Importance of aging to dehydration shrinkage of human dentin

Wang, Raorao; Mao, Shuangshuang; Romberg, Elaine; Arola, D.; Zhang, Dongsheng

doi:10.1007/s10483-012-1553-8

Cited by 7 publications

(3 citation statements)

References 34 publications

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“…33,34 Due to the consequent changes in the mineral to the collagen ratio, this process may influence the degree of hydrogen bonding that occurs with the loss of water and the shrinkage extent as a result of dehydration. Wang et al 35 studied the aging importance to dehydration shrinkage of human dentin and found that the degree of anisotropy in the shrinkage increases from the pulp to the EDJ and is the largest in the young dentin (23 age 34). Another age change was an increase in dead tracts within dentin.…”

Section: Resultsmentioning

confidence: 99%

In vitro thermal diffusivity measurements as aging process study in human tooth hard tissues

Carvalho¹,

Dias²,

Bedeschi³

et al. 2013

Journal of Applied Physics

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Section: Resultsmentioning

confidence: 99%

In vitro thermal diffusivity measurements as aging process study in human tooth hard tissues

Carvalho¹,

Dias²,

Bedeschi³

et al. 2013

Journal of Applied Physics

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“…The development and application of noncontact methods for precise displacement measurement technique is of substantial interest for engineers. [25][26][27][28] For biomedical applications, there are often additional technical challenges to overcome that must be considered. This study has illustrated the use of DIC as an optical approach for accurately quantifying the movement of bones in the treatment of pes planus and distal tibiofibular syndesmosis injury.…”

Section: Discussionmentioning

confidence: 99%

Real-time three-dimensional digital image correlation for biomedical applications

Wu¹,

Arola

et al. 2016

J. Biomed. Opt

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Digital image correlation (DIC) has been successfully applied for evaluating the mechanical behavior of biological tissues. A three-dimensional (3-D) DIC system has been developed and applied to examining the motion of bones in the human foot. To achieve accurate, real-time displacement measurements, an algorithm including matching between sequential images and image pairs has been developed. The system was used to monitor the movement of markers which were attached to a precisely motorized stage. The accuracy of the proposed technique for in-plane and out-of-plane measurements was found to be ?0.25% and 1.17%, respectively. Two biomedical applications were presented. In the experiment involving the foot arch, a human cadaver lower leg and foot specimen were subjected to vertical compressive loads up to 700 N at a rate of 10??N/s and the 3-D motions of bones in the foot were monitored in real time. In the experiment involving distal tibio fibular syndesmosis, a human cadaver lower leg and foot specimen were subjected to a monotonic rotational torque up to 5 Nm at a speed of 5 deg per min and the relative displacements of the tibia and fibula were monitored in real time. Results showed that the system could reach a frequency of up to 16 Hz with 6 points measured simultaneously. This technique sheds new lights on measuring 3-D motion of bones in biomechanical studies.

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“…As this technique is a post analysis method on fragments, it cannot be used to track the crack growth while loading. Previous studies have shown that digital image correlation (DIC) could be used to identify deformation and crack growth in sliced tooth‐like specimens, compare strain distributions within the surrounding bone of implant‐supported crowns, and measure the dehydration shrinkage of dental materials and polymerization shrinkage of light‐cured dental composites . The combination of these two methods could help our understanding of the fracture mechanism of dental materials.…”

mentioning

confidence: 99%

Plastic Damage Induced Fracture Behaviors of Dental Ceramic Layer Structures Subjected to Monotonic Load

Wang

Lu²,

Arola

et al. 2013

Journal of Prosthodontics

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Purpose: The aim of this study was to compare failure modes and fracture strength of ceramic structures using a combination of experimental and numerical methods. Materials and Methods: Twelve specimens with flat layer structures were fabricated from two types of ceramic systems (IPS e.max ceram/e.max press-CP and Vita VM9/Lava zirconia-VZ) and subjected to monotonic load to fracture with a tungsten carbide sphere. Digital image correlation (DIC) and fractography technology were used to analyze fracture behaviors of specimens. Numerical simulation was also applied to analyze the stress distribution in these two types of dental ceramics. Results: Quasi-plastic damage occurred beneath the indenter in porcelain in all cases. In general, the fracture strength of VZ specimens was greater than that of CP specimens. The crack initiation loads of VZ and CP were determined as 958 ± 50 N and 724 ± 36 N, respectively. Cracks were induced by plastic damage and were subsequently driven by tensile stress at the elastic/plastic boundary and extended downward toward to the veneer/core interface from the observation of DIC at the specimen surface. Cracks penetrated into e.max press core, which led to a serious bulk fracture in CP crowns, while in VZ specimens, cracks were deflected and extended along the porcelain/zirconia core interface without penetration into the zirconia core. The rupture loads for VZ and CP ceramics were determined as 1150 ± 170 N and 857 ± 66 N, respectively. Conclusions: Quasi-plastic deformation (damage) is responsible for crack initiation within porcelain in both types of crowns. Due to the intrinsic mechanical properties, the fracture behaviors of these two types of ceramics are different. The zirconia core with high strength and high elastic modulus has better resistance to fracture than the e.max core.All-ceramic crowns have become increasingly popular due to their improved esthetics and biocompatibility in comparison to traditional metal-ceramic restorations.

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Importance of aging to dehydration shrinkage of human dentin

Cited by 7 publications

References 34 publications

In vitro thermal diffusivity measurements as aging process study in human tooth hard tissues

In vitro thermal diffusivity measurements as aging process study in human tooth hard tissues

Real-time three-dimensional digital image correlation for biomedical applications

Plastic Damage Induced Fracture Behaviors of Dental Ceramic Layer Structures Subjected to Monotonic Load

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