The changing landscape of temporomandibular disorder management: Beyond the mechanical mindset
Year: 2025
Type: article
Abstract: Temporomandibular disorders (TMDs) have perplexed clinicians and researchers for decades, often leading to shifting theories and evolving treatment strategies. Not too long ago, TMD was perceived almost exclusively through a mechanical lens – malocclusion, improper bite forces, and temporomandibular joint (TMJ) misalignment were thought to be the primary culprits. Treatment, in turn, was centered around occlusal adjustments, splints, and, in severe cases, surgery. Today, however, we are in the midst of a paradigm shift. A more sophisticated, biopsychosocial understanding of TMD has emerged, challenging long-held beliefs, and reshaping how we diagnose and manage these conditions. In addition, emerging evidence on genetic predisposition and neuroplasticity in chronic pain suggests that some patients may have an inherent vulnerability to developing persistent TMD symptoms, warranting further investigation.[1,2] FROM A MECHANICAL DISORDER TO A MULTIFACTORIAL CONDITION For years, dental education ingrained in us the notion that occlusal discrepancies were the primary cause of TMD. Splints were the go-to solution, with the rationale that correcting bite relationships would alleviate joint stress and pain. Many patients underwent irreversible dental procedures, such as occlusal adjustments and full-mouth rehabilitations, based on the assumption that their malocclusion was the root cause of their symptoms. Yet, as research advanced, the expected correlation between occlusal factors and TMD failed to hold up. Large-scale studies found no definitive link between occlusal discrepancies and TMD symptoms, leading to a growing skepticism about the traditional mechanical model. What emerged instead was a broader recognition that TMD is a complex disorder influenced by musculoskeletal, neurological, and psychosocial factors. Bruxism, once blamed on occlusal interferences, is now better understood to be other than merely an occlusion-driven issue. Furthermore, bruxism itself is multifaceted, with distinct awake and sleep-related variants that have unique etiologies, including potential links to airway obstruction and sleep disturbances. An increasing body of evidence suggests that sleep-disordered breathing and airway dysfunction may contribute to TMD, reinforcing the need for interdisciplinary collaboration between dentistry, sleep medicine, and orofacial pain specialists. This insight has led to growing interest in the role of sleep medicine in TMD management, as well as the necessity of interdisciplinary collaboration.[1] RETHINKING DIAGNOSIS: MOVING BEYOND THE JOINT This evolving understanding of TMD has necessitated a reassessment of how we diagnose the condition. Traditionally, diagnostic approaches focused heavily on imaging – X-rays, computed tomography scans, and magnetic resonance imagings (MRIs) – To detect structural abnormalities in the TMJ. However, as we have seen in other areas of medicine, pathology on imaging does not always correlate with clinical symptoms. Many patients with significant joint changes on MRI remain asymptomatic, while others with debilitating pain show little to no structural abnormalities.[3] Today, functional assessment has taken precedence over purely structural diagnosis. The emphasis has shifted toward pain mapping, muscle palpation, range of motion testing, and evaluating psychosocial factors such as stress and anxiety. The adoption of standardized diagnostic protocols, like the Diagnostic Criteria for TMDs, reflects this change in focus. Importantly, the role of the prosthodontist remains central in this process, as they are uniquely positioned to evaluate the functional and occlusal aspects of TMD within the broader interdisciplinary framework. No longer do we rely solely on imaging to guide treatment; rather, we consider the patient as a whole, understanding that pain perception and disability are influenced by far more than just the joint.[2] BEYOND SPLINTS: A SHIFT IN TREATMENT PHILOSOPHY Perhaps, the most significant sign of our progress is how treatment strategies for TMD have evolved. Splints and occlusal adjustments, once the mainstays of treatment, are no longer the default solutions. While certain cases may still benefit from stabilization splints, their role has become more selective and tailored rather than universally prescribed. We now recognize that the effectiveness of occlusal splints is often linked to their ability to reduce muscle tension and may involve placebo effects rather than directly correcting occlusion.[4] Instead, a conservative, multidisciplinary approach has taken center stage. We now appreciate that TMD, much like other chronic pain conditions, requires a combination of pain management strategies, behavioral interventions, and functional rehabilitation. The modern management of TMD incorporates physical therapy to improve muscle function and reduce myofascial pain, cognitive behavioral therapy to address stress-related clenching and bruxism, pharmacological approaches, including nonsteroidal anti-inflammatory drugs, muscle relaxants, and even low-dose antidepressants for chronic pain and botulinum toxin injections, which are emerging as a promising option for myofascial pain. Importantly, we have moved away from invasive treatments and irreversible procedures, reserving surgery only for severe cases such as ankylosis or complete joint degeneration. This conservative shift is a welcome departure from the past, where patients often underwent aggressive treatments with limited long-term benefits.[1,3,5] WHERE DO WE GO FROM HERE? The journey of understanding TMD is far from over. While we have made great strides in recognizing its multifactorial nature, there are still gaps in knowledge that need to be addressed. What is clear, however, is that our approach to TMD can no longer be simplistic or narrow. We have indeed come a long way from the days of splints and occlusal adjustments dominating TMD management. The challenge now is to continue refining our understanding, ensuring that our patients receive treatments that are truly effective, ethical, and based on the latest scientific evidence.
Authors: Manish Katyayan, Preeti Agarwal
Institution: Government Dental College and Hospital
Language: English
Subfield: Complementary and Manual Therapy
Field: Health Professions
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W4409347569