Jaw Function & Pain (TMJ)

MODJAW® and 4D Functional Diagnostics

Why Modern Dental Rehabilitation Requires More Than Just a Static Bite

How dynamic movements of the lower jaw are changing prosthetic planning—and why, in complex rehabilitation cases, a scientifically sound, comprehensive approach is key, rather than relying on a single device.

Prof. Dr. med. dent. Andreas Olze, Author

Updated: November 2026Approx. 10 min. reading time

A smiling patient in the dental chair during a dental examination prior to dental rehabilitation

Key Points at a Glance

MODJAW® optically captures the movements of the lower jaw in real time and links them to digital dental models—creating a dynamic 4D model of jaw function.
This is particularly helpful in cases of bite adjustment, severe tooth wear, extensive dental restorations, implant treatments, and following failed treatments.
Motion data is not a diagnosis: It complements clinical examinations, X-rays, and functional analysis, but does not replace them.
“Biological dentistry” is not a uniformly defined specialty—what matters most are the indication, the evidence, and the quality of the overall treatment.

When a static bite doesn't tell the whole story

Planning a complex dental rehabilitation is one of the most challenging tasks in modern dentistry. Particularly in cases of severe tooth wear, reduced occlusal height, extensive tooth loss, functional problems, or previous failed prosthetic restorations, it is often not enough to simply examine the existing tooth contacts.

Traditionally, static occlusion is recorded—that is, the contacts between the teeth during the final bite, usually in the habitual occlusion. However, the masticatory system is not a static structure: the lower jaw, upper jaw, temporomandibular joints, masticatory muscles, teeth, and periodontium form a closely interconnected system that is constantly in motion. It opens and closes, glides forward and to the side, and performs complex movements during chewing.

A static bite registration can therefore only capture a limited aspect of this function. This is where dynamic functional diagnostics with MODJAW® comes into play.

MODJAW®: From a Static Articulator to a Dynamic 4D Patient Model

MODJAW® is an optical system for three-dimensional, real-time recording of individual mandibular movements—a 4D real-time measurement of jaw function. While traditional articulators simulate jaw movements based on mechanical settings, MODJAW records the patient’s actual movement patterns.

To do this, a camera system tracks the position of optical reference markers. The recorded movements are linked to digital models of the dental arches—creating a dynamic digital representation of the individual’s jaw function. The term “4D” refers to the combination of the three spatial dimensions with time.

Here's how MODJAW works to optically record lower jaw movements.

What Can Be Captured and Presented

Opening and closing movements of the lower jaw
Protrusion Movements
Side-to-side movements to the right and left (laterotrusion)
Individual movement patterns of the lower jaw
dynamic contact between the rows of teeth
Movement Patterns in Functional Movements

In short, thisprovides information that a purely static analysis cannot convey in the same way: the actual movement of the individual’s lower jaw.

When Dynamic Function Analysis Is Especially Important

The requirements for functional planning differ between a small single-tooth restoration and a complete rehabilitation of the masticatory system. Dynamic diagnostics are particularly relevant in four situations:

Significant tooth wear and reduced bite height

In cases of significant abrasion or attrition, it is often not just the hard tooth structure that has been lost—the vertical dimension of the occlusion may also have changed. A planned occlusal elevation for worn teeth —such as an all-ceramic occlusal elevation —must therefore take more into account than just the desired distance between the upper and lower jaws: It is crucial to consider how the new occlusal height fits into the individual’s movement pattern and what relationships between the teeth, temporomandibular joints, and muscles must be taken into account.

Comprehensive Prosthetic Rehabilitation

When multiple teeth are restored at the same time—for example, as part of a comprehensive dental rehabilitation—the new tooth contacts become part of an altered overall functional system. Planning errors can affect the entire restoration. Dynamic recording can help identify problematic contacts and unfavorable movement patterns and take them into account when designing the final restorations—from dental crowns to bridges and dentures.

