Mandibular range of motion in children with juvenile idiopathic arthritis with and without clinically established temporomandibular joint involvement and in healthy children; a cross-sectional study

de Sonnaville, Willemijn F. C.; Speksnijder, Caroline M.; Zuithoff, Nicolaas P. A.; Verkouteren, Daan R. C.; Wulffraat, Nico W.; Steenks, Michel H.; Rosenberg, Antoine J. W. P.

doi:10.1186/s12969-021-00583-5

Pediatric Rheumatology

Table 3 Adjusted linear regression for mandibular range of motion variables, with correction for length and gender

From: Mandibular range of motion in children with juvenile idiopathic arthritis with and without clinically established temporomandibular joint involvement and in healthy children; a cross-sectional study

	AMIO		PMIO		Protrusion		Discrepancy in laterotrusion*
Variable	Regression coefficients (95% CI)	*P-value*	Regression coefficients (95% CI)	*P-value*	Regression coefficients (95% CI)	*P-value*	Regression coefficients (95% CI)	*P-value*
Age	1.30 (0.62–1.98)	0.000	1.48 (0.77–2.19)	0.000	0.28 (−0.06–0.51)	0.014	−0.01 (− 0.13–0.10)	0.859
Age squared (centered at 6)	−0.06 (− 0.12 – − 0.00)	0.036	− 0.07 (− 0.13 – − 0.01)	0.018	−0.02 (− 0.04–0.00)	0.029	0.00 (− 0.01–0.01)	0.550
Length	0.13 (0.09–0.0.16)	0.000	0.13 (0.10–0.16)	0.000	0.01 (0.00–0.02)	0.039	0.00 (−0.00–0.01)	0.410
Male gender	2.09 (0.82–3.36)	0.001	1.52 (0.17–2.86)	0.027	0.36 (−0.06–0.79)	0.096	−0.28 (− 0.07–0.49)	0.009
JIA subtype	0.00 (−0.01–0.02)	0.643	0.00 (− 0.01–0.02)	0.674	0.00 (− 0.01–0.00)	0.849	− 0.00 (− 0.00–0.00)	0.488
cJADAS	−0.39 (− 0.57 – − 0.21)	0.000	− 0.37 (− 0.56 – − 0.18)	0.000	−0.04 (− 0.10–0.03)	0.237	0.02 (− 0.01–0.05)	0.178
Medication use	− 2.00 (− 3.24–0.71)	0.002	−1.89 (− 3.22 – − 0.55)	0.006	−0.65 (− 1.07 – − 0.23)	0.003	0.67 (0.44–0.84)	0.000
Deviation AMIO**	−6.00 (−7.90 – − 4.10)	0.000	−5.44 (−7.41– − 3.47)	0.000	− 1.15 (− 1.81 – − 0.48)	0.001	0.91 (0.59–1.22)	0.000
Deviation protrusion**	−5.80 (−8.00 – − 3.59)	0.000	−5.40 (− 7.69 – − 3.12)	0.000	−1.30 (− 2.07 – − 0.53)	0.001	0.96 (0.60–1.32)	0.000
TMJ palpation pain	− 4.93 (− 7.34 – − 2.52)	0.000	− 4.86 (− 7.34 – − 2.37)	0.000	−1.30 (− 2.11 – − 0.49)	0.002	0.17 (− 0.24–0.57)	0.419
Masseter muscle palpation pain	− 2.23 (− 4.57–0.12)	0.063	1.92 (−4.37–0.53)	0.125	−0.41 (− 1.20–0.37)	0.302	0.03 (− 0.36–0.43)	0.864
Temporal muscle palpation pain	− 5.82 (− 9.58–2.06)	0.002	− 5.12 (− 8.99 – − 1.24)	0.010	−1.81 (− 3.10 – − 0.52)	0.006	0.34 (− 0.29–0.96)	0.288
Limited condylar sliding	−9.38 (− 12.50 – − 6.27)	0.000	−9.70 (− 12.90 – -6.50)	0.000	− 2.27 (− 3.38 – -1.16)	0.000	1.86 (1.36–2.37)	0.000
Orthodontic treatment	− 0.57 (− 2.41–1.27)	0.545	0.34 (−2.28–1.59)	0.727	−0.27 (− 0.88–0.34)	0.389	0.24 (− 0.07–0.55)	0.128

AMIO active maximum interincisal opening; CI confidence interval; JIA juvenile idiopathic arthritis; PMIO passive maximum interincisal opening; TMJ temporomandibular joint
The adjusted model with corrections for length and gender showed the association of each variable to AMIO, PMIO, protrusion, and discrepancy in laterotrusion
*Discrepancy in laterotrusion was defined as the difference between left and right laterotrusion with correction for midline deviation. TMJ involvement is proposed as a TMJ protocol score ≥ 2 in JIA patients [5]
**Deviation AMIO and protrusion were defined as mandibular midline deviation during AMIO and mandibular midline deviation during protrusion

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ISSN: 1546-0096

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