EP0634150A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process and device in connection with the production of a tooth, bridge, etc.
Assignee: Nobel Biocare AB
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Filing: 1994-07-05
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Granted: —
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Expires: 2014-07-05
Abstract
Abstract In the production of a tooth or bridge, for example, an outer contour of a rotating model is scanned by means of a scanning device (6). The model is mounted in or on a rotary holder (5) for the model. The latter is supported by the holder such that the scanned contour, above a preparation line on the model, can be exposed to the angled scanning device. This is directed towards a surface situated on the model below the preparation line. The holder is activated for rotation and the scanning device is activated for contour scanning. During the scanning, the scanning device and the holder are assigned a reciprocal movement in the vertical direction. It is proposed that Figure 2 should accompany the abstract.
Inventors
- 👤 Matts Andersson
- 👤 Anders Törnquist
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 22:03
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/002; A61C9/004; A61C9/0046; A61C9/0053; G; G05; G05B; G05B19/00; G05B19/02; G05B19/42; G05B19/4202; G05B19/4207; A61C9/0093
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
155 words
Process for scanning, in connection with the production of a tooth, bridge, etc., an outer contour (2a, 33a) of a rotating model (2) by means of a scanning device (6) which operates at a scanning angle (alpha) relative to the rotational axis (2') of the model, characterized in that the model is mounted in or on a rotary holder (5) for the model and the model is supported by the holder such that the scanned contour (2a), above a preparation line (2c) on the model, can be exposed to the angled scanning device, in that the scanning device is directed towards a surface (2e) situated on the model below the preparation line, and in that the holder (5) is activated for rotation (16) and the scanning device (6) is activated for contour scanning, during which contour scanning the scanning device and/or the holder are assigned a movement (15) in the vertical direction of the model.
Claim 2
Dependent Claim
85 words
Process according to Patent Claim 1, characterized in that the model is fitted in a fixture (23) and is adjusted in two mutually perpendicular directions (24a, 24b and 27a, 27b respectively) located in the same plane, such that the model is centred relative to the rotational axis of the model, in that the fixture is fitted on or in the holder (5) which is rotatably disposed, and in that the fixture is centred in or on the holder using centring and plumbline members (9, 32).
Claim 3
Dependent Claim
95 words
Process according to Patent Claim 1 or 2, characterized in that on the model (2) there is fixed, by means of a member (28), which can be disposed parallel with the rotational axis of the model and which interacts with the model material at the preparation line (2c), [lacuna], in that the contour is installed between the member and the rotational axis such that it can be exposed to the scanning member throughout its scanning movement, i.e. no negative recesses or scanning shadows are present, viewed in the scanning direction (7) of the scanning device.
Claim 4
Dependent Claim
51 words
Process according to Patent Claim 1, 2 or 3, characterized in that the contour (2a) is read by means of a reading member exhibiting a spherical front surface (14)/probe, which is brought to bear against the surface (2e) located below the said preparation line (2c) and against the said contour (2a).
Claim 5
Dependent Claim
86 words
Process according to any of the preceding patent claims, characterized in that the scanning member is actuated into contact with the said surface (2e) below the preparation line upon the commencement of the scanning operation, in that the scanning member is assigned bearing contact against the contour (2a) until the scanning member is brought into interaction with the upper part (2h) of the model, whereupon the scanning member is assigned an action in which the interaction of the scanning member with the model contour (2c) ceases.
Claim 6
Dependent Claim
60 words
Process according to any of the preceding patent claims, characterized in that the holder (5), during the scanning by the scanning member, is assigned a movement in the vertical direction (15) of the rotational axis, and in that the holder, once the scanning member has completed its scanning of the contour, is assigned a return movement to a starting position.
Claim 7
Dependent Claim
60 words
Process according to any of the preceding patent claims, characterized in that, upon the scanning of the contour (2c) by the reading member, a data file is input, which is re-created and used in a data-processing and production procedure, following the scanning function, for the tooth, bridge, etc. in question, which procedure can relate to production in titanium, ceramic, etc.
Claim 8
Dependent Claim
98 words
Process according to any of the preceding patent claims, characterized in that it is utilized also on a sleeve (33) applied to the said model, the contour (2a) of the model first being read for establishing the inner surface of the sleeve (33), which inner surface corresponds to the outer contour (2a) of the model, the sleeve is then applied to the model with great accuracy achieved, for example, with the aid of glue or equivalent, after which the outer contour (33) of the sleeve is read in an equivalent manner to the contour (2a) of the model.
Claim 9
Dependent Claim
69 words
Process according to Patent Claim 8, characterized in that the front part (14) of the reading member is brought into contact with that surface of the model situated below the preparation line at essentially the same place/point in the readings of the two contours (2c and 33a respectively), any minor adjustment to the vertical direction of the model being able to be made between the readings of the contours.
Claim 10
Dependent Claim
158 words
Device for permitting the production of a tooth, bridge, etc. according to Patent Claim 1, in which an outer surface (2a) can be read on a rotating model (2) by means of a reading device (6) which operates at a scanning angle (alpha) relative to the rotational axis (2') of the model, characterized in that a holder (5) is arranged to support the model such that the contour (2a) of the model above a preparation line (2c) on the model can be exposed throughout the reading or scanning from the angled scanning device (6), in that the scanning device can be adjusted in respect of a surface (2e) situated below the preparation line, in that the holder (5) can be activated for rotation and the reading device (6) can be activated for contour reading, and in that the scanning device and/or the holder can be activated for reciprocal vertical displacement movement between the scanning device and the holder.
Claim 11
Dependent Claim
68 words
Device according to Patent Claim 10, characterized in that the scanning device is arranged to be actuated into contact with the model upon the commencement of the scanning and to perform a return movement when the scanning device has completed its contour reading, and in that the scanning device (6) and/or the holder (5) are arranged to perform a return movement when the said contour scanning is completed.
Claim 12
Dependent Claim
71 words
Device according to Patent Claim 10 or 11, characterized in that the preparation model which can be read using the scanning device is configured having a clearly marked preparation line (boundary) (2c) below which there is preferably configured an indentation of no less than about one millimetre in height (H), calculated in the vertical direction of the model, and having a depth (D) of no greater than about half a millimetre.
Claim 13
Dependent Claim
54 words
Device according to Patent Claim 10, 11 or 12, characterized in that a fixture (23) is arranged to support the model such that it rotates around a rotational axis (2') without substantial wobbling, and in that the fixture is configured having manually operated adjusting members (25, 26, 28) for the alignment of the model.
References Cited (Backward Citations)
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