DentistryOnline courseGnathology
Rebuild a stable occlusion with the OCTA concept — reference plane, VDO, curves of Spee and Wilson, and splint therapy for TMD
Professor Jean-Daniel Orthlieb, who created the OCTA method, teaches Occlusal Architecture to Secure Orthodontic or Prosthodontic Treatments (OCTA Concept and splint therapy) in 22 lessons lasting just over 12 hours. He takes you through eight criteria for reconstructing an occlusion, from choosing a horizontal reference and therapeutic jaw position to setting incisor inclination and occlusal curves, then turns to diagnosing joint and muscle disorders and managing them with exercises and splints.
- 22lessons
- 12 h 13 minof video
- 25Q&A questions answered
What you’ll be able to do
- Establish a horizontal reference plane with a facebow or its alternatives
- Record centric relation with hard wax and verify it with the split-cast technique
- Select a therapeutic position and vertical dimension before a full reconstruction
- Reproduce the curves of Spee and Wilson on the articulator using flags and templates
- Classify articular and muscular TMD and choose between conservative and invasive care
- Decide when an occlusal splint is indicated and follow a stepwise protocol
Inside the course
Vocabulary and stability
Orthlieb begins by clearing up conflicting definitions, then analyses what keeps an occlusion stable: first molar support, shortened arches, transverse contacts, the risk of joint compression and a four-point minimum for stabilisation.
Eight criteria for reconstruction
The core of the course builds the OCTA sequence step by step: reference plane, reference and therapeutic positions, VDO, lower and upper incisor position, occlusal plane and Spee curve, incisal guidance, and cusp height with the Wilson curve. The tangent law links incisor inclination to the geometry of the arch.
TMD without the myths
Five lessons cover diagnostic criteria, psychosocial factors, disc displacement with and without reduction, MRI and condylography, emergencies, and when changing the occlusion of a TMD patient is actually justified.
Two recorded Q&A sessions
Around two hours of questions from clinicians cover Gelb splints, check bites, disc dislocation during orthodontics, Botox, electromyography and asymmetric condylar guidance.
Built for
- Prosthodontists planning full-mouth workA defined order of decisions for vertical dimension, guidance and occlusal curves.
- OrthodontistsOcclusal goals and TMD screening that protect the finished result.
- Dental technicians and gnathologistsArticulator transfer methods and a French school view of occlusion.
Curriculum
The concept and definitions in occlusion (20 min) 9 topics
- Occlusion: difficulties and contradictions
- OCTA: 8 criteria of occlusal reconstruction
- The concept of «zerocclusion»: risks
- Functions and dysfunctions of occlusion
- Errors and confusion in definitions concerning occlusion issues
- Elements of occlusion analysis:
- Static relation
- Spatial situation
- Kinetic relation
Classification of occlusive functions and dysfunctions. Stability (32 min) 13 topics
- Occlusion stability:
- ICP
- Vertical and horizontal
- Proximal contacts
- The role of the first molars in the stability of occlusion
- Reduced and short dental arch: differences and functionality
- Transverse stability: classification
- Unstable inter-tubercular contacts: over-occlusion
- Risks of TMJ compression
- Loss of lateral occlusal support and loss of vertical dimension of occlusion
- Vertical incisor dysocclusion
- Clinical methods for assessing the stability of occlusion
- Minimum stabilization: 4 key points
The centric relation (23 min) 7 topics
- Discussion around understanding the centric relation
- Determination of the starting position: 4 key factors
- Anatomical aspects of the TMJ and masticatory muscles
- The role of muscles in stabilizing condyles
- The terminal hinge axis movement concept
- Stable centric relation: definition
- P.K. Thomas and Lauritzen manipulation and the P. Dawson maneuver: disadvantages
CR registration using hard wax (29 min) 6 topics
- The terminal hinge axis movement concept
- Stable centric relation: definition
- P.K. Thomas and Lauritzen manipulation and the P. Dawson maneuver: disadvantages
- Method of registration of the centric relation using wax plates
- Creation of an anterior occlusal stop: indications and methodology
- Reproducibility of the central ratio: Split cast technique
Centering function of occlusion: basic concepts (20 min) 4 topics
- Transverse stability of the centric relation
- The difference between ICP and RCP in the transversal direction
- Guiding function: influence on the movement of mandible
- The principle of the anterior guide
