25 – 26 Jan. 2020: Work with articulators and facebow

Course subject: Working with articulators and focebows
Date:25 – 26 January 2020
Course language:Bulgarian
Location:Sofia, Balgarska Legia 2 str.

Two days course intended to dentists and dental technicians who want to expand their knowledge on the work with articulators and facebow and develop more in the functional dentistry and occlusion.

The course will take a place at Coldy Dent Functional Atelier, with lector dr. Manol Ivchev.
Attendees will receive detailed theoretical knowledge and practical experience. After completing the course, the participants will be able to understand the need and function of the articulator and facebow and successfully include it in their practice.

It is well adjudged that the mouth is the best articulator. 
Due to the innumerable procedures carried out to fabricate prosthesis, a mechanical device stimulating the two jaws and the tempro-mandibular joints are needed for ease of work and comfort of the patient.
The articulator is a mechanical device that represents the tempro-mandibular joints and the jaw members to which maxillary and mandibular casts may be attached to simulate some or all the mandibular movements. 

Many devices that are called articulators do not satisfy this definition. Some of these devices make no attempt to represent the tempro-mandibular joints (face bow transfer) or their paths of motion (eccentric registration).
Some instruments allow eccentric motion determined by inadequate registrations (positional registration).  Some other utilize average or equivalent pathways.  Some of them attempt to reproduce the eccentric pathways of the patient from three dimensional registrations and other articulators record even the fourth dimension.

Use of the articulator in the daily dental practice:
To diagnosis the state of occlusion in both the natural and relationship dentions.
To plan dental procedures based on the relationship between opposing and artificial teeth, as evaluation of the possibility of balanced occlusion.
As an aid in the fabrication of dental restorations and lost dental parts. To correct and modify complete restorations.
In the arrangement of artificial teeth for complete dentures, removable partial dentures and waxing in field partial dentures.
To investigate occlusal contractions and mandibular movements.

Border movements:
Mandibular movements at the limits dictated by atomic structures, as viewed in a given plane.
The border movements are significance in discussing articulation because they are limited by ligaments.
The border movements are highly repeatable and useful in setting the various adjustments on the mechanical fossae of an articulator.

Articulators Classification:
Class I: Non Adjustable articulator (Simple hinge/plane-line)
Non-adjustable articulators only open and close in a fixed horizontal axis, they can simulate lateral and protrusive jaw movement.
Various mounting plate attachment options include screws, magnetic, plaster and disposable plastic screws.

Class II: Average value Articulators
Provides an average mandibular excursions. Permits horizontal and vertical notions. It permits opening and closing hinge movements around fixed horizontal axis, protrusive, right and left lateral excursion. Its condylar path is set at a fixed angle of 30 degrees and fixed or adjustable incisal guidance table. It has fixed intercondylar distance.

Class III: Semi-adjustable Articulators
They are designed to be adjusted to simulate the jaw movements of the patient, the condylar paths have a fixed contour which cannot be altered and the distance between the condyles cannot be varied. They have adjustable horizontal condylar guides and accept both centric relation and protrusive maxillomandibular relation records.
There are  two types of semi-adjustable articulators: Non-arcon and Arcon
Difference between the two types.

Advantages and limitations of articulators
– Types of facebows
– Mounting Models in the Articulator
– Mandibular Movements and their impact on the contacting surfaces of the anterior teeth.
– Condylar guidance
– Incisal guidance
– Compensating curve
– Orientation of the occlusal plane
– Functional movements
– Cuspal angle
– Articulators based on geometric theories of mandibular motions.

After finishing the course, the participations will have the following knowledge and competency :
– to understand and work with different articulatots
– to have control over their work;
– to know how to transfer information taken from the patient to the dental technician in the laboratory, 
– to understand well the protocol steps in the functional dentistry


Dr. Manol Ivchev


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