Journal of Marmara University Dental Faculty最新文献

Normal human palatal epithelium is an orthokeratinizing tissue with a well-developed stratum corneum. Several cytological and histological studies showed that when the palate covered by a denture fully or partially, keratinization of the mucosa changes. The results of some studies suggested that keratinization changes from orthokeratosis to parakeratosis, and there is a reduction in the thickness of stratum corneum. Whereas the results of some other studies showed increased orthokeratinization. This study was planned to determine changes in keratinization of palatal mucosa in denture wearers compared with normal palatal mucosa. Keratinization of palatal mucosa was examined by mainly exfoliative cytology in three groups. Group-1 consisted of 51 patients wearing metal-based removable partial denture; group-2 consisted of 50 patients wearing acrylic-based complete denture and group-3 including 57 healthy volunteers who have not been wearing denture served as the controls. In each group, the results of exfoliative cytology were supported by histological examinations. Statistical results showed that either acrylic-based complete or cobalt-chromium-based removable partial dentures seem to reduce the quantity and/or quality of the keratin layer. The mean values of keratinization and the thickness of stratum corneum were significantly lower in the complete denture group than in the partial denture group. Furthermore the reliability of exfoliative cytology was confirmed by the guidance of histological examination.

The aim of the present study was to assess the efficiency of a 1% chlorhexidine-containing varnish (Cervitec, Vivadent, Liechtenstein) on the levels of Streptococcus mutans in saliva of patients with fixed orthodontic appliances using the Dentocult-SM (Vivadent, Liechtenstein) technique for the microbiological investigation. Eighty subjects participated in the study and, divided randomly into two equal groups in which one group was treated with the placebo varnish (Vivadent, Liechtenstein) for negative controls. Streptococcus mutans in saliva of the subject was sampled and enumerated by using the Dentocult-SM dip-slide technique for periods of one, two four and twelve weeks after a single varnish application. The results were evaluated statistically. After the chlorhexidine containing varnish treatment the levels of Streptococcus mutans in saliva were significantly reduced after one week (p < 0.01) and continued reduction for one month (p < 0.05). After twelve weeks Streptococcus mutans levels in saliva were given a relative increase. No significant suppression was found in the placebo group (p > 0.05). The results suggested that Cervitec varnish reduces salivary Streptococcus mutans levels and that the application should be repeated every 3 months to get antibacterial effect.

After orthodontic treatment prosthetic restorations are sometimes still necessary to improve the patient esthetics. After routine orthodontic procedures (alignment of teeth and achievement of functional occlusion) conventional crowns and bridges are used. In this case study, the follow-up results of four patients are presented. They had been treated by various disciplines; orthodontics, plastic surgery and prosthodontics. Satisfactory esthetics and function were achieved with all patients.

In treatment of bone defects, transplantation of autogenous iliac bone and marrow give satisfactory results. Titanium mesh implants have also been used reconstruction of maxillofacial defects for years. Specifically, this technique of provides stabilization in ununited fractures of edentulous and atrophic mandibles, and facilitate bone grafting. This paper report the use of titanium mesh and autogenous iliac bone grafting in an ununited mandibular fracture one year after injury.

The aim of this study was to evaluate the effect of a new varnish with fluoride, Fluoridin N-5, on the exposed dentine tissue in situ. Human incisors which were mounted into intra-oral devices were worn by six volunteers and the test materials were applied three times a day for fourteen days. Three different materials were used as three test groups: Novalite, Fluoridin gel N-5 and Amalgam liner. Although both the control and test groups showed some increases in hardness, the mean hardness increase of all of the test groups was significantly higher than that of the control group (p = 0.007). However, the comparison of mean increases in hardness values showed no significant difference among the test groups.

A double-blind, randomized, cross-over study to compare diflunisal and paracetamol for postoperative pain, swelling and trismus relief following impacted mandibular third molar surgery was designed. 25 patients received one of the drugs at one visit and the alternative at the other visit. First doses were given two hours preoperatively and continued twice daily for five days. The study was carried out to determine the effect of preoperatively used diflunisal on postoperative pain after surgical removal of the third molars as compared to paracetamol used in a similar manner. The degree of impaction, pain, swelling and mouth opening were assessed by standardized methods and possible adverse effects were also recorded separately. Statistical analysis was carried out by "Student's t test". (p < 0.01 statistically significant).

In this study three type of tissue conditioning materials (Visco-gel, Fixo-gel, Fitt) are used in vitro to investigate the presence and growth of Candida albicans. In vitro test results of different tissue conditioners showed no inhibiting effect on Candida albicans.

The purpose of this study was to determine the presence of certain inorganic elements in various cementum surfaces. The electron probe analysis appears to be the most suitable technique for examining elemental composition within localized small areas of mineralized tissue, it was used to determine the mineral contents of nondiseased, periodontally diseased and root planing applied diseased cementum surfaces were determined by electron probe. Calcium (Ca) and phosphorus (P) were the elements searched for. Surface morphological features of these cementum surfaces were also examined. Electron probe analysis indicated an elevated Ca and P content in diseased cementum surfaces. Root planing of these surfaces did not reduce the mineral contents of these root surfaces. Our findings indicate that on the cementum surfaces affected by periodontal disease inorganic contents were altered and the hypermineralized layer in diseased cementum may play a role in preventing total diseased cementum removal by root planing.

Recurrent oral ulcer (ROU) is a common disease whose the etiologic factors have not yet been identified. Although the autoimmune mechanism due to streptococcal antigens may be involved in this disease, serum immunoglobulins are reported to be higher than normal controls in various phases of ROU. Oral ulcers are one of the criteria in the diagnosis of some systemic diseases such as Wegener's granulomatosis, Behçet's syndrome, suppurative arthritis, Reiter's syndrome and neutropenias. Any patient with recurring oral ulcers should be evaluated medically for the possible presence or future development of serious systemic diseases. In this study of the 58% of the ROU patients who had positive ASO values, only one female patient had a moderate increase: ++ASO(= 400 IU), the rest had a slight increase: +ASO(= 200 IU). In the control group only 3 female subjects had +ASO (= 200 IU). The aim of this study was to determine whether there is any relationship between ROU and rheumatoid arthritis. Patients with ROU were examined for antistreptolysin O, rheumatoid factor and C-reactive protein and compared to healthy controls.

In this case report, we present an unusual complication of a previously inserted dental implant leading to maxillary sinusitis. The implant was removed and the patient postoperatively prescribed antibiotic medication. At the follow-up examination, healing was observed without any complications.