Occlusion dysfunctions (40 min) 6 topics
- Guiding dysfunction: interferences
- Determination of the posterior interference
- Guide for laterotrusion: classification
- Anterior interference
- Retroactive control
- Premature contact on the posterior teeth: causes
The main components of the OCTA concept (31 min) 11 topics
- The OCTA or eight occlusal criteria of reconstruction are:
- the reference plan
- the reference position, the therapeutic position
- the VDO
- mandibular incisor position
- maxillary incisor position
- the plan of occlusion and the curve of Spee
- the incisal guidance
- the cusp height and the curve of Wilson
- Prosthodontic determining factors: aesthetics, resistance, function
- Axis-orbital plane (AOP)
Definition of the reference plane (36 min) 5 topics
- Use of the facebow for fixing horizontal reference plane
- ARP index
- The use of the facebow as a guide
- Facial asymmetry
- 3 possible options for creating a horizontal reference plane
The concept of mandible reference position and the vertical dimension of occlusion (22 min) 3 topics
- Mandible reference position of due to the work of the muscles
- Reproducible positions: ICP and CR
- Stable and unstable ICP
Reposition of the mandible and determination of the VDO (20 min) 3 topics
- Therapeutic position: ICP registration
- Changing the VDO: techniques
- Repositioning of mandible: anteposition
Choosing the position and inclination of anterior teeth (29 min) 4 topics
- VDO selection
- Position of the mandibular anterior teeth
- Inclination of anterior teeth: the tangent law
- Data transfer to the articulator
Principles of reproduction of occlusal curves (22 min) 3 topics
- Maxillary anterior teeth double function
- The position of maxillary canines relative to the lip
- Formation of inclination of the occlusal plane
Features of the curve of Spee formation (25 min) 7 topics
- The radius of the curve of Spee and the morphology of the mandible: the relationship
- Tangent law: the geometric concept of the curve of Spee
- Features of inclination of the lower molar
- The phenomenon of mesial drift
- Calculation of the radius of the curve of Spee: methods
- The system of transferring curves to the model: the system of flags and the technique of templates
- Setting teeth by sphere
Curve of Wilson formation (36 min) 8 topics
- Inclination of anterior guidance
- Natural occlusion and therapeutic concept: differences
- Group and canine guidance
- Sagittal condylar inclination and anterior guiding angle: correlation
- Morphology of deocclusions between the posterior teeth
- The curve of Wilson: static and kinematic points of view
- Transfer of the curve of Wilson to the articulator: methodology
- The curve of Wilson control in prosthodontics
TMD: definition. Mythbusting (39 min) 9 topics
- Disputes and confusion in the TMD concepts
- TMD: definition and prevalence
- Criteria for the diagnosis of TMD: “SAD”
- Psychosocial status in the diagnosis of TMD
- 3D-model of etiopathogenesis of TMD
- Classification of TMD
- Mistakes in the diagnosis of TMD
- Primary and secondary TMD
- Occlusal dysesthesia
Mistakes in the TMD diagnosis (21 min) 3 topics
- Thinking strategy: errors in the diagnosis of TMD
- Primary and secondary TMD
- Occlusal dysesthesia
Diagnosis of articular forms of TMD (44 min) 9 topics
- Classification of articular forms of TMD
- Partial desunion with reduction
- Total desunion with reduction
- Diagnosis of desunion by MRI
- Condylography: decoding
- Subluxation of the articular disc: diagnosis and the need for treatment
- Disunion without reduction
- Permanent complete disconnection of the “disc-condyle” complex with degenerative remodeling of the articular tubercle
- Algorithm for diagnosis of TMD
Strategies for the treatment of TMD. Non-invasive treatment (23 min) 7 topics
- Strategies for the TMD treatment: scheme
- Non-invasive treatment: myogymnastics
- Myogymnastic exercises
- Prosthetic treatment: the use of an occlusal splint
- Criteria and indications for the manufacture of occlusal splints
- Repositioning splint: Gelb design
- Step-by-step protocols of working with splints
Invasive treatment. Emergency situations (32 min) 4 topics
- Invasive treatment vs hypertreatment
- Algorithm for choosing a strategy for the treatment of TMD
- TMD: tactics in emergency situations
- Treatment of patients with a pronounced psychoemotional component
Working with occlusion in patients with TMD (47 min) 4 topics
- Frequency of influence of occlusion on therapeutic treatment
- Indications for changing occlusion in patients with TMD
- Prevention of relapses: modification of natural teeth
- Clinical cases
QA session 1 (1 h 06 min) 18 topics
- How to treat disc dysfunction with splints?
