Morphological factors of mandibular edentulous alveolar ridges influencing the movement of dentures calculated using finite element analysis

Takayama, Yoshihisa; Sasaki, Hidetada; Goto, Marie; Mizuno, Kentaro; Saito, Morio; Yokoyama, Atsuro

doi:10.1016/j.jpor.2010.09.007

Cited by 5 publications

(8 citation statements)

References 5 publications

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“…A search in databases did not bring up a study that has evaluated the need for relining. However, there are several studies available that have shown the effect of ridge morphology on retention and stability of complete dentures and finally the patients' satisfaction and an increase in masticatory efficacy (6)(7)(8)(9)(10)(11).…”

Section: Discussionmentioning

confidence: 99%

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Determination of the Rate of Need for Relining Complete Dentures in Patients Referring to a Department of Prosthodontics

Negahdari¹,

Pakdel²,

Bohluli³

et al. 2016

ABCmed

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Introduction: Complete edentulous patients are an important part of prosthodontics department referrals. After a while of prosthetic use, complications such as loosening, tissue irritation, and inefficiency in chewing or change the appearance, cause the need of reline. The purpose of present study is evaluation of complete prosthesis relining needs in patients referring to removable prosthodontics department of Tabriz dentistry faculty in 2014. Materials & Methods: This retrospective study was conducted on 96 patients that referred to removable prosthetic department in dental faculty of Tabriz by questionnaire and clinical examination. Data were analyzed in SPSS21 software. In this study, P value less than 0.05 was considered statistically significant. Results: 61.5 % of patients were men and mostly were in 51-60 years old group. 83.3% had U-shaped ridge and 16.7% had V-shaped ridge. 5.2% of patients only in upper denture and 11.5% of them only in lower denture were required to reline. Also 8.3% of patients in both upper and lower denture were needed reline.75% didn't need to denture reline. Needs to reline were more in U-shaped ridge. Conclusions: Finally, the results of statistical analysis show that there was a significant relationship between need of reline and the residual ridge but there was not a significant relationship between need of reline and gender and also the time of the prosthesis is going to delivery.

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Section: Discussionmentioning

confidence: 99%

“…It was concluded in a study by Takayama et al that the height and form of the residual ridge had a significant role in preventing denture dislodgment under unilateral or bilateral forces (10). Batt et al concluded that both the patient's oral cavity conditions and the quality of the dentures fabricated affect the success of dentures (11).…”

Section: Discussionmentioning

confidence: 99%

Determination of the Rate of Need for Relining Complete Dentures in Patients Referring to a Department of Prosthodontics

Negahdari¹,

Pakdel²,

Bohluli³

et al. 2016

ABCmed

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“…Food comminution results from crushing particles over a relatively short distance, no greater than 2–3 mm, with the involvement of lateral, but not anteroposterior, pounding movements of the mandible. However, most analyzed models are too simplified, as only the effect of isolated vertical force is assumed (Kumar 2014 ; Takayama et al 2011 ; Kawano et al 1993 ). This idealization may result from limitations in the measurement methods, as usually only the vertical component of force is measured, but the horizontal component of force is also present as determined by cusp shapes.…”

Section: Biting Force and The Biomechanics Of Masticationmentioning

confidence: 99%

“…Few authors have considered the abrasive processes beneath a denture as a criterion for the traumatic effect on the mucosal foundation. Takayama et al ( 2011 ) simulated the sliding of a denture loaded with vertical forces, but they eventually did not report on the contact stresses beneath the denture. They reported the denture movement as neither actual nor functional, although equivalent to the clinical examination of the stability of dentures under bilateral and unilateral pressure over the occlusal surface (Gerber 1974 ).…”

Section: Loading Of the Denture Foundation Under Mastication Forcesmentioning

confidence: 99%

“…They reported the denture movement as neither actual nor functional, although equivalent to the clinical examination of the stability of dentures under bilateral and unilateral pressure over the occlusal surface (Gerber 1974 ). Small denture movements resulted from the displaceability of the mucosa, and small slides were associated with clenching or swallowing; hence, the lack of realistic slides accompanying mastication provides no basis for evaluating (Takayama et al 2011 ) the selection and arrangement of artificial teeth as desirable and with good adaptation to the ridge. Another study (Kawasaki et al 2001 ), based on a numeric simulation of a denture slide on a mucosal surface, showed that the risk of abrasion increases when there is atrophy of the edentulous alveolar ridge in the anterior mandibular segment; as a result, the denture slides down anteriorly on its slope foundation.…”

Section: Loading Of the Denture Foundation Under Mastication Forcesmentioning

confidence: 99%

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Biomechanical factors related to occlusal load transfer in removable complete dentures

Żmudzki

Chladek

Kasperski

2014

Biomech Model Mechanobiol

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Owing to economic conditions, removable dentures remain popular despite the discomfort and reduced chewing efficiency experienced by most denture wearers. However, there is little evidence to confirm that the level of mucosal load exceeds the pressure pain threshold. This discrepancy stimulated us to review the current state of knowledge on the biomechanics of mastication with complete removable dentures. The loading beneath dentures was analyzed in the context of denture foundation characteristics, salivary lubrication, occlusal forces, and the biomechanics of mastication. The analysis revealed that the interpretation of data collected in vivo is hindered due to the simultaneous overlapping effects of many variables. In turn, problems with determining the pressure beneath a denture and analyzing frictional processes constitute principal limitations of in vitro model studies. Predefined conditions of finite element method simulations should include the effects of oblique mastication forces, simultaneous detachment and sliding of the denture on its foundation, and the stabilizing role of balancing contacts. This review establishes that previous investigations may have failed because of their unsubstantiated assumption that, in a well-working balanced occlusion, force is only exerted perpendicular to the occlusal plane, allowing the denture to sit firmly on its foundation. Recent improvements in the simulation of realistic biomechanical denture behavior raise the possibility of assessing the effects of denture design on the pressures and slides beneath the denture.

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Biomechanics of oral mucosa

Chen

Ahmad

et al. 2015

J. R. Soc. Interface.

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The prevalence of prosthodontic treatment has been well recognized, and the need is continuously increasing with the ageing population. While the oral mucosa plays a critical role in the treatment outcome, the associated biomechanics is not yet fully understood. Using the literature available, this paper provides a critical review on four aspects of mucosal biomechanics, including static, dynamic, volumetric and interactive responses, which are interpreted by its elasticity, viscosity/permeability, apparent Poisson's ratio and friction coefficient, respectively. Both empirical studies and numerical models are analysed and compared to gain anatomical and physiological insights. Furthermore, the clinical applications of such biomechanical knowledge on the mucosa are explored to address some critical concerns, including stimuli for tissue remodelling (interstitial hydrostatic pressure), pressure–pain thresholds, tissue displaceability and residual bone resorption. Through this review, the state of the art in mucosal biomechanics and their clinical implications are discussed for future research interests, including clinical applications, computational modelling, design optimization and prosthetic fabrication.

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Morphological factors of mandibular edentulous alveolar ridges influencing the movement of dentures calculated using finite element analysis

Cited by 5 publications

References 5 publications

Determination of the Rate of Need for Relining Complete Dentures in Patients Referring to a Department of Prosthodontics

Determination of the Rate of Need for Relining Complete Dentures in Patients Referring to a Department of Prosthodontics

Biomechanical factors related to occlusal load transfer in removable complete dentures

Biomechanics of oral mucosa

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