[Table/Fig-8]:
Comparison of dimensional accuracy of group II casts (molar site) with master model using three types of impression trays.
| Group I | Group II | Molar | ||||
|---|---|---|---|---|---|---|
| Bucco-lingual | Mesio-distal | |||||
| Mean ± SD | Difference | Mean ± SD | Difference | |||
| Group II Heavy +Light Body |
IIA Metal Dual Arch |
Mean ± SD % difference P value |
6.868± 0.026 - - |
0.019± 0.026 0.3% 0.04, S |
8.726± 0.16 - - |
0.013± 0.16 0.2% 0.03, S |
| IIB Plastic Dual Arch |
Mean ± SD % difference P value |
6.821± 0.067 - - |
0.066± 0.067 1% 0.01, S |
8.691± 0.047 - - |
0.048± 0.047 0.5% 0.01, S |
|
| IIC Custom Tray |
Mean ± SD % difference P value |
6.874± 0.021 - - |
0.013± 0.021 0.2% 0.09,NS |
8.728± 0.011 - - |
0.011± 0.011 0.1% 0.01,S |
|
| ANOVA F P |
IIA/IIB/IIC | - | 4.56 0.02,S |
- | 4.92 0.015,S |
|
| (Difference In Accuracy Amongst Various Tray Groups) | IIA-IIB IIA-IIC IIB-IIC |
- - - |
0.05,S 0.95,NS 0.03,S |
- - - |
0.03,S 0.99,NS 0.02,S |
|
*Anova test