Application of Mandibular movement in denture construction

Mandibular movements can be broken down to both functional and non-functional. The most effective motions performed by the mandibular muscles are practical or chewing motions against centric oclusion. As seen in the condylar region, this step is a mixture from both rotation and translation and is performed mainly by masseter pterygoid muscles, both temporal and internal. Often called mandibular glides were nonfunctional motions, which were happily associated with chewing motion. These are governed by the bent back teeth plates, the lingual surfaces of the anterior upper teeth and the orientation of the condyles. During an adulthood, the course of the glide is determined by the position of the condylar and what is ever interposed between the top and the lower ridges. The nonfunctional motions are usually referred to as lateral and protrusive right and left. As a corollary, many authors misused the terms working and equilibrating sides of the right or left side of the movement. For the mandible in a chewing stroke, this idealized position does not assume an actual working occlusion as shown in most textbooks on this topic. The nonfunktions are intrinsically translatoric and motivated primarily by the outer pterygoid muscle, as viewed in the condylar area[1]. The integration of dentures is the high point of all clinical dentures and awaits both the patient and the clinician with great interest. But a number of adaptive difficulties may arise after tooth insertion. Transitional issues, including chewing difficulty, jaw weakness, excessive discharge of salivary and phonetic issues, are normal even though the denture is well built and developed. Occlusal dentures, the incorrect vertical dimension and occlusion, or incorrect contours of denture base, are the main reasons of dental pain related with denture-bearing tissues and denture retention or stability defects. These factors will reduce the comfort and happiness of the patient and affect everyday wear of the whole denture[2].

One scientist found that these initial complications are related to tongue alterations in relation to oral mucosa, volume constraints for the mouth, loads transferred to the supporting tissues, improvements in muscle proprioceptive impulses, and alterations in longitudinal facial and mandibular rest levels[3].

The patients gain a neuromuscular control after this transition period, compensating for possible deficiencies in their prothesis and maintaining stable stability and relaxation in a longer period.

In the 70's, Jankelson et al. introduced the kinesiograph as a diagnostic and clinical research tool in dentistry, rather than the newest study of dynamic mandibular movement. While few trials have been performed for full dental patients, this instrument was commonly used to track denture individuals[4]. Tallgren et al . noted that abnormal activity was carried out in patients without post-dental assistance, with immediate maxillary dentures implanted as a result of restored functional occlusion in conjunction with mandibular temporary partial dentures, and enhanced mandibular patterns substantially. However, a two-year retrospective study revealed a substantially diminished range of expression, possibly because the denture durability was slowly decreased[5].

 

 

Discussion

In its physiological rest position the tonus of the muscles attached to the mandible. When the jaw is in movement, its attached muscles are caused by the contraction and relaxation. This strength is called a muscular effort. In his orthodoxy mechanics book, Prof. R. S. Swinton of the University of Michigan traduced, Winkler divides forces into active and passive forces: "Forces which cause movement are called active forces and always accompanied by resistance or reactions, which can be called passive forces." If, due to the resistance of food bolus, the mandible stops going towards a centric connection or when there is no food, and the occlusal surfaces of the teeth come into contact with each other, a balance is formed. In the point the static forces of the maxilla are the same as those of the muscles attached to the mandible as the skull is connected to the spine by its skin.

The active force of the mandible can IK in direction and meaning. An~t size, but the resultant influence of all mandibular musculature is in fact what we are graphing. 'Because it is an ignorance to the resulting effect whether or not force is applied at the top of the chain, or hanging below, and wherever the point of application can be on the line of action of the Force, it is necessary to know the line of action, not the point of application.' 'The normal jaw point followed by the two lower central incisors is the incisor point or the touch point. For example, when performing a gothic arch tracing, this point can be graphically traced or a symbol can be rigidly placed between the two lower central incisors and photographed within the interproximal area. This motions are the product of all muscular force responsible for the guided mandibular movement and will be explored as a forward view (frontal), a side view (sagittal) or a top view (horizontal) in its reflection on the three planes of space [6].

