CA1178008A - Form for making a mold for dental models - Google Patents
Form for making a mold for dental modelsInfo
- Publication number
- CA1178008A CA1178008A CA000445686A CA445686A CA1178008A CA 1178008 A CA1178008 A CA 1178008A CA 000445686 A CA000445686 A CA 000445686A CA 445686 A CA445686 A CA 445686A CA 1178008 A CA1178008 A CA 1178008A
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- CA
- Canada
- Prior art keywords
- base
- mold
- insert
- stone
- void
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
ABSTRACT
. A form for making a flexible mold for the base of a dental model which base supports a tooth die. The form includes a substructure, a cast, attachable thereto, in-cluding a void for defining the exterior dimensions of the base, and an insert within the void for defining the interior dimensions of the base.
. A form for making a flexible mold for the base of a dental model which base supports a tooth die. The form includes a substructure, a cast, attachable thereto, in-cluding a void for defining the exterior dimensions of the base, and an insert within the void for defining the interior dimensions of the base.
Description
7~3{~
This application is a division of application Serial No. 395,273 filed 1 February, 1982.
The present invention relates to dental models and, more particularly, to molds and methods for using same to form the base of a dental model.
To accurately form and position false teeth or caps, a dentist normally makes a negative impression of the affected tooth or teeth. The negative impression may be partial, unilateral or bilateral, depending upon the extent of work to be done; the impression serves as a mold for developing a die of the patient's teeth. The negative impression is obtained by partially filling a tray with thermoplastic material. The filled tray is inserted within the patient's mouth such that the teeth and adjacent gums sink into and create a cavity within thermoplastic material. Shortly thereafter, the thermoplastic material will cure and retain an exact impression of the patient's teeth and adjacent gums. This is an essentially standard technique presently used by most dentists.
To form the die, a pourable casting stone, known as "pink stone" is poured into the negative impression up to at least the "margin" or base of the tooth. As described in more detail in United States Patent No. 3,937,773, assigned to the present assignee, after the pink stone has been compacted to preclude voids and remove any air bubbles, a retainer and included guide pins is placed upon the surface of the pink stone such that the extending spade ends of the pins are sunk into the pink stone below the margin. Preferably, the degree of extension of the pins is such that the surface of the retainer rests upon the surface of the pink stone. After the pink stone is at least partially cured, wax or similar lubricant is swathed upon the surface of the pink stone.
l ~'7~ 3 1 Presently, the base for the dental mold is ~ade
This application is a division of application Serial No. 395,273 filed 1 February, 1982.
The present invention relates to dental models and, more particularly, to molds and methods for using same to form the base of a dental model.
To accurately form and position false teeth or caps, a dentist normally makes a negative impression of the affected tooth or teeth. The negative impression may be partial, unilateral or bilateral, depending upon the extent of work to be done; the impression serves as a mold for developing a die of the patient's teeth. The negative impression is obtained by partially filling a tray with thermoplastic material. The filled tray is inserted within the patient's mouth such that the teeth and adjacent gums sink into and create a cavity within thermoplastic material. Shortly thereafter, the thermoplastic material will cure and retain an exact impression of the patient's teeth and adjacent gums. This is an essentially standard technique presently used by most dentists.
To form the die, a pourable casting stone, known as "pink stone" is poured into the negative impression up to at least the "margin" or base of the tooth. As described in more detail in United States Patent No. 3,937,773, assigned to the present assignee, after the pink stone has been compacted to preclude voids and remove any air bubbles, a retainer and included guide pins is placed upon the surface of the pink stone such that the extending spade ends of the pins are sunk into the pink stone below the margin. Preferably, the degree of extension of the pins is such that the surface of the retainer rests upon the surface of the pink stone. After the pink stone is at least partially cured, wax or similar lubricant is swathed upon the surface of the pink stone.
