p.1
Stability in Complete Dentures
What influences the stability of complete dentures?
Forces acting on polished and occlusal surfaces and the form of the supporting tissues.
p.1
Stability in Complete Dentures
How does neuromuscular control affect complete dentures?
It affects stability more than retention.
p.1
Retention in Complete Dentures
What is retention in complete dentures?
The resistance of a denture to displacement.
p.3
Anatomical Landmarks of Edentulous Jaws
What role does the alveolar ridge play in denture construction?
It serves as a support structure for the denture base.
p.3
Anatomical Landmarks of Edentulous Jaws
Why are anatomical landmarks important in prosthetics?
They help ensure proper fit and function of dentures.
p.11
Bite Registration in Complete Dentures
How is the Overall Vertical Dimension (OVD) recorded using the Willis Gauge?
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.
p.11
Bite Registration in Complete Dentures
What does RVD stand for in denture construction?
Resting Vertical Dimension.
p.1
Stability in Complete Dentures
What is stability in complete dentures?
The denture's ability to resist displacing forces during function.
p.3
Anatomical Landmarks of Edentulous Jaws
What are anatomical landmarks of edentulous jaws?
Key reference points used in prosthetic dentistry to aid in the construction of dentures.
p.3
Anatomical Landmarks of Edentulous Jaws
How do anatomical landmarks assist in jaw registration?
They provide reference points for accurate measurements.
p.9
Bite Registration in Complete Dentures
How is the rim adjusted after being placed in the mouth?
It is removed, placed back onto the working cast, and trimmed on the labial aspect using a wax knife.
p.1
Neutral Zone in Complete Dentures
What is the neutral zone in complete dentures?
The area where muscular displacing forces are in balance.
p.2
Retention in Complete Dentures
How can the denture base be adapted to enhance retention?
By adapting it closely to the mucosa and utilizing the surface tension effects of saliva.
p.12
Bite Registration in Complete Dentures
How can rolling the tongue backwards assist in jaw registration?
It can help create a reproducible jaw relationship, especially if the patient has abnormal bite patterns.
p.1
Retention in Complete Dentures
What factors influence the retention of complete dentures?
Peripheral seal, contact area between denture and tissues, close fit of the denture, and viscosity/volume of saliva.
p.13
Bite Registration in Complete Dentures
What does the bite registration process transfer?
The patient's jaw relationship into the bite rims.
p.6
Post Dam in Complete Dentures
Where are the compressible areas located in relation to the post dam?
Where the greater and lesser palatine neurovascular bundles are found.
p.4
Stages in Complete Denture Construction
What is required for definitive impressions?
Accurate impressions with accurate border moulding.
p.13
Bite Registration in Complete Dentures
What is the purpose of cutting location grooves into the bite rims?
To allow space for the bite registration material (Futar-D) to flow and lock the upper and lower bite rims together.
p.7
Post Dam in Complete Dentures
What is the first step in cutting a post dam onto the definitive maxillary cast?
Soak the working cast in water for 5 minutes to soften it.
p.2
Denture Base Adaptation
How should the lower denture base be extended?
Full depth and width of the lingual pouch and halfway across the retromolar pad.
p.6
Post Dam in Complete Dentures
What is the purpose of the post dam in a maxillary acrylic denture?
To enhance retention and maintain the posterior peripheral seal of the denture base.
p.6
Post Dam in Complete Dentures
What factors influence the depth of the post dam?
The compressibility of tissues.
p.13
Bite Registration in Complete Dentures
What warning should be given to the patient regarding the bite rims?
When they open, the bite rims will be joined together.
p.8
Bite Registration in Complete Dentures
How can old dentate pictures help in bite registration?
They aid in tooth positioning, carving of rims, and determining the position of the smile line and aesthetics.
p.8
Bite Registration in Complete Dentures
What should be assessed before continuing with the bite registration?
Retention, extension, stability, and support of each base plate individually.
p.7
Post Dam in Complete Dentures
What should be done in cases with a midline fissure?
Score out the fissure to ensure a posterior palatal seal.
p.8
Bite Registration in Complete Dentures
How should the upper wax rim be adjusted for the patient?
It should be carved to resemble the lip support of when they were dentate.
p.5
Denture Base Adaptation
What is the purpose of the thin flange under the nose in dentures?
Lip support is gained lower down the flange and from the teeth.
p.2
Denture Base Adaptation
What is the maximum extension method for the upper denture base?
Extend base to cover distally the tuberosities and palate, onto compressible tissue just before the vibrating line.
p.13
Bite Registration in Complete Dentures
What should the patient do after placing Futar-D in the grooves?
Close their mouth and wait for it to set.
p.10
Bite Registration in Complete Dentures
How is the centre line determined if no photographs are available?
