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Recent advance in appliances and materials enhancing therapy of disorders of the stomatognathic system

Authors:

Abstract

Purpose: Dysfunctions of the stomatognathic system are treated with a lot of appliances. The aim of the work was to evaluate the current state in the field of diagnostic techniques and technological advance in appliances and materials enhancing therapy of occlusion disorders of the stomatognathic system. Design/methodology/approach: The principles of appliances functioning, manufacturing technology and materials were analysed. The analysis was made on the basis of the literature review and patent databases, conducting searches for a combination of keywords: dental material, occlusion, disorder, bruxism, clenching, grinding, appliance, therapy, tongue, oral, exerciser, trainer, mandible muscle, bite splint, dental plate. In the case of principles of functioning, devices that require insertion into the mouth are included in the tests. In technology and materials, attention has been paid to necessity of involving a dental technician or ability to perform appliance intra-orally ("chairside"), as well as mass production with possibility of custom fit. Findings: The most widespread in the treatment of disorders of the stomatognathic system are thermoformed materials and devices that are introduced between the dental arches to counteract occlusions of all teeth or selected teeth or force the position of the mandible in relation to the maxilla. Devices that function differently are those in which therapeutic effects result from toning of activity of the elevating mandibular muscles by provoking activity of the opposing muscles lowering the mandible or reducing intra-oral space, for example, by sublingual plates or tongue trainers. Appliances are mainly manufactured of: poly (ethylenevinyl acetate) or polycarbonates, as also mouldable polymers such as: acrylics, polyesters and rubbers. Research limitations/implications: Electronic devices that are not intended to therapy but used only to track mandible mobility or muscle activity during sleep were not taken into account. Practical implications: Solutions activating the action of the opposing muscles to the muscles lifting the mandible are few, and among them one device is retained on teeth without interfering in occlusion. Originality/value: Dental materials for devices for treatment of occlusion disorders are selected with no understanding the influence of elastic and frictional material properties and structure stiffness on the distribution of occlusion forces between the teeth and reactions in temporo-mandibular joints.
74
Volume 90
Issue 2
April 2018
Pages 74-84
International Scientific Journal
published monthly by the
World Academy of Materials
and Manufacturing Engineering
© Copyright by International OCSCO World Press. All rights reserved. 2018
LITERATURE REVIEW
Recent advance in appliances and
materials enhancing therapy of disorders
of the stomatognathic system
M. Sołtysiak-Niedziela a, K. Kwieciński b, J. Żmudzki c,*
a Stomatologic Centre "Uśmiechnij mi się", ul. Sadowa 67, 32-600 Oświęcim, Poland
b APIpharma Sp. z o.o. i Wspólnicy Sp. K., ul. Kosciuszki 44/7, 40-040 Katowice, Poland
c Institute of Engineering Materials and Biomaterials, Silesian University of Technology,
ul. Konarskiego 18A, 44-100 Gliwice, Poland
* Corresponding e-mail address: jaroslaw.zmudzki@polsl.pl
ABSTRACT
Purpose: Dysfunctions of the stomatognathic system are treated with a lot of appliances.
The aim of the work was to evaluate the current state in the field of diagnostic techniques
and technological advance in appliances and materials enhancing therapy of occlusion
disorders of the stomatognathic system.
Design/methodology/approach: The principles of appliances functioning, manufacturing
technology and materials were analysed. The analysis was made on the basis of the
literature review and patent databases, conducting searches for a combination of keywords:
dental material, occlusion, disorder, bruxism, clenching, grinding, appliance, therapy,
tongue, oral, exerciser, trainer, mandible muscle, bite splint, dental plate. In the case of
principles of functioning, devices that require insertion into the mouth are included in the
tests. In technology and materials, attention has been paid to necessity of involving a
dental technician or ability to perform appliance intra-orally ("chairside"), as well as mass
production with possibility of custom fit.