l ~'7~ 3 1 Presently, the base for the dental mold is ~ade
2 by one of t~Yo methods. First, additional pourable hardenable
3 stone, generally referred to as "yellow stone" t iS poured ~lithin
4 ¦ the negative impression to cover the pink stone and the retainer
5 ¦ with sufficient depth of yellow stone to form a solid base~ After
6 ¦ both the pink and the yellow stone have hardened, the tray and
7 ¦ supportea thermoplastic material is peeled a~ay to leave a
8 ¦ conventional dental model. Alternatively, a patty of yellow
9 ¦ ~tone is formed upon a glass or other smooth surface. The
10 ¦ partially or completely cured pink stone is placed thereupo.~ such
11 ¦ that the retainer extends into and is encapsulated by the
12 ¦ yellow stone. -
13
14 ¦ - Either of the presently used methods for making the
15 ¦ base of yellow stone requires substantlal technician time to
16 ! manually form the yellow stone into an initial shape. After
17 ¦ it is cured, further time is required for cutting and grinding
18 ¦ a~7ay excess yellow stone material. The time spent and material
19 I wasted necessarily adds to the cost o the dental model to the ultimate detriment of the patient.
22 In the presently use~ dental models, the mesial and 23 distal cuts to be made through the line of demarcation bet~een 2~ ¦ thè pink and yello~7 stone must be made at an angle with respect 25 ~ to horizontal or the base surface in order to provide sufficient Z6 ¦ clearance for the saw end. The depth of cut necessitated by 27 1 the CUttitlg anyle tends to ~eaken the structuJ-al integrity of 28 ~I the base resulting in ei~,_her mo-re frasile bases or bases \!hich 29 1l ha~e to be substantially more thick than other~ise necessary 30 '1I to acco~nmoda-te such ;;eakening without breakage during normal 3 -L 1l h~ndlin~
32 ~1 ~ither of the above processes Lor making the bases ~ 3 -(31)8 of dental models tends to result in each base being somewhat unique and individualized. When the dental models are placed upon a dental articulator to perform work thereon, a sub-stantial amount of time and expertise is necessary to properly attach and align the upper and lower coacting dental models to reproduce the relationship of the patient's jaws.
The requisite time for aligning the dental models is exacer-bated by the non-uniformity of the dental model base con-figurations and thicknesses and requires yet further time and effort to positionally orient each base upon its respective arm of the artlculator and to attach the base to the arm.
U ~
In accordance with the present invention -there is provided an apparatus for making a flexible mold for the base of a dental model which base supports a tooth die. The apparatus comprises in combination:
(a) a substructure;
(b) a cast attachable to the substructure, the cast including a void for defining the exterior dimensions of the base; and (c) an insert locatable within the void for defining the interior dimensions of the base, the insert including an overhang part for forming an inset in the base and delineating a platform as par-t of the base for support-ing the tooth die.
The apparatus may include means for forming indices in said mold to index a base developed within said mold, and may include a protrusion extending from the insert for defining a cavity in the mold to be formed.
For convenience the subject matter of both the present invention and the parent application Serial No. 395,273 filed 1 February, 1982 (and other divisional application associated therewith) is described together, by way of example only, with reference to the following drawings in which:
Figure 1 is an isometric view of a mold for making right or left quadrant bases for dental models;
Figure 2 is a cross-sectional view taken along lines 2-2, as shown in Figure l;
Figure 3 is an expanded view of the components shows in Figure l;
11'7~008 1 Figure 4 is an isometric view of the bottcm surface 2 formed through use of the mold shown in Figure l;
3 1 . .
4 ¦ . Figure 5 illustrates a reversably mountable element 5 ¦ for making right or left quadrant bases;
¦ . Figure 6 illustrates apparatus for formlng a fle~ible 8 ¦ mold to make the base of a dental model;
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10 j . Pigure 7 is an exploded view of the apparatus shown 11 ¦ in Figure 6;
13 Yigure 8 illustrates an insert for the apparatus shown 14 ¦ in Figure 6;
- 1~ I . ' i 16 ¦ Figure 9 illustrates the flexible mold formed by the 17 ¦ apparatus shown in Figure 8;
19 ¦ Figure 10 is a cross-sectional view taken along
22 In the presently use~ dental models, the mesial and 23 distal cuts to be made through the line of demarcation bet~een 2~ ¦ thè pink and yello~7 stone must be made at an angle with respect 25 ~ to horizontal or the base surface in order to provide sufficient Z6 ¦ clearance for the saw end. The depth of cut necessitated by 27 1 the CUttitlg anyle tends to ~eaken the structuJ-al integrity of 28 ~I the base resulting in ei~,_her mo-re frasile bases or bases \!hich 29 1l ha~e to be substantially more thick than other~ise necessary 30 '1I to acco~nmoda-te such ;;eakening without breakage during normal 3 -L 1l h~ndlin~
32 ~1 ~ither of the above processes Lor making the bases ~ 3 -(31)8 of dental models tends to result in each base being somewhat unique and individualized. When the dental models are placed upon a dental articulator to perform work thereon, a sub-stantial amount of time and expertise is necessary to properly attach and align the upper and lower coacting dental models to reproduce the relationship of the patient's jaws.
The requisite time for aligning the dental models is exacer-bated by the non-uniformity of the dental model base con-figurations and thicknesses and requires yet further time and effort to positionally orient each base upon its respective arm of the artlculator and to attach the base to the arm.
