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dental amalgam proportion scale

https://mhc.andornot.com/en/permalink/artifact13537
Dates
1940
1970
circa 1940-1970
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020416 a-d
Description
Black plastic dental amalgam scale; rounded triangular base (a) with three rounded feet with three graduated sizes of silver metal rods and raised silver metal disc; scale (b), long tubes with cone-shaped receptacles at ends; one, with a silver metal screw on bottom marked for mercury, the larger r…
  5 images  
Accession Number
010020416 a-d
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dental Equipment
Dental Materials
Weights and Measures
MM= Dental Restoration, Permanent -- alloy/amalgam
Description
Black plastic dental amalgam scale; rounded triangular base (a) with three rounded feet with three graduated sizes of silver metal rods and raised silver metal disc; scale (b), long tubes with cone-shaped receptacles at ends; one, with a silver metal screw on bottom marked for mercury, the larger receptacle marked for alloy; adjustable silver metal bolt attached to each via square loop, with long pins coming down; pins rest on pair of metal rods stands on base as a pivot or balance, with the mercury receptacle over the raised disc; black plastic cone-shaped funnel (c); single sided paper instruction sheet (d) included.
Number Of Parts
4
Part Names
a - base - Size: Length 11.7 cm x Width 6.0 cm x Depth 4.4 cm
b - balance - Size: Length 15.0 cm x Width 2.5 cm x Depth 2.4 cm
c - funnel - Size: Depth 2.6 cm x Diam. 3.0 cm
d - instructions - Size: Length 27.5 cm x Width 21.3 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Maker
Crescent Dental Mfg. Co.
Site Made (City)
Chicago
Site Made (State)
Illinois
Site Made (Country)
United States of America
Dates
1940
1970
circa 1940-1970
Date Remarks
Based on design
Material
metal: silver
plastic: black
paper: tan
ink: black
Inscriptions
Embossed on base: "SILVERLOY // PROPORTION // SCALE // CRESCENT DENTAL MFG. CO. CHICAGO, U. S. A."; engraved on balance: "MERCURY // ALLOY // CRESCENT"
Permanent Location
(a-c) Storage Room 0010
0010-B
(d) Storage Room 2005
2005-2-5 Box 22
Condition Remarks
Metal balance on (b) slightly tarnished; edges of funnel (e) chipped
Copy Type
Original
Reference Types
JPG
Reference Comments
CD #1
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; this item was donated by Dr. Mark Trepanier from Farnham, Quebec; this scale was used to measure out the correct proportions of mercury and metal alloy, which together make up dental amalgam, used to fill cavities
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pair of dentures

https://mhc.andornot.com/en/permalink/artifact13162
Dates
1930
1950
circa 1930-1950
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020073 a-b
Description
Pair of dentures; upper (a) and lower (b) sections with white porcelain teeth affixed to brown and pink rubber gum formations; (a) has mold of entire upper palate while the u-shaped (b) has mold only of gums where teeth are present
  3 images  
Accession Number
010020073 a-b
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Denture, Complete
Description
Pair of dentures; upper (a) and lower (b) sections with white porcelain teeth affixed to brown and pink rubber gum formations; (a) has mold of entire upper palate while the u-shaped (b) has mold only of gums where teeth are present
Number Of Parts
2
Part Names
a - upper - Size: Length 5.8 cm x Width 5.2 cm x Depth 1.6 cm
b - lower - Size: Length 6.0 cm x Width 4.7 cm x Depth 1.2 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Site Made (City)
Vancouver
Site Made (State)
British Columbia
Site Made (Country)
Canada
Dates
1930
1950
circa 1930-1950
Date Remarks
Based on donor's remarks
Material
rubber: pink, brown
porcelain: white
Permanent Location
Storage Room 0010
0010-B
Condition Remarks
Two teeth missing on upper section; plastic is scratched, cracking at top of (a), inside (b) and where teeth meet rubber
Copy Type
Original
Reference Types
JPG
Reference Comments
CD #9
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; this item was donated by Dr. Graham Pettapiece from Victoria, British Columbia; a note with the object states that the dentures came from a patient, Cameron McIntosh, 70 years old, who had the dentures made fifty years prior in Vancouver; he remembered the dentist, perhaps Dr. Ford, had an office on the 2nd floor at the corner of Main and Hastings
Exhibit History
(b) On exhibit, "Teeth in Time," Case #2, 29 March 2011 - November 2014
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Crescent dental silver

