Tooth Mobility Reproduction in Dental Material Research: A Scoping Review

Ang, Yee; Razali, Masfueh; Yahaya, Norziha

doi:10.2174/1874210602014010465

Cited by 3 publications

(7 citation statements)

References 36 publications

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“…A criticism of PDL-incorporating models has been the lack of control over the dimensions of the artificial PDL layer, 15,16 a factor in the mechanical environment. 17 The relatively simple design and specimen assembly in this study address the PDL-space dimension issues.…”

Section: F I G U R E 1 (Continued)mentioning

confidence: 99%

“…To the best of our knowledge, this is the first occlusion experiment in which a PDL-matched analogue is precision integrated into an established occlusion model with controlled realistic occlusal surface -occlusal surface contact loading. PDL analogues, typically dental impression or reline materials, 15,16,18 have been evaluated for applicability and incorporated into experiments with unnatural opposing contacts such as 6-mm-diameter ceramic and 8-mm-diameter stainless steel indenters. 19 Not only do non-tooth antagonists (the spherical indenters, for example) define, and simplify, the geometry of the occlusal contact interactions, but the ceramic vs. the stainless steel indenters also differ in their associated contact friction forces.…”

Section: F I G U R E 1 (Continued)mentioning

confidence: 99%

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The effects of a periodontal ligament analogue on occlusal contact forces

deMoya¹,

Schmidt

Eckert

et al. 2021

J of Oral Rehabilitation

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With structural and physiological functions, the periodontal ligament (PDL) is a complex component of the periodontium. It maintains the tooth in its equilibrium position and provides support within its bony socket. Additionally, the PDL is involved in tooth eruption and migration, orthodontic treatment-associated bone remodelling and root resorption, and the healing processes of disease and trauma. Despite wide-ranging studies, many of its biological and structural functions and characteristics remain poorly understood. As a load-bearing structure, the PDL's complexity derives from its anisotropy, as it consists of discrete components and functional elements, namely the matrix and the reinforcing principal fibers. 1,2 Moreover, as are most biological tissues, the PDL is characterised as a viscoelastic (VE) material. 3,4 Viscoelastic materials exhibit time-dependent mechanical behaviours, with 'creep' and 'recovery' specifically relevant to this study. Typically, while a constant force is applied to a VE material, it tends to continuously deform (creep). After the force is removed, the material tends to return towards its original dimensions (recovery) (https://polym erdat abase.com). In contrast, metals, for example, categorised as elastic-plastic materials, do not possess time-dependent features. Note that this is not a study of viscoelasticity, per se; rather, it is about its expression in the mechanical environment of occlusal contacts.This study represents the evolution of bench-top research in which the forces experienced by paired occluding (denture, ceramic and stainless steel) molars and full dentiform arches were measured. [5][6][7][8] In those studies, the teeth were rigidly attached (i.e.

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Section: F I G U R E 1 (Continued)mentioning

confidence: 99%

Section: F I G U R E 1 (Continued)mentioning

confidence: 99%

The effects of a periodontal ligament analogue on occlusal contact forces

deMoya¹,

Schmidt

Eckert

et al. 2021

J of Oral Rehabilitation

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show abstract

“…Although the complexity of tooth biomechanics and the variability of the oral cavity environment cannot be completely simulated, various methods of restoring the periodontal ligament have been described in the literature in order to take into account the resilience of PDL in mechanical tests [ 48 ] and bring the in vitro measurements closer to the clinical situation. The most commonly used approach is to create a layer of elastic material around the root of the tooth using silicone or polyether materials [ 49 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Abutment Rigidity on the Wear Resistance of a Lithium Disilicate Glass Ceramic: An In Vitro Study

