Denture foundation tissues loading criteria in evaluation of dentures wearing characteristics

• Autorzy: Kasperski J. , Żmudzki J. , Chladek G.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Rationalization of rules determining shape of dentures functional characteristics requires knowledge of loading state of tissue denture foundation. Design/methodology/approach: During FEM numerical modeling there was made evaluation of loading state of denture foundation tissues pressed by a hard denture and relined by a silicone layer. Findings: Maximum shear is observed under mucous surface at bone on the side of process prominence. Soft tissues injuries and pain discomfort might result from exceeding both tolerances of pressure and shear, which maximum values are located in the opposite areas. Maximum pressure values are present in central areas at tips of edentulous ridges. The layers of relining material results in a decrease and balancing of maximum pressure values. It decreases tendencies of slip and frictional injuries occurrence by means of reducing tangential stresses on the mucous interface. Nevertheless, the transfer of part of loadings on ridges slopes results in increased shear inside of the tissue at the side of the convexity. In bone tissue at the tips of edentulous ridges there is observed decrease of principal stresses and the lack of significant changes of equivalent von Mises stresses. Research limitations/implications: One of the model simplifying assumptions was the assumption of isotropic linear elasticity of materials mechanical characteristics and denture adherence to its foundation. Practical implications: Recommended to relining are injuries occurring in the central area of bone convexities. If, in spite of a proper denture fit, there is still a typical ulceration at the side of the ridges convexity, use of relining increases shear of those area of the tissue, conducing development of a typical deep ulcer located usually from the bone towards the surface of soft tissues. Originality/value: Tangential stresses and loads on mucous surface are not the only one criterion of evaluation and diagnosis of mucous membrane loading state.

Słowa kluczowe

EN

biomaterials; mechanical properties; denture relining; tissue

PL

biomateriały; właściwości mechaniczne; wymiana protez; tkanki

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2010
• Tom: Vol. 43, nr 1
• Strony: 324--332
• Opis fizyczny: Bibliogr. 30 poz., rys., wykr.

Twórcy

autor

Kasperski J.

• Department of Prosthetic Dentistry, Medical University of Silesia, Plac Akademicki 17, 41-902 Bytom, Poland

autor

Żmudzki J.

• Department of Materials Technology, Silesian University of Technology, ul. Krasińkiego 8, 40-019 Katowice, Poland

autor

Chladek G.

• Department of Materials Technology, Silesian University of Technology, ul. Krasińkiego 8, 40-019 Katowice, Poland

