Manuals_files/CD Manual 12.pdf - Removable Prosthodontics

Border Molding - 21
Mandible
Border molding in the mandible is generally more challenging due to the changing
position of the floor of the mouth - the position of the lingual periphery can differ
greatly between positions at rest and activity
Posterior buccal areas:
1. Pull the cheek upward while holding tray in place. Have patient suck their cheeks
inward while holding tray in place.
2. The retromolar pad should be covered (at least partially) to provide a seal and
comfort.
3. Border molding should not normally extend beyond the external oblique ridge.
Palpate the cheek at the angle of the mandible to feel for a smooth transition between
the mandible and the border molding. Palpation of a prominent ledge of compound
indicates overextension of the compound lateral to the retromolar pads and posterior
ridge
4. The distal buccal extension of denture often needs to converge medially to allow
movement of the masseter muscle. This portion can be molded by having the patient
try to close with some pressure against your support of the mandibular tray. This
activates the masseter, which will displace the compound on the distobuccal area of
the flange, if the tray itself is not over extended.
5. The labial frenum is narrow and distinct; the buccal frena are broad and “V-shaped”.
To mold the labial frenum, pull the lip straight up, but not in as exaggerated manner
as is used for the maxilla.
Posterior lingual areas
1. Have the patient touch their tongue to the corners of the mouth, to the palate and
stick their tongue out of their mouth
2. An “S” shaped lingual flange commonly results in the posterior lingual area
3. Compound should extend into the retromylohyoid space. The distolingual border
can present a squarish rolled border, extending straight down from the retromolar
pads, or it may curve anteriorly to varying degrees, depending on the lateral throat
form. The distolingual border almost never angles posteriorly from the retromolar
pads.