, because (θ 1-θ 2) is unknowable, then correction result Cobb angle α is still unknowable.As seen, though the Dick apparatus has the function of correcting the vertebral body kyphosis deformity in the thoracolumbar fractures treated with internal fixation art, but still be difficult to accomplish accurate rectification.
The purpose of this utility model is to want to solve the problems referred to above that the Dick apparatus exists in the thoracolumbar fractures treated with internal fixation art, the thoracolumbar fractures treated with internal fixation apparatus that provides a kind of rectification that can quantitatively control the vertebral body kyphosis deformity in the thoracolumbar fractures treated with internal fixation art and vertebral body to dissect the recovery of height, this apparatus can also accomplish that vertebral body kyphosis deformity corrective positioning and upper and lower vertebral body dissect the positioning and fixing that resets of height, firm.
The purpose of this utility model reaches by following measure, it comprises adjusting rod ［ 1 ］, lateral mass A ［ 2 ］, lateral mass B ［ 9 ］, nail seat A ［ 5 ］, nail seat B ［ 11 ］, Dick nail ［ 4,14 ］, lateral mass A ［ 2 ］ and lateral mass B ［ 9 ］ are in the two ends of adjusting rod ［ 1 ］ respectively, between lateral mass A ［ 2 ］ and the nail seat A ［ 5 ］, be connected by the lateral mass minor axis between lateral mass B ［ 9 ］ and the nail seat B ［ 11 ］, two pieces of Dick nails ［ 4,14 ］ pass nail seat A ［ 5 ］, nail seat B ［ 11 ］, in lateral mass A ［ 2 ］, be respectively arranged with angle scale A ［ 6 ］ and angle scale B ［ 12 ］ on the lateral mass B ［ 9 ］, at nail seat A ［ 5 ］, be respectively arranged with pointer A ［ 7 ］ on the nail seat B ［ 11 ］, pointer B ［ 13 ］, in operation, as nail seat A ［ 5 ］, nail seat B ［ 11 ］ is based on lateral mass A ［ 2 ］, when lateral mass B ［ 9 ］ rotates, pointer A ［ 7 ］, pointer B ［ 13 ］ will be respectively in angle scale A ［ 6 ］, angle scale B ［ 12 ］ goes up and rotates an angle, thereby reaches the quantitative control to vertebral body kyphosis deformity corrective positioning.
The purpose of this utility model can also reach by following measure:
(1) angle scale A ［ 6 ］, the angle scale B ［ 12 ］ on lateral mass A ［ 2 ］, the lateral mass B ［ 9 ］ is dismountable, pointer A ［ 7 ］, pointer B ［ 13 ］ on nail seat A ［ 5 ］, the nail seat B ［ 11 ］ also are dismountable, in the operation, when vertebral body kyphosis deformity corrective positioning is located, they are promptly detachable.
(2) shaft of adjusting rod ［ 1 ］ A end is a spline-simulating, lateral mass A ［ 2 ］ is in the A end of adjusting rod ［ 1 ］, and can move freely along the shaft of spline-simulating, upward one logical heart screwed hole is arranged at lateral mass A ［ 2 ］ with respect to the toothed one side of adjusting rod ［ 1 ］, and dispose a hold-down screw ［ 15 ］, in the operation, after upper and lower vertebral body dissection highly resets, tighten hold-down screw ［ 15 ］, make the fixed-site of lateral mass A ［ 2 ］ on adjusting rod ［ 1 ］.
(3) between lateral mass A ［ 2 ］ and the nail seat A ［ 5 ］, be respectively arranged with jam plate A ［ 3 ］, jam plate B ［ 10 ］ between lateral mass B ［ 9 ］ and the nail B ［ 11 ］, jam plate A ［ 3 ］ and jam plate B ［ 10 ］ just as, there is a circular-arc inner toothed surface in one distal process source, corresponding with it, nail seat A ［ 5 ］ respectively has a circular-arc outer flank of tooth with the end of nail seat B ［ 11 ］, two flank of tooth are engaged, its other end has a square hole, and it partly matches with the lateral mass minor axis root square of lateral mass A ［ 2 ］, lateral mass B ［ 9 ］.Like this, between Dick nail on the nut on the lateral mass minor axis of tightening lateral mass A ［ 2 ］, lateral mass B ［ 9 ］, nail seat A ［ 5 ］, the nail seat B ［ 11 ］ and adjusting rod ［ 1 ］, just can be fixed in a certain angle position, to adapt to the corrigent needs of vertebral body kyphosis deformity in the operation.
