Journal of Marmara University Dental Faculty最新文献

The space between the resin and the cavity walls has always become interesting to search. The aim of this study was to evaluate any differences on leakage values of Class 5 type resin restorations prepared on surrounding surfaces of the tooth crown. Ninety human teeth were prepared as Class 5 cavities on buccal, lingual, mesial and distal surfaces and were randomly divided into groups for bevelling, groove preparation and as control. The subgroups were arranged as fluoride gel and/or sealant applications. Fluoride gel was applied following the cavity preparations. Sealant was applied over composite resin restorations. Treated teeth were thermocycled and immersed into dye solution for 96 hours. The restorations were evaluated in a stereo-microscope following the sectioning. Bevelling of the cavosurfaces and/or preparation of a groove addition to cavity procedures did not make any difference on the microleakage scores of the restorations done on either surfaces statistically.

The granular cell tumour (GCT) is a relatively uncommon neoplasm that shows a predilection for the oral cavity, especially the tongue. The tumour usually presents as a slow-growing, non-ulcerated nodular mass. It is most common in young and middle-aged adults and is twice as common in women as in men. Some studies have shown it to be relatively more common in coloured people. Multiple granular cell tumours occasionally may occur. Treatment consists of local surgical excision; recurrence is uncommon. This case report presents a case of GCT in a 32 years old woman's tongue and its treatment.

The purpose of the present study was to evaluate the colour stability of three laminate veneer materials against to tea, coffee and cigarette smoke. 72 discs prepared by using two different type composite materials and a dental porcelain were divided into groups and immersed into distilled water, tea, Turkish coffee solutions. The last group was exposed to cigarette smoke. Colour differences were measured by colorimeter at the beginning and then in the period of 1 day, 1 week and 1 month respectively. As a result, it was found that cigarette smoke was the most staining agent, porcelain material was the most colour stable material, and indirect composite material was more colour stable than the direct one.

500 children with ages ranging between 2 and 13 years and their families joined the study. A detailed questionnaire and a 3-day food intake diary were evaluated to find the relationship between dental caries and dietary habits. It is concluded that the prevalence of caries increases by frequent and high sugar consumption. With lower age and lower caries experience followed a more balanced diet. There was an inverse relationship between caries prevalence and the mothers' educational level. The percentage of children who never or irregularly brushed their teeth was highest in the caries active group.

The aim of this study was to investigate the caries status and susceptibility of children in preschool age. Sixty one children ages between 3 to 5 years (mean age 4.38 +/- 0.71) participated in this study. Caries status was assessed according to WHO criteria, and caries susceptibility by using the Cariostat test. The mean df-t was found to be 2.28 +/- 0.71 (df-s 6.26 +/- 11.92) and 31 children were caries-free. Cariostat scores were 1.75, 2.00, 2.16 in the 3, 4, and 5 year age groups respectively. There were no significant differences in caries status or Cariostat scores between boys and girls. The df-t for the 5 year age group was significantly higher than that for the 3 year age groups (p < 0.05). The test found 77% of the children to have a high caries risk (Cariostat score > 2.0).

The purpose of this research was to evaluate the effectiveness of combined root surface conditioning with tetracycline HCI, fibrin sealing system, guided tissue regeneration procedure and coronal sliding flap application in the treatment of localized gingival recessions. The present study was conducted on 10 patients with localized facial recessions of at least 3mm. A trapezium-shaped flap was elevated apically to the margin of the bone dehiscence and the root surface was thoroughly scaled by hand instruments and burs. Tetracycline HCI (pH 1.9) solution was then topically applied for 5 minutes and the root surface thoroughly rinsed with sterile saline. A collagen membrane was trimmed and shaped to cover the entire root surface and later removed and a fibrin sealing system injected onto the root surface. Immediately membrane was placed again on the root surface without applying any pressure. The flap was sutured in the coronal position to completely cover the root surface and membrane. Control group patients were treated with only coronal sliding flap operation. Sutures were removed 10 days after surgery. Patients were clinically reevaluated 6 months postoperatively. The mean amount of root surface coverage obtained was similar in the test and control groups (test = 71.7%; control = 68.55%) but the clinical attachment gain (test = 4.21mm; control = 2.86mm) and pocket depth variations (test = 1.14mm reduction; control = 0.07mm reduction) differed significantly (P < 0.001). This study found promising healing of localized gingival recessions to result from a combined use of tetracycline HCI root demineralization, fibrin sealing system application, guided tissue regeneration procedure and coronal sliding flap operation.

This study was undertaken to assess histologically the response to collagen based membrane materials that might be used for guided tissue regeneration (GTR) procedures, using a subcutaneous model on the dorsal surface of the rat. The commercially available materials included absorbable type I bovine collagen barrier, fascia lata, fascia temporalis and dura mater membranes. In the study 20 Wistar rats were used 80 implant materials were placed under general anaesthesia. Animals were sacrificed 7, 14, 28 and 42 days post-implantation. The specimens were assessed histologically for the composition of the tissue surrounding the membranes, the types of cells in infiltrate and the degree of resorption. It was concluded that these membrane materials were well tolerated and were gradually resorbed. Light microscopic examination showed that the type I bovine collagen and fascia lata were resorbed faster but fascia temporalis and dura mater were resorbed more slowly at 42 days. In addition the resorption process was continuing and these materials were evident histologically at 42 days.

The objective of this study is to evaluate and compare the analgesic efficacy of Piroxicam Fast Dissolving Dosage Formulation (FDDF) administered sublingually either preoperatively or postoperatively with that of aspirin and placebo. Hundred patients, undergoing surgical removal of mandibular third molars were given sublingually either piroxicam FDDF 40 mg or placebo or aspirin 500 mg according to a double blind experimental model. Pain scores and pain relief was recorded hourly for six hours following the operation. Rescue analgesics used during the trial and overall assessment of the drug were recorded at the end of six hours. Scores were evaluated statistically by student t test. Piroxicam FDDF was significantly (p < 0.05) more effective than aspirin and placebo for all variables, and less rescue analgesics were required in patients receiving piroxicam preoperatively. It was concluded that single doses of piroxicam FDDF administered sublingually either preoperatively or postoperatively appeared to be effective analgesic for the control of pain after third molar surgery with no side effects.

This study was performed to determine the fluoride concentration of the various cementum surfaces in different tooth groups to find out the most proper teeth and tooth surfaces for different cementum studies. For this purpose, direct measurements of phosphorus and fluoride were carried out in an acid etch biopsy solution. The findings indicate that incisors with exposed cementum are the most inappropriate teeth in comparison with the other groups. According to the results obtained it may be recommended that the studies related to fluoride uptake for cementum should be performed on teeth with no gingival recession or on the unerupted teeth.

Cortisol which is also called as stress hormone, is used as an indicator in the stress evaluation studies. 60 children who never visited a dentist before, participated in the present study. Saliva samples were collected from 30 children without any dental treatment (control group). Experimental group comprised 30 children with caries. Saliva samples were obtained at various stages during dental treatment. Totally 180 samples were collected and the cortisol levels were measured. Paired-t test has shown that the salivary cortisol levels at various stages of dental treatment in the experiment group were significantly higher in comparison with the control group. It is concluded that dental treatment may cause extreme stress in children who never had dental treatment experience before.