Comparison of two scales in the assessment of muscle and joint palpation tenderness in chronic temporomandibular disorders Volume 8

Following the guidelines of the Craniomandibular Index, 23 chronic patients had 42 muscle and temporomandibular joint sites palpated. Two- and four-point scales were generated in response to the patient's reactions. After 6 weeks of treatment, patients measured with the 2-point scale showed 6.39% improvement in muscle tenderness and patients measured with the 4-point scale showed a 14.99% improvement. These changes were significantly different. Correlation between scales was r = .88 originally and increased to r = .91 after 6 weeks. Results showed that the 4-point scale is significantly more able to detect clinical changes in muscle and joint tenderness than is the 2-point scale.