BAB II MATERIAL AND METHOD
The research study is survey descriptive analytic. Hominid fossils are collection of Centre Of Research And Development of Geology PPPG Bandung.
For modern men Homo sapien are pre-clinic students of Faculty of Dentistry Padjadjaran University.
The population of modern men is 375 students that fulfill the subject sample criterion, and sample is 38 random students. Pre-historic men fossil sample is 6
specimens, collection of PPPG Bandung are: 1. Pithecanthropus c Pc Sartono, 1961; Aziz, 2001
2. Pithecanthropus e Pe Sartono, 1996 3. Pithecanthropus f Pff Aziz, 2001
4. Fragment of Right mandible Bk 7905 Aziz, 1983 5. Fragment of Right mandible Sb 8103 Aziz, 1981
6. Fragment of Right mandible Ng 8503 Aziz et al., 1994
FKG Unpad student criterions are: 1. Men or women age between 17-24 years
2. First and second molar already erupted, and not missing 3. Groove pattern and number of bulges can be observed
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Observation was done at gypsum stone model of each subject sample which was made through alginate impression material.
Observed variables are: 1. Groove pattern of lower jaw first molar of FKG Unpad student
2. Groove pattern of lower jaw second molar of FKG Unpad student 3. Groove pattern of lower jaw third molar of FKG Unpad student
4. Groove pattern of lower jaw first molar of pre-historic men fossil 5. Groove pattern of lower jaw second molar of pre-historic men fossil
6. Groove pattern of lower jaw third molar of pre-historic men fossil
BAB III RESULT
Groove pattern of lower jaw first molar of FKG Unpad student is +5 pattern. And so do at pre-historic men Table 1.
Table 1. Molar Groove pattern of FKG Unpad Students and Pre-historic Men
GROOVE PATTERN Independent
Variable Lower
Molar Y5
+5 Y4
+4 Y3
+6 Molar 1
60,53 7,89
5,26 Molar 2
34,21 63,16
2,63 FKG Unpad
Student Molar 3
13,16 2,63
2,63 Molar 1
33,33 66,67
Molar 2 14,29
85,71 Pre-histiric
Men Molar 3
100
For lower jaw second molar, the most pattern for student FKG Unpad is +4 pattern, while at pre-historic men is Y5 pattern. Lower jaw third molar of FKG
Unpad student which is can be observed which has already erupted is + 5 pattern, while at pre-historic men entirely has Y5 pattern with more complicated wrinkle
Tabel 1.
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Chi-suare statistic test result of Groove pattern of lower first molar, second, and third molars between FKG Unpad Students and Pre-historic men Tables 2 are:
1. There is no difference of lower jaw first molar Groove pattern between pre- historic men and FKG Unpad student
2. There is difference of lower jaw second molar Groove pattern between pre- historic men and FKG Unpad student
3. There is difference of lower jaw third molar Groove pattern between pre- historic men and FKG Unpad student
Table 2. Chi-Square Test Result of Molar Groove Pattern between FKG Unpad Students and Pre-historic Men
Groove Pattern X
2
X
2
table
Molar 1 0,46
7,81 not significant
Molar 2 36,12
7,81 significant
Molar 3 10,00
7,81 significant
BAB IV DISCUSSION
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