Yazd Journal of Dental Research

Introduction: The cranial base plays an important role in craniofacial growth. Since the maxilla is connected with the anterior part of the cranial base and the mandible rotation is influenced by the maxilla, a possible relationship may exist between the cranial base morphometric indices and sagittal jaw malposition. Therefore, the present study aimed to measure cranial base morphometric indices in the patients referred to Shahid Sadoughi faculty of dentistry.

Methods: In this descriptive cross-sectional study, 90 files of patients referring to orthodontic department of Shahid Sadoughi Dentistry School were selected which were divided into skeletal classІ (n=30), class П (n=30), class Ш (n=30). The anterior and posterior cranial base lengths (SN,SBa) and the cranial base angles (NSBa, NSAr) were measured. The SPSS software (ver, 16) was applied utilizing mann-whitney test in order to compare the indices between the three groups.

Reasults: The difference between the NSBa,NSAr mean was statistically significant in three groups, though the anterior and posterior cranial base lengths (SN,SBa) did not show any significant differences.

Conclusion: The study findings demonstrated that the saddle angle (NSAr) was highly related to sagittal malposition of the jaw.

Introduction: The incidence of hypodontia is frequently observed in the dental patients. Considering that a comparison of the prevalence of malocclusion in various racial and ethnic groups can lead us towards the etiology of malocclusion  and  guid us to appropriate prophylactic therapies, the current study aimed to investigate the relationship between hypodontia frequency and various malocclusions.

Methods: This retrospective study was conducted on 405 orthodontic patients with mean age of 15.8 and age range of 15-25 selected based on their diagnostic records who suffered from class I, II, and III skeletal malocclusions . Cephalometric Wits index and ANB angle criteria were used in order to divide the patients into class I (ANB>1-4 degrees), class II (ANB>4 degrees), and class III (ANB≤1 degree) malocclusion. To investigate the dental missing, panoramic radiographs and patients' records wereutilized. The gleaned data were submitted in to SPSS 17 and analyzed using T-test, ANOVA, and Chi-square tests.

Results: In the present study, out of 405 patients, 251 (62%) patients were females and 154 (38%) were males. The prevalence rate of hypodontia in orthodontic patients was 14.56% with inclusion of the third molar and 5.16% with exclusion of the third molar tooth. The frequency of various types of hypodontia in class I malocclusion was significantly greater than other types of malocclusion (P (P.V =0.02)<span style="font-family:;" dir="RTL" roman";"="" new="" "times="" roman";="" nazanin";="" b="" 11.0pt;="" 14pt;="" lang="AR-SA">.

Introduction: The academic status of the students is regarded as an important issue in the educational activities. Therefore, this study aimed to determine the effective factors on the academic achievement of dentistry students at Shahid Sadoughi University of Medical Sciences of Yazd.

Methods: This descriptive cross-Sectional study was carried out on 200 students from Shahid Sadoughi Dentistry School of Yazd in 2014 using the census method. All students with a GPA equal to or over 15 were considered as successful students and those with an average less than 14 were identified as unsuccessful students in regard with academic achievement. The study data were collected using a valid and reliable questionnaire, which were then analyzed using the SPSS software (ver 17) via Chi-Square test.

Results: The results showed, a significant difference was observed between the two groups of students in terms of individual characteristics (such as gender, student status, place of residence, employment, smoking, family income, mother’s education level) and academic characteristics (such as time gap between high school graduation and entering the college, high school GPA, student ranking in Concourse exam, number of educational units completed and the educational failures)(P<0.05), while no significant difference was detected between the two groups in age, marital status, education as well as parents’ occupation (P>0.05).

Conclusion: The findings of the present study revealed that   successful and unsuccessful students are significantly different  in regard with individual and academic features. Moreover, the role of such factors as psycho-social factors are recommended to be evaluated in the future studies.

Introduction: The loss of teeth and  denture use can thoroughly affect edentulous patients’ normal activities leading to a wide range of reactions in such individuals. Therefore, this study aimed to investigate the relationship between their treatment satisfaction and quality of complete denture prosthesis, oral circumstances, and patients’ psychological conditions. 

Methods: In this descriptive cross-sectional study, 50 edentulous patients were randomly selected referring to prosthesis department of Yazd Dentistry School within 2011-2014 in order to receive complete denture prosthesis. Quality of patients’ complete denture prosthesis and their oral (mouth) conditions were determined via an examination form. Moreover, patients’ psychological conditions were detected using QHQ28 questionnaire and their satisfaction score in regard with their complete denture prosthesis was measured via the VAS scale. The study data were analyzed by SPSS (ver 17) applying Mann-Whitney test and Spearman correlation coefficient.

Results: In the present study, 50 patients with a mean age of 61.04±8.88 were studied, among which 33 patients(66%) were males and 17(34%) were females. There was a significant negative correlation (P=0.047, r_s= -0.283) between patients’ mean satisfaction score of the denture and their psychological conditions. Furthermore, a significant positive correlation was observed between satisfaction score and quality of complete denture prosthesis (P=0.001, r_s=0.530), whereas a negative correlation (P=0.011,r_s= -0.358) was reported in regard with oral conditions.

Conclusion: The findings of the current study revealed that the higher the quality of denture was, the better patients’ psychological status was, and thus, the treatment satisfaction was higher. However, no statistically significant correlation was detected between patients’ treatment satisfaction and their oral conditions.