PEI partially spaced and PEI spaced totally spaced

PEI partially spaced

The ridges are floating loose mucosal hyperplasia in the underlying bone. Difficult to record, these soft and depressible areas likely to be distorted and displaced by conventional fingerprinting functional (Fig. 21). They are mostly unfavorable to lift full dentures and are therefore amenable to surgical resection whenever the condition of the patient allows it to retrieve, after healing, a healthy fibromucosa well adherent to the bone. In cases where these lesions are inoperable for medical reasons, a fingerprinting technique joint is indicated. It takes into account the duality tissue prosthetic bearing surfaces.

Fig. 21 - Peak floating anterior maxilla.	Fig. 22 - Anterior view of the primary model. Red: limits the peak floating Black: area boundary to space.

A primary model, from a plaster impression mucostatique, or floating zone disinserted is perfectly defined by the clinician (Fig. 22 and 23). This delineation is performed with the patient so that the identification of this limit in the mouth by palpation is in perfect agreement with that drawn on the model. A discharge area circumscribing the area is then plotted disinserted full of about 1 mm on the fibro-mucous well adherent to the bone (Fig. 22 and 23). The thickness to give the spacing depends on the volume of the peak floating. This corresponds to the thickness of one or more sheets of tin which are cut along the outline drawn.

Fig. 23 - Front view of the primary model. In red: the limits of the peak floating Black: area boundary to space.	Fig. 24 - The tin foil is cut limits the discharge area. PEI partially spaced maxillary (lower surface).

The PEI is then designed to be adjusted in areas where the fibro-mucosa is healthy as he has a discharge area for the mucosal hyperplasia to take place freely at it when the pressure are exercised through the PEI (Fig. 25). The peak floating can be selectively depleted with the use of vents with a suitable functional fingerprinting technology. Some very localized areas of support covered by a thin and fragile mucosa must also sometimes be discharged, for example, a edentulous ridge knife edge, a bony prominence, prominent mylohyoid line, a torus or intermaxillary suture pronounced. In these cases, a simple application of wax with a spatula at these reliefs atypical creates spacing as to not cause a harmful compression in these areas.

Fig. 25 - PEI in mid-sagittal plane spaced
at the hyperplastic tissue and adjusted elsewhere.

PEI totally spaced

It is indicated in clinical situations where specific technologies are fingerprint to consider. The limits are the same as for an PEI adjusted but, unlike the latter, it is made after a calibrated space was interposed between the model and the base plate of the PEI. The latter may or may not stops sinking. In one case excessively resorbed maxilla, palate with a flat, shallow and with a fibro-healthy mucosa and adherent to the bone, an imprint compressive pressure controlled or "bite" of the patient akin to the technique described by FRIPP, can find a major indication [18]. On a model from a footprint mucosta-tion, a plate spacing of 4 mm thickness consisting of two sheets of wax calibrated, is cut slightly beyond the boundaries of PEI (Fig. 26). Resin base plate is then conventionally made and therefore has the distinction of being totally spaced the model (Fig. 27). When setting in the mouth of the PEI, the wax spacer still attached to the underside of the tray (fig. 28).

Fig. 26 - Plate of wax over the entire calibrated the primary model to the bottom of the vestibule.	Fig. 27 - PEI totally spaced, including its edges.	Fig. 28 - Setting the PEI in the mouth, wax spacer up to a compressed fingerprint type FRIPP.

In clinical situations resulting from benign or malignant tumors of the jaws or so in cases of palatal clefts, the bearing surfaces in total the toothless may be tormented and fragile. An PEI totally spaced with stops sinking is built (Fig. 29). The situation of these is carefully determined with respect to areas of strong support in order to achieve at least a triangle of support satisfactory.

Fig. 29 - PEI totally spaced stops sinking with wax to test and adjust the PEI.

conclusion

In this section, we defined the standard criteria to be met by PEI in the majority of clinical cases may be encountered in practice. The development of specific IEP according to specific criteria have also been clarified to reflect the importance of resorption, the condition of the bearing surfaces and the choice of fingerprinting technique. IEPs, built in the laboratory, must then be settled in the mouth to become physiological and thus allow the development of functional impressions in the best conditions.

• < Prev
• Next >