PMID- 2489481
OWN - NLM
STAT- MEDLINE
DCOM- 19910610
LR  - 20061115
IS  - 0044-6912 (Print)
IS  - 0044-6912 (Linking)
VI  - 27
IP  - 4
DP  - 1989 Dec
TI  - [Molar size sequence in seven species of Cercopithecidae].
PG  - 925-64
AB  - The size sequence of the molar teeth in three genera, including seven species, of 
      the Cercopithecidae was examined on the basis of mesiodistal and buccolingual 
      crown diameters, and rectangle measurements (mesiodistal d. X buccolingual d.). 
      The determination of molar size order was estimated by the three methods of mean 
      values, size sequences and reductive indices (M2/M1, M3/M1). The results obtained 
      are summarized as follows: 1. The molar size sequence of the seven species. The 
      pattern of sequence in the molars of the Cercopithecidae was divided into six 
      types: (I) M1 less than M2 less than M3 or (M1M2) less than M3, (II) M1 less than 
      (M2M3), (III) M1 less than M3 less than M2, (IV) (M1M2M3), (V) (M3M1) less than 
      M2, and (VI) M3 less than M1 less than M2 or M3 less than (M1M2). 2. The upper 
      molars. i) The most frequent pattern of mean values found was type II for all the 
      species of the Macaca and Colobus. The two species of Cercopithecus showed 
      predominantly the characteristics of types III, IV and V. ii) The molar size 
      sequence individual data revealed that in the mesiodistal crown diameter types I 
      and II were distributed frequently in the Macaca, types IV and V in the Colobus, 
      and type VI in the Cercopithecus. The reduction of the third molar, therefore, 
      seemed to be more pronounced in the Cercopithecus when compared with the other 
      two genus, Macaca and Colobus, because type VI is the type with more size 
      reduction in the third molar. In the case of the buccolingual crown diameters, 
      the most common size sequences were found in types II and III for the Macaca and 
      Colobus. In the Cercopithecus, however, type V exceeded other types in frequence. 
      iii) The results of the reductive indices showed that the second molars in the 
      Colobus were greatly reduced compared to the first, followed by those of the 
      Cercopithecus and Macaca. In the third molar reduction, the Cercopithecus had a 
      relatively small third molar compared to the first, following the Colobus and 
      Macaca. 3. The lower molars. i) The pattern in the mean values were frequently 
      found to be type I for the Macaca and Colobus, and types III and II for the 
      Cercopithecus. ii) The size sequence in the frequency of the mesiodistal crown 
      diameter was well presented in type I for the Macaca and Colobus, while types IV 
      and V were distributed frequently for Cercopithecus in which the reduction of the 
      third molar was noticeable.(ABSTRACT TRUNCATED AT 400 WORDS)
FAU - Takada, S
AU  - Takada S
LA  - jpn
PT  - Comparative Study
PT  - English Abstract
PT  - Journal Article
PL  - Japan
TA  - Aichi Gakuin Daigaku Shigakkai Shi
JT  - Aichi Gakuin Daigaku Shigakkai shi
JID - 7501066
MH  - Animals
MH  - Cercopithecidae/*anatomy & histology
MH  - Cercopithecus
MH  - Colobus
MH  - Macaca
MH  - Molar/*anatomy & histology
MH  - Odontometry
EDAT- 1989/12/01 00:00
MHDA- 1989/12/01 00:01
CRDT- 1989/12/01 00:00
PHST- 1989/12/01 00:00 [pubmed]
PHST- 1989/12/01 00:01 [medline]
PHST- 1989/12/01 00:00 [entrez]
PST - ppublish
SO  - Aichi Gakuin Daigaku Shigakkai Shi. 1989 Dec;27(4):925-64.