Distortion of the jaws during biting

Picton, D.C.A.

doi:10.1016/0003-9969(62)90063-8

Cited by 35 publications

(22 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 1962, Picton observed distortion in the mandible and maxillae during biting. Measurements were made between adjacent molars while a biting force was applied on the contralateral side . Tooth movement was observed in the mandible of all patients in the absence of direct force to the teeth.…”

Section: Mandibular Distortionmentioning

confidence: 99%

Biomechanics and functional distortion of the human mandible

Choi

Conway

Taraschi

et al. 2014

J of Invest & Clin Dent

View full text Add to dashboard Cite

The reaction to the use of finite element analysis (FEA) in the study of the human body has been particularly enthusiastic. Of equal and challenging complexity is the investigation of load/stress distribution and morphological distortion of the human mandible under functional loads. Furthermore, the mandible also impacts directly on body function and esthetics, playing a vital role, such as mastication and speech. The application of FEA to the biomechanical investigation of the oral systems, such as human teeth and mandibular bone remodeling, began in the early 1970s. The clinical significance of jaw deformation is unknown. The primary concern is that deformation might result in an ill-fitting superstructure or the creation of harmful strains in the patient-implant complex. Although mandibular implant treatment has a high success rate, the possibility of failure caused by these dimensional changes and the related micromotion cannot be ignored.

show abstract

Section: Mandibular Distortionmentioning

confidence: 99%

Biomechanics and functional distortion of the human mandible

Choi

Conway

Taraschi

et al. 2014

J of Invest & Clin Dent

View full text Add to dashboard Cite

show abstract

“…Clenching between premolar and molar teeth on the working side seems to increase the dental arch width at more posterior tooth locations (Koeck and Sander, 1978), and induce tooth movement on the balancing side (Picton, 1962), both of which are thought to be caused byjaw deformation due to muscle activity. Also, the inclusion of a balancing-side contact during a workingside molar clench apparently narrows the arch between the second molars (Koeck and Sander, 1978).…”

Section: Introductionmentioning

confidence: 99%

Deformation of the Human Mandible During Simulated Tooth Clenching

1994

View full text Add to dashboard Cite

Localized corpus and dental arch distortions measured directly on human and animal mandibles suggest complex deformation patterns at other mandibular sites during functional loading. To describe these, we simulated selected static bites on a three-dimensional finite element computer model of the human jaw. Five clenching tasks were modeled: intercuspal position, left group function, left group function plus balancing contact, incisal clenching, and right molar clenching. Under conditions of static equilibrium and within the limitations of the current modeling approach, the human jaw deforms elastically during symmetrical and asymmetrical clenching tasks. This deformation is complex, and includes the rotational distortion of the corpora around their axes. In addition, the jaw also deforms parasagittally and transversely. The degree of distortion depended on each clenching task, with actual deformations being relatively small and ranging from 0.46 mm to 1.06 mm for the tasks modeled when all sites were taken into account. The predicted overall narrowing of the dental arch is consistent with clinical reports in the literature during similar, although not identical, static jaw function. The predicted regional deformations of the upper condylar surfaces imply differential loading at their upper surfaces. Although still constrained to forceful static biting conditions, the simulated mandibular and dental arch distortions should be taken into consideration in the design and testing of prosthetic devices in the lower jaw.

show abstract

“…Most other workers who have found spontaneously discharging units have worked on mandibular teeth and have therefore needed to fix the mandible in some way. It has been shown that forces on one part of the jaw can cause deformation at some distance from the site of the force (Picton, 1962) and it is possible that fixing the mandible might subject low-threshold slowly adapting mechanoreceptors to low-grade mechanical stimulation. It is our impression that when we fixed the mandible to the maxilla we recorded more spontaneous activity.…”

Section: Discussionmentioning

confidence: 99%

Effects of sympathetic nerve stimulation on intra‐oral mechanoreceptor activity in the cat

Cash

1982

The Journal of Physiology

View full text Add to dashboard Cite

SUMMARY1. Micro-electrode recordings were made from intra-oral mechanoreceptor neurones in the trigeminal ganglion and mesencephalic nucleus of the fifth nerve in the cat.2. The effect of cervical sympathetic trunk stimulation on the discharge of the mechanoreceptors to a controlled force was observed.3. Almost half of the mechanoreceptor neurones studied were modulated by sympathetic stimulation. Sympathetic stimulation both decreased the impulse frequency to a controlled force application and raised the threshold in these receptors. The remainder were unaffected by sympathetic stimulation.4. In previous studies involving recordings from either the trigeminal ganglion or mesencephalic nucleus no spontaneously active slowly adapting intra-oral mechanoreceptors have been observed, yet in peripheral alveolar nerve studies many workers have reported spontaneously discharging neurones. In the present study spontaneous activity has been recorded from intra-oral mechanoreceptors both in the trigeminal ganglion and in the mesencephalic nucleus after cutting the cervical sympathetic trunk. The spontaneous activity could be abolished in all cases but one, by sympathetic stimulation. It is suggested that reported spontaneous activity from intra-oral mechanoreceptors could be due to cutting the peripheral nerve and therefore the sympathetic supply, thus removing an inhibitory influence from the sensory unit. The means by which the sympathetic supply inhibits the sensory unit has not been resolved.

show abstract

Distortion of the jaws during biting

Cited by 35 publications

References 6 publications

Biomechanics and functional distortion of the human mandible

Biomechanics and functional distortion of the human mandible

Deformation of the Human Mandible During Simulated Tooth Clenching

Effects of sympathetic nerve stimulation on intra‐oral mechanoreceptor activity in the cat

Contact Info

Product

Resources

About