Implant-Supported Dentures

Unlike natural teeth, implants do not have a periodontal ligament with a spring-like fiber structure. Their load-bearing mechanism therefore differs significantly. For implant-supported restorations, motion analysis can provide additional information for planning occlusion and dynamic contacts—especially in challenging situations such as complex implant cases or when implants are placed despite damaged jawbone. It does not replace the biomechanical assessment of implant positions, bone conditions, and prosthetic design.

Previous Failed Treatments

Advanced functional diagnostics can be particularly valuable when symptoms persist after extensive treatment or when technical complications occur repeatedly. In such cases, the goal is not to rush into creating a new restoration, but rather to first determine which factors contributed to the previous failure—for example, by seeking a second dental opinion.

The key question: What happens to the data?

The recording of mandibular movements is, first and foremost, a diagnostic measurement. Its value is derived only through proper interpretation and integration into the overall treatment plan. A digital movement model alone does not constitute a diagnosis: It does not automatically determine whether a particular mandibular position is therapeutically appropriate, whether symptoms originate from muscles or joints, or whether the bite will remain stable in the long term.

To this end, additional information is being compiled:

Clinical examination of the teeth and periodontium
Assessment of the Temporomandibular Joints and Masticatory Muscles
Analysis of Static and Dynamic Occlusion
Digital Scanning of the Dentition
Assessment of the Vertical Dimension
X-ray diagnostics and, when indicated, three-dimensional imaging
Analysis of the Initial Prosthetic and Surgical Situation

Close-up of the dental arches using a dental mirror during an occlusion check

Synoptic Treatment Planning

"Synoptic" means that treatment does not focus on individual teeth or isolated technical problems, but rather considers all relevant findings in terms of their interrelationships. This is precisely what distinguishes a modern device from a scientifically sound treatment concept.

Clinical functional diagnostics remain the foundation of this approach—learn more on our page about functional analysis and TMD treatment, and in the professional article “TMD and Malocclusion.”

Biological Dentistry: Objectives and Scientific Classification

The term “biological dentistry” has gained prominence in recent years. It is often associated with biocompatible materials, metal-free restorations, minimally invasive procedures, a holistic approach, and the avoidance of potentially harmful substances. Many of these aspects are indeed relevant to responsible dentistry: the biocompatibility of dental materials, the avoidance of unnecessary tissue damage, and the preservation of biological structures are all part of every modern treatment.

However, a distinction must be made between scientifically defined concepts and a broadly defined marketing term. Biological dentistry is not a uniformly defined, independent discipline with binding diagnostic and therapeutic standards. And a material described as biocompatible does not automatically guarantee a better long-term prognosis. The decisive factors are the indication, scientific evidence, the individual circumstances, and the quality of the overall treatment.

Truly biologically responsible dentistry is therefore not limited to the choice of materials. It preserves natural structures, takes inflammatory processes into account, avoids unnecessary interventions, and strives for long-term functional and prosthetic stability.

In short, biocompatibilityis an important property of a dental restoration. However, it is no substitute for scientifically sound treatment planning.

Digital Functional Diagnostics as Part of the Overall Approach

4D diagnostics only realize their full potential when used as part of a comprehensive treatment plan. At our practice in Berlin Mitte, we therefore do not use MODJAW as a standalone technical service, but rather integrate the data into the planning of complex restorative and prosthetic treatments—from dental prostheses (see also Overview of Dental Prosthesis Types) to full-mouth rehabilitation. Typical questions in this context include:

What are the functional requirements prior to a planned bite elevation?
How do the individual movements of the lower jaw occur?
What dynamic tooth contacts must be taken into account during reconstruction?
How can new tooth shapes be integrated into an individual's movement pattern?
What functional aspects should be considered with implant-supported restorations?
What additional tests are needed if previous treatment has not produced the desired results?

In cases of extensive rehabilitation, digital functional analysis also improves communication between dentists, dental technicians, and, when necessary, surgical specialists. The goal is not to digitize every treatment to the maximum extent possible—but rather to use the available information in a way that makes decisions more transparent and planning more personalized.

A look inside our practice—including a demonstration of functional diagnostics using MODJAW®.

