Influence of Alteration of Tooth Contact on Mandibular Displacement during Lateral Clenching.

Baba, Kazuyoshi; Yugami, Kei; Yaka, Tomohiko; Akishige, Satoshi; Haketa, Tadasu; Ai, Minoru

doi:10.2186/jjps.43.328

Cited by 1 publication

(5 citation statements)

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“…Possible explanation for this result may be that the balancing contact acted in a supporting fashion for its unilateral counterparts. This finding is in agreement with those by Baba et al . (1999), and supports the study by Minagi et al .…”

Section: Discussionsupporting

confidence: 94%

“…Consequently, GF yielded the largest elevation of the non‐working side condyle and CP the smallest. On the other hand, Baba et al . (1999) predicted that a significant elevation of the non‐working side condyle occurs when canine protected occlusion was simulated.…”

Section: Discussionmentioning

confidence: 98%

“…Another advantage was that the occlusal vertical dimension in the lateral mandibular position was not altered for the simulation of various occlusal patterns. This latter aspect is crucial, because when clenching is performed on a device that increases the occlusal vertical dimension it has the potential to decrease the interocclusal distance at the site of the device (Takeuchi, Fujimura & Bando, 1990) and to increase the amount of mandibular displacements (Baba et al ., 1999).…”

Section: Discussionmentioning

confidence: 99%

“…Intra‐articular pressure measurement is one of the direct methods used, which was performed on both animal (Hohl & Tucek, 1982; Nickel & McLachlan, 1994) and human subjects (Nitzan, 1994). The indirect method involves finite element analysis (Smith, McLachlan & McCall, 1986; Korioth & Hannam, 1994a,>b), measurements of TMJ space with the aid of tomograms (Kuboki et al ., 1996) and measurements of minute condylar displacement with the aid of a jaw tracking system (Ito et al ., 1986; Arai & Kohno, 1997; Minagi et al ., 1997; Baba et al ., 1999). For both ethical and practical reasons, the current study used jaw tracking systems with the six degrees of freedom in order to predict minute condylar displacements.…”

Section: Discussionmentioning

confidence: 99%

“…As for lateral clenching, it was also suggested that the contralateral TMJ suffers similar or larger compressive loads. Baba et al . (1999) further reported that the controlled submaximal clenching on a unilateral canine causes jaw tipping, which is suggestive of non‐working side TMJ compression, while an introduction of simultaneous balancing contact (simulated full balanced occlusion) prevents this tipping.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The influence of altered occlusal guidance on condylar displacement

Okano

Baba

Akishige

et al. 2002

J of Oral Rehabilitation

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This study investigated mandibular displacement and masticatory muscle activity during clenching in lateral occlusal position in relation to the lateral occlusal pattern. Twenty healthy human subjects (mean = 26.5 years) volunteered for this study. Metallic occlusal overlays were fabricated for the lower working side canine to second molar and non-working side second molar in order to simulate a canine protected occlusion, group function occlusion and bilateral balanced occlusion (balancing contact). Three-dimensional displacements of the bilateral condyle and electromyography (EMG) activities in the bilateral masseter, anterior and posterior temporalis were recorded during maximal clenching. The experimental occlusal pattern was revealed to have statistically significant effects on both condylar displacement and EMG activity (P < 0.001 and P < 0.001, respectively). When compared to the simulated group function occlusion, the simulated canine protected occlusion and balancing contact caused statistically significant smaller superior displacements of the non-working side condyle, which suggests that they may result in reduced temporomandibular joint (TMJ) loading. Furthermore, the simulated canine protected occlusion was associated with the lowest EMG activity, which suggests that this occlusal pattern has the capacity to reduce the level of parafunctional activity.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 98%