Vol(3) Issue (2)

                                                                                                            Cover pages to Table of Content  - Volume 3, Issue 2 2016 PDF

1- Assessment of denture hygiene habits among complete denture wearers attending Sulaimani Dental School
     Neda al-Kaisy, Tanya Hama Saddq, and Lazyan Latif Raouf


The purpose of the study was to record self-reported hygiene habits and examine the influence of denture hygiene level on the prevalence and intensity of denture stomatitis and traumatic ulcers in the edentulous maxilla of older patients wearing a complete maxillary denture. The study population comprised 38 maxillary complete denture (UCD) wearers (20 males and 18 females) aged 50–80 attending prosthodontics department of Sulaimani School of Dentistry. Denture hygiene habits were assessed and recorded. Biofilm on the internal surface of UCD was quantified using digital photos. Any relationships between denture hygiene habits, denture plaque and the condition of oral tissue were assessed.Of the participants, 94.7% cleaned their dentures with a toothbrush and 50% of them used toothpaste as cleaning method. The majority of them did not remove their dentures overnight and knew nothing about chemical denture cleansers for denture immersion. Only 26.3% of participants received instruction about denture and oral care from their dentists. Stomatitis was observed in 68.4% and traumatic ulcers in 18.4% of participants. A positive relation was observed between overnight removal of the denture and the presence of denture-related stomatitis. Data was analyzed using Chi-square test (P < 0.05).The degree of denture hygiene was significantly associated with sex, education, and overnight denture removal. No significant relation was found between denture plaque and denture stomatitis.Participants surveyed had limited awareness of denture hygiene care.

2. Perilesional sites of OSCC had altered P-cadherin expression

     Dena N. Mohammad 


Epithelial cells at surgical free margins are considered to be free of pathology at the morphological level. However, they might be associated with molecular changes when considering clonal expansion of pre-neoplastic cells in a particular tumor field; that subsequent genomic changes could drive them towards the malignant development.To evaluate the distribution and cellular localization of P-cad at the perilesional area of OSCC, in comparison with normal oral mucosa and correlate such expression to clinical parameters and histopathological grading of the primary lesion.Normal oral mucosa revealed membranous basal and parabasal expression. All the perilesional samples showed positive results with 55% overexpression. The cytoplasmic expression alone or mixed with membranous localization was the predominant expression (18 out of 20 cases). Sex, age, and clinical presentations did not show any significant relations in response to P-cad distribution or intracellular localization. While P-cad intracellular localization was significantly correlated with the histopathological grading (P=0.046) and epithelial cell layers distribution (P=0.026). P-cad overexpression was seen in 81.8% in WDSCC (9/11) perilesional sites.P-cadherin overexpression and shifting its intracellular localization from membranes to cytoplasmic and mixed at the perilesional site of oral cancer could be considered as a mark for revealing cancerization and lateral spreading. 

3. Effect of calcium carbonate nanoparticles on the bonding strength of maxillofacial silicone to acrylic substrate

      Fahd S. Ikram, Salem A.L.Salem Al-Samarraie, Jawad M. Mikaeel


The clinical life of a maxillofacial prosthesis averages about six months before it needs to be re-fabricated. Most of maxillofacial prosthesis attached to the acrylic resin via adhesive primers detached and have to be re-attached every few months. This in vitro study established to evaluate the effect of adding calcium carbonate nanoparticles at different concentrations on the bonding strength of maxillofacial silicone elastomer to the acrylic resin, before and after accelerated aging. Seventy samples were prepared, ten samples per each group. Each silicone sample sandwiched between two strips of acrylic resin via A-330-G adhesive primer. From each group five samples were undergoing accelerated aging. All samples were tested for shear bond strength by using Instron testing machine. Calcium carbonate nanoparticles have a significant effect on the shear bond strength of maxillofacial silicone to the acrylic resin and the groups that contain the lowest concentrations of calcium carbonate nanoparticles showed the most significant changes. It CaCO3 nanoparticles in trace amount can improve the shear bond strength of maxillofacial silicone elastomer to the acrylic resin after subjecting to accelerated aging.