Findings: The most widespread in the treatment of disorders of the stomatognathic system
are thermoformed materials and devices that are introduced between the dental arches to
counteract occlusions of all teeth or selected teeth or force the position of the mandible in
relation to the maxilla. Devices that function differently are those in which therapeutic effects
result from toning of activity of the elevating mandibular muscles by provoking activity of
the opposing muscles lowering the mandible or reducing intra-oral space, for example, by
sublingual plates or tongue trainers. Appliances are mainly manufactured of: poly (ethylene-
vinyl acetate) or polycarbonates, as also mouldable polymers such as: acrylics, polyesters
and rubbers.
Research limitations/implications: Electronic devices that are not intended to therapy
but used only to track mandible mobility or muscle activity during sleep were not taken into
account.
Practical implications: Solutions activating the action of the opposing muscles to the
muscles lifting the mandible are few, and among them one device is retained on teeth
without interfering in occlusion.
75
Recent advance in appliances and materials enhancing therapy of disorders of the stomatognathic system
Volume 90 Issue 2 April 2018
Originality/value: Dental materials for devices for treatment of occlusion disorders are
selected with no understanding the influence of elastic and frictional material properties and
structure stiffness on the distribution of occlusion forces between the teeth and reactions in
temporo-mandibular joints.
Keywords: Dental material, Thermoforming, Moulding, Bite splint, Disorder, Stomatognathic
system
Reference to this paper should be given in the following way:
M. Sołtysiak-Niedziela, K. Kwieciński, J. Żmudzki, Recent advance in appliances and
materials enhancing therapy of disorders of the stomatognathic system, Archives of
Materials Science and Engineering 90/2 (2018) 74-84.
BIOMEDICAL AND DENTAL MATERIALS AND ENGINEERING
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1. Introduction
76
M. Sołtysiak-Niedziela, K. Kwieciński, J. Żmudzki
Archives of Materials Science and Engineering
LITERATURE REVIEW
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3. Description of achieved results
2. Methods
3.1. Diagnosis and evaluation of treatment
effects
77
Recent advance in appliances and materials enhancing therapy of disorders of the stomatognathic system
Volume 90 Issue 2 April 2018
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3.2. Devices and materials for the treatment
of occlusion disorders
78
M. Sołtysiak-Niedziela, K. Kwieciński, J. Żmudzki
Archives of Materials Science and Engineering
LITERATURE REVIEW
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79
Recent advance in appliances and materials enhancing therapy of disorders of the stomatognathic system
Volume 90 Issue 2 April 2018
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M. Sołtysiak-Niedziela, K. Kwieciński, J. Żmudzki
Archives of Materials Science and Engineering
LITERATURE REVIEW
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References
4. Conclusions
81
Recent advance in appliances and materials enhancing therapy of disorders of the stomatognathic system
Volume 90 Issue 2 April 2018
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82
M. Sołtysiak-Niedziela, K. Kwieciński, J. Żmudzki
Archives of Materials Science and Engineering
LITERATURE REVIEW
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83
Recent advance in appliances and materials enhancing therapy of disorders of the stomatognathic system
Volume 90 Issue 2 April 2018
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84 READING DIRECT: www.archivesmse.org
LITERATURE REVIEW
M. Sołtysiak-Niedziela, K. Kwieciński, J. Żmudzki
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... At the same time, relatively little is known about the root causes of the problems that have arisen. Linking the causes with anatomical changes that cause more problems in patients may create the basis for the use of therapy using modern rehabilitation materials and devices [11,12] in a very early stage of treatment, which will prevent further complications that may ultimately result in the need for TMJ implants [13]. The present study examines whether we can detect asymmetrical changes in the mandible ramus on panoramic X-rays that may indicate TMD. ...
