7.1 Complete Denture

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JAW RELATIONS (JRS)

MAXILLO-MANDIBULAR RELATIONS (MMRs)

MOUNTING RECORDS

FACE-BOWS & TRANSFER RECORDS & ATICULATORS

FAZAL GHANI

KHYBER COLLEGE OF DENTISTRY PESHAWAR


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Face-bow (fsbo):A device used in dentistry to record the positional

relations of the maxillary arch to the temporo-mandibular joints

A caliperlike device used in dentistry to record therelationship of the jaws to the temporomandibular

joints.

And to orient dental casts in this same relationship to

the opening axis of the articulator.


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Articulator:

A "dental machine" that works as close as practical to the way the

mouth works.Dental stone casts / Record bases are placed on the machine for:

- examination, diagnosis & monitoring of occlusal relations.

- constructing occlusion of dental appliances.

Special records are taken to accurately position the dental models onthe articulator.

A mechanical device used in dentistry to which casts of the maxillary

(upper) and mandibular (lower) teeth are fixed, reproducing recorded

positions of the mandible in relation to the maxilla.

An articulator assists in the fabrication of removable prosthodontic

appliances (dentures), fixed prosthodontic restorations (crowns,

bridges, inlays and onlays) and orthodontic appliances.


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Types of Articulators:Non-Adjustable: Simple hinge / PLAs & FPAs / AVAs.

PLAS: - Not true articulators (Occludators / Cast relators.

- Teeth set in one occlusal position (ICP) (not allowing Eccentricmovements).

- Changes in OVD introduce errors in CRP.

- Used for making inlays / onlays.

- not for doing occlusal analyses & diagnosis.

FPAs / AVAs:- employs average values for Condylar / incisal angles.

- can establish average tooth-condyle relations.

- do not allow adjustments (use fixed / average values).

- fixed values used for compensating curves.- Need for Intra-oral adjustment id individual values differs.

- not suitable for final correction / refinement of occlusion.

Adjustable: SAA (Arcon / non-Arcon) & FAA (Arcon).


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SAAs:Adjustable in 2-dimensions.

Adjustable condylar / incisal / Bennett Angles.

Adjustable to relate ridges and teeth to the above angles.

Types: Dentatus / Hanau / Whipmix.

Arcon: Condylar fossae on upper member.

Non-Arcon: Condylar fossae on Lower member.

FAAs:

Adjustable in 3-dimensions.

Changes in OVD compatible with retruded arc of closure.

Records returned to ICP if mounted in ICP

Used for diagnosis, analyses, prognosis / adjustments in

occlusion of complex nature (full-mouth-rehab cases).

Limited use in CD work / GD practice.

Examples: Denar, Stuart, TMJ Verticulator).


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Record PLA FPA /

AVA

SAA FAA

1. Accepts CR Record.

2. Changes in OVD Acceptable.

3. Accepts Average / Hinge Face-bow

Transfer Record.

4. Allows adjustments in lateral /

Bennett movements.

5. Accepts Protrusive Record.

6. Arcon Type.

7. Adjustable Inter-Condylar Width.

8. Accepts Pantographic Tracing

Records.

Y

N

N

N

N

N

N

N

Y

N

N

N

N

N

N

N

Y

Y

Y

Y

Y

NY

N

N

Y

Y

Y

Y

Y

Y

Y

Y


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Factors of Articulator Selection:Nature of Prosthetic / Restorative work:

PLA: - for CDs, inlays, single crowns & bridges up-to 3-units.

SAA: - for most restorative work.FAA: - for complex cases.

- Restorations depending on complete control of

occlusion.

- detailed analyses of occlusion & Full-mouth-rehab.Experience of Dentist & Technician:

- familiar with the type, design, mounting & adjustment

procedures of the articulator.

Using a complex articulator is of no value if:- the benefits it offer cannot be obtained from it.

Does not pay to complicate an articulator beyond certain level:

as this makes it impracticable / difficult to handle with no

corresponding advantage.


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Whipmix Articulator


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Whipmix Articulator Model 855


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Wide View Articulator


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Plaster-less Articulator


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Quick Mount Articulator


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7.1 Complete Denture