S Salimzadeh, H Sheykhnezhad, Z Zohri, P Salimzadeh,
Volume 4, Issue 3 (9-2019)
Abstract
Background and Aim: Patients affected by thalassemia major show great skeletal changes in the head and neck area in addition to malocclusion. It seems that examination of malocclusion in these patients and evaluation of the frequency of temporomandibular disorders (TMD) can help identify people with a high risk of illness in the society. The current study aimed to compare the frequency of TMD between β-thalassemia major patients and high school and guidance school students.
Materials and Methods: In this descriptive-analytical study, 51 patients affected by thalassemia major (23 girls and 28 boys) and 78 normal (43 girls and 35 boys) guidance and high school students between 12 and 18 years old were evaluated. The presence of TMD and malocclusion and their relationship were determined. After examination and completion of the related questionnaire, data were analyzed by chi-square test and t-test using SPSS software.
Results: According to the data, there was no significant difference in spacing, occlusion, crowding, open bite, headache, bruxism, crepitation, clicking, TMD, subluxation, locking, cleaning, deviation, deep bite, and crossbite between the control and thalassemia students (P>0.05). However, significant differences were observed regarding overjet and pain (P<0.05).
Conclusion: These results suggest that TMD and occlusion type have no significant correlation with thalassemia.
S Salimzade, S Sadat Mansouri , A Etemadi,
Volume 7, Issue 4 (10-2022)
Abstract
Background and Aim: Considering the efficacy of platelet-rich fibrin (PRF) in enhancement of healing by releasing growth factors, this study aimed to assess the efficacy of PRF application as a protective barrier right beneath the sinus membrane on the Schneiderian membrane thickness following sinus floor augmentation.
Materials and Methods: This randomized controlled split-mouth clinical trial was conducted on 18 patients (36 sinuses) who required bilateral sinus floor augmentation. Two patients (n=4 sinuses) were excluded due to chronic sinusitis, and one patient due to perioperative sinus membrane perforation. Fifteen patients (n=30 sinuses) were finally assessed. In the test side, PRF membrane was placed beneath the Schneiderian membrane while augmentation was performed without a PRF membrane in the control side. Cone-beam computed tomography (CBCT) scans were taken preoperatively, and at 1 week and 2 months postoperatively, and the Schneiderian membrane thickness was compared at the two sides using ANOVA and a post-hoc test.
Results: The mean membrane thickness was 1.85±0.85 mm in the control and 2.17±0.87 mm in the test group before the intervention (P=0.6). At 1 week, the mean thickness was 2.45±1.22 in the control and 3.77±1.42 mm in the case group (P=0.2). At 2 months, the mean thickness was 2.54±1.66 mm in the control and 1.71±1.31 mm in the test group (P=0.2). ANOVA showed no significant difference between the two groups at any time point (P>0.05).
Conclusion: Application of PRF under the Schneiderian membrane in sinus floor augmentation had no significant effect on the Schneiderian membrane thickness. |
