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This article, authored by Dr. David Hunt and published in *Inside Dentistry*, examines abfractive lesions from a biologically driven, system-based perspective. Rather than viewing these lesions as isolated incidents of cervical tooth damage, the article repositions them as visible indicators of deeper dysfunction—particularly involving occlusion, muscle activity, and joint instability. Dr. Hunt urges clinicians to look beyond localized symptoms and approach abfraction as a sign of compromised function that requires diagnosis and treatment of the entire stomatognathic system.
Understanding Abfractive Lesions
Abfractive lesions, often seen as wedge-shaped notches at the cervical areas of teeth, have traditionally been linked to brushing habits or acidic erosion. However, recent research—and Dr. Hunt’s clinical observations—suggest that many of these lesions stem from mechanical flexure due to occlusal overload. As teeth bend under lateral forces, microfractures form at their weakest point: the cervical region.
The article emphasizes that these lesions are not merely cosmetic defects or hygiene-related damage. They reflect the way the tooth and surrounding structures are coping with chronic biomechanical stress—especially in the absence of proper anterior guidance or joint stability.
The Role of Occlusion and Functional Breakdown
Dr. Hunt connects the development of abfractive lesions to a breakdown in biologic occlusion. When posterior teeth remain in contact during excursive movements, harmful lateral forces are transferred through the roots and cervical areas of teeth. Without proper anterior guidance to disclude the posteriors, these repeated stresses cause the enamel to flex, fracture, and ultimately abfract.
Additionally, cases of temporomandibular dysfunction or condylar displacement often introduce asymmetrical loading, further exacerbating the development of these lesions. The article encourages practitioners to assess wear patterns, joint health, and parafunctional habits when evaluating patients with visible abfractions.
Diagnostic and Therapeutic Strategy
To properly address abfractive lesions, Dr. Hunt advocates for a joint-based, muscle-deprogrammed diagnostic workflow. This begins with MAGO splint therapy to establish a repeatable, healthy condylar position and relieve muscle hyperactivity. Once stabilization is achieved, the clinician can mount models in centric relation and assess the true occlusal scheme.
Wax-ups designed with biologic principles—especially anterior guidance and posterior disclusion—serve as blueprints for provisional and final restorative designs. In cases where abfractive lesions are symptomatic or structurally compromising, additive restoration using conservative bonded materials may be indicated, but only after functional harmony is restored.
The Limitations of Restorative-Only Approaches
The article warns against restoring abfractive lesions without first resolving the functional cause. Placing composite or glass ionomer in the cervical area of a stressed tooth may offer short-term cosmetic improvement, but it does nothing to address the forces causing the lesion. Often, these restorations fail, dislodge, or contribute to continued deterioration if occlusal forces remain uncorrected.
True treatment requires system correction, not patchwork repair. Dr. Hunt’s case examples show how addressing joint position and anterior guidance not only halts lesion progression but may reduce or eliminate the need for restorative material altogether. In short: fix the system, and the lesions stop forming.
Integrating Bioesthetic Principles
The solution to abfractive lesions lies in restoring the oral system to its biologic ideal. This means designing restorations that mirror natural tooth form and function, prioritizing proper joint position, and eliminating harmful lateral occlusal forces. Anterior guidance plays a central role, acting as a protective mechanism for the posterior teeth and cervical structures.
Dr. Hunt underscores that patients who present with abfractive lesions often show other signs of system breakdown—joint sounds, facial asymmetry, tooth mobility, or muscle tenderness. Recognizing these patterns is key to guiding treatment toward long-term success and avoiding further structural loss.
Key Clinical Takeaways
- Abfractive lesions are biomechanical in nature, often caused by lateral occlusal stress—not brushing or erosion alone.
- They signal deeper dysfunction in the joint-muscle-tooth system and must be assessed as part of the whole.
- MAGO splint therapy allows for joint stabilization and accurate diagnosis of occlusal relationships.
- Anterior guidance and posterior disclusion are essential in preventing harmful cervical flexure.
- Restoring lesions without correcting occlusion leads to repeated failure and continued damage.
- Bioesthetic Dentistry provides the diagnostic and design tools to treat the root cause—not just the symptoms—of abfraction.
This article redefines the clinical narrative around abfractive lesions. Rather than isolated problems of enamel loss, they are signs of a compromised oral system in need of functional repair. Through biologically grounded diagnosis and treatment, clinicians can move beyond patching teeth to preserving them—and restoring long-term health and esthetics.
Read the full article here.