Three-dimensional spatial analysis of temporomandibular joint in adolescent Class II division 1 malocclusion patients: comparison of Twin-Block and clear functional aligner

Table 5 Comparison of the TMJ measurements between the two groups before orthodontic treatment (x ± s, mm)

Variable	Clear functional aligners	Twin-Block appliance	T	P-value
AJS	2.72 ± 0.25	2.75 ± 0.20	-0.773	0.441
SJS	2.88 ± 0.24	2.93 ± 0.17	-1.168	0.246
PJS	2.57 ± 0.24	2.61 ± 0.24	-0.913	0.363
MJS	2.87 ± 0.19	2.88 ± 0.19	-0.074	0.941
LJS	2.68 ± 0.19	2.61 ± 0.24	1.524	0.131
WGF	28.94 ± 0.94	29.12 ± 1.30	-0.806	0.422
DGF	13.36 ± 0.73	13.64 ± 0.78	-1.800	0.075
HC	9.00 ± 0.56	9.22 ± 0.56	-1.937	0.056
SCA (°)	73.27 ± 2.03	73.82 ± 2.45	-1.208	0.230
HCA (°)	73.26 ± 2.57	72.68 ± 3.11	1.012	0.314
IEDC	16.43 ± 1.36	16.72 ± 1.97	-0.857	0.393
APDC	8.41 ± 0.40	8.51 ± 0.66	-0.848	0.399
VC (mm³)	1186.50 ± 150.30	1190.86 ± 243.23	-0.106	0.916
SC (mm²)	1500.24 ± 107.39	1495.45 ± 197.66	0.148	0.883
LMR	59.80 ± 3.23	60.45 ± 4.84	-0.780	0.437
LMB	78.94 ± 1.94	79.23 ± 4.18	-0.437	0.663
WMR	31.55 ± 2.16	31.15 ± 2.20	0.896	0.373
ML	112.29 ± 2.60	113.61 ± 4.83	-1.663	0.100

TMJ temporomandibular joint, AJS anterior joint space, SJS superior joint space, PJS posterior joint space, MJS medial joint space, LJS lateral joint space, WGF width of the glenoid fossa, DGF depth of the glenoid fossa, HC height of the condyle, SCA sagittal condylar angle, HCA horizontal condylar angle, IEDC internal and external diameters of the condyle, APDC anterior and posterior diameters of the condyle, VC volume of the condyle, SC surface area of the condyle, LMR length of mandibular rami, LMB length of the mandibular body, WMR width of the mandibular rami, ML mandibular length

ISSN: 1746-160X