Biomedical subjects

U Hasanreisoğlu

Publications and source records attributed to U Hasanreisoğlu.

15 recordsLinked to original sources

PubMed1991

Evaluation of the level of residual monomer in acrylic denture base materials having different polymerization properties.

The aim of this study was to evaluate the level of residual monomer in acrylic denture base materials having different polymerization properties. The investigation included a conventional-type acrylic cured under heat and pressure, as well as a pour-type resin polymerized by an injection-moulding technique at room temperature and under pressure. It was found that the residual monomer content ranged from 0.22-0.54% in pour-type resin, and from 0.23-0.52% in routinely used resins when the specimens were analysed by high performance liquid chromatography. These findings revealed that there were no significant differences between the two types of acrylic in terms of their residual monomer content.

Acrylic Resins↗

PubMed1990

[Clinical comparison of different types of obturators constructed after maxillary resections].

This investigation was carried on eight patients who had undergone partial maxillary resection for the eradication of tumors. Two types of obturators, one being hollow-bulb and the other buccal flange were constructed for each patient, using different impression techniques. When these were compared clinically, it was concluded that buccal flange obturators which were constructed without closed hollow sections were superior to the hollow-bulb obturators with closed nasal sections extending as far as possible into the anterior and lateral aspects of the defect, in comfort, function, speech and stabilization.

Humans↗

PubMed1990

[Overlay dentures].

Overlay dentures which are accepted as superposition appliances have been presented by three cases in this article. These kind of dentures are dedicated as prosthodontic restorations which are applied to extend maxillary arch horizontally in the cases of maxillary collapse. These restorations also increase the vertical dimension which has been lost and so help to improve the facial contour as well as esthetics of the individual-these dentures classified as removable partial or complete overlay dentures are generally applied in the cases of bilateral or unilateral maxillary collapse which have been caused by trauma or tumor resection.

Denture, Overlay↗

PubMed1990

[Evaluation of stresses in different cingulum rest seats].

Both lingual and incisal rest seats are used on anterior teeth. Lingual rest seats are preferred since they are more acceptable esthetically and located closer to the centre of rotation of the tooth. Lingual rest seats can be prepared directly on the abutment teeth as grooves, shoulders or may require restorations such as crowns, inlays and prefabricated rest seats to provide proper contour. In this study, the stress induced by two conventionally applied rest seats were compared with that of the U shaped rest seats which were recently induced. As a result it is found that more uniform stress distribution occurred in U and inverted "v" type rest seat designs.

Dental Abutments↗

PubMed1989

[Evaluation of the occlusal plane in dentulous and edentulous subjects].

The occlusal plane is an important factor in stability and esthetic of dentures. The location of the occlusal plane in complete dentures is a controversial subject. The occlusal plane in complete denture has often been oriented anteriorly to fulfill esthetic and posteriorly to Camper's line. However, recently the methods used for locating the occlusal plane appear to be less limiting. The purpose of this investigation was to compare the different concepts of occlusal plane. A roentgenographic cephalometric investigation was conducted to compare the position of the occlusal plane of the artifical teeth with that of the natural teeth which existed before the remaining teeth were extracted.

Cephalometry↗

PubMed1989

[Electromyographic evaluation of different types of obturators constructed after maxillary resections].

Our investigation included 6 patients who had undergone extensive surgery for eradication of neoplasms of the maxillae. Their surgical defects were similar and they had natural teeth on the unresected side. Two types of obturators were constructed for each patient, one being hollow-bulb and the other buccal flange. The hollow-bulb obturators had closed nasal sections extending as far superiorly as possible into the anterior and lateral aspects of the defect. Buccal flange obturators were constructed without closed hollow sections. Our study was designed to compare these obturators electromyographically. When the results were evaluated statistically, it was concluded that buccal flange obturators were superior to hollow-bulb obturators in stabilization and function.

Electromyography↗

PubMed1989

[Speech intelligibility in various types of obturators constructed after maxillary resections].

Six patients who had undergone partial maxillary resection for the removal of oral neoplasms were studied. For each patient two types of obturators were made one being buccal flange and the other hollow-bulb. Speech evaluations were made under three conditions: 1- with the hollow-bulb 2- with the buccal flange and 3- with no obturator. Speech evaluations were made both audiovisually and from tape recordings. In both audiovisual and tape recorded speech evaluations, the buccal flange obturator produced speech which was significantly superior to speech with hollow-bulb obturator.

Humans↗

PubMed1988