Relines and Repairs+ Balanced, Monoplane, etc

What causes resorption

lack of internal stimulation provided by the tooth root when teeth are extracted/gone

What 2 directions does bone shrink?

1. Vertically (height)

2. Horizontally (width)

Bone resorption leads to a what

poorly fitting denture

What are the 2 ways dentures can be refitted to restore proper fit

1. Reline

2. Rebase

When do patients require a refit

every 2-4 years

Reline

to resurface the tissue side of a denture with new material so it will fit the tissue and remaining bone structure more accurately

• daily task in lab

What 2 things can relines represent a solution to

1. denture that was unstable on the ridge

2. patient’s occlusal vertical dimension is showing progressive overclosure

rebase

to replace the entire denture base material while maintaining occlusal relations of the artificial teeth

what kind of acrylic do you use for relines or rebases

auto-polymerizing/cold-cure/self-cure

soldering

process of joining 2 or more metal surfaces by melting and flowing a filler metal into the joint

• filler metal has lower melting point than adjoining metal

flux

substance that is applied to a metal to prevent the formation of an oxide film or to remove an already formed oxide film

paste flux

powdered flux that has been combined with petrolatum

• offers the most control

powdered flux

best suited for casting procedures

liquid flux

to form a liquid flux, mix powdered flux with either water of alchohol

• particularly suited for soldering with an electric soldering unit

What are the 3 types of soldering

1. electric

2. torch

3. laser

electric soldering

intense heat located at the site of a fracture

torch soldering

is used when the solder joint is long or unusually bulky

laser welding

uses a laser that gives intense heat to a pin-point area

• fastest and cleanest method

What are the 3 components of an electric soldering machine

1. a transformer that can be varied in output

2. 2 electrodes

   • carbon

   • copper

3. Foot pedal