A manual of dental mechanics.

  • Coles, Oakley, 1845-1906
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: A manual of dental mechanics. Source: Wellcome Collection.

    113/328 (page 81)
    you have tlie substance of the band rather thicker than an ordinary clasp; it may, after this, be filed down to a suitable form like a common band; we thus get the most perfect adaptation, with great strength and elasticity. It is generally a matter of difficulty to retain the clasps in their right position when removing them from the model or mouth after they have been fitted to each other. If the plate and bands attached can be removed easily on account of the sides of the teeth being perpen- dicular, then it is only necessary to see that you have the clasps attached to the plate securely before attempting removal; this may be done in several ways : first, and most com- monly, by means of resin and wax applied round the neck of the band where it joins the plate; secondly, by using sealing wax instead of the former substance, which possesses the ad- vantage of greater hardness, and breaks with a clean fracture instead of bending like resin and wax; thirdly, by coating over with a solution of soap the surface of the model near the plate, and then pouring on plaster and sand, and when it is set hard removing, if possible, with the plate and bftnds attached ; if not, adjusting them to it afterwards and then resting the under surface of the plate and the clasps in a mass of the 6