It is dictated via the philtrum, not the nose.
p.4
Stages in Complete Denture Construction
What type of tray is used for preliminary impressions?
Edentulous stock tray using Impression Compound.
p.4
Stages in Complete Denture Construction
What material is used for upper definitive impressions?
Alginate with a 3mm spaced upper special tray.
p.9
Bite Registration in Complete Dentures
What is the first step in carving the rim for lip support?
Place the upper rim in the mouth.
p.7
Post Dam in Complete Dentures
How are the positions of the fovea palatini transferred to the working cast?
By identifying them in the mouth and marking their positions with a pencil.
p.2
Denture Base Adaptation
What is the consequence of over-extension in dentures?
It results in a denture that is easily displaced in function.
p.8
Bite Registration in Complete Dentures
What tools are used in bite registration?
Fox’s bite plane, Wax paddle, Willis gauge, Wax knife, Bunsen burner, PVS dispensing gun.
p.2
Retention in Complete Dentures
Why is the neutral zone important in complete dentures?
It is more critical for the retention of the lower complete denture.
p.10
Jaw Registration Guide
What is OVD and why is it important?
OVD (Occlusal Vertical Dimension) indicates the measurement between the maxilla and mandible and is crucial for aesthetics and function.
p.12
Bite Registration in Complete Dentures
Why is it important to avoid using the headrest when assessing the rest position?
The headrest can alter the rest position, affecting the true postural position of the mandible.
p.14
Try-in Process for Complete Dentures
What should be inspected on the articulated wax-tooth dentures during the try-in process?
Adaption, flange extensions, denture bearing areas, and presence of balanced articulation.
p.6
Post Dam in Complete Dentures
What problems may occur if the post dam is carved too deep?
Pain and discomfort for the patient.
p.7
Post Dam in Complete Dentures
Why is it important to ensure the upper rim has good retention?
To accurately assess aesthetics of lip support, incisal plane, occlusal plane, center line, and buccal corridors.
p.12
Bite Registration in Complete Dentures
How can facial muscles help in determining the correct OVD?
Facial muscles will indicate incorrect OVD by showing facial tension if it is increased or reduced beyond physical dimensions.
p.12
Bite Registration in Complete Dentures
What should be done after establishing the OVD?
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.
p.7
Post Dam in Complete Dentures
What design is drawn on the palatal midline of the working cast?
A 'cupids' bow design extending 1 cm onto the soft area of the palate.
p.10
Retention in Complete Dentures
How is the smile line determined?
From the bottom of the upper lip at the highest point.
p.6
Post Dam in Complete Dentures
What is the non-compressible area in the context of the post dam?
The midline of the palate due to the nasal spine.
p.2
Retention in Complete Dentures
What is necessary for a good border seal in dentures?
Ensuring flanges fill the entire sulcus width and placing a post-dam on compressible tissue.
p.2
Stability in Complete Dentures
What is balanced occlusion in the context of complete dentures?
It ensures balanced occlusion free from interfering contacts.
p.11
Bite Registration in Complete Dentures
How is RVD obtained?
By removing the lower denture and asking the patient to close their lips without occluding, then checking the number on the Willis gauge.
p.9
Bite Registration in Complete Dentures
How should the incisal plane be aligned?
It should be parallel with the interpupillary line.
p.9
Bite Registration in Complete Dentures
What is the significance of the occlusal plane in denture construction?
It is carved parallel with the alar-tragus line, which is key to good aesthetics.
p.6
Post Dam in Complete Dentures
What anatomical landmark is the post dam located on?
The junction of the hard and soft palate, on the vibrating line.
p.8
Bite Registration in Complete Dentures
What are the three steps of bite registration?
1. Orientation 2. Facial and smile features 3. Register the bite.
p.8
Bite Registration in Complete Dentures
What materials are used for bite registration?
Wax and bite registration paste.
p.12
Bite Registration in Complete Dentures
What position should the patient be in when assessing the rest position?
The patient should be sitting upright without contacting the headrest of the dental chair.
p.11
Bite Registration in Complete Dentures
What factors can influence the adjustment of vertical dimensions?
The condition of old dentures or what looks natural.
p.8
Bite Registration in Complete Dentures
What should be done if retention, extension, stability, or support is not correct?
Perform an impression wash inside the base plate and have a new model made.
p.2
Retention in Complete Dentures
What role do correctly shaped polished surfaces play in denture retention?
They allow muscle action to re-seat the denture.
p.10
Jaw Registration Guide
How is RVD obtained?
By removing the lower denture and asking the patient to close their lips together without occluding.
p.10
Jaw Registration Guide
What is Freeway Space?
The space between maxillary and mandibular occlusal surfaces when the mandible is in its physiologic rest position, usually 2-4 mm.
p.4
Stages in Complete Denture Construction
What is the purpose of adding greenstick during upper impressions?
