SECONDARY ANATOMO FUNCTIONAL IMPRESSIONS IN PPAC
1.Introduction and definition:
A secondary impression is essential when the definition of the primary impression is insufficient and the recording of both the remaining teeth, the mucosal support surfaces, the limit of muscular action and the play of the peripheral musculature is necessary for the stabilization, support and retention of the PAP.
So this type of impression is especially indicated in cases where the prosthesis supports are distributed on the teeth and the osteo-mucosal surfaces (mixed support). The difference in behavior of the dental tissues and the fibro-mucosa (tissue duality) causes an imbalance of the PAP. So it is essential to record the difference in depressibility between these different structures in order to obtain a working cast that allows the design of a prosthesis whose support will be harmoniously distributed on the teeth and the crests.
In addition to conventional impressions, digital impressions can currently be considered in certain situations of partial edentulism within the framework of CAD/CAM.
Note : secondary prints are called anatomical-functional because the recording of the surrounding tissues will be done dynamically by mobilization of the tissues (functional movements).
2-Compound prints
2;1;1 Global composite fingerprints
Indications :
-Inability to use a commercial impression tray;
-Classes I and II of medium and large extents;
-Large maxillary classes VI, V and IV;
-Maxillary composite prostheses.
First step : stabilization imprint
This is the imprint of the fibromucosal support surface and the delimitation of the edge of the prosthetic saddles with a medium viscosity material (eugenol-zinc oxide paste or medium viscosity elastomer).
Second stage : global impression This is the simultaneous impression of all the dental and fibro-mucosal supports by simultaneous spatulation of an elastic material of medium viscosity placed at the level of the teeth and of a fluid material placed at the level of the crests, on the stabilization impression.
2;1;2 Sectoral composite footprints
Corrected grinding technique
Indications:
-Mandibular classes I and II of small, medium and large extent.
-On condition that the chassis is precisely repositioned on the casting.
-In the presence of favorable morphology of the retro-incisive zone.
These impressions are made either under occlusal pressure or under digital pressure.
Technique using an overprint
Indications:
-Class I and II of small, medium and large extent without the possibility of precise repositioning of the frame on the cast and in the presence of favorable retro-incisal morphology;
-Mandibular classes I and II in the presence of composite prostheses;
-Large mandibular classes VI, IV and V.
.
Front Footprint Layout
casting, which allows the preservation of
information from the footprint
anatomofunctional
Ambulatory imprint
Indications:
-Unfavorable ridges: knife-edge, floating, inflammatory fibromucosal.
-Need for tissue conditioning.
-In case of PAP delivered with repeated injuries.
3-Conclusion:
Secondary or anatomical-functional impressions in removable partial metal prosthesis make it possible to guarantee the occlusal integration of prosthetic restorations.
SECONDARY ANATOMO FUNCTIONAL IMPRESSIONS IN PPAC
Deep cavities may require root canal treatment.
Dental veneers correct chipped or discolored teeth.
Misaligned teeth can cause uneven wear.
Dental implants preserve the bone structure of the jaw.
Fluoride mouthwashes help prevent cavities.
Decayed baby teeth can affect the position of permanent teeth.
An electric toothbrush cleans hard-to-reach areas more effectively.