U ~
In accordance with the present invention -there is provided an apparatus for making a flexible mold for the base of a dental model which base supports a tooth die. The apparatus comprises in combination:
(a) a substructure;
(b) a cast attachable to the substructure, the cast including a void for defining the exterior dimensions of the base; and (c) an insert locatable within the void for defining the interior dimensions of the base, the insert including an overhang part for forming an inset in the base and delineating a platform as par-t of the base for support-ing the tooth die.
The apparatus may include means for forming indices in said mold to index a base developed within said mold, and may include a protrusion extending from the insert for defining a cavity in the mold to be formed.
For convenience the subject matter of both the present invention and the parent application Serial No. 395,273 filed 1 February, 1982 (and other divisional application associated therewith) is described together, by way of example only, with reference to the following drawings in which:
Figure 1 is an isometric view of a mold for making right or left quadrant bases for dental models;
Figure 2 is a cross-sectional view taken along lines 2-2, as shown in Figure l;
Figure 3 is an expanded view of the components shows in Figure l;
11'7~008 1 Figure 4 is an isometric view of the bottcm surface 2 formed through use of the mold shown in Figure l;
3 1 . .
4 ¦ . Figure 5 illustrates a reversably mountable element 5 ¦ for making right or left quadrant bases;
¦ . Figure 6 illustrates apparatus for formlng a fle~ible 8 ¦ mold to make the base of a dental model;
.g I
10 j . Pigure 7 is an exploded view of the apparatus shown 11 ¦ in Figure 6;
13 Yigure 8 illustrates an insert for the apparatus shown 14 ¦ in Figure 6;
- 1~ I . ' i 16 ¦ Figure 9 illustrates the flexible mold formed by the 17 ¦ apparatus shown in Figure 8;
19 ¦ Figure 10 is a cross-sectional view taken along
20 ¦ lines 10-lO, as shown in Figure 9;
22 Figure 11 is an isometric view illustratlng the dental model Lormed;
2~ 1 25 1 - Figure 12 is a cross-sectional view of a dental model 26 ¦ formed;
27 11 i 2~ ,I Figure 13 illustrates apparatus ~or forming a mold 29 1 tc) ma~e a un:i.l,-lteral `~,ase o~ a dental model;
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31 il Yi.qure 14 is a cross-sectional vie~l taken along 32 li lines 1~ , ac; .sho~n i.r~ Figure 13;
'I I
1! - 6 -.1 1 1~ 11'7~(108 1 Figure 15 is a top vie~ of the apparatus shown in 2 Figure 13;
3 I .
4 . Figure 16 is a cross-sectional view taken along lines 16-16, as shown in Figure 15; and 6 .' 7 . Figure 17 illustrates a flexible mold-formed by 8 the apparatus shown in Figure 13 and the dental model made 9 therefrom.
10 . ' ' ".
,11 Referring to Figure 1, there is shown a disasse~lblable 12 mold 10 for making a rigAt or left quadrant base 12 of a 13 dental model 14-having a die 16 attached thereto. The mold 14 includes a substructure 18 from which extend guide means, such as opposed channels 20, 22, a removable reversible insext 24 and 16 'a removable perimeter defining means such as wall 26 detachably 18 attachable to the insert.
19 - .The components of mold 10 and their mutual cooperation will ~e.described ~ith joint reference to Figures 1-5. .Normally;
22 Figure 11 is an isometric view illustratlng the dental model Lormed;
2~ 1 25 1 - Figure 12 is a cross-sectional view of a dental model 26 ¦ formed;
27 11 i 2~ ,I Figure 13 illustrates apparatus ~or forming a mold 29 1 tc) ma~e a un:i.l,-lteral `~,ase o~ a dental model;
~ O I I
31 il Yi.qure 14 is a cross-sectional vie~l taken along 32 li lines 1~ , ac; .sho~n i.r~ Figure 13;
'I I
1! - 6 -.1 1 1~ 11'7~(108 1 Figure 15 is a top vie~ of the apparatus shown in 2 Figure 13;
3 I .
4 . Figure 16 is a cross-sectional view taken along lines 16-16, as shown in Figure 15; and 6 .' 7 . Figure 17 illustrates a flexible mold-formed by 8 the apparatus shown in Figure 13 and the dental model made 9 therefrom.
10 . ' ' ".
,11 Referring to Figure 1, there is shown a disasse~lblable 12 mold 10 for making a rigAt or left quadrant base 12 of a 13 dental model 14-having a die 16 attached thereto. The mold 14 includes a substructure 18 from which extend guide means, such as opposed channels 20, 22, a removable reversible insext 24 and 16 'a removable perimeter defining means such as wall 26 detachably 18 attachable to the insert.
