Temporomandibular Disorder (TMD) Evaluation and Conservative Management
Dental Procedures
≈ ¥300-1200
(≈ $45-170)
1 min
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Description
Estimated cost for Temporomandibular Disorder (TMD) Evaluation and Conservative Management at general public hospitals in China is about ¥210-960, and at Grade 3A hospitals about ¥300-1200, varying by hospital tier and region.
Main Uses
Primary clinical uses include: differential diagnosis of orofacial pain, identification of musculoskeletal vs. articular TMD subtypes (DC/TMD criteria), guiding conservative management (e.g., occlusal splints, physical therapy, behavioral interventions), monitoring treatment response over time, and ruling out red-flag conditions (e.g., malignancy, infection, rheumatoid arthritis). Applicable in dental, orofacial pain, physical medicine, and rehabilitation settings for adults and adolescents with jaw pain, clicking, locking, or chewing difficulty.
Normal Range
TMD assessment is a clinical, non-laboratory evaluation and does not yield numerical 'values' with standardized reference ranges. It relies on qualitative and semi-quantitative measures: pain intensity (0–10 VAS scale, normal = 0), maximal unassisted mouth opening (35–50 mm in adults, <35 mm suggests limitation), joint sounds (absent = normal), passive/active mandibular mobility (symmetrical, pain-free), and absence of tenderness on palpation of masticatory muscles and TMJ. No serum biomarkers or imaging metrics have universally accepted 'normal ranges' for routine TMD diagnosis.
Low Values - Possible Causes
Low mouth opening (<35 mm) may result from: 1) intra-articular disc displacement without reduction, 2) TMJ osteoarthritis with joint space narrowing and bony ankylosis, 3) myofascial pain with severe muscle spasm or contracture, 4) post-traumatic fibrosis or scarring, 5) chronic untreated bruxism leading to adaptive muscle shortening.
High Values - Possible Causes
Excessive or hypermobile jaw movement (e.g., >60 mm opening, lateral excursion >12 mm) may be associated with: 1) ligamentous laxity (e.g., Ehlers-Danlos syndrome), 2) recurrent anterior disc displacement with reduction causing 'clicking + hypermobility', 3) iatrogenic over-manipulation during dental procedures, 4) psychogenic or functional jaw hypermobility (rare), 5) congenital TMJ capsule insufficiency.