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Article
An Evaluation Of The Treatment Methods Of Denture Granuloma: A 5&#8722;Year Longitudinal Study.

Author: Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2008 Volume: 8 Issue: 2 Pages: 246-254
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate the prevalence of the position of denture granuloma in the oral cavity, to evaluatethe treatment methods of denture granuloma by different conservative prosthetic treatment or by surgicaltreatment, and to find if there is any relation between the length of the lesion and treatment methods.Materials and methods: Seven hundred and six (706) complete denture patients, age range between(40−70) year were treated by construction of complete maxillary and mandibular dentures, 550of them attended for adjustment after placement of the prosthesis. Patients are recalled for post insertioncare for 5 years. One hundred and seventy two (175) of the (550) patients were presented withdenture granuloma. In this study four treatment methods were applied according to the mean length ofthe lesion by using soft−liner and tissue conditioning materials. Results: Showed that 47.73% of denturegranuloma was located at the vestibule in the canine and premolar mandibular region. There was arelation with sequence of treatment with high significance of X 2 analysis. Conclusions: Tissue recoveryplays role in treatment of different an important length of denture granuloma


Article
Modification of gypsum products (Part I): physical and mechanical properties of adding some additives on different types of gypsum products

Author: Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2007 Volume: 7 Issue: 2 Pages: 206-212
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: A pilot study was done to evaluate the physical and mechanical properties of the Iraqi plaster (Al- Ahliya gypsum) and Plaster of Paris (British Gypsum), and to improve the quality by the incorporation of some additives. Materials and Methods: Two types of gypsum products were used in this study (Iraqi plaster, Plaster of Paris). Three types of additives {gum arabic at a concentration of (0.1%, 0.25%,0.35%, 0.50%), calcium oxide at a concentration of (0.1%, 0.25%, 0.35%, 0.50%, 0.75%), and ferric oxide acts as a pigment (blue or red) at a concentration of (0.1%, 0.2%)} were incorporated afterpreparation into the weighted dried gypsum powder. The effects of these additives on the physical andmechanical properties of the experimental gypsum products (Iraqi plaster and Plaster of Paris) have beenevaluated by measuring the water/powder ratio, setting time, linear setting expansion, and compressive strength. Four hundred sixty gypsum samples were prepared for this study. Mean, standard deviation, variance (ANOVA), and Duncan's multiple range tests were used to analyze the measurements. Results: ANOVA showed that there was a significant difference in the water/ powder ratio, setting time, linear setting expansion, and compressive strength between Iraqi plaster and Plaster of Paris depending upon the type and the concentration of each additive used. Conclusions: The last concentration of each additive (gum arabic 0.5%, calcium oxide 0.75%, or ferric oxide 0.2%) in all the experimental measurements that are incorporated within the two gypsum products showed


Article
The Effect of Surface Treatment on the Transverse and Tensile Bonding Strength of Relined Acrylic Resin Denture Base (Part I)

Author: Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 2 Pages: 202-210
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To investigate the effect of the thickness of relining material, curing method (water bath or mi-crowave), and the surface treatment by methyl methacrylate on transverse and tensile strength of re-lined acrylic resin denture base. Materials and methods: A pilot study was done by preparing 65 sam-ples to evaluate the effect of the thickness of relining material in relation to denture base on the trans-verse strength of acrylic resin denture base, and to study the effect of surface treatment by methyl methacrylate on the transverse strength of acrylic resin denture base. The main study was done by pre-paring 320 samples and divided into two parts to study the mechanical properties of samples represent-ing a denture base cured by water bath and other group cured by microwave curing technique, and then the effect of relining by the two curing methods and the effect of surface treatment were evaluated. Analysis of variance (ANOVA) and Duncan's multiple range tests were used for statistical analysis. Results: of this study showed that the different thickness of relining material in relation to denture base had no significant difference on the transverse strength of the relined denture base. The transverse strength and tensile bonding strength of the relined samples were significantly improved (P=0.05) by monomer surface treatment for 180 seconds. Conclusions: Transverse and tensile strength of the acryl-ic resin denture base were affected by relining. Microwave curing method gave better mechanical properties of the relined acrylic resin denture base.