19 - .The components of mold 10 and their mutual cooperation will ~e.described ~ith joint reference to Figures 1-5. .Normally;
21 dental models,must be located upon a dental articulator in order
22 ¦¦ for a dentist or lab technician to perform work thereon and construct whatever prosthe~ic devices may be requîred to cure 24 ¦ or alleviate a patient's dental problem. To standardize the ¦.
25 ¦ attachment location and orienta~ion of the dental model, indexing ¦
25 ~ means, such as depressions 28, are formed in bottom surface 30 27 ¦~ of base 12 by nipples 29 extending upwardly from the surface of 28 ~ substructure 18. Thereby, each base formed by mold 10 wi.ll havea 29 1 unil-Grml.y posi.t;olled index.illg means for cooperative engaqement 30 ~ l~ith complementaxy ir.dexinq means permanently attached to an arm , 31 l¦ of an ar-ticulator. To avoid the need for mastic or other ~2 1 ~dhe~ Je s~ ,slances precently used to ~aintai.n a denta]. model 1'1'~8QU8 1 attached to the arm of an articulator, a magnet 32 is formed as 2 ¦ part of the bottom of base 12. The rnagnet cooperates with a 3 ~ commensurately located metal plate upon an arm of the 5 ~ arti~ulator. Alternatively, the locations of the magnet and plate may be reversed. Thereby, the dental model is maintained 61 in engagement with the arm of an articulator by magnet 32 and 7 index~d with respect thereto by means of depressions 28. The 8 1 location o~ magnet 32 in base 12 i5 predetermined by delineation 3 9 ~ or similar physical key means upon the surface of substructure 18.
101 . ' , , ''.
11 Insert 24 slidably cooperates with channels 20 and 22 to 12 ¦ removably locate the insert upon substructure 18. The insert 13 I includes a wall 36 of which lower wall 38 defines a part of the perimeter-of base 12. A plate 40 extends laterally from wall 36 15 ¦ and defines a void in the base to be formed. The configuratlon 16 of wall 36 and the location of plate 40 thereon is such that the 17 insert may be brought into siidable engagment with channels 20 18 and 22 to reorient the plate from right to left and vice ~ersa whereby the void formed may be reversed in position with respect l to base 12.
2~ 1 - ~all 26 includes ends 42 and 44, which ends are slidably
25 ¦ attachment location and orienta~ion of the dental model, indexing ¦
25 ~ means, such as depressions 28, are formed in bottom surface 30 27 ¦~ of base 12 by nipples 29 extending upwardly from the surface of 28 ~ substructure 18. Thereby, each base formed by mold 10 wi.ll havea 29 1 unil-Grml.y posi.t;olled index.illg means for cooperative engaqement 30 ~ l~ith complementaxy ir.dexinq means permanently attached to an arm , 31 l¦ of an ar-ticulator. To avoid the need for mastic or other ~2 1 ~dhe~ Je s~ ,slances precently used to ~aintai.n a denta]. model 1'1'~8QU8 1 attached to the arm of an articulator, a magnet 32 is formed as 2 ¦ part of the bottom of base 12. The rnagnet cooperates with a 3 ~ commensurately located metal plate upon an arm of the 5 ~ arti~ulator. Alternatively, the locations of the magnet and plate may be reversed. Thereby, the dental model is maintained 61 in engagement with the arm of an articulator by magnet 32 and 7 index~d with respect thereto by means of depressions 28. The 8 1 location o~ magnet 32 in base 12 i5 predetermined by delineation 3 9 ~ or similar physical key means upon the surface of substructure 18.
101 . ' , , ''.
11 Insert 24 slidably cooperates with channels 20 and 22 to 12 ¦ removably locate the insert upon substructure 18. The insert 13 I includes a wall 36 of which lower wall 38 defines a part of the perimeter-of base 12. A plate 40 extends laterally from wall 36 15 ¦ and defines a void in the base to be formed. The configuratlon 16 of wall 36 and the location of plate 40 thereon is such that the 17 insert may be brought into siidable engagment with channels 20 18 and 22 to reorient the plate from right to left and vice ~ersa whereby the void formed may be reversed in position with respect l to base 12.
2~ 1 - ~all 26 includes ends 42 and 44, which ends are slidably
23 ! en~agable with slots 46, 48 disposed in wall 36. The interior
24 ¦ surface of wall 26 defines the perimeter wall of base 12. It may
25 ! be noted that curved wall 50 of plate 40 is commensurate in
26 1 curvature ~7ith the lnterior surface of wall 26 and is located '¦ adjacent thereto upon assembly.