https://mhc.andornot.com/en/permalink/artifact13285
Dates
1940
1970
circa 1940-1970
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020163 a-b
Description
Cylindrical clear glass bottle containing powdered silver; bottle (a) tapers inward at neck, round opening at top; yellow crescent-shaped label at front in middle printed with silver ink states manufacturing company; black plastic twist cap (b) is round with ridges around the edge; smaller black cy…
  3 images  
Accession Number
010020163 a-b
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dental Materials
Description
Cylindrical clear glass bottle containing powdered silver; bottle (a) tapers inward at neck, round opening at top; yellow crescent-shaped label at front in middle printed with silver ink states manufacturing company; black plastic twist cap (b) is round with ridges around the edge; smaller black cylinder, also with ridges around edge, on top; bottle is approximately half full.
Number Of Parts
2
Part Names
a - bottle - Size: Length 5.1 cm x Diam. 3.1 cm
b - cap - Size: Depth 2.4 cm x Diam. 3.2 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Maker
Crescent Dental Mfg. Co.
Site Made (City)
Lyons
Site Made (State)
Illinois
Site Made (Country)
United States of America
Dates
1940
1970
circa 1940-1970
Date Remarks
Based on design
Material
glass: clear
plastic: black
metal: silver
paper: yellow
ink: silver
Inscriptions
(a) Printed on front: "CRESCENT DENTAL // MFG. CO. // TRADE MARK"; embossed on bottom: "3-5"
Permanent Location
Storage Room 0010
0010-A3-7
Condition Remarks
Paper label slightly faded
Copy Type
Original
Reference Types
Book
JPG
Reference Comments
"Material in Dentistry: Principles and Applications, 2nd ed.", Jack L. Ferracane, 2001, p. 4, 122
CD #10
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; dental silver is used in the creation of amalgam fillings, which consist of 40-50% liquid mercury mixed with one or more metals; amalgams were first used in France in the early 19th century, but the modern 'recipe' was perfected by Dr. G. V. Black in the 1890s in Chicago; the metal usually contains a high percentage of silver (around 70%) and a mix of tin, copper and zinc; high copper amalgams are also available, where the silver content is much lower (as low as 40%) and the copper much more prevalent
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box of dental aluminum shells

https://mhc.andornot.com/en/permalink/artifact13292
Dates
1930
1950
circa 1930-1950
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020170 a-h
Description
Brown wooden rectangular box of aluminum shells; box (a) has white paper label printed with black ink on front stating product name and manufacturing information; white paper label inside lid illustrates product and shows different sizes from 1-20; box is separated into twenty different square comp…
  3 images  
Accession Number
010020170 a-h
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dental Equipment
Description
Brown wooden rectangular box of aluminum shells; box (a) has white paper label printed with black ink on front stating product name and manufacturing information; white paper label inside lid illustrates product and shows different sizes from 1-20; box is separated into twenty different square compartments by three horizontal brown paper inserts (b, c, d) with numbers from 6-20 printed with black ink and four vertical inserts (e, f, g, h) fitting on top; lid affixed to box at back via brown adhesive paper, closes via small silver metal nail going through holes on lid and box at front; box is filled with four to six aluminum shells of different sizes in each of the twenty compartments.
Number Of Parts
8
Part Names
a - box - Size: Length 16.0 cm x Width 12.1 cm x Depth 3.4 cm
b - insert - Size: Length 15.0 cm x Width 2.7 cm x Depth 0.1 cm
c - insert - Size: Length 15.0 cm x Width 2.7 cm x Depth 0.1 cm
d - insert - Size: Length 15.0 cm x Width 2.7 cm x Depth 0.1 cm
e - insert - Size: Length 11.0 cm x Width 2.7 cm x Depth 0.1 cm
f - insert - Size: Length 11.0 cm x Width 2.7 cm x Depth 0.1 cm
g - insert - Size: Length 11.0 cm x Width 2.7 cm x Depth 0.1 cm
h - insert - Size: Length 11.0 cm x Width 2.7 cm x Depth 0.1 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Maker
Blue Island Specialty Co., Inc.
Site Made (City)
Blue Island
Site Made (State)
Illinois
Site Made (Country)
United States of America
Dates
1930
1950
circa 1930-1950
Date Remarks
Based on packaging
Material
wood: brown
metal: silver
paper: white, brown
ink: black
Inscriptions
(a) Printed on front: "BISCO BRAND // SEAMLESS SHELLS // 20 DIFFERENT SIZES // GAUGE // 36 One-Half // Inch // ALUMINUM // SHELLS // BLUE ISLAND SPECIALTY CO., INC. Blue Island, Ill. // MANUFACTURERS // ORTHODONTIC APPLIANCES, SUPPLIES AND DENTAL SPECIALTIES"; (b) printed on insert: "6 7 8 9 10"; (c) printed on insert: "11 12 13 14 15"; (d) printed on insert: "16 17 18 19 20";
Permanent Location
Storage Room 0010
0010-B
Condition Remarks
Slight water damage on paper label; label is darkened
Copy Type
Original
Reference Types
Internet
JPG
Reference Comments
"My new smile" website
CD #10
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; aluminum shells are used as temporary crowns while the permanent crown is being created in a dental laboratory; aluminum is used because it is not very strong, since the temporary crown must be easily removed
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dental amalgam proportion scale

