vd NN NIIS NS on eye glasses 
AN NEN ENIM p on Upper denture 
on lower denture 
on the mentum 
10.0 mm | 
Before eliminationg head movements 1.6 sec 
on eye glasses 
  
INN NT NTN 
on upper denture 
on lower denture 
on the mentum 
10.0 | 
mm 
After eliminating head movements 1.0 sec 
Fig. 4 Loca of the targets before and after eliminating 
head movements. 
Mastication 
Side 
Test Food 
e de 
Fig. 5 Division of the path of closure of the mandible 
370 
  
Fig. 6 Relation of the location between the lower 
dentures and the mandible. 
The upward arrows were used to denote normal vectors of each 
plane, and the sideways arrows were used to denote I-vector 
and M-vector. 
upper denture E^ 
vertical mov. AT | } 
| 
VA d 
upper denture xd 
| 
lateral mov. 
| 
| 
the menton 
vertical mov. 
1 mastication cycle 
Fig. 7 Measuring method of the amount of the denture 
mobility. 
A: start point of the measurement. d: amount of the movement. 
One mastication cycle was defined as the duration from 
maximum opening to next one. 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B5. Vienna 1996 
  
the oppo: 
functions, 
masticatio 
3.2 Mand 
The mand 
the fronta 
denture b 
stroke (th 
masticatio 
closure W: 
3.3 Data ' 
The trans 
targets W 
mesioling 
incisal pc 
dentures(] 
The pl 
denture w 
centroid : 
centroid 
occlusal p 
were defi 
to the mai 
the base c 
The ve 
defined a 
was defin 
3.4 Meas 
The amo 
incisal p 
beginning 
displacen 
movemen 
the basis 
denture b 
The 
movemen 
And then 
relation tc 
We in 
following 
1. Pitcl 
project to 
M-vector. 
vector of 
investiga! 
2. Roll 
plane cor 
angles, ar 
of MP an 
3. Rot: 
MP, and