What is posterior palatal seal area?
The posterior palatal seal area is defined as the soft tissue area at or beyond the junction of the hard and soft palates on which pressure within physiologic limits can be applied by a removable complete denture to aid in its retention.
Where is the AH line?
The vibrating line is an imaginary line that is drawn across the palate and marks the beginning of the movement in the soft palate when the individual say “ah”2. Extending from one hamular notch to the other, the line usually passes about 2 mm in front of the fovea palatini2.
What is PPS in prosthodontics?
• Posterior palatal seal (PPS) is defined as the. seal area at the posterior border of a maxillary removable dental prosthesis.
Why is a post Dam important?
A post dam is commonly created on the cast after the completion of indexing or investment procedure required for relining/rebasing the denture. This method is convenient and avoids the inconvenience related to the turnaround of an indexed or invested cast between the practitioner and the dental technician.
What is fovea palatini?
two small depressions in the posterior aspect of the palate, one on each side of the midline, at or near the attachment of the soft palate to the hard palate.
What is the infratemporal fossa?
The infratemporal fossa is a complex area located at the base of the skull, deep to the masseter muscle. It is closely associated with both the temporal and pterygopalatine fossae and acts as a conduit for neurovascular structures entering and leaving the cranial cavity.
What is Retromylohyoid space?
retro-, mylohyoid muscle. Definition. The space behind and below the mylohyoid ridge. Specifically, the part of the alveolingual sulcus distal to the lingual tuberosity (the distal end of the mylohyoid ridge).
What is a posterior palatal seal?
The posterior palatal seal is defined as, “the soft tissues along the junction of the hard and soft palates on which pressure within thephysiological limits of the tissues can be applied by a denture to aid in the retention of the denture”. 4.
How far does the post palatal seal extend?
The post palatal seal extends medially from one tuberosity to the other. Laterally, the pterygomaxillary seal extends through the ptrygomaxillary notch (hamular notch),continuing for 3 to 4 mm anterolaterally approximating the mucogingival junction.
How do you seal a denture in the posterior region?
26. • In the posterior region sealing is done by developing a posterior palatal seal. • Such a seal will create a partial vacuum that will not operate continuously, but one that will come into play only when horizontal or tipping thrusts tend to dislodge the denture and then only long enough to overcome the emergency.
How does saliva affect the posterior palatal seal?
Physiologic consideration Saliva Presence of thick ropy saliva can create hydrostatic pressure in the area anterior to the posterior palatal seal , resulting in a downward dislodging forces 15. Anterior vibrating line 16. Posterior vibrating lines