الملخص
Introduction: The Retention of the denture is of utmost interest to the retention of the maxillary denture during functional movements. It must maintain contact with the anterior portion of the soft palate, so the available literature states that addition of posterior palatal seal markedly increases the retention of the denture.
Aim of the Study: The aim of this study is to evaluate the effect of using light-cured acrylic to create the posterior palatal seal in maxillary removable complete dentures.
Materials and Methods: The sample included 12 maxillary edentulous patients, ranging in age between 55-71 years.
Two maxillary definitive impressions were made by using zinc oxide- Eugenol. Posterior palatal seal area on the impressions was determined and transfer the marked zone. First definitive impression was dried to create the form for the pps using light-cured acrylic then to customize light-cured acrylic, the impression was placed into the mouth. Second definitive cast was carved according to marked zone where vary from zero at the anterior line to the depth of 1 to 1.5 mm along the posterior border .The posterior and total retention of the upper denture is Measured for each patient, by using spring. The data obtained was statistically analyzed using Student's independent T-test. The level of confidence was set at 95%.
Results: The result showed that there were statistically significant differences in the mean the posterior retention between the group in which Light-Cured Acrylic was used and the group of traditional Technique and in total retention (P=0.05).
Conclusions: The posterior palatal seal adaptation used by Light-Cured Acrylic is greater in retention than the scrap technique, without effect of gender on the total retention in the two techniques
References
2. Ansari, I. H. (1997). "Establishing the posterior palatal seal during the final impression stage." The Journal of prosthetic dentistry 78(3): 324-326.
3. Boucher, C. O. (1944). "Complete denture impressions based upon the anatomy of the mouth." The Journal of the American Dental Association 31(17): 1174-1181.
4. Colon, A., K. Kotwal and A. D. Mangelsdorff (1982). "Analysis of the posterior palatal seal and the palatal form as related to the retention of complete dentures." The Journal of prosthetic dentistry 47(1): 23-27.
5. Ettinger, R. L. and F. R. Scandrett (1980). "The posterior palatal seal. A review." Australian dental journal 25(4): 197-200
6. Ferro, K. J., S. M. Morgano, C. F. Driscoll, M. A. Freilich, A. D. Guckes, K. L. Knoernschild, T. J. McGarry and M. Twain (2017). "The glossary of prosthodontic terms."
7. Goyal, S., M. Goyal, D. Balkrishanan, V. Hegde and A. Narayana (2014). "The posterior palatal seal: Its rationale and importance: An overview." European Journal of Prosthodontics 2(2): 41-41
8. Hardy, I. R. and K. K. Kapur (1958). "Posterior border seal—its rationale and importance." The Journal of Prosthetic Dentistry 8(3): 386-397.
9. Krishna, R., R. B. Mandokar, S. Mishra, K. Jagadeesh, S. Janya and B. Alva (2020). "A Novel Functional Swallow Method to Establish the Posterior Palatal Seal during the Maxillary Edentulous Final Impression: A Case Report." J Contemp Dent Pract 21(12): 1404-1407.
10. Lee, J. H. (2021). "Digital Workflow for Establishing the Posterior Palatal Seal on a Digital Complete Denture." J Prosthodont.
11. Mariyam, A., A. Verma, S. Chaturvedi, N. Ahmad and A. Shukla (2014). "Posterior palatal seal (PPS): A brief review." Journal of Scientific and Innovative Research 3(6): 602-605.
12. Millsap, C. (1964). "POSTERIOR PALATAL SEAL AREA FOR COMPLETE DENTURES." DENTAL CLINICS OF NORTH AMERICA(NOV): 663-&.
13. Mishra, S., R. Krishna, R. B. Mandokar, S. Agarwal, A. Sharma and M. Shaw (2022). "A comparative clinical trial for evaluating the posterior palatal seal developed from the conventional method and a novel functional swallow method." The Journal of Indian Prosthodontic Society 22(1): 21.
14. Narvekar, R. M. and M. B. Appelbaum (1989). "An investigation of the anatomic position of the posterior palatal seal by ultrasound." The Journal of Prosthetic Dentistry 61(3): 331-336.
15. .Polyzois, G., P. Lagouvardos, C. Partalis, P. Zoidis and H. Polyzois (2015). "Short‐Term Assessment of the OHIP‐14 Scale on Denture Wearers Using Adhesives." Journal of Prosthodontics 24(5): 373-380.
16. Silverman, S. I. (1971). "Dimensions and displacement patterns of the posterior palatal seal." The Journal of prosthetic dentistry 25(5): 470-488.
17. Wicks, R., S. Ahuja and V. Jain (2014). "Defining the posterior palatal seal on a definitive impression for a maxillary complete denture by using a nonfluid wax addition technique." J Prosthet Dent 112(6): 1597-1600.