GB460817A - Improvements in or relating to dental impression supporting trays - Google Patents

Improvements in or relating to dental impression supporting trays

Info

Publication number
GB460817A
GB460817A GB583136A GB583136A GB460817A GB 460817 A GB460817 A GB 460817A GB 583136 A GB583136 A GB 583136A GB 583136 A GB583136 A GB 583136A GB 460817 A GB460817 A GB 460817A
Authority
GB
United Kingdom
Prior art keywords
tray
plaster
dental impression
fins
fin
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.)
Expired
Application number
GB583136A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB583136A priority Critical patent/GB460817A/en
Publication of GB460817A publication Critical patent/GB460817A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/0006—Impression trays

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

460,817. Dental impression trays. ARMSTRONG, J..J. V. (Kalvin, L.) Feb. 27, 1936, No. 5831. [Class 81 (ii)] A dental impression tray comprises a pressed body of sized cellulosic fabric, such as woven fabric or felted or moulded pulp, having a water-absorbent inner surface which does not adhere to the moist plaster, and a waterrepellent outer surface, produced, for example, by a collodion spray. In making the tray, two layers, for example, of three-ply buckram, already united by sizing such as starch, tapioca, glue or dextrin, are soaked, superposed and shaped in a heated die press. The outer surface is then waterproofed. A single heavy ply may alternatively be used. The tray is preferably formed with partition ridges 14, 16 to stiffen it and to weaken the plaster on definite lines to facilitate fracture. Parting fins for excluding plaster from parts of the impression, for example, where teeth are missing, may be disposed in slits in the tray. The fins, of semihard rubber or similar material, may take the form shown in Fig. 6, and are cut from a strip, Fig. 4. Due to the elongation of the web portion 17 when pulled through the slit, and the subsequent contraction, the fin is firmly fixed in position. A fin having a wedge-shaped head 22, for use in the ridges 14, 16 is shown in Fig. 2. The open mesh reinforcement disclosed in Specification 415,264 may be used in combination with the present tray.
GB583136A 1936-02-27 1936-02-27 Improvements in or relating to dental impression supporting trays Expired GB460817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB583136A GB460817A (en) 1936-02-27 1936-02-27 Improvements in or relating to dental impression supporting trays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB583136A GB460817A (en) 1936-02-27 1936-02-27 Improvements in or relating to dental impression supporting trays

Publications (1)

Publication Number Publication Date
GB460817A true GB460817A (en) 1937-02-04

Family

ID=9803433

Family Applications (1)

Application Number Title Priority Date Filing Date
GB583136A Expired GB460817A (en) 1936-02-27 1936-02-27 Improvements in or relating to dental impression supporting trays

Country Status (1)

Country Link
GB (1) GB460817A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530662A (en) * 1983-04-26 1985-07-23 Andersson A E Bror Impression tray for dental purposes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4530662A (en) * 1983-04-26 1985-07-23 Andersson A E Bror Impression tray for dental purposes

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