Abstract
Background: The posterior palatal seal (PPS) area plays a major role in retention of a maxillary denture. Many dentures have failed due to faulty recording of posterior palatal seal area. Hence, locating posterior palatal seal area is a critical step in complete denture fabrication. Various techniques have been described in the literature for locating the posterior border of maxillary complete denture. One of the most commonly used methods is the one that uses anatomical landmark like fovea palatine for locating the palatal seal area. However, many studies show a wide range of variation regarding position of fovea palatine with the vibrating line.
 Materials and Methods: A total of 200 subjects were selected for the study and clinical examination carried out to mark the vibrating line and fovea palatine. The location of vibrating line whether it is anterior to fovea palatine, on the fovea palatine or posterior to the fovea palatine in the different soft palate type(Class I, II or III) was recorded using the phonation method.
 Results: The vibrating line was located interiorly to the fovea palatine in 70%, 54% and 60% of the subjects with Class I, II and III soft palate. The vibrating line was located on the fovea palatine in22%, 40% and 36% of the subjects with Class I, II and III soft palate and posteriorly to the fovea palatine in 23%, 5% and 3% of the subjects with Class I, II and III soft palate respectively.
 Conclusion: The vibrating line was predominantly found to be anterior to the fovea palatine in all the soft palatal forms.
Highlights
Conventional complete dentures (CD) remain a major prosthodontic option for the treatment of completely edentulous patients and treating these patients has always been a demanding task [1]
The vibrating line was located on the fovea palatine in 22%, 40% and 36% of the subjects with Class I, II and III soft palate and posteriorly to the fovea palatine in 23%, 5% and 3% of the subjects with Class I, II and III soft palate respectively
The vibrating line was predominantly found to be anterior to the fovea palatine in all the soft palatal forms
Summary
Conventional complete dentures (CD) remain a major prosthodontic option for the treatment of completely edentulous patients and treating these patients has always been a demanding task [1]. Retention of a complete denture is primarily achieved by a valve like seal between the denture border and the underlying mucosa. Achieving this kind of seal in posterior border of maxillary denture is difficult [3]. Posterior palatal seal area plays a vital role in retention of maxillary denture. The posterior palatal seal (PPS) area plays a major role in retention of a maxillary denture. Various techniques have been described in the literature for locating the posterior border of maxillary complete denture. One of the most commonly used methods is the one that uses anatomical landmark like fovea palatine for locating the palatal seal area. Many studies show a wide range of variation regarding position of fovea palatine with the vibrating line
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