Bibliografia

• [1] J. Kasperski, W. Chladek, T. Lipski, J. Żmudzki, Characterization of loads and supporting conditions of dentures filling lateral dentitions losses, Acta of Bioengineering and Biomechanics 3/2 (2001) 245-250 (in Polish).
• [2] J. Okrajni, M. Plaza, S. Ziemba, Computer modelling of the heat flow in surgical cement during endoprosthesoplasty, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 311-314.
• [3] I. Knets, V. Krilova, R. Cimdins, L. Berzina, V. Vitins, Stiffness and strength of composite acrylic bone cements, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 135-138.
• [4] J. Żmudzki, W. Chladek, T. Lipski, Influence of tongue activity on lower complete denture retention under biting forces, Acta of Bioengineering and Biomechanics 10/3 (2008) 13-20.
• [5] G. Chladek, Durability evaluation of a friction couple intended for implantological stabilization of complete dentures, Acta of Bioengineering and Biomechanics 10/3 (2008) 7-12.
• [6] J. Żmudzki, W. Chladek, Identification of biomechanics related to single implant-retained tissue-supported dentures, Prosthodontics 60/1 (2010) 17-22 (in Polish).
• [7] J. Żmudzki, W. Chladek, Elastic silicone matrices as a tool for load relief in overdenture implants, Acta of Bioengineering and Biomechanics 10/4 (2008) 7-14.
• [8] J. Żmudzki, W. Walke, W. Chladek, Influence of model discretization density in FEM numerical analysis on the determined stress level in bone surrounding dental implants, Information Technologies in Biomedicine. Advances in Soft Computing 47 (2008) 559-567.
• [9] W. Chladek, G. Chladek, T. Lipski, J. Margielewicz, J. Żmudzki, Biomechanical problems related to design of implantological overdenture stabilization system, Monographs, No. 152, Silesian University of Technology Press, Gliwice, 2008 (in Polish).
• [10] W. Chladek, J. Kasperski, Biomaterials and biomechanics in dentistry, PTIM, Zabrze, 2010 (in Polish).
• [11] A. Jainkittivong, V. Aneksuk, R.P. Langlais, Oral mucosal conditions in elderly dental patients, Oral Diseases 8/4 (2002) 218-223.
• [12] D.L. Brunello, M.N. Mandikos, Construction faults, age, gender, and relative medical health: factors associated with complaints in complete denture patients, Journal of Prosthetic Dentistry 79 (1998) 545-554.
• [13] H. Murata, N. Taguchi, T. Hamada, J.F. McCabe, Dynamic viscoelastic properties and the age changes of long-term soft denture liners, Biomaterials 21 (2000) 1421-1427.
• [14] I. Ishizuka, T. Mikozami, Relationship between impression method of mucosa-borne area and denture pressure supportability, The Bulletin of Tokyo Dental College 34/1 (1993) 23-32.
• [15] Y. Sato, Y. Abe, H. Okane, K. Tsuga, Finite element analysis of stress relaxation in soft denture liner, Journal of Oral Rehabilitation 27/8 (2000) 660-663.
• [16] Y. Takayama, T. Yamada, O. Araki, T. Seki, T. Kawasami, The dynamic behaviour of a lower complete denture during unilateral loads: analysis using the finite element method, Journal of Oral Rehabilitation 28/11 (2001) 1064-1074.
• [17] C. Oomens, O. Bressers, E. Bosboom, C. Bouten, D. Bader, Can loaded interface characteristics influence strain distributions in muscle adjacent to bony prominences?, Computer Methods in Biomechanics and Biomedical Engineering 6/3 (2003) 171-180.
• [18] A. Gefen, N. Gefen, E. Linder-Ganz, S.S. Margulies, In vivo muscle stiffening under bone compression promotes deep pressure sores, Journal of Biomechanical Engineering 127/3 (2005) 512-524.
• [19] R. Ragan, T.W. Kernozek, M. Bidar, J.W. Matheson, Seat interface pressures on various thicknesses of foam wheelchair cushions: a finite modeling approach, Archives of Physical Medicine and Rehabilitation 83 (2002) 872-875.
• [20] M. Kosiak, Etiology of decubitus ulcers, Archives of Physical Medicine and Rehabilitation 42 (1961) 19-29.
• [21] R. Goossens, R. Zegers, D. Hoek van Dijke, C. Snijders, Influence of shear on skin oxygen tension, Clinical Physiology 14 (1994) 111-118.
• [22] M. Chabanas, Y. Payan, C. Marecaux, P. Swider, F. Boutault, Comparison of linear and non-linear soft tissue models with post-operative CT scan in maxillofacial surgery, In: S. Cotin and D. Metaxas (Eds.): ISMS, 2004, LNCS 3078, 19-27.
• [23] I. Hayakawa, S. Hirano, S. Kobayashi, M. Nagao, E. Masuhara, The creep behaviour of denture-supporting tissues and soft lining materiale, International Journal of Prosthodontics 7/4 (1994) 339-347.
• [24] W. Józefowicz, Results of studies on elasticity moduli of the soft tissues of the denture-bearing area, Prosthodontics 20/3 (1970) 171-176(in Polish).
• [25] H. Murata, T. Hamada, S. Sadamori, Relationship between viscoelastic properties of soft denture liners and clinical efficacy, Japanese Dental Science Review 44 (2008) 128-132.
• [26] T. Kawasaki, Y. Takayama, T. Yamada, K. Notani, Relationship between the stress distribution and the shape of the alveolar residual ridge – three-dimensional behaviour of a lower complete denture, Journal of Oral Rehabilitation 28/10 (2001) 950-957.
• [27] I.C. Mackenzie, R.L. Ettinger, Differences in the response of rodent oral mucosa and skin to repeated surface trauma, Journal of Prosthetic Dentistry 4/6 (1975) 666-674.
• [28] J. Prinz, R. de Wijk, L. Huntjens, Load dependency of the coefficient of friction of oral mucosa, Food Hydrocolloids 21 (2007) 402-408.
• [29] W.F. Schmidt Jr, D.E. Smith, A six-year retrospective study of Molloplast-B-lined dentures. Part I: patient response, Journal of Prosthetic Dentistry 50 (1983) 308-313.
• [30] R. de Wijk, J. Prinz, The role of friction in perceived oral texture, Food Quality and Preference 16 (2005) 121-129.