4. Anthropometric Dimensions of Nasopalatine Canal measured by Cone Beam Computed Tomography among Kurdish population

      Dler Abdulrahman Mohammed


The purpose of this study was to find anatomical variation of nasopalatine foramen (NPF) and nasopalatine canal (NPC) in different age and gender groups among Kurdish people on cone-beam computed tomography (CBCT) images. This research included one hundred CBCT images obtained from patients visiting privet clinics with a specialty in dental and maxillofacial radiology in Sulaimani, Hawler, and Dhok governorates within a period between 2014 to 2016. Subjects were divided into three age groups (18-34, 35-49, 50-75) years old. The first group were included 15 males and 15 females, the second group 20 males and 20 females, and the third group included 15 males with 15 females. PaX i vatech digital CBCT machine was used to obtain the images by radiographers. The following measurements were estimated; number of openings of NPC at nasal fossa, mesio-lateral diameter of NPF at nasal fossa (axial section), mesio-lateral diameter of NPF at palatine fossa, anteroposterior dimension of NPC at: its upper border; middle level, and lower border, and lastly the height of NPC in sagittal section. 100 subjects (50 males and 50 females) with age range 31 years were included in this study. 69% had single NPF at the nasal fossa. 23% had two openings, and 8% had three openings. Mean and standard deviation (SD) of the mesio-lateral diameter of NPF at nasal fossa, and palatine fossa were 2.60±0.69mm, and 4.11±2.09mm respectively. NPF diameter at the palatine fossa showed significant differences between genders (P < 0.05). But age group differences did not reach the significant level (P > 0.05). The means and SD of the anteroposterior dimension of NPC were 3.46±1.53mm. There were no significant differences between genders and among age groups concerning this dimension (P > 0.05). Mean and SD of the height of NPC was 13.14±3.11mm. Males demonstrated the significantly greater length of NPC than females (P < 0.05). It is concluded that there is variation in the anatomy and morphology regarding various parameters of NPC among Kurdish population. This should be considered in mind in preoperative planning to reduce the number of complications in implant and other maxillofacial surgeries in the anterior palatine area. Also, it’s obvious that CBCT has an important role in obtaining accurate measurements of NPC different dimensions which have importance to differentiate between normal and abnormal NPC and NPF.

5. Clinical Evaluation of Post Insertion Problems among Newly Wearers of Complete Denture Patients in Sulaimani City

    Jwan R. abdulazeez, Hewa A. Salih, Cheman Aljamoor


Growth of the aging population will presumably increase the edentulous population in need of care with complete denture prostheses. The objective was to examine complete dentures in patients experiencing difficulties with their new prostheses, determine the most frequent complaints and their possible relation to age and gender. A total number of 200 complete denture wearer patients 126 females and 74 males participated in this study. A questionnaire was used to record the information which was taken directly from the patient when they attend the dental hospital. The information includes; age, gender, and types of the complaint. The study result revealed that; female number 126 ( 63%) was more than male 74 (37%), the number of the patients within the age group of above 60 years was 158( 79%), more than patients within the age group of 60 years,  42  (21%). The significant difference was found between gender and age groups (P < 0.05).   Pain 54 (27%) was the most common complaint of most of the patients in both genders, 23 (6.5%) for male and 31 (15.5%) for females. Loose Denture complaint had the lowest number among male 10 (5%), while complaint relating to mastication and eating had the lowest number of Females 18 (9%). No significant difference was found between gender and type of complaints (P> 0. 05). Speech problem had the highest incidence among patients within the age group of up to 60 years 11 (5.5%), while the highest incidence among patients within the age group of above 60 years, were pain complaint 45 (22.5%).  Complaint relating to eating and mastication had the lowest incidence among both age groups in total 34 (17%). No significant difference was found between age group and type of complain. Pain during insertion, removing, and wearing a complete denture had the highest prevalence, alongside speech problem in one age group only.  A significant difference was found between gender and age group. No statistically significant difference was found between gender and type of complaints.

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