Article
Effect of Relining Curing Methods on Some Properties of Acrylic Resin Denture Base (Part II)

Author: Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 2 Pages: 211-220
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To investigate the effect of relining by using two curing methods (water bath, or microwave) on some properties ( surface hardness, color property, residual monomer, and porosity) of relined acrylic resin denture base. Materials and methods: The study was done by preparing 320 samples, divided into two parts, the first part involved studying surface hardness, color property, residual monomer, and porosity of samples representing a denture base cured by water bath curing method, and the samples of second part cured by microwave curing method, then the effect of relining by the two curing methods (water bath, and microwave) were evaluated. Samples with dimensions of 30×15×3 ± 0.03mm for the indentation hardness test, 45×10×2.5mm for the color property test, 20×20×3mm for residual monomer test were prepared in this study. Analysis of variance (ANOVA) and Duncan's multiple range tests were used for statistical analysis. Results: surface hardness of denture base cured by microwave was significantly higher (at P=0.05) than denture base cured by water bath, all the relined samples has sig-nificant higher absorbance, and showed that the elusion of monomer was higher at the 1st day. Conclu-sions: Surface hardness, color property and residual monomer of the acrylic resin denture base were affected by relining. Microwave curing method gave better mechanical, and physical properties of the relined acrylic resin denture base, the amount of residual monomer was less in the microwave curing method. Both curing methods gave samples free from porosities.


Article
Effect of salvadora Persica Extracts on Titanium Alloy Surface Topography

Author: Nadira A. Hatim
Journal: Journal of Oral and Dental Research مجلة طب الفم والاسنان ISSN: 23106417 Year: 2013 Volume: 1 Issue: 1 Pages: 26-38
Publisher: Iraqi Association for Oral Research الجمعية العراقية لبحوث طب الفم

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Abstract

Introduction:Fluoride containing mouth rinses, and toothpastes have been reported to decreasethe corrosion resistance of titanium.Salvadora persica has been recently introduced in twoforms: tooth paste (Saudi Arabia) and mouth wash. The influence of these products on TitaniumAlloy Surface Topography has not been tested before. Aim of the study: To compare betweenthe effects of Salvadora persica(Siwak® toothpaste and its alcoholic extract), with fluoridecontaining tooth paste (kin® toothpaste) and kin® mouth wash on the corrosion of pure titaniumgrade 2 (cpTi). Materials and methods: Alcoholic extract of Salvadora persicawas prepared,and tested on sixty weighted samples of cpTi divided into 4 experimental groups. Samples in thecontrol group were immersed in distilled water. In the first experimental group, samples weretreated with Kin® tooth paste. For the 2nd experimental group, samples treated with Kin® mouthwash. Samples in the 3rd experimental group were treated with Siwak® toothpaste. The finalexperimental group was treated with extract of Salvadora persica. These samples were subjectedto surface topography (AFM) and transverse strength tests before, after three, and six months oftreatments. Results: Weighting test showed no significant difference (p≤0.05) between the meanvalues of four treated groups of cpTi samples before, and after 3 months. However, there was asignificant difference (p<0.05)between cpTi before and after 6 months treatment with Siwak®tooth paste. Surface topography showed a statistically significant difference between root meansquare roughnesses of cpTi samples after 3, and 6 months of treatment. Transverse strength alsoshowed a statistically significant difference between the mean value of cpTi between the treatedand control groups after three months and six months.Conclusions:Siwak® toothpaste seems to have more effect on both weight and roughness of cpTicompared to alcohol extract of Salvadora persicaand Kin® toothpaste.


Article
Estimation of the width of artificial anterior teeth in relation to the width of opposing natural teeth (A comparative study)

Author: Nadira A HATIM
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: 1 Pages: 27-31
Publisher: Mosul University جامعة الموصل

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Abstract

The purpose of this study is to determine the width of the missing central incisor of one arch when the central incisor of the other arch is available in personsliving in the north of Iraq, and to compare these measurements with persons living in the middle of Iraq.Four hundred Iraqi students from University of Mosul, North of Iraq were selected for this study, The measurements of maxillary and mandibular central incisors were done on (800) stone casts.A new method was concluded in this study to determine the width of a missing central incisor in relation to the opposing central incisor using the following equation: The width of maxillary central incisor = The Width of mandibular central incisor × 1.65.


