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Difference between revisions of "Jaw movements analysis. Part 1: Electrognathographic Replicator"
Jaw movements analysis. Part 1: Electrognathographic Replicator (view source)
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We begin by noting that previous studies have made attempts to represent mandibular movement in various ways<ref>Bates JF, Stafford GD, Harrison A: Masticatory function. A review of the literature (I). The form of the masticatory cycle. J Oral Rehabil 1975; 2: 281.</ref><ref>Hannam AG: Mastication in man, in Bryant P, Gale E, Rugh J (eds): Oral Motor Behaviours: Impact on Oral Conditions and Dental Treatment. Washington DC, National Institutes of Health, 1979.</ref>, although all systems used have their limitations. The following factors must be considered: | We begin by noting that previous studies have made attempts to represent mandibular movement in various ways<ref>Bates JF, Stafford GD, Harrison A: Masticatory function. A review of the literature (I). The form of the masticatory cycle. J Oral Rehabil 1975; 2: 281.</ref><ref>Hannam AG: Mastication in man, in Bryant P, Gale E, Rugh J (eds): Oral Motor Behaviours: Impact on Oral Conditions and Dental Treatment. Washington DC, National Institutes of Health, 1979.</ref>, although all systems used have their limitations. The following factors must be considered: | ||
#The six degrees of freedom required to represent the three dimensions of movement<ref>Gillings BRO, Graham CH, Duckmanton NA: Jaw movements in young adult men during chewing. J Prosthet Dent 1973; 29: 616.</ref><ref>Goodson JM, Johansen E: Analysis of human mandibular movement, in Myers HM (ed): Monographs in Oral Science. New York, S. Karger, 1975, vol 5.</ref><ref>Lemmer J, Lewin A, van Rensburg LV: The measurement of jaw movement. Part I. J Prosthet Dent 1976; 36: 211.</ref>; | #The six degrees of freedom{{Tooltip|six degrees of freedom|i libertà e così via. Queste considerazioni si possono estendere ai sistemi di | ||
n | |||
{\displaystyle n} punti materiali: se tutti i punti sono liberi di muoversi nello spazio, il sistema avrà | |||
f | |||
{\displaystyle 3n-f}.}} required to represent the three dimensions of movement<ref>Gillings BRO, Graham CH, Duckmanton NA: Jaw movements in young adult men during chewing. J Prosthet Dent 1973; 29: 616.</ref><ref>Goodson JM, Johansen E: Analysis of human mandibular movement, in Myers HM (ed): Monographs in Oral Science. New York, S. Karger, 1975, vol 5.</ref><ref>Lemmer J, Lewin A, van Rensburg LV: The measurement of jaw movement. Part I. J Prosthet Dent 1976; 36: 211.</ref>; | |||
#Non-invasiveness, to minimize intraoral disturbance; | #Non-invasiveness, to minimize intraoral disturbance; | ||
#Linearity of the output signal<ref>Hannam AG, De Cou RE, Wood WW: The kinesiographic measurement of jaw displacement. J Prosthet Dent 1980; 44: 88-93.</ref>. | #Linearity of the output signal<ref>Hannam AG, De Cou RE, Wood WW: The kinesiographic measurement of jaw displacement. J Prosthet Dent 1980; 44: 88-93.</ref>. | ||