Basic Anatomy of the Edentulous Mouth & Preliminary Impression Procedure and Making the Diagnostic Casts

Define a complete denture

A removable dental prosthesis that replaces the entire dentition and associated structures of maxilla or mandible

Define an immediate denture

Same as complete denture replaces inserted same day and same time as the pday they were extreacted

Define complete overdenture

Leave a few teeth like some canines leave good teeth might be a1st bicuspi dor canine to provide extra support

Define immediate overdenture

Immediate denture + leave some overdenture abutments for support. They don’t help with retention but provide stability and support

Example of removable partial denture (RPD)

Define edentualism

Partial absence or total loss of dentition

Example of edentulous mandible arch

What are some terms you can use for edentualism

Partially or completely edentualous

How many people are edentulous?

36 million

How many people are missing at least one tooth

120 million

What is the total US population that are edentulous

330 million

Who has a higher rate of edentualism

Age >/= 65

Workflow of complete denture

What is the process for getting a complete denture

Examination and proper diagnosis; preliminary impressions using alginate and stock trays

What are stock trays

General trays with perforations especially for edentulous patients

Custom Trays

Final impression

What is a master cast fabrication

On which your denture is actually fabricated

What is a wax rinse

To replace where the future teeth are going to be you have to relate how the mandible relates to the maxilla (bite registration bc we have teeth)

Facebow transfer and mounting

With the help of central relation record

What are the different ways for denture processing?

Investing, boil-out, packing and curing

What do you do after a denture delivery?

Occlusal adjustment

Follow-up visits

Name all the osseous landmarks of the maxilla

1. Mental Foramen

2. Residual Alveolar Ridge

3. Maxillary Tuberosity

4. Hamular Notch

5. Incisive Foramen

6. Malar/zygomatic Process

7. Ramus (coronoid process and condyle)

8. Cuspid eminence

What is the hamular notch?

Notch or space between hamular process and maxillary tuberosity

What is the hamular process

Tip of the internal pterygoid plate of the sphenoid bone

Name all the osseous landmarks of the mandible

1. Residual Alveolar Ridge

2. External Oblique Ridge

3. Mental Foramen

4. Mylohyoid ridge (lingual aspect)

5. Genial Tubercles (lingual anterior)

State the patterns of resportion

• Mandible resorbs 4x faster than upper

• Mandibular ridge becomes larger and maxillary ridge becomes smaller over time

• Great variation in resorption from patient to patient

Name the muscles involved with maxillary and mandibular dentures

1. Temporalis

2. Masseter

3. Medial Pterygoid

4. Pterygomandibular raphe

5. Palatoglossus

6. Buccinator

7. Muscles of facial expression

8. Mylohyoid

9. Genioglossus and geniohyoid

10. Muscles of soft palate

    1. Tensor veli palatini

    2. Levator veli palatini

Which muscle of mastication has no direct effect on maxillary and mandibular dentures?

Lateral pterygoid

Name the overlying soft tissues in the maxilla

1. Hamular notch

2. Incisive papilla

3. Rugae

4. Frenae

5. Muscle attachments around the border

Soft tissue landmarks

Palatal Torus

Name the overlying soft tissues in the mandible

1. Retromolar pad

2. External oblique ridge

3. Border tissues

4. Mental foramen area

5. Pterygomandibular raphe frena

6. Mylohyoid ridge

7. Sublingual gland area

What is a vibrating line?

An imaginary line across the posterior part of the palate marking the division between the movable and immovable tissues of the soft palate

When can the vibrating line be identified?

When the movable tissues are functioning

What is the significance of the vibrating line?

It indicates the most posterior extent of maxillary denture

How do you find the vibrating line?

Locate the hamular notch

What can you use to minimize gagging?

Topical anesthetic spray

Components of an ideal impression

Smooth rounded borders with no major voids

What serves as a good reference for the fabrication of new dentures?

Making an alginate impression and then a stone cast of the existing denture

What c an you use to block the tongue space after taking the impression?

Play-Doh

What is the working time for mounting plaster

60-90 sec

What is the setting time for mounting plaster

3 min

What is the working time for alginate

45 sec

What is the setting time for alginate

1-2 min