Abstract
A new impact response method using a fracture of a pencil-lead to produce an excitation pulse is proposed. Impact excitations (rectangular pulse, triangular pulse and half-sine pulse) are strictly given in physical and mathematical definitions and complete solutions to the impact excitations are provided for Noyes' model of the human tooth. When a relatively long triangular pulse is applied to Noyes' model, which can express the physical characteristic of periodontal tissues, a sinusoidal damped vibration of a single degree-of-freedom model is approximately obtained. The acceleration response is characterised by the physical parameters (T, δ and Ao) and mechanical elements (m1, c1 and k) of which a single degree-of-freedom model is composed. By means of this method, the values of the parameters and elements in the cases of healthy maxillary, healthy mandibular and pathological mandibular incisors are obtained. The single degree-of-freedom model can express the high-frequency spectra of Noyes' model. The pathological tooth is characterised by a longer damped time constant and a larger acceleration maximum. This impact response method can effectively be applied to clinical diagnosis in view of the physical parameters and mechanical elements which have been derived.
| Original language | English |
|---|---|
| Pages (from-to) | 260-266 |
| Number of pages | 7 |
| Journal | Medical & Biological Engineering & Computing |
| Volume | 26 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - May 1988 |
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Keywords
- Acceleration response
- Impact response
- Mechanical impedance
- Periodontal tissues
- Single degree-of-freedom model
- Tooth mobility
ASJC Scopus subject areas
- Health Information Management
- Health Informatics
- Biomedical Engineering
- Computer Science Applications
- Computational Theory and Mathematics
Cite this
Impact response of periodontal tissues. / Oka, Hisao; Yamamoto, T.; Kawazoe, T.; Saratani, K.; Hikida, Y.
In: Medical & Biological Engineering & Computing, Vol. 26, No. 3, 05.1988, p. 260-266.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Impact response of periodontal tissues
AU - Oka, Hisao
AU - Yamamoto, T.
AU - Kawazoe, T.
AU - Saratani, K.
AU - Hikida, Y.
PY - 1988/5
Y1 - 1988/5
N2 - A new impact response method using a fracture of a pencil-lead to produce an excitation pulse is proposed. Impact excitations (rectangular pulse, triangular pulse and half-sine pulse) are strictly given in physical and mathematical definitions and complete solutions to the impact excitations are provided for Noyes' model of the human tooth. When a relatively long triangular pulse is applied to Noyes' model, which can express the physical characteristic of periodontal tissues, a sinusoidal damped vibration of a single degree-of-freedom model is approximately obtained. The acceleration response is characterised by the physical parameters (T, δ and Ao) and mechanical elements (m1, c1 and k) of which a single degree-of-freedom model is composed. By means of this method, the values of the parameters and elements in the cases of healthy maxillary, healthy mandibular and pathological mandibular incisors are obtained. The single degree-of-freedom model can express the high-frequency spectra of Noyes' model. The pathological tooth is characterised by a longer damped time constant and a larger acceleration maximum. This impact response method can effectively be applied to clinical diagnosis in view of the physical parameters and mechanical elements which have been derived.
AB - A new impact response method using a fracture of a pencil-lead to produce an excitation pulse is proposed. Impact excitations (rectangular pulse, triangular pulse and half-sine pulse) are strictly given in physical and mathematical definitions and complete solutions to the impact excitations are provided for Noyes' model of the human tooth. When a relatively long triangular pulse is applied to Noyes' model, which can express the physical characteristic of periodontal tissues, a sinusoidal damped vibration of a single degree-of-freedom model is approximately obtained. The acceleration response is characterised by the physical parameters (T, δ and Ao) and mechanical elements (m1, c1 and k) of which a single degree-of-freedom model is composed. By means of this method, the values of the parameters and elements in the cases of healthy maxillary, healthy mandibular and pathological mandibular incisors are obtained. The single degree-of-freedom model can express the high-frequency spectra of Noyes' model. The pathological tooth is characterised by a longer damped time constant and a larger acceleration maximum. This impact response method can effectively be applied to clinical diagnosis in view of the physical parameters and mechanical elements which have been derived.
KW - Acceleration response
KW - Impact response
KW - Mechanical impedance
KW - Periodontal tissues
KW - Single degree-of-freedom model
KW - Tooth mobility
UR - http://www.scopus.com/inward/record.url?scp=0024017457&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0024017457&partnerID=8YFLogxK
U2 - 10.1007/BF02447078
DO - 10.1007/BF02447078
M3 - Article
C2 - 3255014
AN - SCOPUS:0024017457
VL - 26
SP - 260
EP - 266
JO - Medical and Biological Engineering and Computing
JF - Medical and Biological Engineering and Computing
SN - 0140-0118
IS - 3
ER -