https://mhc.andornot.com/en/permalink/artifact13390
Dates
1940
1970
circa 1940-1970
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
Accession Number
010020268 a-b
Description
Black plastic dental amalgam scale; rounded triangular base (a) with three rounded feet with three graduated sizes of silver metal rods and raised silver metal disc; scale (b), long tube with cone-shaped receptacles at ends; one, with a silver metal screw on bottom marked for mercury, the larger re…
  3 images  
Accession Number
010020268 a-b
Collection
Dr. Ralph and Mrs. Olga Crawford Canadian Dental Collection
Category
Diagnostic & Treatment Artifacts
Classification
Dental
MeSH Heading
Dental Equipment
Dental Materials
Weights and Measures
MM= Dental Restoration, Permanent -- alloy/amalgam
Description
Black plastic dental amalgam scale; rounded triangular base (a) with three rounded feet with three graduated sizes of silver metal rods and raised silver metal disc; scale (b), long tube with cone-shaped receptacles at ends; one, with a silver metal screw on bottom marked for mercury, the larger receptacle marked for alloy; adjustable silver metal bolt attached to each via square loop, with long pins coming down; pins rest on pair of metal rods stands on base as a pivot or balance, with the mercury receptacle over the raised disc.
Number Of Parts
2
Part Names
a - base - Size: Length 11.7 cm x Width 6.0 cm x Depth 4.4 cm
b - balance - Size: Length 15.0 cm x Width 2.5 cm x Depth 2.4 cm
Provenance
Transfer from the Dental Canada Fund; previously housed in the Dentistry Canada Museum (Ottawa)
Maker
Crescent Dental Mfg. Co.
Site Made (City)
Chicago
Site Made (State)
Illinois
Site Made (Country)
United States of America
Dates
1940
1970
circa 1940-1970
Date Remarks
Based on design
Material
metal: silver
plastic: black
paper: tan
ink: black
Inscriptions
Embossed on base: "SILVERLOY // PROPORTION // SCALE // CRESCENT DENTAL MFG. CO. CHICAGO, U. S. A."; engraved on balance: "MERCURY // ALLOY // CRESCENT"
Permanent Location
(a-c) Storage Room 0010
0010-B
Condition Remarks
Metal balance on (b) slightly tarnished
Copy Type
Original
Reference Types
JPG
Reference Comments
CD #1
Research Facts
Dr Ralph and Mrs Olga Crawford donated their extensive Canadian dental collection to the DCF to create the museum in 1997; further donations were received while Dr Crawford was Curator Emeritus at the Dental Canada Museum until its closure in 2008; this item was donated by Dr. Mark Trepanier from Farnham, Quebec; this scale was used to measure out the correct proportions of mercury and metal alloy, which together make up dental amalgam, used to fill cavities
Images
Less detail