Effect of occlusal interference on condylar position and trajectory of movement: a randomized crossover-controlled trial
Abstract Objective The occlusal interferences may alter the position of the condyles in the articular fossa and trigger abnormal mandibular movements, but the specific effects on condylar position and movement trajectory are currently unknown. The present study was designed as a randomized crossover...
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BMC
2025-04-01
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| Series: | BMC Oral Health |
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| Online Access: | https://doi.org/10.1186/s12903-025-05917-3 |
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| author | Miao Wei Yu Xie Bingbing Lv Wenzhi Niu |
| author_facet | Miao Wei Yu Xie Bingbing Lv Wenzhi Niu |
| author_sort | Miao Wei |
| collection | DOAJ |
| description | Abstract Objective The occlusal interferences may alter the position of the condyles in the articular fossa and trigger abnormal mandibular movements, but the specific effects on condylar position and movement trajectory are currently unknown. The present study was designed as a randomized crossover-controlled trial to investigate the direct effects of distinguished types of occlusal interference on condylar position and movement trajectory. Methods 14 volunteers with healthy dentition were recruited. Each of them underwent four occlusal interference conditions: mediotrusive occlusal interference (MOI), laterotrusive occlusal interference (LOI), dummy occlusal interference (DOI), and free of interference. The sequence of interferences was randomized. Mandibular movements were recorded and measured by using jaw motion analysis system, during which the condylar trajectory and functional parameters, including sagittal condylar inclination (SCI) and Bennett Angle (BA) were analyzed to assess the condylar motion status. Furthermore, a descriptive analysis of condylar positional trends was conducted to measure the relative three-dimensional position of the condyle. Results Affected by MOI, the condylar axis turned towards the anterior and superior directions. BA values exhibited a significant increase on the interference side and a decrease on the other side, accompanied by a reduction in SCI on the interference side. LOI caused a larger mandibular deviation angle towards the interference side, resulting in a notable increase in BA. The differences were all statistically significant (P<0.05). Conclusion Occlusal interferences can alter the condylar position and movement trajectory during the mandibular movement in laterotrusion and protrusion. Different occlusal interferences have different influences, manifested in the varying values of condylar guidance inclination. Trial registration The study was registered at the Chinese Clinical Trial Registry on 01/05/2024 (Identification number: ChiCTR2400084150). |
| format | Article |
| id | doaj-art-159536d2dfb44bc491a60756f04928fe |
| institution | DOAJ |
| issn | 1472-6831 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | BMC |
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| series | BMC Oral Health |
| spelling | doaj-art-159536d2dfb44bc491a60756f04928fe2025-08-20T03:10:16ZengBMCBMC Oral Health1472-68312025-04-0125111010.1186/s12903-025-05917-3Effect of occlusal interference on condylar position and trajectory of movement: a randomized crossover-controlled trialMiao Wei0Yu Xie1Bingbing Lv2Wenzhi Niu3School of Stomatology, Xuzhou Medical UniversityDepartment of Implant Dentistry, Affiliated Stomatological Hospital of Xuzhou Medical UniversitySchool of Stomatology, Xuzhou Medical UniversitySchool of Stomatology, Xuzhou Medical UniversityAbstract Objective The occlusal interferences may alter the position of the condyles in the articular fossa and trigger abnormal mandibular movements, but the specific effects on condylar position and movement trajectory are currently unknown. The present study was designed as a randomized crossover-controlled trial to investigate the direct effects of distinguished types of occlusal interference on condylar position and movement trajectory. Methods 14 volunteers with healthy dentition were recruited. Each of them underwent four occlusal interference conditions: mediotrusive occlusal interference (MOI), laterotrusive occlusal interference (LOI), dummy occlusal interference (DOI), and free of interference. The sequence of interferences was randomized. Mandibular movements were recorded and measured by using jaw motion analysis system, during which the condylar trajectory and functional parameters, including sagittal condylar inclination (SCI) and Bennett Angle (BA) were analyzed to assess the condylar motion status. Furthermore, a descriptive analysis of condylar positional trends was conducted to measure the relative three-dimensional position of the condyle. Results Affected by MOI, the condylar axis turned towards the anterior and superior directions. BA values exhibited a significant increase on the interference side and a decrease on the other side, accompanied by a reduction in SCI on the interference side. LOI caused a larger mandibular deviation angle towards the interference side, resulting in a notable increase in BA. The differences were all statistically significant (P<0.05). Conclusion Occlusal interferences can alter the condylar position and movement trajectory during the mandibular movement in laterotrusion and protrusion. Different occlusal interferences have different influences, manifested in the varying values of condylar guidance inclination. Trial registration The study was registered at the Chinese Clinical Trial Registry on 01/05/2024 (Identification number: ChiCTR2400084150).https://doi.org/10.1186/s12903-025-05917-3Temporomandibular disordersOcclusal interferenceMovement trajectoryCondylar positionSagittal condylar guidanceBennett angle |
| spellingShingle | Miao Wei Yu Xie Bingbing Lv Wenzhi Niu Effect of occlusal interference on condylar position and trajectory of movement: a randomized crossover-controlled trial BMC Oral Health Temporomandibular disorders Occlusal interference Movement trajectory Condylar position Sagittal condylar guidance Bennett angle |
| title | Effect of occlusal interference on condylar position and trajectory of movement: a randomized crossover-controlled trial |
| title_full | Effect of occlusal interference on condylar position and trajectory of movement: a randomized crossover-controlled trial |
| title_fullStr | Effect of occlusal interference on condylar position and trajectory of movement: a randomized crossover-controlled trial |
| title_full_unstemmed | Effect of occlusal interference on condylar position and trajectory of movement: a randomized crossover-controlled trial |
| title_short | Effect of occlusal interference on condylar position and trajectory of movement: a randomized crossover-controlled trial |
| title_sort | effect of occlusal interference on condylar position and trajectory of movement a randomized crossover controlled trial |
| topic | Temporomandibular disorders Occlusal interference Movement trajectory Condylar position Sagittal condylar guidance Bennett angle |
| url | https://doi.org/10.1186/s12903-025-05917-3 |
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