Table 2.

Prevalence of TMD Diagnoses According to the Axis I of RDC/TMD

TMJ Subtypes	Yes n (%)
Group I: Muscle Diagnosis
Ia: Myofascial pain	10 (33.3)
Ib: Myofascial pain with limited opening	16 (53.3)
Group II: Disc Displacements on the Joint
	Right Joint Yes n (%)	Left Joint Yes n (%)
IIa: Disc displacements with reduction	16 (53.3)	18 (60)
IIb: Disc displacements without reduction, with limited opening	1 (3.3)	1 (3.3)
IIc: Disc displacements without reduction, without limited opening	0	0
Group III: Other Joint Conditions
	Right Joint Yes n (%)	Left Joint Yes n (%)
IIIa: Arthralgia	13 (43.3)	15 (50)
IIIb: Osteoarthritis	7 (23.3)	8 (26.7)
IIIc: Osteoarthrosis	3 (10)	3 (10)