Posterior and anterior components of force during bite loading

Vardimon, Alexander D.; Beckmann, S.; Shpack, Nir; Sarne, Ofer; Brosh, Tamar

doi:10.1016/j.jbiomech.2006.03.009

Cited by 21 publications

(25 citation statements)

References 34 publications

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“…Our study population showed considerable variability in PAF size. Our finding, that the PAF area increases in the anteroposterior direction, can be related to the high magnitude of force exerted on the posterior teeth during mastication and agrees with previous results .…”

Section: Discussionsupporting

confidence: 93%

Proximal attrition facets: morphometric, demographic, and aging characteristics

Sarig

Hershkovitz

Shvalb

et al. 2014

European J Oral Sciences

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Although interproximal attrition is considered to be limited in modern populations, it has important clinical implications. However, in contrast to occlusal attrition, proximal attrition receives limited scientific attention. The main purpose of the current study was to fill this void. Seven-hundred and sixty-five teeth were collected from 255 skulls of subjects 18-75 yr of age. For each individual, three mandibular teeth (the first and second premolars and the first molar) were examined for proximal attrition facets (PAFs). The results provide detailed information on the size, shape, and location of the facets according to age cohort, gender, and ethnicity. The validity of the method used to measure the facets was also examined. The major findings were as follows: PAFs are usually located on the upper half of the crown proximal aspect; in each tooth, the mesial facet is more lingually positioned and the distal facet is more buccally positioned; the majority of the facets are subrectangular in shape; the size of the facets tends to increase in an anteroposterior direction (from premolars to molars); and facet size and location are age- and sex-dependent and ethnicity-independent. It is our recommendation that dentists bear in mind that interproximal attrition is a dynamic, long-term process and needs to be considered in many clinical scenarios.

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Section: Discussionsupporting

confidence: 93%

Proximal attrition facets: morphometric, demographic, and aging characteristics

Sarig

Hershkovitz

Shvalb

et al. 2014

European J Oral Sciences

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“…The tightness of dental contact point (TDCP) device measures the force needed to insert a thin metal strip at the contact point (CP) between adjacent teeth (29, 30). The insertion forces the teeth to tip within PDL, and the measured force provides information regarding the immediate tooth movement as a solid material within the PDL tissue.…”

Section: Introductionmentioning

confidence: 99%

“…Tightness of dental contact point measurements were taken according to a previous protocol (5) using the TDCP device (Fig. 1) (29, 30). In short, this device, by using a tailor‐made load cell incorporated in the device handle, measures the force needed to insert a metal strip with a predetermined thickness through the contact point of two adjacent teeth.…”

mentioning

confidence: 99%

Appropriateness of viscoelastic soft materials as in vitro simulators of the periodontal ligament

Brosh

Porat²,

Vardimon

et al. 2011

Journal of Oral Rehabilitation

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The periodontal ligament is a viscoelastic soft tissue that connects the tooth to the alveolar bone. This tissue should be simulated in numerical as well as in laboratory models. The mechanical properties of this tissue were previously determined ex vivo and in vivo. The aim of the study was to analyse the appropriateness of impression and reline materials used in dentistry to simulate viscoelastic behaviour of the periodontal ligament. Two reline [Durabase (Reliance Dental MFG, Co.) and Soft Liner (GC Corporation)] and two impression [President Plus (Coltene) and Prestige L (Vanini Dental Industry)] materials were examined in recovery and tensile relaxation tests. Recovery: This experiment simulated in vivo test. Roots of a pair of plastic maxillary premolar teeth were covered with each test material and embedded in acryl while maintaining the contact point. A 0·1-mm stainless steel strip, inserted at the contact point and maintained for 10 s, was used to tip the teeth. After removal, the tightness of dental contact point was measured over 30 min by determining the force needed to insert a 0·05-mm metal strip. Tensile relaxation: strips were elongated to 120%, 140% and 160% of their initial length and maintained at that length for 30 min. Two-phase decay function was applied. The results showed that elastic modulus and relaxation behaviour were significantly different between materials. Elastic modulus values were in the same range of those reported in the literature. However, the recovery values and behaviour showed that impression materials, especially President, are the materials of choice for this purpose because they simulated better the in vivo test.

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“…This study was conducted by inserting a 0.1 mm metal spacer between the two mandibular premolars with functioning interproximal contacts at the level of the contact point (CP) and the change over time of the CP tightness after removal of the spacer was measured with a tightness of dental contact point (TDCP) device (Vardimon et al, 2001(Vardimon et al, , 2003(Vardimon et al, , 2007. The spacer was placed for 1 min, and after removal, sequential measurements of contact point tightness were taken using repetitive insertions of the TDCP device (0.05 mm strip thickness) at the same interproximal CP.…”

Section: Mathematical Model Developmentmentioning

confidence: 99%