Article
It is essential to acquire data that will allow the detection of problems occurring within anatomical material structures before the appearance of obvious symptoms of TMD and to design materials and devices in order to take preventive measures. The aim was to examine if asymmetrical changes in the mandible ramus height may indicate TMD. Hypotheses were that asymmetry may be an indicator of TMD and that trauma at a young age may lead to growth changes in the height of the mandibular ramus, hence asymmetries.An investigated group consisted of 65 patients with TMD, and the control group consisted of 20 patients with no TMD. The images were obtained with a Durr Vista Panoramic system. The differences in the height of the ramus were calculated. Statistical analysis of the results was performed.Most patients diagnosed with TMD experienced traumatic events in childhood, while no similar cases were reported in the control group. Significant asymmetry was also found in the TMD group. The gender of the patients did not influence the asymmetries. There was no correlation between the age of the patients and the asymmetry in patients with TMD. Still, the correlation occurred in the control group due to significant asymmetries for the youngest patients.The small size of the investigated and control group and the fact that patients come from a private clinic in a geographic area with a low population density were limiting factors.Asymmetries are an indicator of TMD, which may facilitate the early diagnosis of this TMD and the early implementation of treatment using polymeric materials. The knowledge that the development of asymmetry may be related to accidents in childhood or adolescence indicates that such patients should be subjected to preventive observation.The study offers knowledge useful for designing rehabilitation polymeric materials and devices. Asymmetrical changes in the mandible ramus high may be indicative of TMD. TMD is strongly associated with trauma declared by patients at a young age.
... Most devices for treating occlusal disorders work on the principle of an occlusal obstruction or mandibular positioner [12]. Solutions to activate the muscles opposing the adductor muscles are few. ...
Article
https://archivesmse.org/resources/html/article/details?id=613322&language=en Temporomandibular disorders (TMD) are one of the leading health problems in dentistry. The work aimed to evaluate, using FEM, the influence of the material elastic properties of the flexible obstacle of the tongue trainer on the range of deflection and strength.In prototyping the trainer tongue, the starting point was real models with different extents of the tongue obstacle. moulded from dental wax on a dental stone model. Then versions were tested intraorally for the perception of the space occupied by the tongue. The models were scanned on a 3D scanner, and then a parametric CAD model (NX Siemens) was made on their basis. Finally, in order to take into account, the anatomical aspects, the two extreme ranges of the tongue obstacle, named "Long " and " Short ", were developed. Simulation deflection and material strength tests were made using FEM in the linear range (NX Siemens). Calculations were made for materials with Young's modulus equal to 8 MPa, 80 MPa and 800 MPa. The interaction of the tongue with the force of 5N was assumed. The support was provided by the retention surface on the teeth, with the support of the posterior edge of the obstacle on the palate (palatal variant) or lack of support, i.e., the obstacle freely bending in this area (free variant), was additionally tested. In order to assess the drop or retention of the trainer on the teeth, the second type of simulation was performed with the assumption of horizontal (anteriorly directed) tongue pressure with the force of 10N for the condition of rigid support in the area of the teeth and the periodontal zone from the lingual side. In this variant, a simulation was adopted for a material with a modulus of elasticity E=80 MPa.The stress values of the flexible obstacle of the trainer were obtained, allowing for the selection of potentially valuable materials for the trainer's construction. The results obtained in the simulations indicate the possibility of using ethylene vinyl acetate (EVA) and its blends. The accumulation of saliva inside the sealed obstacle was found, which indicated the need to look for an area to perforate without losing the load capacity of the obstacle. The structural feasibility of solving the problem of saliva accumulation without a significant change in the load capacity and stiffness of the obstacle was confirmed by simulation.Simplifying the model to a linear range does not allow buckling analysis. In addition, the assumption of a linear material further limits the possibility of analysing materials with softening and plateau characteristics, where the compliance of the structure leads to elastic buckling.The range of deflections and stresses for different stiffness of the elastic element of the trainer was determined in order to select the appropriate material for the medical device (MD). Polyurethanes or silicones provide the range of deflection and strength, but in the case of manufacturing prefabricated trainers thermoformed in the patient's mouth (maximum temperature 75C), the material that can be used is ethylene vinyl acetate (EVA).Simulation tests made it possible to determine the range of deflections and stress for different stiffness of the flexible obstacle of the trainer in order to select the appropriate material for the medical device.
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