- The “Check bite” method – registration of SCI using protrusion bites – is it relevant?
- Checking the immediate desocclusion using SCI 25-30 degrees setting – is there any use?
- Comparison of occlusion equilibration in the mouth and in the articulator
- What to do in case of encountering of grade III articular disc dislocation acute stage during orthodontic treatment?
- Why do disfunction of TMJ appear after orthodontic treatment?
- How to deal with occlusal disesthesia?
- Occlusion during implant prosthetics
- How to check reference position during condylography?
- What does physiotherapy include?
- Is there any danger of intruding teeth in Gelb Splint design?
- Could the SCI be changed during person’s life?
- Is it required to treat grade III of articular disc dislocation after restoring of the range of mouth opening?
- Features of electromyography usage
- Botox therapy. Its relevance
- How to avoid Sunday bite when reaching anterior therapeutic position in Class II-1?
- How to increase the VDO in Class II patient with overjet and tooth wear without mandibular distalisation?
- Distraction of TMJ on splint with reposition in case of disunion without reduction
QA session 2 (1 h 07 min) 7 topics
- Guidance information: what inclination of the palatal side of upper incisors we have to do? What inclination of upper incisors we have to set on an incisal table in case of different sagittal condylar inclination of the right and left TMJ?
- Splint therapy: what splint to use in case of combined TMD with internal derangement and muscle pain
- Differential diagnosis: how to differentiate TMD from trigeminal neuralgia and tension like headache
- Pre-ortho TMD care: what strategy to use when you performing initial therapy of TMD with splint and patient has to undergo orthodontic treatment. Would splint to use during orthodontic treatment?
- Functional guarantee: can we guarantee to the patient that if we perform condylography and use customised settings of the articulator and do the Slavicec wax-up he wouldn’t have ceramic chipping or any TMD symptoms
- Condylar inclination asymmetry: what to do in case of significant difference of sagittal condylar inclination between eight and left side when needed a total rehabilitation
- Bennet movement: influence of immediate side shift on prosthetic restorations function
Before you buy
Does it assume prior knowledge of occlusion?
Early lessons revisit definitions, but the course moves quickly into reconstruction planning, so a basic grounding in articulators and centric relation helps.
Are some topics repeated?
Yes. A few items, such as the hinge-axis concept and primary versus secondary TMD, appear in two consecutive lessons.
Do I get CME credit or a certificate?
No. Clinicapedia provides the educational content only — no CME or CE credits, MOC points or certificates of completion are included with this product.
Specifications
| Format | Online video course |
|---|---|
| Instructor | Jean-Daniel Orthlieb |
| Contents | 22 lessons, including 2 Q&A sessions |
| Duration | 12 h 13 min |
| Access | Lifetime, self-paced |
| Department | Dentistry |
| Delivery | Instant download · lifetime re-download |
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