## 4 Discussion  
With respect to their impact on dimensional changes, there was a significant interaction between the components, i.e., the posterior tooth forms and processing techniques applied. The statistical analysis revealed that the results were rather pronounced, with the injection molding technique exhibiting fewer changes during the transition between the waxing stage and post-processing. Another observed pattern was that the non-anatomic teeth \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multicolumn{1}{c}{**Source**} & \multicolumn{3}{c}{**Type III Sum**} & \multirow{2}{*}{**df**} & \multirow{2}{*}{**Mean Square**} & \multirow{2}{*}{**F**} & \multirow{2}{*}{**Sig.**} \\ \cline{3-3} \cline{6-7}  & & **of Squares** & & & & & \\ \hline \multirow{2}{*}{Intercept} & Hypothesis & 26.045 & 1 & 26.045 & 25.969 & 0.001 \\  & Error & 9.372 & 8.940 & 1.048 * & & & \\ \multirow{2}{*}{Tooth form} & Hypothesis & 17.056 & 1 & 17.056 & 24.104 & 0.000 \\  & Error & 117.437 & 176 & 0.660 & & & \\ \multirow{2}{*}{Processing technique} & Hypothesis & 5.908 & 2 & 2.954 & 5.689 & 0.001 \\  & Error & 117.437 & 176 & 0.660 & & & \\ \hline \hline \end{tabular}  
* Dependent variable: dimensional change;
* 167 MS (technique) + 0.833 MS (error);
* MS (error).  
\end{table} 
Table 3: Two-way ANOVA comparing the tooth forms and processing techniques. positional change was less than that for the semi-anatomic teeth, regardless of the dimension examined and the processing technique used. The outcomes of the study revealed that changes in the positions of the molar were the highest in the horizontal dimension as compared to other dimensions tested for all the groups, when semi-anatomic teeth were processed using the conventional molding technique. However, the smallest differences were observed in the non-anatomic group, when the injection processing technique was used. The significant positional changes in semi-anatomic teeth can be explained by the complex interlock between the denture teeth and the investment material, which may create excessive stresses during acrylic polymerization that lead to significant teeth movement. The results of this study negate the proposed null hypothesis. In the annals of contemporary dentistry, the introduction of acrylic resins in 1937 was a watershed moment. Their adoption and acknowledgment in prosthodonics are quite remarkable, as they are proven to be more esthetic and simpler to manipulate to be used in the laboratory as well as in clinics [18]. Methacrylates, particularly methyl methacrylate (MMA) acrylic resin, have been used in dentistry as a denture foundation material since their inception and have been widely employed, since they are regarded as suitable substances for use in the oral environment [19; 20]. Recently, the usage of pour-type (fluid) resins in the manufacturing of denture bases has expanded dramatically [21]. The dimensional shift that happens during polymerization shrinkage is crucial to the preservation and stability of the complete denture [22]. The movement of teeth occurs during and after the production of complete dentures, according to research published in the literature [9; 23]. A careful understanding and consideration of this may allow for the creation of functioning complete dentures, which require fewer occlusal modifications on the articulator and minimal corrections in the patient's mouth. Previous research has found that the highest amount of tooth movement occurs in the posterior teeth [24]; however, this study found that the maximal teeth movement occurs solely in the compression molding semi-anatomic teeth group for this study and also for the molar teeth. Final measurements were performed after the dentures were recovered from flasking but without removal from the casts. The observed dimensional changes were greater, as the dentures were not immersed in water, as suggested previously in the literature [24].