Effect of disc morphological features and disc-condyle angles on conservative treatment for anterior disc displacement with reduction

doi:10.7518/hxkq.2025.2024313

Abstract

Abstract:

Objective This study aimed to evaluate the effect of disc morphology and disc-condyle angle on the treatment of anterior repositioning splint (ARS) for anterior disc displacement with reduction (ADDwR). Methods On the basis of the inclusion and exclusion criteria, a total of 11 patients diagnosed with ADDwR were included. The effects of changes in disc length, thickness, and morphology classifications on the clinical symptoms, disc morphology parameters, and disc-condyle angles after ARS treatment were evaluated using magnetic resonance imaging and the Helkimo index. Results After ARS treatment, the Ai and Di of all patients with ADDwR decreased, the disc length increased, and the thickness decreased. The Ai of patients with slight ADDwR and those with type 1 joint discs was reduced to 0, with the most significant decrease observed in Di. The disc length of mild ADDwR (increased to 8.65 mm±1.79 mm) and type 5 disc (increased to 10.71 mm±2.62 mm) significantly increased the most. The disc thickness of slight ADDwR decreased to 3.08 mm±0.51 mm significantly. Conclusion The therapeutic effect of ARS is correlated with the displacement degree and morphological features of the disc, providing evidence for clinical treatment decisions.

Key words: anterior repositioning splint, anterior disc displacement with reduction, disc, magnetic resonance imaging, therapeutic effect

CLC Number:

R782.6

Song Jialu, Xiao Qiqin, Cen Xiao. Effect of disc morphological features and disc-condyle angles on conservative treatment for anterior disc displacement with reduction[J]. West China Journal of Stomatology, 2025, 43(3): 406-415.

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前移位程度	治疗前/mm	治疗后/mm	P值
轻微	10.37±1.77	10.72±1.01	0.431
轻度	7.00±2.05	8.65±1.79	0.115
中度	7.17±2.02	9.01±3.80	0.376
总体	8.24±2.44	9.50±2.56	0.094

前移位程度	治疗前/mm	治疗后/mm	P值
轻微	3.42±0.96	3.08±0.51	0.308
轻度	2.27±1.30	2.25±1.28	0.958
中度	2.87±0.55	2.83±0.69	0.422
总体	2.95±1.01	2.74±0.89	0.212

形态	治疗前/mm	治疗后/mm	P值
1	10.17±1.89	10.42±1.19	0.579
2	7.42±3.31	7.86±0.97	0.859
4	7.88±2.16	7.93±3.44	0.969
5	7.03±2.05	10.71±2.62	0.067

形态	治疗前/mm	治疗后/mm	P值
1	3.15±0.99	3.01±0.66	0.641
2	1.43±0.99	1.51±0.83	0.563
4	3.18±0.77	2.67±0.83	0.325
5	3.10±0.83	3.15±0.73	0.583

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