(4) B of adjusting rod ［ 1 ］ end shaft is a screw shaped, lateral mass B ［ 9 ］ is in the B end of adjusting rod ［ 1 ］, between lateral mass B ［ 9 ］ and adjusting rod ［ 1 ］, be provided with the setting-up piece ［ 8 ］ of a contrate gear shape, lateral mass B ［ 9 ］ also is processed into a contrate gear with the contacted one side of setting-up piece ［ 8 ］, the both ends of the surface fluted disc is engaged, there is a square hole centre of setting-up piece ［ 8 ］, and it partly matches with the root square of adjusting rod ［ 1 ］ B end screw-like shaft.Like this, tighten the nut of adjusting rod ［ 1 ］ B end, the lateral mass minor axis of lateral mass B just can be fixed in a certain radial position of adjusting rod ［ 1 ］, and two pieces of Dick nails can not be in conplane situation in the operation to adapt to.
Fig. 1: be in the Dick internal fixation Dick nail at the sketch map of the vertical inserting needle of vertebral body.
Fig. 2: be vertebral body kyphosis deformity correction result sketch map in the Dick internal fixation.
Fig. 3: the structural representation (axonometric chart) that is this utility model embodiment.
Fig. 4: be the structural representation that the adjusting rod A end among this utility model embodiment is connected with lateral mass A.
Fig. 5,6: be the part figure of this utility model embodiment, wherein: (a) angle scale A, B and pointer A, B; (b) adjusting rod; (c) lateral mass A; (d) jam plate A, B; (e) nail seat A, B; (f) lateral mass B; (g) setting-up piece
Fig. 7: be to adopt this utility model that the vertebral body kyphosis deformity is corrected the front and back sketch map in the thoracolumbar fractures treated with internal fixation art.
Introduce an embodiment of the present utility model below in conjunction with accompanying drawing.As Fig. 3: a kind of thoracolumbar fractures treated with internal fixation apparatus, it comprises: adjusting rod ［ 1 ］, lateral mass A ［ 2 ］, jam plate A ［ 3 ］, Dick nail ［ 4,14 ］, nail seat A ［ 5 ］, an angle scale A ［ 6 ］, pointer A ［ 7 ］, setting-up piece ［ 8 ］, lateral mass B ［ 9 ］, jam plate B ［ 10 ］, nail seat B ［ 11 ］, an angle scale B ［ 12 ］, pointer B ［ 13 ］, hold-down screw ［ 15 ］; The A end shaft of adjusting rod ［ 1 ］ is that spline-simulating, B end shaft are screw shaped, lateral mass A ［ 2 ］, lateral mass B ［ 9 ］ are in A, the B two ends of adjusting rod ［ 1 ］ respectively, lateral mass A ［ 2 ］ goes up with respect to the toothed one side of adjusting rod ［ 1 ］ a logical heart screwed hole, and disposes a hold-down screw ［ 15 ］; Be provided with the setting-up piece ［ 8 ］ of a contrate gear shape between lateral mass B ［ 9 ］ and the adjusting rod ［ 1 ］; Between lateral mass A ［ 2 ］ and the nail seat A ［ 5 ］, be respectively arranged with jam plate A ［ 3 ］, jam plate B ［ 10 ］ between lateral mass B ［ 9 ］ and the nail B ［ 11 ］, nail seat A ［ 5 ］ and nail seat B ［ 11 ］ just as, jam plate A ［ 3 ］ and jam plate B ［ 10 ］ just as, two pieces of Dick nails ［ 4,14 ］ pass a nail seat A ［ 5 ］, a nail seat B ［ 11 ］ respectively; In lateral mass A ［ 2 ］, be respectively arranged with angle scale A ［ 6 ］ on the lateral mass B ［ 9 ］, angle scale B ［ 12 ］, at nail seat A ［ 5 ］, be respectively arranged with pointer A ［ 7 ］ on the nail seat B ［ 11 ］, pointer B ［ 13 ］, angle scale A ［ 6 ］, angle scale B ［ 12 ］ is inserted in lateral mass A ［ 2 ］ by two legs respectively, in last two the corresponding holes of lateral mass B ［ 9 ］, pointer A ［ 7 ］, pointer B ［ 13 ］ is inserted in nail seat A ［ 5 ］ respectively, on the nail seat B ［ 11 ］, when lateral mass A ［ 2 ］ and nail seat A ［ 5 ］ vertically, lateral mass B ［ 9 ］ and nail seat B ［ 11 ］ vertically are parallel to adjusting rod ［ 