2~3,i , I
29 1l ~o form base 12 in mold 10, a magnet 32 is placed 'I ~,7ithin delineations 34. Insert 24 is seated within channels 20 anfd il 22 whereafter ~,all 25 is brought into retaining engagement with respective ores of slots 46 and 48. Yellow stone is poured into fl - ~
;1~ 8 l the resulting cavity. The yello~ stone will flo~ ~eneath 2 plate 40, as illustrated in Figure 2, arobnd and about magnet 32 3 ¦ and up to a level coiJicident ~ith the top of wall 26 and the top 4 ¦ surface of plate 40. A screed or the like may be employed to 5 ¦ obtain a level top surface of the yellow stone. Before the ¦ yellow stone sets, a tooth die 16, having a plurality of 7 ¦ do~els or pins 17 depending therefrom is placed upon the uncured 8 ¦ exposed surface of the base. Preferably, the extending part of 9 ¦ pins 17 is commensurate in length with the thickness of base 12, 10 ¦ as sho~n in Figure 2. After curing, wall- 26 and insert 24 are 11 disassembled and the base may be lifted off substructure 18 12 ¦ The resulting base will have a platform 13 which platform 13 ¦ supports die 16 in either a right or left quadrant, depending 14 ¦ upon the orientation of insert 24 15 I ~
16 ¦: To sever a model tooth 54 (see Figure 3) mesial and 17 ¦ distal saw cuts 56, 58 are made through die 16 to a point just 18 ¦ helow ~he-line of demarcation 60. Further depth of cut is unnecessary 2S platform 13 raises the saw blade sufficiently above ~0 1 the remaining part of the base to prevent interference with the 21 1 end of the saw blade (see Figure 12). ~s pointed out acove, ~2 ¦ in presently made dental models, the saw cut has to be made at 23 ¦ a substantial angle to accommodate the sa~ blade end. An indent _ 1 24 may be for~ed in the bottom surface 30 to aid in pushing upon 25 ! pins li to remove a model tooth. -
2~3,i , I
29 1l ~o form base 12 in mold 10, a magnet 32 is placed 'I ~,7ithin delineations 34. Insert 24 is seated within channels 20 anfd il 22 whereafter ~,all 25 is brought into retaining engagement with respective ores of slots 46 and 48. Yellow stone is poured into fl - ~
;1~ 8 l the resulting cavity. The yello~ stone will flo~ ~eneath 2 plate 40, as illustrated in Figure 2, arobnd and about magnet 32 3 ¦ and up to a level coiJicident ~ith the top of wall 26 and the top 4 ¦ surface of plate 40. A screed or the like may be employed to 5 ¦ obtain a level top surface of the yellow stone. Before the ¦ yellow stone sets, a tooth die 16, having a plurality of 7 ¦ do~els or pins 17 depending therefrom is placed upon the uncured 8 ¦ exposed surface of the base. Preferably, the extending part of 9 ¦ pins 17 is commensurate in length with the thickness of base 12, 10 ¦ as sho~n in Figure 2. After curing, wall- 26 and insert 24 are 11 disassembled and the base may be lifted off substructure 18 12 ¦ The resulting base will have a platform 13 which platform 13 ¦ supports die 16 in either a right or left quadrant, depending 14 ¦ upon the orientation of insert 24 15 I ~
16 ¦: To sever a model tooth 54 (see Figure 3) mesial and 17 ¦ distal saw cuts 56, 58 are made through die 16 to a point just 18 ¦ helow ~he-line of demarcation 60. Further depth of cut is unnecessary 2S platform 13 raises the saw blade sufficiently above ~0 1 the remaining part of the base to prevent interference with the 21 1 end of the saw blade (see Figure 12). ~s pointed out acove, ~2 ¦ in presently made dental models, the saw cut has to be made at 23 ¦ a substantial angle to accommodate the sa~ blade end. An indent _ 1 24 may be for~ed in the bottom surface 30 to aid in pushing upon 25 ! pins li to remove a model tooth. -
27 1 Base 12, when rer;loved from within mold 10, is of a
28 1I minimu~ perine~ter commensurate with the sides of die 16. It is29 smooth suYfacecl as a result of the surface smoothness of the ~ l' various components of the mold and is ready for use without further finishing l~y technicians. ~dditionally, the die is ~2 i inde~ed anc~ includes means for aclhering it to the arm of an . _g_ 11 7~008 articulator without further work by technicians. It is to Il be noted, that magnet 32 may be replaced by a steel plate or 3 the like which will be magnetically coupled to a magnet 4 located in the arm of the articulator.
