Ankara Universitesi Dis Hekimligi Fakultesi dergisi = The Journal of the Dental Faculty of Ankara University最新文献

In this study, the effects of various enzymes to remove C. Albicans, contamined on to the different kinds of specimens prepared from 5 different denture base materials were investigated. All kinds of enzymes investigated were found to be effective, but both protase and the pure lipase were observed to be more effective than the others by their zero colonies calculated. It was decided that pepsin, trypsin and pancreatic amylase have less effects on C. Albicans than the others.

Fifty-six single-rooted maxiller teeth obturated with amalgam, N2 and AH26 were tested in vitro to determine if dowel space preparation had an effect on apical seal. Dye penetration was evaluated using 210 UV Spectrophotometer and it was observed that the use of AH26 with or without gutta-percha to seal the root was the most suitable technique on apical seal and dowel space preparation did not influence the sealing ability of it.

Dental services given to 4-15 years old patients who referred to Dentistry Faculty of Gazi University, Department of Pedodontics between 1985-1988 academic years, were evaluated. Classifications were done according to age, gender and type of dental services provided and the importance of preventive dentistry was indicated as a result.

Regarding radiologic interpretation, parallax determines the different x-ray appearance of the same objects from various exposuring directions. In the present study the horizontal and vertical shift sketch method is used. This study is carried out on 31 patients admitted to Oral Diagnosis and Radiology Department. After recording the location of impacted teeth to the special forms, surgical intervention is performed. The susceptibility of this study is found 100 per. cent. Only in one mesio-dens case we had an conflict. This finding is also being discussed. The sophisticated details of the method is being described.

In this research, antibacterial effects of two cavity varnishes (Copalite and Espe), two bonding agents (Scotchbond and Adaptabond), and Delton fissure sealent, on the various microorganisms that are predominant in the oral bacterial flora, has been investigated invitro. The maximum antibacterial effect upon all the tested microorganisms has been found with Scotchbond. The other agents listed in decreasing order of effectiveness were, Copalite, Espe varnish and Adaptabond. Delton fissur sealent found to have the least measurable antimicrobial action.

Several obturation techniques and obturation materials are developed in order to fill the root canals completely. It was necessary to fill the root canals with solid and semisolid materials due to the unproduction of an ideal root canal sealer. The well known material that is being used, for this purpose today is gutta-percha. Single cone techniques, lateral condensation techniques and thermoplastic gutta-percha enjection techniques are used with sealers and without sealers in single rooted 30 teeth. And than, the amount of gutta-percha were evaluated by mean of herizontally taken section from 3 different levels of root canals. Finally the gutta-percha enjection techniques found to contein more gutta-percha amount in all three section levels than the single cone techniques and laterally condancation technique.

Given the potential for transfer of pathogenic microorganisms from dental impressions, a method for surface disinfection of impressions is needed to prevent spread of infection by way of impressions and casts made from them. The effects of disinfectant solutions on the impression materials linear and dimensional stability to prevent viral infections are investigated in this article. For this purpose, irreversible hydrokolloid and silicon rubber base impression materials and five disinfectant solutions were used. No apparent linear and dimensional change could be detected after 30 minute immersion in any of the disinfectants tested.

The aim of the present study was to evaluate the effect of citric and phosphoric acid conditioning the diseased root surface on periodontally extracted teeth. Citric acid pH1 and 50 per cent phosphoric acid were topically applied to thoroughly scaled and planed root surfaces for one to three minutes. The specimens were then processed for scanning electron microscopy (S.E.M.) Root surfaces that had received acid treatment after root planing exhibited no smear layer and the overall surface appeared to have an undulating morphology. Whereas, examination of nonacid-treated specimens showed the presence of a smear layer. Furthermore, phosphoric acid treated surfaces demonstrated more irregularity with increasing application time.

The dentist himself is responsible for the design of the removable partial denture, because he must know and apply the biomechanical principles also. Two mandibular removable partial dentures, one with a lingual bar and the other with a lingual plate as the major connector were constructed for 7 men and 9 women patients who had mandibular Kennedy class I edentulous area. Patients used each type of prothesis for one month. At the end of this period, speeching, chewing and comford of partial dentures were evaluated according to the patients subjective impression. In general, patients adapted best to major connectors that covered soft tissues least was better. As a result, generally patients preferred lingual bar type denture.

This study was performed on 50 female and 45 male subjects with orthodontic malocclusions. The aim of the study was to investigate the relationship between sagittal and vertical growth patterns of the cranio-facial complex. The sample was divided into six groups, (class I, II, III type and neutral, deep and open type) according to the ANB angle and Jarabak rate. As a result, the anterior and posterior facial heights were significantly smaller in the girls than in the boys. The relationship between the sagittal jaw interrelation and different vertical growth patterns of the face was not significant. It has also found that the discrepancy of the sagittal jaw relation was mainly caused by protrusive or retrusive position of the mandible relative to the cranial base.