To restore 3mm spacing for alginate flow.
p.14
Try-in Process for Complete Dentures
What indicates a problem with stability and retention during the try-in?
Rocking of the dentures, which may occur due to overextended flanges or inaccurate impressions.
p.14
Try-in Process for Complete Dentures
What should be checked in the post dam region during the try-in?
Remark the post dam if it is incorrectly placed.
p.4
Stages in Complete Denture Construction
What occurs during the try-in stage?
Final trial of all teeth on temporary bases with modifications if necessary.
p.14
Try-in Process for Complete Dentures
What should be confirmed with the patient after showing them the dentures?
That they are happy with the feel, function, and aesthetics.
p.6
Post Dam in Complete Dentures
How can the vibrating line be identified?
By having the patient say 'Ahh' to observe movement in the soft palate.
p.8
Bite Registration in Complete Dentures
What position should the patient be in during the adjustment of the upper wax rim?
Upright and in their everyday 'social' position.
p.6
Post Dam in Complete Dentures
What issue arises if the post dam is carved too posterior?
Poor patient tolerance, which may trigger the gag reflex.
p.4
Stages in Complete Denture Construction
What materials are used for upper and lower baseplates?
Upper - thermoplastic base; Lower - wax with wire strengthener or light cured acrylic.
p.5
Denture Base Adaptation
Where does the denture terminate lingually?
At the insertion of the mylohyoid muscle, with 2-3 mm overextension in the retromylohyoid area.
p.7
Post Dam in Complete Dentures
How is the posterior palatal seal produced on the wax rim?
By warming the posterior palatal wax and reseating it on the definitive working cast.
p.6
Post Dam in Complete Dentures
What happens if the post dam is carved too anterior?
Lack of posterior seal, leading to reduced retention.
p.4
Stages in Complete Denture Construction
What materials can be used for lower impressions?
Zinc Oxide Eugenol or Silicone.
p.5
Stability in Complete Dentures
What effect does the coronoid process have on dentures during jaw movement?
It often flattens the dentures when the patient moves the lower jaw from right to left.
p.14
Try-in Process for Complete Dentures
How can speech be assessed during the try-in?
Using a phonetics test to determine the position of upper central incisors.
p.14
Try-in Process for Complete Dentures
What should you check for when inserting each denture individually?
Ensure they seat fully without using excessive force and check for areas of blanching.
p.4
Stages in Complete Denture Construction
What is the spacing for lower definitive impressions?
0.5mm space with a close-fitting lower tray.
p.5
Retention in Complete Dentures
Why is the denture flange wider from the 4's backwards?
To increase suction by pressing on the cheeks.
p.14
Try-in Process for Complete Dentures
How should the occlusal planes be aligned?
Incisal plane parallel to the inter-pupillary line and posterior occlusal planes parallel to the alar-tragal line.
p.7
Post Dam in Complete Dentures
What is the aim for the complete dentures in relation to the vibrating line?
To extend just in front of the vibrating line, generally within 1 mm of the fovea palatini.
p.8
Bite Registration in Complete Dentures
How should adjustments to the upper rim be made?
Step by step, always adjusting rims on the cast.
p.5
Post Dam in Complete Dentures
Where should the post dam border be located in relation to the fovea palatini?
Just in front of the fovea palatini.
p.14
Try-in Process for Complete Dentures
What aspects of aesthetics should be checked during the try-in?
Incisal show, tooth position, shade, and smile line.
p.14
Try-in Process for Complete Dentures
What should be assessed to ensure comfort during the try-in?
Support, ensuring there are no pressure points.
p.4
Stages in Complete Denture Construction
What should be done during the delivery stage of dentures?
Deliver dentures with minor adjustments and schedule a review within 2 weeks.
p.14
Try-in Process for Complete Dentures
What should be done if there are flange over or underextensions?
Assess and correct any flange over or underextensions.
p.4
Stages in Complete Denture Construction
What is the purpose of jaw registration?
To prescribe the shape and form of the dentures and the position of teeth.
p.5
Retention in Complete Dentures
Why is it important for the denture to extend completely over the retromolar pad?
To achieve stability and potential suction from the lower denture.
p.4
Stages in Complete Denture Construction
What is the purpose of the lab stage in denture construction?
To cast definitive impressions and make occlusal rims.
p.5
Retention in Complete Dentures
What is the primary support for complete dentures?
Gained from the buccal shelves and retromolar pads.
p.5
Denture Base Adaptation
What is the general shape of complete dentures?
Thin anteriorly and widening out posteriorly.
p.14
Try-in Process for Complete Dentures
What should be done to check occlusion during the try-in?
Use articulating paper for minor adjustments; larger adjustments may require resetting teeth.
