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Article
Radiographic and microscopic evaluation of the efficacy of two different techniques in obt-uration of internal resorption defects (An in vitro comparative study)

Author: Ragheed M Basheer
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2005 Volume: 5 Issue: 9 Pages: 83-87
Publisher: Mosul University جامعة الموصل

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Abstract

This study was designed to determine the effectivenessof lateral compaction and ultrasonic condensation obturationtechniques for internal resorption defects, for which 20 extractedhuman maxillary central incisors teeth were selected.They were instrumented up to size 55 file. Their roots weresectioned transversely 6 mm from the apex and hemicircularcavities were prepared in both sections using #6 round bur.The sections were glued back together using cyanoacrylatethus obtaining root canal with cavities simulating internal resorption.The teeth were randomly divided into 2 groups of 10teeth each. The following obturation techniques were evaluated:Lateral compaction (Group I), and ultrasonic condensation(Group II). Ultrasonic condensation gave good results.Obturated internal resoption defects were filled mainly withgutta percha. Statistical analysis showed that there was significantdifference between Groups I and II. Results with lateralcondensation were inferior compared to ultrasonic condensationtechnique for obturation of simulated internal resorptiondefects Therefore, the latter technique is recommended to beused to obturate the defects of internal resorption defects inclinical practice.


Article
The effect of metal alloys and surface treatment on the retention of cast post: An in vitro study

Authors: Jabbar H KAMEL --- Ragheed M BASHEER
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: 3 Pages: 128-139
Publisher: Mosul University جامعة الموصل

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Abstract

The main objectives of this study were to determine the effect of different metal alloy posts with different surface treatments cemented within their prepared post canal spaces with two luting agents on the tensile strength of cast posts. Ninety sound upper permanent canines were collected; the anatomical crown were removed about (1) mm above the Cemento-Enamel Junction, Preparation of post space Was made by using slow speed straight hand piece fixed onto swiveled arm of the Surveyor direct acrylic pattern is made and undergoes a casting procedure immediately. The samples were divided into (3) groups thirty in each; first group was casted with MAX-white A alloy, second group with CB Blando (72) alloy and the third group with Palliag M alloy. Three surface treatment procedures for each group were done. Ten samples in each, first group was sandblasted with (100)μm aluminum oxide andsecondone was sandblasted with (50) μmaluminum oxide and the third one receive no surfacetreatment and considered as a control group. Then each of these three groups were further subdivided randomly into two subgroups, (5) samples for each according to the type of luting agent used for cementation of the posts. First subgroup was cemented with zinc phosphate cement, the second subgroup was cemented by adhesive resin luting cement (Aureocem). A tensile strength tester was used to test the tensile strength.The results showed that there was no significant difference in the mean tensile strength among different alloys used and surface treatment with (100) μm aluminum oxide procedure, produced the highest tensile strength when it is used in combination with resin cement.Examination of the type of failure after tensile test showed that most of the samples cemented with resin cement failed adhesively at resin-dentin interface. While for samples that were cemented with zinc phosphate most of failure were cohesive within the cement followed by failure at the metal cement interface.

Keywords

Retention --- cast --- post --- resin


Article
Assessment of rabbit mandibular bone response to different amalgam implants radiographically

Authors: Nazar Gh Jameel --- Mohammad S Suleiman --- Ragheed M Basheer
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2004 Volume: 4 Issue: 7 Pages: 20-27
Publisher: Mosul University جامعة الموصل

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Abstract

The radiograghical interpretations can give an excellent indication about the biological response of hard tissue like bone to different foreign materials imp-lanted within it. This clinical study was carried out to evaluate radiographically the bone reaction of four different types of Iraqi manufactured amalgam alloys (in addition to Degussa alloys as a positive control) implanted within holes prepared in the mandibular bone of the rabbit, and additional negative control group in which the hole remained empty without any implanted materials was also included. The evaluation was done by careful verification of the presence or absence of the radiolucency at the periphery of the implanted amalgam at three different time intervals, the response varied from radio-lucency to radioopacity depending on the reaction of bone to different implanted amalgam alloys. Accordingly, the biocompatibility of the amalgam alloy was deter-mined depending on the radiographic pic-ture of bone response at the margin of the implanted alloys. The results showed no significant difference in bone response among the different types of alloy used.

Keywords

Amalgam --- bone --- implant --- biocompatibility


Article
Evaluation of endodontic work in Mosul city

Authors: Raid M Basheer --- Ragheed M Basheer --- Abdul–Adheem R Al–Mallah
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2007 Volume: 7 Issue: 13 Pages: 50-60
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate different steps of endodontic procedures done by the dentists in Mosul city. Materials and Methods: A dental questionnaire sheet that consisted of 21 questions regarding numerous steps of endodontics starting from pre–operative (diagnostic) phase to post–operative (final restoration) phase was distributed randomly to 150 dentists working in Mosul city. The dentists involved in the study were both specialists and non–specialists. Then, the sheets were collected and the data analyzed. Results: Revealed that there was a difference in performing specific steps of endodontics between the dentists. In some questions there was no great difference between specialists and non–specialists, but in other procedures, a great difference could be observed. This difference was not only between specialists and non–specialists groups, but also inside these groups as well. Conclusions: The dentists in Mosul city generally lack information about some important steps in endodontic work that may affect negatively the outcome of the procedure as a whole. This deficiency can be compensated for by holding continuous education programs in addition to the dentists’ responsibility in staying in contact with the most modern advancements in different fields of dentistry.

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