Screening for Bruxism-Related Tooth Wear: Evidence-Based Approaches for Clinical Practice

Abstract

Bruxism, characterized by repetitive jaw-muscle activity involving clenching or grinding of the teeth, is a prevalent yet frequently underdiagnosed condition that can lead to significant tooth wear and subsequent oral health complications. Early screening for bruxism-related tooth wear in both pediatric and adult populations plays a pivotal role in mitigating long-term dental destruction, preserving function, and informing targeted management strategies. This review synthesizes recent research, elucidates the underlying mechanisms, evaluates risk factors, discusses clinical presentations, and provides a detailed approach to diagnosis and management. Emphasis is placed on integrating guideline-based recommendations and emerging diagnostic technologies to optimize patient outcomes in dental and multidisciplinary healthcare settings.

Introduction

Bruxism, encompassing both sleep and awake subtypes, is increasingly recognized as a significant contributor to tooth wear, hypersensitivity, and restorative failure. As dental professionals and clinicians encounter patients with unexplained dental attrition, the need for systematic screening protocols has become more apparent. Effective identification and management of bruxism-related tooth wear require a nuanced understanding of the condition’s heterogeneity, multifactorial etiology, and potential for progression. This review aims to provide healthcare practitioners with a comprehensive, evidence-based framework for screening, diagnosing, and managing bruxism-induced dental wear.

Epidemiology / Disease Burden

Bruxism affects approximately 8–31% of the general population, with prevalence estimates varying by age, diagnostic criteria, and assessment methodology. Sleep bruxism is found in 13% of adults and up to 40% of children, while awake bruxism is reported in 20% of adults. The prevalence of associated tooth wear is higher in populations with undiagnosed or untreated bruxism. The burden of disease extends beyond dental attrition, encompassing increased rates of restorative failure, dental hypersensitivity, temporomandibular disorders (TMD), and diminished quality of life. A systematic review by Manfredini et al. (2022) underscores the global impact of bruxism-related tooth wear and the importance of early intervention to prevent irreversible damage.

Pathophysiology

The pathogenesis of bruxism-related tooth wear is multifactorial and involves complex interactions between central nervous system mechanisms, peripheral neuromuscular activity, and occlusal factors. Sleep bruxism is believed to be a sleep-related movement disorder associated with micro-arousals and alterations in neurotransmitter activity, particularly dopamine and serotonin pathways. This results in rhythmic masticatory muscle activity (RMMA), leading to repetitive high-force contacts between teeth. Over time, these forces contribute to progressive enamel loss, dentin exposure, and, in severe cases, pulpal involvement. Awake bruxism, more commonly driven by psychological stress and behavioral habits, also produces significant occlusal forces, though the mechanisms differ. The interplay of saliva composition, tooth structure, and parafunctional habits further modulates the extent of wear.

Risk Factors

Risk factors for bruxism and resultant tooth wear include genetic predisposition, psychosocial stress, anxiety disorders, sleep disturbances (such as obstructive sleep apnea), malocclusion, certain medications (notably SSRIs and stimulants), and lifestyle factors like tobacco, alcohol, and caffeine use. Recent genome-wide association studies implicate specific genetic variants in susceptibility to sleep bruxism. Pediatric populations may display transient bruxism related to developmental stages, while adults may experience persistent or stress-induced patterns. Identifying at-risk individuals through thorough history and risk stratification is essential for targeted screening and prevention.

Clinical Features

Bruxism-related tooth wear manifests as progressive loss of tooth structure, particularly on occlusal and incisal surfaces. Key clinical signs include flattened cusps, enamel fractures, dentin exposure, hypersensitivity, and, in advanced cases, reduced vertical dimension. Associated findings may include linea alba, buccal mucosa ridging, tongue indentations, and hypertrophy of the masseter muscles. Patients may report jaw discomfort, morning headaches, or awareness of clenching/grinding. It is crucial to differentiate bruxism-induced wear from erosion (acid-mediated), attrition (tooth-to-tooth contact), and abrasion (foreign object-mediated) through comprehensive examination and history taking.

Diagnosis

Diagnosis of bruxism-related tooth wear is multifaceted, integrating patient-reported symptoms, clinical examination, and, when indicated, adjunctive diagnostic modalities. Screening begins with a focused history addressing parafunctional habits, sleep quality, medication use, and temporomandibular symptoms. Clinical evaluation should document the pattern, location, and extent of tooth wear, as well as associated soft tissue and muscular findings. Standardized tools such as the Tooth Wear Evaluation System (TWES) and the Bruxism Assessment Questionnaire provide structured assessment. In select cases, polysomnography with electromyography (EMG) is the gold standard for confirming sleep bruxism, though its use is limited to research or refractory cases. Wear facets, attrition scores, and photographic documentation are valuable for longitudinal monitoring.

Treatment & Management

Management of bruxism-related tooth wear is multidisciplinary, aiming to reduce further wear, alleviate symptoms, and restore dental function. First-line interventions include patient education, behavioral modification strategies, and the use of custom-fabricated occlusal splints (nightguards) to mitigate nocturnal forces. Cognitive-behavioral therapy (CBT), biofeedback, and stress management are recommended for patients with significant psychological contributors. Dental rehabilitation, ranging from composite restorations to full-coverage crowns, may be indicated for advanced cases. Adjunctive therapies such as botulinum toxin injections have demonstrated efficacy in select refractory cases. Regular follow-up and reinforcement of preventive measures are critical to long-term success.

Recent Advances / Emerging Therapies

Recent advances in bruxism screening include the integration of digital intraoral scanners and artificial intelligence-assisted wear detection, enabling objective, reproducible quantification of tooth surface loss. Wearable EMG devices and smartphone-based monitoring applications offer promising avenues for ambulatory bruxism detection and patient engagement. Pharmacological interventions targeting neurotransmitter pathways remain investigational but hold potential for future therapy. Additionally, updated consensus definitions and grading systems from international dental associations facilitate standardized diagnosis and communication among clinicians.

Guideline Recommendations

Current guidelines from the American Academy of Sleep Medicine (AASM) and the European Academy of Dental Sleep Medicine (EADSM) emphasize the importance of early screening and individualized management of bruxism-related tooth wear. Recommendations include routine assessment for bruxism in patients presenting with unexplained tooth wear, use of validated screening tools, and consideration of multidisciplinary referral for complex cases. Prophylactic use of occlusal splints is advocated in high-risk populations, with periodic reassessment to monitor progression and intervention efficacy.

Conclusion

Screening for bruxism-related tooth wear is an essential component of comprehensive dental care, particularly given the high prevalence and potential for severe oral health consequences. Early identification, risk stratification, and evidence-based management can substantially reduce the burden of disease and enhance patient outcomes. Ongoing research and technological innovation continue to refine screening modalities and therapeutic options, underscoring the need for clinicians to remain informed and proactive in the care of patients with bruxism.