Kosewski¹,

Angelis

Sorrentino

et al. 2023

JFB

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Lithium disilicate (LDS) glass ceramics are among the most common biomaterials in conservative dentistry and prosthodontics, and their wear behavior is of paramount clinical interest. An innovative in vitro model is presented, which employs CAD/CAM technology to simulate the periodontal ligament and alveolar bone. The model aims to evaluate the effect of the abutment rigidity on the wear resistance of the LDS glass ceramic. Two experimental groups (LDS restorations supported by dental implants, named LDS-on-Implant, or by hybrid ceramic tooth replicas with artificial periodontal ligament, named LDS-on-Tooth-Replica) and a control group (LDS-Cylinders) were compared. Fifteen samples (n = 15) were fabricated for each group and subjected to testing, with LDS antagonistic cusps opposing them over 120,000 cycles using a dual axis chewing simulator. Wear resistance was analyzed by measuring the vertical wear depth (mm) and the volume loss (mm3) on each LDS sample, as well as the linear antagonist wear (mm) on LDS cusps. Mean values were calculated for LDS-Cylinders (0.186 mm, 0.322 mm3, 0.220 mm, respectively), LDS-on-Implant (0.128 mm, 0.166 mm3, 0.199 mm, respectively), and LDS-on-Tooth-Replica (0.098 mm, 0.107 mm3, 0.172 mm, respectively) and compared using one-way-ANOVA and Tukey’s tests. The level of significance was set at 0.05 in all tests. Wear facets were inspected under a scanning electron microscope. Data analysis revealed that abutment rigidity was able to significantly affect the wear pattern of LDS, which seems to be more intense on rigid implant-abutment supports compared to resilient teeth replicas with artificial periodontal ligament.

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“…Simulating the mechanical behaviour of the periodontal ligament (PDL) is particularly challenging, but is mandatory since rigidly fixed teeth can bias the results in an in vitro model [ 1 , 2 ]. Several efforts have been made to simulate natural tooth mobility in in vitro models, including techniques like socket enlargement, screw loosening, and simulation of alveolar bone loss [ 3 ]. Of these techniques, socket enlargement has been reported the most [ 1 , 4 – 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…To overcome this problem, other models have reduced the artificial bone height to adjust tooth mobility [ 6 , 9 – 14 ]. However, this has unpredictable and irreproducible outcomes [ 3 ]. This is also true for the screw loosening technique, which adjusts tooth mobility by loosening screws that hold the tooth in its socket [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

A new CAD/CAM tooth mobility simulating model for dental in vitro investigations

et al. 2023

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Objectives To validate a new tooth mobility simulating in vitro model for biomechanical tests of dental appliances and restorations. Material and methods Load-deflection curves for teeth in CAD/CAM models (n = 10/group, 6 teeth/model) of the anterior segment of a lower jaw with either low tooth mobility (LM) or high tooth mobility (HM) were recorded with a universal testing device and a Periotest device. All teeth were tested before and after different ageing protocols. Finally, vertical load capacity (Fmax) was tested in all teeth. Results At F = 100 N load, vertical/horizontal tooth deflections before ageing were 80 ± 10 µm/400 ± 40 µm for LM models and 130 ± 20 µm/610 ± 100 µm for HM models. Periotest values were 1.6 ± 1.4 for LM models and 5.5 ± 1.5 for HM models. These values were within the range of physiological tooth mobility. No visible damage occurred during ageing and simulated ageing had no significant effect on tooth mobility. Fmax values were 494 ± 67 N (LM) and 388 ± 95 N (HM). Conclusion The model is practical, easy to manufacture and can reliably simulate tooth mobility. The model was also validated for long-term testing, so is suitable for investigating various dental appliances and restorations such as retainers, brackets, dental bridges or trauma splints. Clinical relevance Using this in-vitro model for high standardised investigations of various dental appliances and restorations can protect patients from unnecessary burdens in trials and practice.

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Tooth Mobility Reproduction in Dental Material Research: A Scoping Review

Cited by 3 publications

References 36 publications

The effects of a periodontal ligament analogue on occlusal contact forces

The effects of a periodontal ligament analogue on occlusal contact forces

Effect of the Abutment Rigidity on the Wear Resistance of a Lithium Disilicate Glass Ceramic: An In Vitro Study

A new CAD/CAM tooth mobility simulating model for dental in vitro investigations

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