1 ］ respectively vertically the time, pointer A ［ 7 ］, pointer B ［ 13 ］ is in angle scale A ［ 6 ］ respectively, the centre position of angle scale B ［ 12 ］ (90 °).Be in the A end of adjusting rod ［ 1 ］ as Fig. 4: lateral mass A ［ 2 ］, tighten hold-down screw ［ 15 ］, hold-down screw ［ 15 ］ just conehead enter the between cog of adjusting rod ［ 1 ］.Can quantitatively control in the thoracolumbar fractures treated with internal fixation art upper and lower vertebral body according to the tooth position that hold-down screw ［ 15 ］ are positioned adjusting rod ［ 1 ］ like this and dissect resetting of height, and positioning and fixing.As Fig. 5,6:(a) scale range of angle scale A, B ［ 6,12 ］ is 40 ℃～140 ℃, centre symmetry line is 90 °; (b) A of adjusting rod ［ 1 ］ end shaft is a spline-simulating, and tooth pitch is selected 1mm～3mm, and adjusting rod ［ 1 ］ B end shaft is a screw shaped, and its root is square (meaning not shown in the figures); (c) side of lateral mass A ［ 2 ］ has the lateral mass minor axis, and its root is a square; (d) there is a circular-arc inner toothed surface in the distal process source of jam plate A, B ［ 3,10 ］, and the radian of two between cog is selected 4 °～8 ° and is advisable, and the other end has a square hole, and it partly matches with the lateral mass minor axis root square of lateral mass A, B ［ 2,9 ］; (e) end of nail seat A, B ［ 5,11 ］ has a circular-arc outer flank of tooth, and the radian selection of two between cog is advisable for 4 °～8 °, it and the circular-arc inner toothed surface interlock mutually in the distal process source of jam plate A, B ［ 3,10 ］; (f) side of lateral mass B ［ 9 ］ is processed into a contrate gear, the interlock mutually of it and setting-up piece ［ 8 ］, and opposite side has the lateral mass minor axis, and its root is a square; (g) setting-up piece ［ 8 ］ is a contrate gear, and there is a square hole centre, and it matches with the tetragonal body of adjusting rod ［ 1 ］ B end shaft root.When being expert at the thoracolumbar fractures treated with internal fixation art: (one) should measure left and right side spacing on the fracture vertebra, between hypocentrum according to positive bit slice behind the vertebral fracture, and the spacing that should keep between the just often upper and lower vertebral body of estimation, determine the distance that left and right side respectively should reset between upper and lower vertebral body, operation lateral mass A ［ 2 ］ makes it to be fixed in adjusting rod ［ 1 ］ and upward gets final product relevant position (being the tooth position).(2) should be according to protruding Cobb angle θ after the vertebral fracture lateral projection measurement fractured vertebral body, the rectification angle of establishing upper and lower vertebral body in the operation is respectively θ 1, θ 2, as figure seven, through mathematical reasoning, can correct back Cobb angle α:
α＋θ＝θ1＋θ2
(correcting the back is that the back is protruding, and α gets negative value; Correct the back and be lordosis, α get on the occasion of).According to the Cobb angle α that determines before the operation, the RA θ 1, the θ 2 that get upper and lower vertebral body are identical, i.e. the RAs of two pieces of Dick nails as can be known.(3) operating procedure: (a) place the thoracolumbar fractures treated with internal fixation apparatus, go up at angle scale A, B ［ 6,12 ］ and measure two pieces of Dick nails at upper and lower epicentral initial screw-rod angle.(b) operation lateral mass A ［ 2 ］ according to the distance that resets of fixed upper and lower vertebral body before the operation, is pushed into respective teeth position on the adjusting rod ［ 1 ］ with lateral mass A ［ 2 ］, tightens hold-down screw ［ 15 ］, makes lateral mass A ［ 2 ］ be fixed in adjusting rod ［ 1 ］.