6 ! Ref2rring jointly to Figures 6-12 there is shown 7 ¦I apparatus 62 for constructing a flexible mold 80 for a base 90 8 I of a dental model. ~he apparatus includes a substructure 64 supporting a cast 66. The cast has a void 68 extending through 11 ¦ the cast and commensurate in planform with-the conflguration of 12 the exterior dimensions of mold 80 to be formed. An insert 70, 13 representative of the exact configuration of base 90 to be ¦ developed from the mold produced by apparatus 62, is attached 14 1 to platform 64 by bolts or other mechanical means and located generally central to void 68. Bottom surace 72 of the insert Il includes depressions 74 for forming nipples in the mold, 17 i which nipples when reproduced by the base to be molded serve as 18 ! index means, as described above. Additionally, a raised 20 ¦ rectangular segment 76 extends upwardly from surface 72 to form ~l I a recess in the base to be molded, which recess is used to ¦ seat a magnet or a steel plate.
i As shown in greater detail in Figure 8, the insert 24 ¦ includes a raised part 78 commensurate in configuration with the platform of the base to be formed. Threaded cavities 80 27 I e~tend into raised part 78 to secure insert 70 by bolts or other Il means to substructure 64.
2~ ~l
6 ! Ref2rring jointly to Figures 6-12 there is shown 7 ¦I apparatus 62 for constructing a flexible mold 80 for a base 90 8 I of a dental model. ~he apparatus includes a substructure 64 supporting a cast 66. The cast has a void 68 extending through 11 ¦ the cast and commensurate in planform with-the conflguration of 12 the exterior dimensions of mold 80 to be formed. An insert 70, 13 representative of the exact configuration of base 90 to be ¦ developed from the mold produced by apparatus 62, is attached 14 1 to platform 64 by bolts or other mechanical means and located generally central to void 68. Bottom surace 72 of the insert Il includes depressions 74 for forming nipples in the mold, 17 i which nipples when reproduced by the base to be molded serve as 18 ! index means, as described above. Additionally, a raised 20 ¦ rectangular segment 76 extends upwardly from surface 72 to form ~l I a recess in the base to be molded, which recess is used to ¦ seat a magnet or a steel plate.
i As shown in greater detail in Figure 8, the insert 24 ¦ includes a raised part 78 commensurate in configuration with the platform of the base to be formed. Threaded cavities 80 27 I e~tend into raised part 78 to secure insert 70 by bolts or other Il means to substructure 64.
2~ ~l
29 I Figures ~ and lO illustrate flexible mold 80 which can be produced from apparatus 62 by pouring a cura~le rubber compound into void 68 of appaxatus 62 and allowing it to cure An exa!iple of a suitable rubber compound is sold by the ,¦ . !
,~ - 1 0 11'7~0V~ I
1 I Friedheim Tool Supply Company under the ~ark Jofre. The mold 2 1 includes nipples 82 ~hich will form depressions in the base to 3 ¦ ~e molded and serve as index means on attachment oE the base to 4 1 an arm of an artlculator. A recess 84 is sized to receive a S ~ steel plate or magnet which will locate and retain in place the S ~ opposite ele~ent to be lodged ~ithin the base to be formed. An 7 overhang 86 ser~es the same function as `nsert 40 of mold 10, as 8 sho~m in Figures 1 and 2; that is, it, in combination with side 9 wall 88, defines the outline of the platform to be formed as part of the base.
12 Base 90 formable from mold 80 is illustrated in 13 Figures 11 and 12. It includes a ralsed part referred to as 14 platform 92, which platform supports tooth die 94. Tapered 15 1 pins 96 or constant diameter pins 17 ~as shown in Figure 2) may 16 ¦ be used to key the die to the base. As particularly illustrated 17 ¦ in Figure 12, a saw blade 98 can be held and maintained 18 ¦ horizontal to make the mesial and distal cuts through die 94 to 1~ a point ]ust below line of demarcation 100. Thereafter, an I individual model tooth 102 or a section of model teeth can be 21 ~ replaceably removed for ~iorking on the dental model.
23 ¦ In operation, after formation of die 9~, poura~le 24 ¦ yellow stone is poured into mold 80 to a level even with the 25 1 top surface of the mold and assuming that either a magnet or a 26 ~ steel p]ate has already been inserted and positioned ~ithin 27 1l the mold. ~ie 94 is thereafter placed upon the exposed surface 23 11 of yellow stone intermediate the perimeter of overhang 86 and 2~ l~ side -~al] 88, as iliustrated in Figures 11 and 12. Priorly, a release sor,pound is piaced upon the expcsed surface of yellow il stone or upon the base of the die. After curing of the yello~
¦I stone, base 90 is formed. The base will have disposed therein ! * Trade mark l !
1 1 the index means as a result of the depressions created by 2 ¦ nipples 82 an~ includes a magnet or a steel plate for 3 ¦ removably attaching the base to an arm of an articulator. Removal ¦ of the base ~rom ~ithin the mold is accomplished by non-destructivi 5 ¦ distending the mold walls to release the base.