Scientific expertise determines the value of the technology

Modern diagnostics are only as good as the professional expertise used to interpret their results. Especially in cases of complex prosthetic rehabilitation, functional diagnostics, restorative dentistry, prosthodontics, implantology, periodontology, and, if necessary, oral surgery must be integrated.

Under the expert guidance of Prof. Dr. Andreas Olze, Schöne Zähne Berlin therefore does not focus on the isolated application of a technology, but rather on its integration into a scientifically sound overall concept. The crucial question is not which device a practice owns—but rather what information is needed for a specific treatment, how that information is interpreted, and what consequences actually result from it.

Precision begins before the actual treatment

Anyone facing extensive dental restoration, a bite elevation, or a complex implant procedure should be aware that the quality of treatment does not begin with the placement of crowns or implants, but with a careful analysis of the initial condition. Especially in the case of extensive and irreversible procedures, it is important to understand the functional, biological, and prosthetic interrelationships as thoroughly as possible.

MODJAW can make a valuable contribution in this regard—not as a substitute for clinical examination and not as a guarantee of treatment success, but as an additional source of diagnostic information.

In a nutshell: Ourmission isto combine modern technology with scientific expertise, clinical experience, and a holistic approach to the masticatory system—so that all available information can be used to develop a coherent, individualized, and sustainable long-term treatment plan.

Your Healthcare Providers

Who will examine you using MODJAW®?

In our practice, 4D functional diagnostics using MODJAW® are performed by experienced dentists, who also incorporate the motion data into the treatment plan. This means that measurement, evaluation, and treatment planning are all handled under one roof.

[Function / Focus]

[Name to be disclosed upon approval]

[A brief statement on the role in MODJAW® functional diagnostics]

[Function / Focus]

[Name to be disclosed upon approval]

[A brief statement on the role in MODJAW® functional diagnostics]

Schedule an appointment for functional diagnostics

Frequently Asked Questions

What is MODJAW®?

MODJAW® is a digital optical system for the three-dimensional capture and visualization of individual mandibular movements in real time. It links the recorded movements with digital dental models, thereby enabling a dynamic analysis of jaw function.

What does 4D diagnostics mean in dentistry?

4D refers to the combination of the three spatial dimensions and time. While a traditional digital image shows a static situation, 4D functional diagnostics captures the movements of the lower jaw over time.

What is the difference between MODJAW and a traditional articulator?

A traditional articulator simulates jaw movements using mechanical adjustments and registrations. MODJAW optically records the patient’s individual movements so that this information can be incorporated into the digital planning process. Both methods have different applications and can complement each other.

Is MODJAW an alternative to traditional functional diagnostics?

No. MODJAW is a complementary technology. Clinical examination and assessment of the temporomandibular joints, muscles, and tooth contacts remain essential. The digital motion data are always interpreted in conjunction with the other findings.

For which treatments is MODJAW particularly effective?

This technology can be particularly helpful in cases of extensive prosthetic rehabilitation, planned occlusal elevation, severe tooth wear, complex implant-supported restorations, and challenging initial functional conditions. Whether the examination is appropriate in a specific case depends on the diagnosis and the planned treatment.

Can MODJAW help identify a malocclusion?

MODJAW visualizes individual movement patterns and dynamic tooth contacts, thereby providing additional clues about functional abnormalities. Whether a bite is actually pathological and what consequences this may have can only be determined through a comprehensive clinical examination.

Can MODJAW be used for bite correction?

Yes. If the occlusal height (vertical dimension) is altered, dynamic functional analysis can provide additional information to help account for movement patterns and dynamic contacts when planning the new tooth shapes. It does not replace a comprehensive functional and prosthetic evaluation.

Can MODJAW help with temporomandibular joint problems?

The recording can provide additional information about movement patterns and possible limitations. However, MODJAW alone cannot diagnose a temporomandibular joint disorder or determine its cause. This requires a targeted clinical examination and, if necessary, additional tests.

Is MODJAW also useful for implants?

In the case of implant-supported dental prostheses, motion analysis can provide additional information for designing the occlusion and tooth contacts—especially for extensive restorations. Implant position, bone conditions, and biomechanical loads must also be evaluated.

