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. 2024 May 9;24:543. doi: 10.1186/s12903-024-04310-w

Table 5.

Distribution of left maxillary 1st and 2nd premolars concerning age

Classification Left Max 1st PM Left Max 2nd PM
AGE P-value AGE P-value
10-20 21-30 31-40 41-50 51-60 60+ 10-20 21-30 31-40 41-50 51-60 60+
1 MPM 1 1 3 3 0 1 0 13 23 16 9 7 5
2 MPM 1 B 1 L 1 17 41 47 20 14 15 5 16 14 4 3 3
3 MPM MB 1 DB 1 L 1 0 2 0 0 0 0 0 1 1 0 0 0
1 MPM 2-1 0 1 0 0 0 0 0 0 1 1 0 0
1 MPM 1-2-1 0 1 2 0 2 1 0.053 2 13 13 11 9 4 0.002*
1 MPM 2-2 3 7 5 5 3 3 0 3 1 0 1 1
1 MPM 1-2 0 3 1 1 1 3 0 0 1 2 0 0
1 MPM 2-1-2 0 2 1 0 1 0 0 0 1 0 0 0
Total 21 60 59 26 22 22 20 56 48 27 20 13

*Significant value <0.05; Chi-square test, MPM and Max PM- Maxillary Premolar