Jaw relations: Vertical and Horizontal components Flashcards
occlusal
registration stage:
Creating and outlining the form of the upper denture
Recording of intermaxillary relations
(Vertical relations, Horizontal relations)
Selection of teeth.
Orientation relations
upper rim is produced with
Alma Gauge
Incisive papillae
Biometric guide
Its 1 cm away from the centrals
canines are perpendicular to incisive paillae in the sagittal plane
Alma Gauge
Produces an upper rim (ACB) with
equivalent dimensions, labially, to previous or current dentures
that are considered adequate
Components:
Graduated table
Graduated spring-loaded pointer
The denture being ‘templated’ is placed on the graduated table and the pointer placed in the impression surface of the denture in the middle of the area occupied by the incisive papilla.
The vertical distance from the pointer tip to the incisal tips is then
read off the graduated scale,
Occlusion rims
Width of occlusal rim: anteriorly 5mm, premolar area 8mm, molar area 10mm
Labially upper rim should be 8mm anterior to the centre of the incisive papilla
Height of upper occlusal rim: 8mm from the crest of the alveolar ridge anteriorly, less posteriorly
Height of lower occlusal rim: level with base of retromolar pad, slightly higher anteriorly, parallel to the ridge,
Length of occlusal rims: to the distal of the first molars only.
Materials used for bases
TABLV
Thermoplastic resin
Auto-polymerised PMMA
Light cured PMMA
Vacuum formed PVA
Base-plate wax
Wax base:
Good tissue detail present on the fitting surface of the wax
Wire strengtheners in the palate and lingual flange
Accurate reproduction of the sulcus depth and width in wax, with adequate
relief for the frena
No blackened, pitted areas or presence of fingerprints indicating a thin or
stretched area due to overheating
No instability, that is rocking or movement on the cast
No areas of excess material beyond the land of the model
No air bubbles trapped in wax
No wax residues on fitting area
