Evidence map›Paper›PMID 41896815›Full record

ArticleBMC oral health2026

Quantitative analysis of changes in the three-dimensional position of the condyle in the intercuspal position and the myocentric position before and after transcutaneous electrical nerve stimulation.

Xiangting Zhang, Xingyu Wang, Mengyao Li, Ya Gao, Hao Liu, Haiwei Jin, Jiaming Zhao

Abstract read
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Article in BMC oral health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

7 authors.

Xiangting ZhangStomatology School of Dalian Medical University, Dalian, Liaoning Province, China.
Xingyu WangStomatological Hospital of Dalian University (Dalian Stomatological Hospital), Dalian, Liaoning Province, China.
Mengyao LiStomatology School of Dalian Medical University, Dalian, Liaoning Province, China.
Ya GaoStomatology School of Dalian Medical University, Dalian, Liaoning Province, China.
Hao LiuStomatology School of Dalian Medical University, Dalian, Liaoning Province, China.
Haiwei JinStomatology School of Dalian Medical University, Dalian, Liaoning Province, China. haiwei.jin@dmu.edu.cn.
Jiaming ZhaoStomatological Hospital of Dalian University (Dalian Stomatological Hospital), Dalian, Liaoning Province, China. dlkq_zhaojiaming@126.com.

Funding

the Dalian Life and Health Field Guidance Plan Project 2024ZDJH01PT173the Dalian Life and Health Field Guidance Plan Project No. 2024ZDJH01PT173
6 · The paper itself

Abstract

backgroundAlthough the concept of myocentric position (MCP), proposed by neuromuscular dentistry (NMD), remains controversial in clinical practice, its precise location and the corresponding changes in the condylar space have not been fully quantified. This study aims to objectively analyze the spatial relationship between the intercuspal position (ICP) to MCP, and to quantify condylar displacement and movement patterns via three-dimensional measurements.

methodsThirty voluntary participants with normal dentition were recruited, mean age 24.93 ± 2.27 years. Baseline data of resting jaw position were collected and cone-beam computed tomography (CBCT) was taken at ICP. After 45 min of transcutaneous electrical nerve stimulation (TENS), resting jaw position were recorded again and CBCT was taken after recording MCP using silicone registration material. Model of the condyle above the mandibular sigmoid notch intercepted after three-dimensional reconstruction of CBCT data. The three-dimensional positional changes of the condyle during ICP-MCP were quantified by calculating the computer-generated changes in the center of gravity of the condyle, and assess the movement pattern of the condyle by measuring the angles on the surface of the condyle model.

resultsFollowing TENS intervention, the freeway space significantly increased in 30 subjects (1.70 ± 0.65 mm vs. 1.12 ± 0.51 mm, P < 0.001), confirming that TENS effectively guides the masticatory muscles to a physiological resting position (PRP) with lower muscle tension. The MCP is located on average 0.78 mm below and 0.60 mm anterior to the ICP. A small range of movement and rotation of the condyle occurred bilaterally from the ICP to the MCP. The average downward displacement was 0.61 mm, forward displacement was 0.83 mm, and outward displacement was 0.09 mm. The average change in the downward angle was 0.45° downward, forward angle was 0.20°, and outward angle was 0.20°. This displacement belongs within the physiological range of the condylar process.

conclusionThis study describes the three-dimensional spatial characteristics of MCP and condylar position induced by TENS in individuals with normal occlusion. It provides methodological and quantitative reference data for the measurement of condylar displacement and supports further evidence-based investigations of MCP-related concepts.

Indexed as

Mandibular CondyleTranscutaneous Electric Nerve StimulationAdultCone-Beam Computed TomographyFemaleHumansImaging, Three-DimensionalMaleMotion CaptureYoung AdultCone-beam computed tomographyElectroacupunctureJaw relation recordMandibular condyleNeuromuscular junction

Identifiers

PMID41896815
PMCPMC13147691

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LicenceCC BY-NC-ND
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