Vol 21 No. 1

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J Bagh College Dentistry Vol.21(1), 2009 Reliability of fovea … Reliability of fovea palatinea in determining the posterior palatal seal Yasmen T. AL – Alousi, B.D.S, M.Sc. (1) ABSTRACT Background: The present study was carried out to study the position of fovea platinae in relation to posterior palatal seal (post dam) in an Iraqi, population sample, whether in front, at or behind, and gender differentiations. Material and methods: A clinical examination was carried out on 200 patients with edentulous maxillary arch, attending prosthetic Department in the College of Dentistry, Baghdad University. Only 110 patients meet the study's criteria. Each patient was examined for the location of vibrating line whether in front, at or behind the fovea platinae. Results: The results showed that 50.9% of patients had their vibrating line at their fovea platinae, 44.5% had it in front and 6.4% behind. There were highly significant differences between; age groups of patients, gender distribution of patients, significant differences between; age group and gender of patients, and non significant differences between gender and position of posterior palatal seal in relation to fovea palatinae. Conclusion: The study concluded that fovea palatinae is: A reliable anatomical land mark that helps in determining the posterior palatal seal (post dam). The majority of patients had their vibrating line at their fovea palatinae Key words: Posterior palatal seal, post dam, fovea platinae, vibrating line. J Bagh Coll Dentistry 2009; 21(1): 41-45) INTRODUCTION Determining the location of the posterior border of the maxillary denture plays an important role in its retention and patient comfort. Since the twenties of last century many authors have evaluated techniques relating to the location of the posterior border of the maxillary denture. One of the easiest and most practical methods is using the anatomical land marks (fovea palatinae and hamuler notches). (1) All authors agreed about the relation between the vibrating line and the posterior border of the maxillary denture. (2-4) The vibrating line of the palate is the junction between the movable and immovable portion of the soft palate. (2,3) To determine the location of the vibrating line there are the fallowing techniques: 1. Phonation of the "ah" sound. (1,4) 2. The swallowing method. (5,6) 3. The nose blowing method. (4) Some anatomical structures are significant guides for locating the posterior border of the maxillary denture. These guides include the fovea palatinae which are close to the vibrating line and are always in soft tissue, making them useful guides for the location of the dentures posterior border (3,7) . The aim of this study is to investigate the reliability of fovea palatinae for determining the posterior border of the maxillary denture. (1) Assistant lecturer, Department of Prosthodontics, College of Dentistry, Baghdad University MATERIALS AND METHODS A clinical examination of the palate of 200 patients with edentulous maxillary arch, randomly selected from patients at- tendering prosthetic Department in the College of Dentistry Baghdad University. The palate of each patient was examined for evidence of pathological changes, for the visibility, number and location of the fovea palatinae, plus the visibility of the vibrating line. From 200 patients only 110 met the study criteria, 76 male and 34 female of age groups ranging from (40-85) years. These patients were asked to open wide and pronounce "ah" sound repetitively; both the fovea palatinae and the vibrating line were marked with an indelible pencil after drying the area with gauze. Each patient was examined by three seniors independently. If they agreed to the position of the vibrating line whether in front, at or behind the fovea palatinae. They will proceed to the next patient if not they will repeat the examination until their results coincide. Suitable statistical methods were used in order to analyze and assess the results using a computer through the SPSS program and Excel application, descriptive statistics and inferential statistics. RESULTS The following tables and figures involved the results of many parameters investigated to evaluate patients. These studied parameters involved in this study will be reviewed and discussed as follows: Distribution of age groups (Year) of patients: (Table and Figure 1) A total of 110 patients were included in the present study. Data from table and figure 1 indicated that the number and percentage of Restorative Dentistry 41
J Bagh College Dentistry Vol.21(1), 2009 Reliability of fovea … patients with age groups (51-60 and 61-70) years were higher [44 (40 %) and 31 (28.2 %), respectively], than other age group (40-50) years was [19 (17.3 %)], with highly significant difference (P0.05). Relationship between test results: (Table and Figure 7) Generally, the behind position of post dam was increased in negative result (103, 93.6%) while decrease positive (7, 6.4%), with highly significant difference (P0.05) for both test. On other hand, the comparison between in front & at position of post dam was non significant difference (P>0.05) but highly significant difference (P
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