PDF Pros - DSB pages 56-69

Willis Gauge.

Forces acting on polished and occlusal surfaces and the form of the supporting tissues.

It affects stability more than retention.

The resistance of a denture to displacement.

It serves as a support structure for the denture base.

They help ensure proper fit and function of dentures.

Place both upper and lower rims in the mouth, position the solid arm on the base of the patient's nose and the sliding arm towards the chin, then lock it into position.

Resting Vertical Dimension.

The denture's ability to resist displacing forces during function.

Key reference points used in prosthetic dentistry to aid in the construction of dentures.

90 degrees.

They provide reference points for accurate measurements.

It is removed, placed back onto the working cast, and trimmed on the labial aspect using a wax knife.

The area where muscular displacing forces are in balance.

By adapting it closely to the mucosa and utilizing the surface tension effects of saliva.

It can help create a reproducible jaw relationship, especially if the patient has abnormal bite patterns.

Peripheral seal, contact area between denture and tissues, close fit of the denture, and viscosity/volume of saliva.

Futar-D.

A wax knife.

The patient's jaw relationship into the bite rims.

Take a shade.

Where the greater and lesser palatine neurovascular bundles are found.

Even bilateral contact.

Approximately 1 mm deep.

Accurate impressions with accurate border moulding.

To allow space for the bite registration material (Futar-D) to flow and lock the upper and lower bite rims together.

Soak the working cast in water for 5 minutes to soften it.

Full depth and width of the lingual pouch and halfway across the retromolar pad.

To enhance retention and maintain the posterior peripheral seal of the denture base.

The compressibility of tissues.

When they open, the bite rims will be joined together.

They aid in tooth positioning, carving of rims, and determining the position of the smile line and aesthetics.

Retention, extension, stability, and support of each base plate individually.

Score out the fissure to ensure a posterior palatal seal.

It should be carved to resemble the lip support of when they were dentate.

Lip support is gained lower down the flange and from the teeth.

The residual ridge.

Extend base to cover distally the tuberosities and palate, onto compressible tissue just before the vibrating line.

Close their mouth and wait for it to set.

It is dictated via the philtrum, not the nose.

FWS = OVD - RVD.

FWS = 47mm - 45mm = 2mm.

Preliminary impressions.

Edentulous stock tray using Impression Compound.

Heated Wax Paddle.

Alginate with a 3mm spaced upper special tray.

Place the upper rim in the mouth.

By identifying them in the mouth and marking their positions with a pencil.

It results in a denture that is easily displaced in function.

Fox’s bite plane, Wax paddle, Willis gauge, Wax knife, Bunsen burner, PVS dispensing gun.

It is more critical for the retention of the lower complete denture.

OVD (Occlusal Vertical Dimension) indicates the measurement between the maxilla and mandible and is crucial for aesthetics and function.

The headrest can alter the rest position, affecting the true postural position of the mandible.

Adaption, flange extensions, denture bearing areas, and presence of balanced articulation.

Pain and discomfort for the patient.

To accurately assess aesthetics of lip support, incisal plane, occlusal plane, center line, and buccal corridors.

Facial muscles will indicate incorrect OVD by showing facial tension if it is increased or reduced beyond physical dimensions.

Ask the patient to bite together several times and scribe a location mark between the posterior regions of the upper bite rim and lower posterior part in a closed position.

A 'cupids' bow design extending 1 cm onto the soft area of the palate.

A Lecron carver.

From the bottom of the upper lip at the highest point.

The midline of the palate due to the nasal spine.

Ensuring flanges fill the entire sulcus width and placing a post-dam on compressible tissue.

It ensures balanced occlusion free from interfering contacts.

By removing the lower denture and asking the patient to close their lips without occluding, then checking the number on the Willis gauge.

Fox’s Bite Plane.

It should be parallel with the interpupillary line.

It is carved parallel with the alar-tragus line, which is key to good aesthetics.

Fox's Bite Plane.

The junction of the hard and soft palate, on the vibrating line.

1. Orientation 2. Facial and smile features 3. Register the bite.

The width of the nose.

Wax and bite registration paste.

The patient should be sitting upright without contacting the headrest of the dental chair.

The condition of old dentures or what looks natural.

Perform an impression wash inside the base plate and have a new model made.

They allow muscle action to re-seat the denture.

By removing the lower denture and asking the patient to close their lips together without occluding.

The space between maxillary and mandibular occlusal surfaces when the mandible is in its physiologic rest position, usually 2-4 mm.

To restore 3mm spacing for alginate flow.

Rocking of the dentures, which may occur due to overextended flanges or inaccurate impressions.

Remark the post dam if it is incorrectly placed.

Final trial of all teeth on temporary bases with modifications if necessary.

That they are happy with the feel, function, and aesthetics.

By having the patient say 'Ahh' to observe movement in the soft palate.

Upright and in their everyday 'social' position.

Poor patient tolerance, which may trigger the gag reflex.

Upper - thermoplastic base; Lower - wax with wire strengthener or light cured acrylic.

At the insertion of the mylohyoid muscle, with 2-3 mm overextension in the retromylohyoid area.

By warming the posterior palatal wax and reseating it on the definitive working cast.

Lack of posterior seal, leading to reduced retention.

Zinc Oxide Eugenol or Silicone.

It often flattens the dentures when the patient moves the lower jaw from right to left.

Using a phonetics test to determine the position of upper central incisors.

Ensure they seat fully without using excessive force and check for areas of blanching.

0.5mm space with a close-fitting lower tray.

To increase suction by pressing on the cheeks.

Incisal plane parallel to the inter-pupillary line and posterior occlusal planes parallel to the alar-tragal line.

To extend just in front of the vibrating line, generally within 1 mm of the fovea palatini.

Step by step, always adjusting rims on the cast.

Just in front of the fovea palatini.

Incisal show, tooth position, shade, and smile line.

Support, ensuring there are no pressure points.

Between 5.5 - 12 mm.

2-4 mm.

Deliver dentures with minor adjustments and schedule a review within 2 weeks.

Assess and correct any flange over or underextensions.

To prescribe the shape and form of the dentures and the position of teeth.

To achieve stability and potential suction from the lower denture.

To cast definitive impressions and make occlusal rims.

Gained from the buccal shelves and retromolar pads.

Thin anteriorly and widening out posteriorly.

Use articulating paper for minor adjustments; larger adjustments may require resetting teeth.