7 Apparatus 106 sho~m in Figures 13, 14, 15 and 16 is 8 employed to form a fle~ible mold for making a full base 108 9 (see Figure 17) for a dental model. The apparatus includes a substructure 110 supporting a cast 112. The cast includes a 11 ¦ void 11~ commensurate in size and planform with the exterior 12 ¦ dimensions of the mold to be formed. An insert 116 is disposed 13 ¦within void 114 and attached to substructure 110~ The insert is 14 ¦commensurate in configuration with the configuration of the base 15 ¦to be formed. The base includes a perimeter wall 118 to define 16 the perimeter of the base and the exterior perimeter o~ ¦
17 platform 122 and a depression 120 commensurate in depth, width 18 ¦and height of the interior dimensions of the platform of 19 ¦base 108 (see Figure 17~. A raised rectangular segment 124 de~elops a recess in the mold to receive either a steel plate 21 or a masnet. Depressions 126 form nipples 136 in the mold 22 1 ~hich result in depressions in base 108 which serve as index meansl 23 ! for attaching the dental model to the arm of an articulator. Bolt ~4 ¦Imeans, or the like, engaging threaded ca~ities are employed to 25 ¦ secure cast 112 and insert 116 to substructure 110.
261 . ~, 27 1 By pollring a cu-cable rubber compound into void 114 of ~ apparatus 106, a .le~ible mold 130, shGwn in Figure 17, is 29 1I produced~ The ~old ircludes an inner wall 132 for defining the
,~ - 1 0 11'7~0V~ I
1 I Friedheim Tool Supply Company under the ~ark Jofre. The mold 2 1 includes nipples 82 ~hich will form depressions in the base to 3 ¦ ~e molded and serve as index means on attachment oE the base to 4 1 an arm of an artlculator. A recess 84 is sized to receive a S ~ steel plate or magnet which will locate and retain in place the S ~ opposite ele~ent to be lodged ~ithin the base to be formed. An 7 overhang 86 ser~es the same function as `nsert 40 of mold 10, as 8 sho~m in Figures 1 and 2; that is, it, in combination with side 9 wall 88, defines the outline of the platform to be formed as part of the base.
12 Base 90 formable from mold 80 is illustrated in 13 Figures 11 and 12. It includes a ralsed part referred to as 14 platform 92, which platform supports tooth die 94. Tapered 15 1 pins 96 or constant diameter pins 17 ~as shown in Figure 2) may 16 ¦ be used to key the die to the base. As particularly illustrated 17 ¦ in Figure 12, a saw blade 98 can be held and maintained 18 ¦ horizontal to make the mesial and distal cuts through die 94 to 1~ a point ]ust below line of demarcation 100. Thereafter, an I individual model tooth 102 or a section of model teeth can be 21 ~ replaceably removed for ~iorking on the dental model.
23 ¦ In operation, after formation of die 9~, poura~le 24 ¦ yellow stone is poured into mold 80 to a level even with the 25 1 top surface of the mold and assuming that either a magnet or a 26 ~ steel p]ate has already been inserted and positioned ~ithin 27 1l the mold. ~ie 94 is thereafter placed upon the exposed surface 23 11 of yellow stone intermediate the perimeter of overhang 86 and 2~ l~ side -~al] 88, as iliustrated in Figures 11 and 12. Priorly, a release sor,pound is piaced upon the expcsed surface of yellow il stone or upon the base of the die. After curing of the yello~
¦I stone, base 90 is formed. The base will have disposed therein ! * Trade mark l !
1 1 the index means as a result of the depressions created by 2 ¦ nipples 82 an~ includes a magnet or a steel plate for 3 ¦ removably attaching the base to an arm of an articulator. Removal ¦ of the base ~rom ~ithin the mold is accomplished by non-destructivi 5 ¦ distending the mold walls to release the base.
7 Apparatus 106 sho~m in Figures 13, 14, 15 and 16 is 8 employed to form a fle~ible mold for making a full base 108 9 (see Figure 17) for a dental model. The apparatus includes a substructure 110 supporting a cast 112. The cast includes a 11 ¦ void 11~ commensurate in size and planform with the exterior 12 ¦ dimensions of the mold to be formed. An insert 116 is disposed 13 ¦within void 114 and attached to substructure 110~ The insert is 14 ¦commensurate in configuration with the configuration of the base 15 ¦to be formed. The base includes a perimeter wall 118 to define 16 the perimeter of the base and the exterior perimeter o~ ¦
17 platform 122 and a depression 120 commensurate in depth, width 18 ¦and height of the interior dimensions of the platform of 19 ¦base 108 (see Figure 17~. A raised rectangular segment 124 de~elops a recess in the mold to receive either a steel plate 21 or a masnet. Depressions 126 form nipples 136 in the mold 22 1 ~hich result in depressions in base 108 which serve as index meansl 23 ! for attaching the dental model to the arm of an articulator. Bolt ~4 ¦Imeans, or the like, engaging threaded ca~ities are employed to 25 ¦ secure cast 112 and insert 116 to substructure 110.
