Experimental mechanics study of the temporomandibular joint loading affected by decreasing interarch distance

doi:10.3877/cma.j.issn.1674-1366.2014.05.006

Chinese Journal of Stomatological Research(Electronic Edition) ›› 2014, Vol. 8 ›› Issue (05): 382-385. doi: 10.3877/cma.j.issn.1674-1366.2014.05.006

• Original Articles • Previous Articles

Experimental mechanics study of the temporomandibular joint loading affected by decreasing interarch distance

Zheng Chen¹, Zhihui Mai¹, Lin Chen¹, Qi Chen¹, Yuxuan Wang¹, Hong Ai¹^,^†()

1.Department of Stomatology， The Third Affiliated Hospital of Sun Yat-sen University， Guangzhou 510630， China

Received:2014-04-25 Online:2014-10-01 Published:2025-02-19
Contact: Hong Ai

Abstract

Abstract:

Objective

To analyze the temporomandibular joint （TMJ） loading affected by the decreasing interarch distance with occlusal attrition.

Methods

With the model reconstructed in preliminary study， record and analyze the loading distribution of TMJ when the interarch distance was decrease.

Results

（1）In the different interarch distance， the stress center of TMJ shifted to lower interface of the right side， and the most pressed area of the articular surfaces was displacement inordinately. （2）As the interarch distance decreased， all the interface peak pressure of TMJ increased （P＜0.05）， and the interface peak pressure in lower compartment of TMJ is greater than the upper （P＜0.05）. （3）As the interarch distance decreased， the contact area of the TMJ have no significant different.

Conclusions

When the the interarch distance decreased because of the the dental attrition， the occlusion relationship would be changed， which caused the joint structure had a relative displacement and the change of its internal stress environment. All could eventually cause the biomechanical reconstruction.

Key words: Temporomandibular joint loading, Interarch distance, Experimental mechanics

Zheng Chen, Zhihui Mai, Lin Chen, Qi Chen, Yuxuan Wang, Hong Ai. Experimental mechanics study of the temporomandibular joint loading affected by decreasing interarch distance[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2014, 8(05): 382-385.

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Figures/Tables 5

References 9

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TMJ部位	工况一	工况二	工况三	P值
				ANOVA	LSD
				ANOVA	工况一vs工况二	工况一vs工况三	工况二vs工况三
左上腔	32.30±5.80	45.63±7.71	59.20±8.79	0.00^a	0.00^a	0.00^a	0.03^b
左下腔	59.50±11.30	71.53±10.78	87.50±15.68	0.00^a	0.01^a	0.00^a	0.01^b
右上腔	66.30±6.31	88.13±12.62	109.97±15.55	0.00^a	0.00^a	0.00^a	0.00^a
右下腔	73.40±5.05	93.33±11.30	119.37±14.41	0.00^a	0.00^a	0.00^a	0.00^a

TMJ部位	工况一	工况二	工况三	P值
				ANOVA	LSD
				ANOVA	工况一vs工况二	工况一vs工况三	工况二vs工况三
左上腔	32.30±5.80	45.63±7.71	59.20±8.79	0.00^a	0.00^a	0.00^a	0.03^b
左下腔	59.50±11.30	71.53±10.78	87.50±15.68	0.00^a	0.01^a	0.00^a	0.01^b
右上腔	66.30±6.31	88.13±12.62	109.97±15.55	0.00^a	0.00^a	0.00^a	0.00^a
右下腔	73.40±5.05	93.33±11.30	119.37±14.41	0.00^a	0.00^a	0.00^a	0.00^a

TMJ部位	工况一	工况二	工况三	F值	P值
左上腔	1.32±0.07	1.31±0.11	1.30±0.10	0.052	0.95
左下腔	1.16±0.92	1.14±0.11	1.13±0.10	0.122	0.89
右上腔	1.29±0.16	1.36±0.06	1.31±0.10	0.312	0.74
右下腔	1.31±0.11	1.32±0.19	1.30±0.21	0.097	0.91

TMJ部位	工况一	工况二	工况三	F值	P值
左上腔	1.32±0.07	1.31±0.11	1.30±0.10	0.052	0.95
左下腔	1.16±0.92	1.14±0.11	1.13±0.10	0.122	0.89
右上腔	1.29±0.16	1.36±0.06	1.31±0.10	0.312	0.74
右下腔	1.31±0.11	1.32±0.19	1.30±0.21	0.097	0.91

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