imanirose13 Denture Impression and Treatment Sequence

First Visit

Preliminary impressions

Second Visit

Border molding and final impressions

Third Visit

Maxillo-mandibular relationships

Fourth Visit

Denture try-in

Fifth Visit

Insertion

Laboratory Procedures Between Visits

Pour/trim preliminary casts, fabricate custom trays between 1st-2nd visits; pour/trim final casts, fabricate record bases and wax rims between 2nd-3rd visits; articulation of casts, tooth set-up between 3rd-4th visits; processing between 4th-5th visits.

Final Impressions

Key components include intra-oral adjustment of custom tray, border molding, and final impression.

Objectives of Impression

Support: Resistance to vertical forces; Retention: Resistance to removal; Stability: Resistance to horizontal forces; Esthetics for lips; Maintenance of oral tissue health.

Maxillary Border Molding

Includes labial vestibule, buccal vestibule, and posterior palatal seal.

Labial Vestibule (Maxillary)

Structures: Labial frenum, orbicularis oris; Movements: Lip elevation, extension outward/downward/inward; Patient instructions: Say Ouh!, Ah!, E!

Buccal Vestibule (Maxillary)

Structures: Buccinator muscle, coronoid process; Movements: Cheek manipulation (elevation, pulling in various directions); Patient instructions: Fish face, side-to-side jaw movement.

Posterior Palatal Seal

Location: Junction of hard and soft palate; Movements: Wide opening, saying ah, Valsalva maneuver; Purpose: Compensate for acrylic shrinkage, prevent food trapping.

Mandibular Border Molding

Includes labial vestibule, buccal vestibule, and alveololingual sulcus.

Labial Vestibule (Mandibular)

Similar movements to maxillary border molding; Additional consideration for mentalis muscle.

Buccal Vestibule (Mandibular)

Structures: Buccinator, masseter; Special attention to buccal shelf area; Masseteric notch formation during closure.

Alveololingual Sulcus

Sublingual crescent area, mylohyoid area, retromylohyoid area; Movements: Tongue protrusion, touching palate, side-to-side movements.

Final Impression Technique

Materials: Vinylpolysiloxanes or Polyether; Steps: Apply adhesive to tray, load impression material, place in mouth, perform border molding movements, allow setting, remove and evaluate.

Clinical Tips

Ensure proper tray extensions, verify peripheral seal, check for bubbles and voids, trim excess material with #15 Bard Parker blade, store impressions in sealed bag with water until next session.