"The path of a moving object is the entire path of its component particles, as described as this. Translation: The motion is mere translation because these paths are all of the same type. A body will rotate as the components in the body define focus circles on a specific axis. "Anyone who has a body should be able to rotate. that can be out of the body. .'.. or '.' "Translation and rotation can occur at the same time. Axis may move through." The description fits perfectly with that used by Dr. Harry Sicher when he defines a tempo mandibular joints as a "shaft joint on a moveable socket." Thus, the outcomes for functional movements are synonymous with spinning and interpreter movement. The rotational center is the rotation of the body in every moment, which is a straight or curved direction. Movements. Motions. Such variations are studying under dynamics, which are described as "the awareness of motion and the forces acting on the masse of the body." Furthermore, we need to understand the "science of similar or balanced forces." Effects of functional and non-functional and inert action while the active mandible forces are equivalent to the effects of the maxilla 's passive force; viz. Centric occlusion is achieved.

 

The position of the active resultant forces of the mandible are usually shown and extended to the occlusal or incisal surfaces at right angles. Image. 6 This physical phenomenon is demonstrated for the forehead and the rear teeth in the sagittal plane. These lines are directly perpendicular to the inclined planes of the occlusal surfaces until they dissipate the active force. It can be seen that the stabilization of the dentures is attributable to the placing of the occlusal surfaces; the force used at one point of a denture over the whole dental base is referred [7].

A balanced occlusion, a right vertical dimension and a proper base extension are correlated with fulfillment of operation and comfort. Regardless of general health and psychological features, denture quality is good predictors of treatment success and other favorable local aspects. Nonetheless, there are multi-dimensional aspects and implications to functional adjustment for dentures which affect patient satisfaction. Patients need to realize that a new muscle activity will evolve after the dentures have been implanted to regulate practical behaviors. Close to 60% of denture users perform satisfactorily within a week and about 20% within one month[8].

Patients' subjective denture assessment, chewing capacity, chewing rhythm and muscle control, chewing constancy period and occlusal sensation, are the functional parameters to be considered after insertion of dentures. Previous studies show that after the post-insertion phase all these parameters improved considerably because the patients developed a compensatory neuromuscular adjustment. These causes, however, do not contribute to the synchronization of the mandibular or the expansion of the jaws. The willingness of patients to cope with challenges, the ability to learn and the constant improvement of functional activities are more explicit[9].

Periodontal and temporomandibular joint receptors play an important role in regulating both the occlusal forces and jaws. Though periodontal proprioception does not exist, the chewing processes remain unchanged as in the edentulous patient, since chewing is regulated by a central neural processor, which modulates the rhythmic activity[10].

The study reveals that dentures are inserted in a nonfunctional movement without altering the pattern, speed and limitations. For comparison, following application of the immediate maxillary and the reversible mandibular extension dentures, Tallgren et al. observed improvement in chewing and range of movement. The preservation of the dentures will affect this change.

The improvement in occlusion is also a factor that affects tolerance to new dentures. Research in dentates shows that changes in occlusal guidance substantially change the lateral border movement. However, if complaints are not detected and overall comfort, esthetic satisfaction, and functional improvement are achieved, there is no conclusion on the clinical significance of these changes[11].

The vertical proportions are the most important changes. The consequences are variations in denture and edentulous patients in the muscle activity, in the rest position of the mandible, and therefore in the interocclusal distance. However we are well aware that, whether there is a stable, well-distributed occlusion, small or incremental mild shifts in vertical measurements do not lead to deleterious problems [12].

Adapting to new dents is not directly related to mechanical improvements. It may be proposed. During the post-insertion cycle, inherent dental problems and the patient's subjective problems can play a large part. Therefore, the patient evaluation is based on a thorough assessment of physical and psychological symptoms and on a practical outcome of the procedure. For a effective postinsertion cycle and long-term continuation in therapy, a thorough therapy preparation is necessary.

About every measurement tool was found to use the whole penis denture without suction and the whole mandibular denture with suction in this case of maxillo-mandibular edentulous patient.

The chewing habits "right lateral chewing," "left-lateral chewing," and "free chewing" of the use of the full mandibular denture without suction showed reduced duration of opening of the mouth, improved mouth opening, increasing the more regular use of maxilloscope edentulous patients. And, because these details are similar to the stable individual, complex chewing activity may be carried out. The movement range, closing movements took longer and their speed was slow, suggesting a masticatory chopper-type style, whereas the full jaw denture without the suction had a restricted range. So it was believed, however, that slow and strong jaw movement had prevailed on the vertical side to account for the weakness of mandibular tooth deterioration caused by the pinching of food bolus. Owing to a reduced period of occlusion when using the complete mandibular tooth without suction on the right-lateral chewing or chewing, it may be related to the poor mastication output of the tooth without suction since it has been stated that the remainder of the time at the intercuspal position will most likely extend the development of mastication[13].