(c) operation nail seat A ［ 5 ］ (or the nail of the Dick on it), nail seat B ［ 11 ］ (or the nail of the Dick on it), make them turn over upper and lower vertebral body and correct the angle, at this moment angle scale A, B ［ 6,12 ］ go up pointer A, B ［ 7, what 13 ］ reflect is the screw-rod angle of correcting back Dick nail, and it is that initial screw-rod angle and vertebral body are corrected the angle sum; To follow closely then seat A, B ［ 5,11 ］ respectively with jam plate A, B ［ 3,10 ］ interlock, tighten the nut on the lateral mass minor axis of lateral mass A, B ［ 2,9 ］, make two pieces of Dick nail relative fixed after the rectification in certain angle position of adjusting rod ［ 1 ］.(d) unload angle scale A, B ［ 6,12 ］ pointer A, B ［ 7,13 ］ in the thoracolumbar fractures treated with internal fixation art, to settle two thoracolumbar fractures treated with internal fixation devices in the and arranged on left and right sides of vertebral body, when settling this apparatus, when two pieces of Dick nails are not in same plane, the warp-wise position of scalable lateral mass B ［ 9 ］ and adjusting rod ［ 1 ］, tighten the nut of adjusting rod B end then, lateral mass B ［ 9 ］ and setting-up piece ［ 8 ］ interlock, its lateral mass minor axis is fixed in the radial a certain position of adjusting rod ［ 1 ］.
The utility model since adopt angle scale respectively be set on two lateral mass, match with the lateral mass hold-down screw in the design that pointer respectively is set on two nail seats and spline-simulating adjusting rod shaft, two lateral mass and nail seat among arrange circular-arc between jam plate, jam plate and nail seat inside and outside the design such as flank of tooth phase interlock, it is thoracolumbar fracture internal fixation Dick apparatus commonly used at present, has centrum kyphosis deformity corrective positioning and upper hypocentrum and dissects fixing, the firm advantage of quantitative control and location that highly resets. It is a kind of operating theater instruments simple, that easily go, in clinical practice, adopts it will improve widely the success rate of thoracolumbar fracture internal fixation.
Claims (7)
1, a kind of thoracolumbar fractures treated with internal fixation apparatus, comprise adjusting rod, lateral mass A, lateral mass B, nail seat A, nail seat B, Dick nail, lateral mass A and lateral mass B are in the two ends of adjusting rod respectively, between lateral mass A and the nail seat A, be connected by the lateral mass minor axis between lateral mass B and the nail B, two pieces of Dick nails pass nail seat A, nail seat B separately, it is characterized in that: at lateral mass A[2], lateral mass B[9] on be respectively arranged with angle scale A[6], angle scale B[12], at a nail seat A[5], a nail seat B[11] on be respectively arranged with pointer A[7], pointer B[13].
2, thoracolumbar fractures treated with internal fixation apparatus according to claim 1 is characterized in that: pointer A ［ 7 ］, pointer B ［ 13 ］ on the angle scale A ［ 6 ］ on lateral mass A ［ 2 ］, the lateral mass B ［ 9 ］, angle scale B ［ 12 ］ and nail seat A ［ 5 ］, the nail seat B ［ 11 ］ are dismountable.
3, thoracolumbar fractures treated with internal fixation apparatus according to claim 1 and 2, it is characterized in that: the A end shaft of adjusting rod ［ 1 ］ is a spline-simulating, lateral mass A ［ 2 ］ is in the A end of adjusting rod ［ 1 ］, with respect to the toothed one side of adjusting rod ［ 1 ］ one logical heart screwed hole is arranged at lateral mass A ［ 2 ］, and dispose hold-down screw ［ 15 ］.
