Contact ratio and adaptations in the maxillary and mandibular dentoalveolar joints in rats and human clinical analogs

Wang, B.; Nguyen, Nam P.; Kang, Misun; Srirangapatanam, Sudarshan; Connelly, Stephen; Souza, Richard Demo; Ho, Sunita P.

doi:10.1016/j.jmbbm.2022.105485

Cited by 2 publications

(2 citation statements)

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“…Micro-computed tomography (CT), micro-Xray CT, and synchrotron X-ray microtomography imaging of tooth and bone during loading has provided invaluable information concerning the mobility of the tooth root, regional differences in PDL width, and tissue interactions (Bemmann et al, 2021;Ben-Zvi et al, 2019;Chattah et al, 2009Chattah et al, , 2011Jang et al, 2021). Finite element modeling and digital volume correlation have also provided important insights into the strains occurring within the periodontium (Jang et al, 2021;Natali et al, 2007;Wang et al, 2022). These methods are typically performed with ex vivo tissue and the specimen size and resolution of geometry may be limited by the imaging methodology.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have isolated sections of the tooth–PDL–bone complex (TPBC) for mechanical testing (Komatsu et al, 2007; Toms et al, 2002); however, the deformation of the ligament in the context of the alveolus has been more difficult to study. Challenges include the PDL's small size and remote location between the tooth root and the alveolar bone, as well as the complex three‐dimensional (3D) morphology of the root within the alveolus (Wang et al, 2022). Preservation of the 3D relationship between the TPBC is essential, to understand how tooth loads are transferred through the PDL to bone and the activation of periodontal mechanoreceptors during loading.…”

Section: Introductionmentioning

confidence: 99%

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In vivo measurement of strain in the periodontal space of pig (Sus scrofa) incisors using in‐fiber Bragg sensors

Popowics,

Hwang,

et al. 2024

Journal of Morphology

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The incisor teeth in pigs, Sus scrofa, function in association with a disc‐shaped snout to explore the environment for potential food. Understanding how mechanical loading applied to the tooth deforms the periodontal ligament (PDL) is important to determining the role of periodontal mechanoreceptors during food exploration and feeding. The objective of this study was to use fiber Bragg (FBG) sensors to measure strain in vivo within the PDL space of pig incisors. The central mandibular incisors of pigs underwent spring loaded lingual tipping during FBG strain recording within the labial periodontal space. FBG sensors were placed within the periodontal space of the central mandibular incisors of ~2–3‐month‐old farm pigs. The magnitude and orientation of spring loads are expected to mimic incisor contact with food. During incisor tipping with load calibrated springs, FBG strains in vitro (N = 6) and in vivo (N = 6) recorded at comparable load levels overlapped in range (−10–20 με). Linear regressions between peak FBG strains, that is, the highest recorded strain value, and baseline strains, that is, strain without applied spring load, were significant across all in vivo experiments (peak strain at 200 g vs. baseline, p = .04; peak strain at 2000 g vs. baseline p = .03; peak strain at 2000 g vs. 200 g, p = .004). These linear relationships indicate that on a per experiment basis, the maximum measured strain at different spring loads showed predictable differences. A Friedman test of the absolute value of peak strain confirmed the significant increase in strain between baseline, 200 g, and 2000 g spring activation (p = .02). Mainly compressive strains were recorded in the labial PDL space and increases in spring load applied in vivo generated increases in FBG strain measurements. These results demonstrate the capacity for FBG sensors to be used in vivo to assess transmission of occlusal loads through the periodontium. PDL strain is associated with mechanoreceptor stimulation and is expected to affect the functional morphology of the incisors. The overall low levels of strain observed may correspond with the robust functional morphology of pig incisors and the tendency for pigs to encounter diverse foods and substrates during food exploration.

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