Article
Dimensional accuracy of impression techniques for the endosteal implants (An in vivo study): Part II

Authors: Nadira A Hatim --- Basim M Al–Mashaiky
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2007 Volume: 7 Issue: 2 Pages: 131-137
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To determine the most accurate impression techniques and materials to transfer the exactposition of a single implant to stone die to construct the prosthesis for selected clinical cases. Materialsand methods: Five clinical cases were selected with special criteria to construct implant (Frialit–2)prosthesis on a stone die with high accuracy according to the results of study. Four impressiontechniques were used (direct and indirect, each with one and two steps) using condensation, addition(heavy, medium and light consistencies) silicone impression materials. Ten impressions were taken foreach patient to produce a total number of 50 stone casts. The direct and indirect measurements wereperformed by using digital vernier. Results: The significant differences between the impressiontechniques at the three axes of dimensions (p ≤0.05) were applied clinically to construct the fixedprosthesis for each patient. The results of this study showed that the high dimensional change oflaboratory cast was related to indirect one step impression technique to transform the implant positionfrom patient mouth to laboratory cast. Addition curing (medium consistency) silicone impressionmaterial produced the lowest accurate stone die. Conclusions: The results of this study showed that thedirect two steps impression technique was the accurate impression technique for transformation ofimplant position from patient mouth to laboratory cast. Additional curing (light and heavy consistency)silicone impression material produced the most accurate stone die and gave a successful treatment tothe patient.


Article
Bond Strength Of Different Artificial Tooth Manufacturing To Microwave Cured Acrylic Denture Base

Authors: Radhwan H Hasan --- Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2010 Volume: 10 Issue: 1 Pages: 8-16
Publisher: Mosul University جامعة الموصل

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Abstract

AIMS of this study are to investigate the bond strength and mode of failure of different tooth materials with and without surface treatment to acrylic resin denture base cured by microwave in relation to wa-ter bath techniques. MATERIALS AND METHODS: One hundred sixty samples of five different brands of acrylic teeth were divided into four groups (untreated and treated groups each of these were cured by water bath or microwave techniques). The bond strength between acrylic tooth and denture base resin was measured in shear mode by using unconfined compression machine. The shear bond strength (SBS) in MPa was calculated, debonded surfaces were examined using visual examination and reflecting light microscope . Analysis of variance (ANOVA) and Duncan’s multiple range tests were used for statistical analysis. RESULTS: there was a significant difference in bond strength of acrylic denture base to different tooth materials (P < 0.001). CONCLUSIONS: SBS of acrylic teeth treated by monomer surface treatment for 180 seconds to microwave cured resin was significantly higher than that of water – bath cured resin, and cross – linked acrylic teeth showed lowest SBS compared to other type of acrylic teeth.
Key words: Microwave, Bond strength, Cross – linked acrylic teeth.

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Article
Gag Reflex Reduction in A Patient with Maxillofacial Prosthesis. ( A Clinical Report )

Authors: Balsam K. Fathi --- Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2008 Volume: 8 Issue: 1 Pages: 114-119
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: the study was dedicated to demonstrate the importance of binding the old concepts of preventing
the gag reflex during the prosthodontic work together with the new advance in the concepts, techniques,
and materials in this scope. Materials and Methods: Silicone rubber base impression material (Oranwash
L, Zhermack, Italy) light, and heavy body was used in the study to take the impression by a new
technique (cheek bite technique) without the use of a tray, and on incremental basis, which showed
more comfort and better results. The prosthesis given to the patient took advantage of the neutral zone
principles, which whenever applied it gives better results, it was hollowed, in addition, the procedure
carried less stimulation to the gag reflex, and more assurance. Results: The obturator obtained by the
technique described was larger in size, lighter in weight, and more comfortable, and efficient in function
compared to the old one ,the entire procedure from the impression taking, to the delivery, and after, carried
less stimulation of the gag reflex, and gave better results. Conclusion: The advance in the prosthetic
materials, and techniques when combined with the available techniques, and information can give
better results.


Article
Mucosal Thickness Changes in Flexible and Conventional Cobalt Chrome Removable Partial Dentures Wearers

Authors: Mujahid T Qasim --- Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 2 Pages: 244-250
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: The purpose of this study was to determine the mucosal thickness changes in two types of remov-able partial denture base materials (Cobalt Chrome and Flexible) wearers over a two months period. Materials and Methods: Six patients (three men and three women) were included in this study, old ages group was over 50 years. The partially edentulous patients were randomly chosen from the De-partment of Prosthodontics, College of dentistry, University of Mosul. The effect of wearing flexible and conventional cobalt chrome (Co-Cr) RPDs on the underlying mucosa were studied, special record base of visible light cured made for each patients with three holes were used to record clinical meas-urements using digital caliber and followed up for two months after insertion of denture. Results: The result of this study indicated that there are significant mucosal thickness changes in the central and lin-gual (palatal) positions of the Co-Cr RPDs groups; with no significant mucosal thickness changes in three holes of the Flexible RPDs groups. Conclusion: This study concluded that the flexible denture is a good optional treatment in removable prosthodontics management. Patient satisfactions with flexible removable partial denture during function were concluded according to patients remarks in relation to cobalt chrome (Co-Cr) removable prosthodontics type.

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