Roughening acrylic teeth

Roughening acrylic teeth

The contact surface is roughened to achieve adequate retention between the acrylic tooth and the denture base acrylic. This can be done with special groove or retention milling cutters or fine tungsten burs or by sandblasting. The following simple rules should be observed when sandblasting acrylic teeth:

  1. Reduce pressure to 1-2 bar.
  2. Select a fine, 50 µm blasting medium.
  3. Reduce the amount of blasting if there is an option on the device.
  4. Always blast vertically onto the surface to be roughened.

integral® tooth line

Juvenile tooth mould (canine tips, incisal edges, cusp tips)

With prefabricated teeth, the dental technician should be able to use the entire range of design options with regard to age-appropriate and function-appropriate design. This is only possible with juvenile teeth through targeted grinding in the articulator, because grinding, like natural teeth do, makes more sense than applying substance. The functional facets adjust by themselves, taking into account the occlusion concepts, and have a special aesthetic effect.

Do the steep cusp inclination of the integral® cause irritation, especially in older patients?

After many years of experience, this is hardly to be expected. According to MDT Polz the cusp inclination is not as steep as the first impression suggests. Due to the simple tooth-to-tooth relationship, a contact relationship in the centric can easily be achieved without “locking in” the patient. The occlusal surfaces have a high degree of masticating effectiveness and require less masticating force than it is on average with flat-cusp teeth, which protects the tegument.

A certain presence of cusp substance is necessary for a patient-friendly design of the eccentric / dynamic types of occlusion. With targeted grinding measures, the integral® posterior tooth can be adapted to all types of occlusion and degrees of abrasion in a very short time without losing its centric position.

CBI - mould classification

The design of the integral® anteriors is based on extensive studies by the Free University of Berlin and clearly has the characteristics of natural teeth in terms of mould and size. With the CBI® system it is easily possible to produce a natural looking denture. The “classic tooth moulds” are often products of imagination and their moulds are not sufficiently based on nature. They are therefore very easy to recognise in the mouth as denture teeth and are less aesthetically pleasing.

Tooth neck design

When designing the "red aesthetics", the impression should be that the tooth has grown out of the gingiva. Due to the angulation in the tooth neck area, the artificial tooth can be modeled into the gingiva according to age. The technician is given the opportunity to adapt the tooth to the actual biological conditions depending on the modelation. The tooth is also better anchored in the base material.

Lingualised set-up acc. to Gerber

Absolutely yes. The first premolars show a long laterotrusion facet and contact relationships as required by Gerber. The A-contacts (buccal cusp contacts) are abandoned on the other posterior teeth. The centric / static occlusion is very stable via the palatal cusp support and can be varied as required with tooth-guided eccentric / dynamic lower jaw movements.