PURPOSE: This study evaluated the effect of anchorage on the accuracy of fit in removable partial denture framework. MATERIALS AND METHODS: Twenty-four partially edentulous maxillary refractory casts were duplicated from a machine-milled metal cast. Twelve of these were included in the test group, which had the provision for anchorage in the refractory cast, and the remaining 12 were taken as control group, which did not have provision for anchorage. Identical wax patterns for the maxillary strap major connector were invested and cast in cobalt chromium alloy. The accuracy of fit of the cast partial major connector frameworks were measured at two selected points using a profile projector. The resultant data were analyzed using student's t-test and unpaired t-test. RESULTS: Student's t-test showed statistically significant improvement in the fit of the major connectors of the test group at point A (p= 0.0003) and P (p= 0.0074). Unpaired t-test was performed for the control and test group. The results of the unpaired t-test for the control group exhibited a greater gap discrepancy (0.44 +/- 0.20 mm) than for the test group at point A (0.16 +/- 0.10 mm). Similarly, the gap was more at Point P for the specimens in the control group (0.65 +/- 0.10 mm) than the test group (0.42 +/- 0.24 mm). CONCLUSION: Within the limitations of the study it is concluded that the accuracy of fit of the palatal major connector was significantly better in the test group than the control group, with 0.1% level of significance at point P. The accuracy was significantly improved in both groups at point A by 1% level of confidence.
PURPOSE: This study evaluated the effect of anchorage on the accuracy of fit in removable partial denture framework. MATERIALS AND METHODS: Twenty-four partially edentulous maxillary refractory casts were duplicated from a machine-milled metal cast. Twelve of these were included in the test group, which had the provision for anchorage in the refractory cast, and the remaining 12 were taken as control group, which did not have provision for anchorage. Identical wax patterns for the maxillary strap major connector were invested and cast in cobalt chromium alloy. The accuracy of fit of the cast partial major connector frameworks were measured at two selected points using a profile projector. The resultant data were analyzed using student's t-test and unpaired t-test. RESULTS: Student's t-test showed statistically significant improvement in the fit of the major connectors of the test group at point A (p= 0.0003) and P (p= 0.0074). Unpaired t-test was performed for the control and test group. The results of the unpaired t-test for the control group exhibited a greater gap discrepancy (0.44 +/- 0.20 mm) than for the test group at point A (0.16 +/- 0.10 mm). Similarly, the gap was more at Point P for the specimens in the control group (0.65 +/- 0.10 mm) than the test group (0.42 +/- 0.24 mm). CONCLUSION: Within the limitations of the study it is concluded that the accuracy of fit of the palatal major connector was significantly better in the test group than the control group, with 0.1% level of significance at point P. The accuracy was significantly improved in both groups at point A by 1% level of confidence.