This experimental study suggests that using the whole jaw denture with suction would be best for chewing than the whole jaw denture without suction. The link between assessment of dental competence and "dementia" and "degree of self-support" has reportedly been established among elderly patients[14]. 55% of the healthy dental patients belonged to the 'nondementia' group, while only 25% of the bad denture scores belonged to that group. Furthermore, 50 % of patients at good levels were in the "self-support" group, but this group included just 22% of poor dental scores. The reality shows that a good denture contributes significantly to the wellbeing and QOL of a patient. In an era of super-aging society, removable denture therapy is more demanded and good quality dentures are more profoundly affected by the company[15]. In fact, dentists will also build good quality dentures. Therefore, the use of strategies for creating a fully effective mandibular dentistry, with suction to the residual ridge, should also be essential to bring good news to edentulous patients in a therapy with completely edentulous jaws.

 

Conclusion

The words used for the mandibular motion were explained in their physical terms. Differences were compiled and found to be different between the resulting functional and non-functional mandibular movements. A work model , developed by Boswell, shows the differences in the stability of the underlying denture that occlusal pitch produces. Instead of recognition, the physics involved in the functional movement of the mandibular system should provide the basis for the occlusal surfaces of the posterior teeth used in the whole tooth production.

Within the scope of the study, the pattern of mandibular motion has been concluded that there are no significant changes between the pre and post-insertion stages of the use of complete dentures. Changes in the coordination of mandibular motion can not be associated with functional transitory issues after insertion of the denture.

 

 

References

1- Kurth LE. Physics of mandibular movement related to full denture construction. The Journal of Prosthetic Dentistry. 1954 Sep 1;4(5):611-20.

2- Fenlon M, Sherriff M, Walter J. Association between the accuracy of intermaxillary relations and complete denture usage. J Prosthet Dent 1999; 81: 520-5.

3- Fish S. Adaptation and habituation to full dentures. Br Dent J 1969; 127: 19-26

4- Jankelson B, Swain C, Crane P, Radke J. Kinesiometric instrumentation: a new technology. J Am Dent Assoc 1975; 90: 834-40.

5- Tallgren A, Mizutani H, Tryde G. A two-year kinesiographic study of mandibular movement patterns in denture wearers. J Prosthet Dent 1989; 62: 594-600.

6- Winkler, Rudolph : Textbook of Orthodontia Mechanics. University of Frankfort, 1933. Translated by Dr. R. S. Svinton (University of Mich.) p. 1

7- Kurth, L. E.: The Posterior Occlusal Plane in Full Denture Construction, J.A.D.A. 27:85-93, January 1940.

8- Berg E. Acceptance of full dentures. Int Dent J 1993; 43: 299-306.

9- Michman J, Langer A. Postinsertion changes in complete dentures. J Prosthet Dent 1975; 34: 125-34.

10- Mohl N. Neuromuscular mechanisms in mandibular function. Dent Clin North Am 1978; 22: 63-71

11- Nishigawa K, Nakano M, Bando E, Clark G. Effect of altered occlusal guidance on lateral border movement of the mandible. J Prosthet Dent 1992; 68: 965-9.

12- Carlsson G, Ingervall B, Kocak G. Effect of increasing vertical dimension on the masticatory system in subjects with natural teeth. J Prosthet Dent 1979; 41: 284-9.

13-  Maruyama, T: Clinical physiology of occlusion – Diagnosis and treatment of stomatognathic functions, 1st ed: 171, Ishiyaku, Tokyo, 1999 .

14-  Ikeda K, Hirai T, Kawakami T, et.al: Correlation between masticatory function of elderly adults with nursing care and degrees of dementia or self-support, Japanese J of Gerodontology, 14: 287-296, 2000

 15-  Kanaya M, Watanabe K, Miyakawa O,: Trial future estimates of bridge restorations involved with elderly adults and those adults of necessary supports as well as removable dentures, J of Japan Prosthodontic Society, 45: 227-237, 2001.