4, thoracolumbar fractures treated with internal fixation apparatus according to claim 1 and 2 is characterized in that, between lateral mass A ［ 2 ］ and the nail seat A ［ 5 ］, be respectively arranged with jam plate A ［ 3 ］, jam plate B ［ 10 ］ between lateral mass B ［ 9 ］ and the nail B ［ 11 ］.
5, thoracolumbar fractures treated with internal fixation apparatus according to claim 3 is characterized in that, between lateral mass A ［ 2 ］ and nail seat A ［ 5 ］, is respectively arranged with jam plate A ［ 3 ］, jam plate B ［ 10 ］ between lateral mass B ［ 9 ］ and the nail seat B ［ 11 ］.
6, thoracolumbar fractures treated with internal fixation apparatus according to claim 4, it is characterized in that: the B end shaft of adjusting rod ［ 1 ］ is a screw shaped, lateral mass B ［ 9 ］ is in the B end of adjusting rod ［ 1 ］, be provided with the setting-up piece ［ 8 ］ of a contrate gear shape between lateral mass B ［ 9 ］ and adjusting rod ［ 1 ］, lateral mass B ［ 9 ］ also is processed as a contrate gear with the contacted one side of setting-up piece ［ 8 ］.
7, thoracolumbar fractures treated with internal fixation device according to claim 5, it is characterized in that: the B end shaft of adjusting rod ［ 1 ］ is a screw shaped, lateral mass B ［ 9 ］ is in the B end of adjusting rod ［ 1 ］, be provided with the setting-up piece ［ 8 ］ of a contrate gear shape between lateral mass B ［ 9 ］ and adjusting rod ［ 1 ］, lateral mass B ［ 9 ］ also is processed as a contrate gear with the contacted one side of setting-up piece ［ 8 ］.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93215069 CN2163617Y (en) | 1993-06-04 | 1993-06-04 | Internal fixator for fracture of thoracic and lumbar vertebra |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93215069 CN2163617Y (en) | 1993-06-04 | 1993-06-04 | Internal fixator for fracture of thoracic and lumbar vertebra |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2163617Y true CN2163617Y (en) | 1994-05-04 |
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ID=33795671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93215069 Expired - Fee Related CN2163617Y (en) | 1993-06-04 | 1993-06-04 | Internal fixator for fracture of thoracic and lumbar vertebra |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2163617Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006066465A1 (en) * | 2004-12-23 | 2006-06-29 | Yang, Shouheng | A fusion implant for lumbal intervertebral columns |
| CN101229076B (en) * | 2008-02-20 | 2010-06-23 | 吴春生 | Fracture reverser |
| CN101138515B (en) * | 2006-09-05 | 2010-08-11 | 朱悦 | Lumbar dynamic internal fixing device |
| CN107260281A (en) * | 2017-07-10 | 2017-10-20 | 四川大学华西医院 | A kind of neck fracture or dislocation apparatus resetted for basilar impression |
| CN107582112A (en) * | 2017-09-08 | 2018-01-16 | 山东威高骨科材料股份有限公司 | Device for spreading between a kind of centrum |
-
1993
- 1993-06-04 CN CN 93215069 patent/CN2163617Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006066465A1 (en) * | 2004-12-23 | 2006-06-29 | Yang, Shouheng | A fusion implant for lumbal intervertebral columns |
| CN101138515B (en) * | 2006-09-05 | 2010-08-11 | 朱悦 | Lumbar dynamic internal fixing device |
| CN101229076B (en) * | 2008-02-20 | 2010-06-23 | 吴春生 | Fracture reverser |
| CN107260281A (en) * | 2017-07-10 | 2017-10-20 | 四川大学华西医院 | A kind of neck fracture or dislocation apparatus resetted for basilar impression |
| CN107260281B (en) * | 2017-07-10 | 2019-10-25 | 四川大学华西医院 | A kind of neck fracture or dislocation instrument resetted for basilar impression |
| CN107582112A (en) * | 2017-09-08 | 2018-01-16 | 山东威高骨科材料股份有限公司 | Device for spreading between a kind of centrum |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |