Influence of Palatal Form and Denture Base Thickness on the Strength of Maxillary Denture Bases: An In-Vitro Study Gupta Ranjan1, Vasudeva Kamlesh2,*, Duggal Nidhi3, Mahajan Kanika4 1Assistant Professor, HP Govt Dental College, Shimla, HP 2Ex Principal GDC, Patiala, Punjab, India 3Associate Professor, Govt Dental College, Patiala, Punjab 4BDS. Private Practitioner, Inder Dental Clinic, Sanjauli, Shimla *Address for Correspondence: Dr. Kamlesh Vasudeva, Ex Principal GDC, Patiala, Punjab, India, E mail: kamleshv50@yahoo.com
Online published on 16 July, 2018. Abstract Purpose Fracture of acrylic complete denture poses a challenge to the clinician and remains an unresolved problem. It is characterized by midline fracture in maxillary denture. Among the various factors, effect of the shape of the underlying palate and thickness of the acrylic base on the mechanical strength of denture bases was assessed in this study. Materials and Methods The study was conducted on 48 specimens (casts), comprising of three groups. 16 specimens were made in high palate, 16 in medium and remaining 16 in shallow palate. On eight casts from each palatal form, denture bases were fabricated with half the thickness from rest eight. The fracture test were carried out to calculate the strength of denture bases using Instron universal testing machine and the results were put to statistical analysis. Results Medium palate denture bases showed maximum strength, followed by high palate and then shallow plate denture bases. Increase in thickness increased the strength of denture bases with maximum increase was observed in high palate and minimum increase was seen in shallow palate denture bases. Conclusion The present study seems to suggest increasing the bulk of material in regions subject to deformation and fracture. The use of thinner metal palates and reinforced acrylic resin denture base materials can be indicated in case of shallow palate dentures, in gaggers. Top Keywords Palatal form, thermoplastic resin sheets, strength. Top |