Identification of dynamic load for prosthetic structures

Abstract

Dynamic load exists in numerous biomechanical systems, and its identification signifies a critical issue for characterizing dynamic behaviors and studying biomechanical consequence of the systems. This study aims to identify dynamic load in the dental prosthetic structures, namely, 3-unit implant-supported fixed partial denture (I-FPD) and teeth-supported fixed partial denture. The 3-dimensional finite element models were constructed through specific patient's computerized tomography images. A forward algorithm and regularization technique were developed for identifying dynamic load. To verify the effectiveness of the identification method proposed, the I-FPD and teeth-supported fixed partial denture structures were investigated to determine the dynamic loads. For validating the results of inverse identification, an experimental force-measuring system was developed by using a 3-dimensional piezoelectric transducer to measure the dynamic load in the I-FPD structure in vivo. The computationally identified loads were presented with different noise levels to determine their influence on the identification accuracy. The errors between the measured load and identified counterpart were calculated for evaluating the practical applicability of the proposed procedure in biomechanical engineering. This study is expected to serve as a demonstrative role in identifying dynamic loading in biomedical systems, where a direct in vivo measurement may be rather demanding in some areas of interest clinically.

In vivo measurement of three-dimensional load exerted on dental implants: a literature review

“…The authors also clarified that the load on the implant at gum chewing was basically larger than that at maximum voluntary clenching (MVC). Other studies [ 38 , 39 ] reported that the load magnitude was affected by food texture, and the load magnitude during chewing was larger than that during MVC. The data were subsequently used for advanced experimental and numerical purposes, such as finite element analysis (FEA), and the effect of peri-implant bone resorption on the stress distribution in implant body was investigated [ 40 ].…”

Novel Self-powered Flexible Thin Bite Force Sensor with Electret and Dielectric Elastomer

“…To meet the aforementioned requirements, several bite force sensor systems have been developed. (9,10) The sensor must be sufficiently thin not to interfere with occlusion to measure bite force in the maximal intercuspal position, which is the best-fit position of the opposing teeth. Furthermore, a wearable measurement system is required to monitor bruxism during sleep.…”

Simulation of orthodontic force of archwire applied to full dentition using virtual bracket displacement method

“…Compared with the measurement method in vitro, theoretical calculation represented by finite element method (FEM) with the advantages of controllable experimental conditions, low cost, and short experimental cycle is more and more popular in recent decades. [21][22][23][24] Various methods for orthodontic force simulation which applied external force loads to teeth or appliances can be found in literature. Liao et al 1 applied distally directed tipping and bodily forces to human maxillary to investigate optimal orthodontic force.…”