What is meant by synoptic treatment planning?

"Synoptic" means that all relevant findings are considered together and integrated into a coordinated treatment plan—including the teeth, periodontium, temporomandibular joints, masticatory muscles, occlusion, prosthetic status, and, if applicable, implantological or surgical aspects. The goal is a treatment approach that takes into account not just isolated individual problems, but the interrelationships of the entire masticatory system.

What is biological dentistry?

Biological dentistry is a broad term that encompasses concepts emphasizing biocompatibility, tissue preservation, inflammation prevention, and the preservation of natural structures. It is important to note that the term does not refer to a uniformly defined specialized discipline with binding standards. What matters is whether specific measures are scientifically sound and appropriate for the individual patient.

Does biological dentistry automatically mean metal-free dental restorations?

No. Metal-free materials can be appropriate in certain situations. The choice of material depends on the clinical situation, the load, the indication, and individual tolerance. There is no scientific basis for claiming that metal-free dental restorations are universally superior.

Is the MODJAW test stressful?

No. MODJAW uses optical motion tracking. The recording is non-invasive and does not involve X-rays.

Does MODJAW replace a DVT or an MRI?

No. MODJAW captures movement patterns and is not an imaging technique for bones, joint structures, or soft tissues. A CT scan or MRI can provide additional information when indicated. These techniques address different issues.

Why is a dentist's experience so important?

Digital movement data are, first and foremost, measurement values. Their significance only becomes clear through professional interpretation: Which findings are relevant, what further examinations are necessary, and what therapeutic measures are appropriate? In complex rehabilitation cases, therefore, it is not the equipment alone that matters, but the expertise of the treatment team.

Why does Schöne Zähne Berlin use MODJAW?

We view MODJAW as a complementary tool for comprehensive functional diagnostics. This allows us to take into account not only static tooth contacts but also individual movement patterns when performing complex restorative and prosthetic treatments. Depending on the indication, this information is incorporated into a synoptic treatment plan.

Is 4D functional diagnostics necessary for every patient?

No. For simple single-tooth restorations, conventional diagnostics are usually sufficient. In contrast, for extensive restorations or complex functional issues, an additional motion analysis can provide significant diagnostic value.

What distinguishes modern technology from modern dentistry?

Modern technology provides additional information. Modern dentistry interprets this information correctly and integrates it into a scientifically sound treatment plan. The quality of care is not determined by the device alone, but by the combination of diagnostics, clinical experience, evidence-based practice, and individualized planning.

Scientific Basis

Guidelines & Studies on This Topic

This professional article is based on the guidelines of the dental associations (DGZMK/AWMF) and on recent studies on the digital recording of mandibular movements.

S2k Guideline
Dental Functional AnalysisDGZMK · AWMF · 2022
PDF
S2k Guideline
Digital Impression Taking with Intraoral ScannersDGZMK · AWMF · 2025
PDF
S2k Guideline
Dental Digital Volumetric Tomography (DVT)DGZMK · AWMF · 2022
PDF
Study
In-vitro Accuracy of a Novel Jaw-Tracking TechnologyJournal of Dentistry · 2023
DOI
Study
Accuracy of the Maxillomandibular Relationship at the Centric Relation Position Recorded Using 3 Different Intraoral Scanners with or without an Optical Jaw Tracking SystemJournal of Dentistry · 2023
DOI
Study
Comparative Analysis of Three Jaw Motion Tracking Systems: A Study on Precision and TruenessJournal of Prosthodontics · 2025
DOI
Review
Jaw Tracking Systems in Digital Dentistry: A Systematic ReviewInternational Journal of Prosthodontics · 2026
DOI

Guidelines are decision-making tools for dentists. We’ll determine which treatment is right for you during a personal consultation.

A scholarly article by

Prof. Dr. med. dent.

Andreas Olze

Prof. Dr. Olze combines experience, precision and a passion for dentistry. His claim is top quality, which he creates every day together with his competent and empathetic team. His strength is his in-depth experience, with which he always treats his patients personally and at eye level.

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