RSS-Feed abonnieren
![](/products/assets/desktop/img/oa-logo.png)
DOI: 10.4103/1305-7456.184166
Biomechanics of cervical tooth region and noncarious cervical lesions of different morphology; three-dimensional finite element analysis
Publikationsverlauf
Publikationsdatum:
24. September 2019 (online)
![](https://www.thieme-connect.de/media/10.1055-s-00042133/201603/lookinside/thumbnails/10-4103-1305-7456-184166_00413-1.jpg)
ABSTRACT
Objective: The present study aims to investigate the influence of presence and shape of cervical lesions on biomechanical behavior of mandibular first premolar, subjected to two types of occlusal loading using three-dimensional (3D) finite element method (FEM). Materials and Methods: 3D models of the mandibular premolar are created from a micro computed tomography X-ray image: model of sound mandibular premolar, model with the wedge-shaped cervical lesion (V lesion), and model with saucer-shaped cervical lesion (U lesion). By FEM, straining of the tooth tissues under functional and nonfunctional occlusal loading of 200 (N) is analyzed. For the analysis, the following software was used: CTAn program 1.10 and ANSYS Workbench (version 14.0). The results are presented in von Mises stress. Results: Values of calculated stress in all tooth structures are higher under nonfunctional occlusal loading, while the functional loading is resulted in homogeneous stress distribution. Nonfunctional load in the cervical area of sound tooth model as well as in the sub-superficial layer of the enamel resulted with a significant stress (over 50 [MPa]). The highest stress concentration on models with lesions is noticed on the apex of the V-shaped lesion, while stress in saucer U lesion is significantly lower and distributed over wider area. Conclusion: The type of the occlusal teeth loading has the biggest influence on cervical stress intensity. Geometric shape of the existing lesion is very important in the distribution of internal stress. Compared to the U-shaped lesions, V-shaped lesions show significantly higher stress concentrations under load. Exposure to stress would lead to its progression.
-
REFERENCES
- 1 Grippo JO. Abfractions: A new classification of hard tissue lesions of teeth. J Esthet Dent 1991; 3: 14-9
- 2 Pegoraro LF, Scolaro JM, Conti PC, Telles D, Pegoraro TA. Noncarious cervical lesions in adults: Prevalence and occlusal aspects. J Am Dent Assoc 2005; 136: 1694-700
- 3 Palamara JE, Palamara D, Messer HH, Tyas MJ. Tooth morphology and characteristics of non-carious cervical lesions. J Dent 2006; 34: 185-94
- 4 Yettram AL, Wright KW, Pickard HM. Finite element stress analysis of the crowns of normal and restored teeth. J Dent Res 1976; 55: 1004-11
- 5 Jakupović S, Vuković A, Korać S, Tahmiščija I, Bajsman A. The prevalence, distribution and expression of non-carious cervical lesions (NCCL) in permanent dentition. Mater Sociomed 2010; 22: 200-4
- 6 Aw TC, Lepe X, Johnson GH, Mancl L. Characteristics of noncarious cervical lesions: A clinical investigation. J Am Dent Assoc 2002; 133: 725-33
- 7 Borcic J, Anic I, Urek MM, Ferreri S. The prevalence of non-carious cervical lesions in permanent dentition. J Oral Rehabil 2004; 31: 117-23
- 8 Tajima K, Chen KK, Takahashi N, Noda N, Nagamatsu Y, Kakigawa H. Three-dimensional finite element modeling from CT images of tooth and its validation. Dent Mater J 2009; 28: 219-26
- 9 Ichim I, Schmidlin PR, Kieser JA, Swain MV. Mechanical evaluation of cervical glass-ionomer restorations: 3D finite element study. J Dent 2007; 35: 28-35
- 10 Francisconi LF, Graeff MS, Martins LdeM, Franco EB, Mondelli RF, Francisconi PA. et al. The effects of occlusal loading on the margins of cervical restorations. J Am Dent Assoc 2009; 140: 1275-82
- 11 Lertchirakarn V, Palamara JE, Messer HH. Finite element analysis and strain-gauge studies of vertical root fracture. J Endod 2003; 29: 529-34
- 12 Rees JS. The effect of variation in occlusal loading on the development of abfraction lesions: A finite element study. J Oral Rehabil 2002; 29: 188-93
- 13 Ichim I, Li Q, Loughran J, Swain MV, Kieser J. Restoration of non-carious cervical lesions Part I. Modelling of restorative fracture. Dent Mater 2007; 23: 1553-61
- 14 Borcic J, Antonic R, Urek MM, Petricevic N, Nola-Fuchs P, Catic A. et al. 3-D stress analysis in first maxillary premolar. Coll Antropol 2007; 31: 1025-9
- 15 Borcic J, Anic I, Smojver I, Catic A, Miletic I, Ribaric SP. 3D finite element model and cervical lesion formation in normal occlusion and in malocclusion. J Oral Rehabil 2005; 32: 504-10
- 16 Romeed SA, Malik R, Dunne SM. Stress analysis of occlusal forces in canine teeth and their role in the development of non-carious cervical lesions: Abfraction. Int J Dent 2012; 2012: 234845
- 17 Michael JA, Townsend GC, Greenwood LF, Kaidonis JA. Abfraction: Separating fact from fiction. Aust Dent J 2009; 54: 2-8
- 18 Yaman SD, Sahin M, Aydin C. Finite element analysis of strength characteristics of various resin based restorative materials in class V cavities. J Oral Rehabil 2003; 30: 630-41
- 19 Rees JS, Hammadeh M. Undermining of enamel as a mechanism of abfraction lesion formation: A finite element study. Eur J Oral Sci 2004; 112: 347-52