Occlusal analysis of patients with chewing side preference and symptoms of temporomandibular disorders

doi:10.7518/hxkq.2022.04.014

Abstract

Abstract:

Objective In this study, TeeTester digital occlusal analysis system was used to analyse the occlusal characteristics of chewing side preference (CSP) and non-CSP patients with TMD symptoms. Methods According to the questionnaire and oral examination, 80 subjects were screened and divided into four groups: 20 CSP patients with TMD symptoms, 20 CSP patients without TMD symptoms, 20 non-CSP patients with TMD symptoms, 20 non-CSP patients without TMD symptoms. TeeTester digital occlusal system was applied to measure the occlusal characteristics in all four groups, including total contect area (TCA), total occlution force (TOF), distribution of occlusal force (DOF), asymmetric index of occlusal force (AOF), occlusal time (OT), disclusion time (DT) and center of occlusal force(COF). SPSS 25.0 was used to analyze the statistical data. Results At intercuspal position, the data reveals significant differences in the maximum TOF and TCA among the four groups (P<0.05). There was significant difference in the distribution of occlusal force between the preferred side and the other side of CSP patients with or without TMD symptoms (P<0.05). Among the four groups, there were statistically significant difference in the position of the center point of occlusal force, the direction of the center point of occlusal force, and the vertical distance between the center point of occlusal force and the center line (P<0.05). The COF, maximum TOF and TCA of the preferred side of dentition were significantly positive correla⁃ted with CSP (P<0.05), according to Spearman correlation analysis. However, the maximum TOF and TCA of the both side of dentition were significantly negative correlated with TMD symptoms (P<0.05). Conclusion 1) The occlusal characteristics of CSP patients and non-CSP patients with TMD symptoms are different. TeeTester digital occlusal analysis system provides objective parameters for the dynamic evaluation of occlusion. 2) Among all the occlusal cha⁃racteristics, maximum TOF, TCA and COF of the preferred side of dentition were positively correlated with CSP. The abnormal occlusal characteristics (maximum TOF and TCA of the whole dentition) caused by CSP are related to TMD symptoms.

Key words: chewing side preference, digital occlusal analysis system, temporomandibular disorders, occlusion

CLC Number:

R 782.6

Zhang Qiao, Huang Dongzong, Zhai Xiaoting, Li Hongbo, Hu Min, Liu Hongchen, Jiang Hua. Occlusal analysis of patients with chewing side preference and symptoms of temporomandibular disorders[J]. West China Journal of Stomatology, 2022, 40(4): 457-467.

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组别	性别		年龄/岁
组别	男	女	年龄/岁
不伴TMD症状的非CSP	16	4	23.9±4.5
不伴TMD症状的CSP	14	6	25.9±5.7
伴TMD症状的 CSP	6	14	26.9±6.0
伴TMD症状的非CSP	6	14	27.3±6.3

组别	TOF/kg	TCA/mm²	咬合力
组别	TOF/kg	TCA/mm²	习惯侧咬合力/%	非习惯侧咬合力/%	t值	P值
不伴TMD症状的非CSP	107.1±14.5	497.5±41.0	50±7.1	50±7.1	0	>0.05
不伴TMD症状的CSP	70.9±5.8	398.7±21.8	65.1±10.6	34.9±10.6	8.96	<0.01
伴TMD症状的CSP	67.1±8.2	382.3±31.8	58.8±12.7	41.2±12.7	4.42	<0.01
伴TMD症状的非CSP	61.7±7.4	335.9±26.3	51.0±10.8	49.0±10.8	0.59	>0.05
F值	4.65	4.79
P值	0.005	0.004

组别	AOF/%	OT/s	DT/s
不伴TMD症状的非CSP	10.6±9.1	0.20±0.03	0.14±0.03
不伴TMD症状的CSP	33.1±15.9	0.32±0.08	0.15±0.04
伴TMD症状的CSP	24.5±18.5	0.27±0.05	0.19±0.04
伴TMD症状的非CSP	15.0±15.3	0.35±0.05	0.16±0.03
F值	8.87	1.30	0.44
P值	<0.01	>0.05	>0.05

组别	COF位置		COF距中线垂直距离/mm	COF偏移方向
组别	灰圈内	灰圈外	COF距中线垂直距离/mm	左侧	右侧	中线
不伴TMD症状的非CSP	18	2	4.49±0.82	5	10	5
不伴TMD症状的CSP	9	11	10.98±1.18	8	12	0
伴TMD症状的CSP	8	12	7.47±0.99	8	12	0
伴TMD症状的非CSP	15	5	5.53±0.94	5	8	7
χ²/F值	14.72（χ²值）		8.29（F值）	15.10（χ²值）
P值	<0.01		<0.01	<0.05

组别	TOF/kg	TCA/mm²	AOF/%	OT/s	DT/s
不伴TMD症状的非CSP	56.1±8.3	325.1±29.7	18.2±14.0	0.55±0.22	0.61±0.13
不伴TMD症状的CSP	38.3±8.3	258.6±33.5	25.9±18.6	0.51±0.09	0.64±0.18
伴TMD症状的CSP	42.5±5.1	281.4±24.3	25.8±18.6	0.86±0.36	1.26±0.37
伴TMD症状的非CSP	44.6±7.9	256.9±30.9	22.2±16.5	0.63±0.13	1.37±0.53
F值	1.03	1.13	0.93	0.490	1.37
P值	0.387	0.340	0.432	0.691	0.26