Abstract
Statement of problem
The optimum selection of denture teeth for patients with a reduced interarch distance
has not been established.
Purpose
The purpose of this in vitro study was to investigate the influence of denture tooth
material and thickness on the fracture resistance of thin acrylic resin denture bases.
Material and methods
Acrylic resin (AC), composite resin (CO), or ceramic (CE) molar denture teeth were
embedded in denture base blocks (2.0 mm thick). The distance from the central fossa
to the tooth base was 0.5, 1.0, 2.0, or 2.5 mm for AC and CO, and 1.0 mm for CE (n=7),
with a total thickness of 2.5 mm for all specimens. Each specimen was placed on a
3-point flexural setup with a shorter (8 mm) or longer (12 mm) support span than the
tooth width and vertically loaded. A finite element analysis was performed to assess
the stress distributions. The effects of tooth thickness and support span were statistically
tested with ANOVA, followed by the Tukey honestly significant difference post hoc
test (α= .05).
Results
With the shorter support, the mean fracture load was higher in CO than AC, regardless
of the tooth thickness. Under the longer support, the mean fracture load with the
CO decreased significantly as the tooth thickness increased, with increased maximum
stress. Some CO tooth specimens of 2.0 mm or 2.5 mm thickness failed at the tooth-denture
base interface at significantly lower loads than those exhibited by tooth fractures.
CE showed minor cracks before bulk fracture.
Conclusions
Higher fracture resistance was indicated with CO; however, the resistance decreased
as the thickness of the CO tooth increased.
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References
- Evaluation of damage to removable dentures in two cities in Finland.Acta Odontol Scand. 1993; 51: 363-369
- Denture fracture-a survey.Br Dent J. 1994; 176: 342-345
- Effect of metal strengthener length on stress distribution in acrylic denture bases: a finite element study.J Oral Rehabil. 2004; 31: 879-883
- Flexural properties of repaired heat-polymerising acrylic resin after wetting with monomer and acetone.Gerodontology. 2010; 27: 217-223
- Late results of treatment with partial dentures. An investigation by questionnaire and clinical examination 13 years after treatment.J Oral Rehabil. 1976; 3: 267-272
- Influence of the buccolingual position of artificial posterior teeth on the pressure distribution on the supporting tissue under a complete denture.J Oral Rehabil. 1996; 23: 456-463
- Two-dimensional finite element analysis of stresses developed in the supporting tissues under complete dentures using teeth with different cusp angulations.Gerodontology. 2008; 25: 155-161
- Stress area of the mandibular alveolar mucosa under complete denture with linear occlusion at lateral excursion.Chin Med J (Engl). 2010; 123: 917-921
- Effects of rigid and nonrigid extracoronal attachments on supporting tissues in extension base partial removable dental prostheses: a nonlinear finite element study.J Prosthet Dent. 2011; 105: 338-346
- An in vitro study of the influence of occlusal scheme on the pressure distribution of complete denture supporting tissues.Int J Prosthodont. 1996; 9: 179-187
- The partially edentulous patient. I. The biologic price of prosthodontic intervention.Aust Dent J. 1980; 25: 63-68
- Management of tooth surface loss.Br Dent J. 2002; 192 (9-23): 11-16
- The static strength and modulus of fiber reinforced denture base polymer.Dent Mater. 2005; 21: 421-428
- Comparative study of the mechanical properties of fiber-reinforced denture base resin.J Appl Polymer Sci. 2009; 113: 716-720
- Some mechanical properties of a highly cross-linked, microwave-polymerized, injection-molded denture base polymer.Int J Prosthodont. 2001; 14: 214-218
- Resinous denture base fracture resistance: effects of thickness and teeth.Int J Prosthodont. 2012; 25: 53-59
- Monomer priming of denture teeth and its effects on the bond strength of composite resin.J Prosthet Dent. 2014; 112: 257-266
- Effect of repair resin type and surface treatment on the repair strength of heat-polymerized denture base resin.J Prosthet Dent. 2014; 111: 71-78
- Pressure transmission and distribution under impact load using artificial denture teeth made of different materials.J Prosthet Dent. 2009; 102: 319-327
- Pressure transmission and distribution under denture bases using denture teeth with different materials and cuspal angulations.J Prosthet Dent. 2011; 105: 127-136
- Bite force and state of dentition.Acta Odontol Scand. 1977; 35: 297-303
- Association of bite force with ageing and occlusal support in older adults.J Dent. 2005; 33: 131-137
- Bite forces with mandibular implant-retained overdentures.J Dent Res. 1998; 77: 1832-1839
- In vivo evaluation of occlusalcontact area and maximum bite force in patients with various types of implant-supported prostheses.Acta Odontol Scand. 2013; 71: 1181-1187
- Prosthodontic treatment for edentulous patients: complete dentures and implant supported prostheses.13th ed. Mosby, St Louis2013: 139-144
- Craig’s restorative dental materials.12th ed. Elsevier, St Louis2006: 544-546
- Bond strength of denture teeth to denture base resins.Int J Prosthodont. 2000; 13: 59-65
- Evaluation of resin composite polymerization by three dimensional micro-CT imaging and nanoindentation.Dent Mater. 2011; 27: 1070-1078
- Biomechanics of the mandible: part II. Development of a 3-dimensional finite element model to study mandibular functional deformation in subjects treated with dental implants.Int J Oral Maxillofac Implants. 2007; 22: 455-466
Article info
Publication history
Published online: March 17, 2015
Footnotes
Supported by a Grant-in-Aid (24592902 to N.W. and 24792064 to S.I.) from the Japan Society for Promotion of Science/MEXT.
Identification
Copyright
© 2015 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.