261 . ~, 27 1 By pollring a cu-cable rubber compound into void 114 of ~ apparatus 106, a .le~ible mold 130, shGwn in Figure 17, is 29 1I produced~ The ~old ircludes an inner wall 132 for defining the
30 llperimeter of -the base, a tongue or overhallg 134 for defining
31 Ithe height and ~lidth o~ platform 122, nipples 136 for producing 3Z linde~ means in the bottcm surface of the hase an(l eithcr an Il ~
lL ~()()8 1 im~*dded steel plate or magnet 1:38 for maintaining in place 2 the base with a magnetically complementary element. ~fter 3 the yellow stone h~s been poured within mold 130, die 140 is 4 ¦ located thereupon, as described in detail above. Upon curing 5 ¦ of the base, it may be removed from t~ithin mold 130 by non-6 destructively distending the mold walls to release the cured 7 ¦ dental model.
B ¦
9 ~ While the princip1es of the invention have now been 10 I made clear in an illustrative embodiment, there will be 11 I immediately obvious to those skilled in the art many modifications 12 of structure, arrangement, proportions, elements, materials, 13 and components, used in the practice of the invention which are 14 particularly adapted for specific environments and operating 15 1 requirements without departing from those principles.
16 1 ~ -~
,2 ~5 11 1 26 l1 l 27 , 29 l 30 li
lL ~()()8 1 im~*dded steel plate or magnet 1:38 for maintaining in place 2 the base with a magnetically complementary element. ~fter 3 the yellow stone h~s been poured within mold 130, die 140 is 4 ¦ located thereupon, as described in detail above. Upon curing 5 ¦ of the base, it may be removed from t~ithin mold 130 by non-6 destructively distending the mold walls to release the cured 7 ¦ dental model.
B ¦
9 ~ While the princip1es of the invention have now been 10 I made clear in an illustrative embodiment, there will be 11 I immediately obvious to those skilled in the art many modifications 12 of structure, arrangement, proportions, elements, materials, 13 and components, used in the practice of the invention which are 14 particularly adapted for specific environments and operating 15 1 requirements without departing from those principles.
16 1 ~ -~
,2 ~5 11 1 26 l1 l 27 , 29 l 30 li
32 , Il - 13 -'I I
Claims (3)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. Apparatus for making a flexible mold for the base of a dental model and which base supports a tooth die, said apparatus comprising in combination:
(a) a substructure;
(b) a cast attachable to said substructure, said cast including a void for defining the exterior dimensions of the base; and (c) an insert locatable within the void for defining the interior dimensions of the base, said insert including an overhang part for forming an inset in the base and delineating a platform as part of the base for supporting the tooth die.
(a) a substructure;
(b) a cast attachable to said substructure, said cast including a void for defining the exterior dimensions of the base; and (c) an insert locatable within the void for defining the interior dimensions of the base, said insert including an overhang part for forming an inset in the base and delineating a platform as part of the base for supporting the tooth die.
2. The apparatus as set forth in Claim 1 including a means for forming indices in said mold to index a base developed within said mold.
3. The apparatus as set forth in Claim 2 including a protrusion extending from said insert for defining a cavity in the mold to be formed.
- Page 1 of claims -
- Page 1 of claims -
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000445686A CA1178008A (en) | 1981-02-02 | 1984-01-19 | Form for making a mold for dental models |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US230,330 | 1981-02-02 | ||
| US06/230,330 US4378929A (en) | 1981-02-02 | 1981-02-02 | Mold for dental models base |
| CA000395273A CA1171210A (en) | 1981-02-02 | 1982-02-01 | Mold for dental models |
| CA000445686A CA1178008A (en) | 1981-02-02 | 1984-01-19 | Form for making a mold for dental models |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000445686A Division CA1178008A (en) | 1981-02-02 | 1984-01-19 | Form for making a mold for dental models |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000445686A Division CA1178008A (en) | 1981-02-02 | 1984-01-19 | Form for making a mold for dental models |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1178008A true CA1178008A (en) | 1984-11-20 |
Family
ID=27167196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000445686A Expired CA1178008A (en) | 1981-02-02 | 1984-01-19 | Form for making a mold for dental models |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1178008A (en) |
-
1984
- 1984-01-19 CA CA000445686A patent/CA1178008A/en not_active Expired
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