Ivoclar Vivadent SR Phonares II - Manual (Page 32)

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The SR Phonares teeth have been designed for implant prosthetics. This
means that the specific requirements of removable implant- supported
dentures have been incorporated into the design of the tooth moulds
and materials.
The sequence of steps to create a removable implant-retained
restoration follows the conventional rules of complete denture
prosthetics. However, there is a difference: Implant-supported
dentures have to withstand significantly higher forces that are exerted
on complex constructions involving several components. The teeth
and occlusal scheme are the components that transmit the chewing
forces. As in complete denture prosthetics, it is suggested that an
occlusal scheme that involves simultaneous working and non-working
contacts (group contacts) and eliminates anterior contacts during
excursive movements be applied.
The type of anchorage, i.e. the location of the superstructure,
presents another key element in the distribution of forces because
this plays a central role in the control of the chewing forces.
Basically, implant-retained restorations can be classified by the type of
anchorage into two categories: implant/tissue-supported dentures
and purely implant-supported dentures. Purely implant-supported
bridge constructions are exposed to essentially elevated chewing
forces because the patient cannot properly monitor these forces. This
fact should be considered and particular care should be applied in the
design of the tooth replacement.
imPlAnt ProsthetiCs