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Article
Evaluation of faults encountered in recording final impression

Authors: Ammar Kh Al–Nori --- Munther N Kazanji
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2010 Volume: 10 Issue: 15 Pages: 49-54
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: To evaluate the quality of the impressions recorded for fixed and removable partial dentures and for completely edentulous patients by describing the frequency of clinically detectable errors. Mate-rials and Methods: A total of 250 impressions were evaluated immediately after they were recorded by two examiners. Three different impression materials were employed. Data relating to errors and faults including those related to tray construction, or related to impression materials used and those related to the operator were evaluated and analyzed. Results: Of 100 irreversible hydrocolloid impres-sions for partially edentulous arches, 90% had one or more detectable errors; while for condensation type of silicon 50% had one or more detectable errors. For complete denture impressions, silicon rub-ber base showed the least errors than zinc oxide eugenol paste impression and irreversible hydrocolloid that showed the highest errors. For fixed partial denture, impressions were recorded by silicon rubber base; the occurrence of faults were as follow: Voids in finish line 20%, detachment 6.6%, tearing 6.6%, premature removal 10% and pressure area 3.3%. Conclusion: Irreversible hydrocolloid impression material showed the higher detectable errors. Key Words: Impression materials, faults of impressions, irreversible hydrocolloid, silicon impression.

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Article
The Effect of Denture Base Surface Treatments on Microlekage of Soft Lining Materials

Authors: Nadia T. Jaffer --- Munther N. Kazanji
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2009 Volume: 9 Issue: 14 Pages: 168-174
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate the effect of two acrylic resin denture base surface trearments on microleakage
of 4 soft denture lining materials (Tru–soft, Bony plus, UfiGel–P and Molloplast–B after 2 periods of
storage and thermalcycling. Materials and methods: One hundred eighty specimens for microleakage
were prepared in a disc shape 30 mm diameter and 4 mm thickness (2 mm for acrylic resin part and 2
mm for soft lining material part). Soft lining materials were bonded to three different groups of
acrylic resin surface pretreatments (untreated, sandblasted and monomer treated denture base). These
specimens underwent two aging procedures: Storage with two periods (one week and one month), and
500 cycles of thermalcycling inside 2% methylene blue dye. Results: Statistical analysis showed that
treating the acrylic resin denture base by sandblasting increased microleakage of silicone–based linings
(UfiGel–P and Molloplast–B)and decreased microleakage of acrylic–based linings (Tru–soft and Bony
plus) in comparison to untreated denture base, while treating the denture base with MMA monomer
positively decreased microleakage for all tested soft lining materials in relation to untreated and
sandblasted denture base at one week storage, one month storage and at thermalcycling. Conclusions:
For all types of denture base surface treatments, microleakage was inevitable, however, wetting the
acrylic resin denture base with MMA monomer was more effective in reducing microkeakage than
sandblasted and untreated denture bases.

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Article
The Effect of Two Denture Adhesives on Maxillary Complete Denture Dislodgement. A Pilot Study

Authors: Mujahed T. Qasim --- Munther N. Kazanji
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2015 Volume: 15 Issue: 26 Pages: 381-386
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: The purpose of this study was to evaluate the effect of two denture adhesives on incisal bite force until denture dislodgement without and with the adhesive. This in-practice study assessed also patients’ perception regarding the use of adhesive. Materials and Methods: A total of 6 patients )2 men, 4 women( who wore complete maxillary and mandibular dentures were tested for denture performance both without and with denture adhesive. A locally constructed digital biting force device was used to measure the incisal bite force. Two adhesives pastes )Kin oro and Bony plus( were used in the study. Patients were asked to bite on the digital biting force device and the readings of incisal bite force were recorded. Patient perceptions )instant perception and delayed perception( after 1 week of using the denture adhesive were also assessed by a questionnaire and analyzed for denture performance on chewing and mastication, retention and fitness, confidence, comfort, and speaking. Results: The result showed that denture adhesives improved the incisal bite force of complete denture wearers significantly. The incisal bite force )in kg( )mean : without adhesive 1.78, with Kin oro 3.04, and with Bony plus 3.21(. There was an improvement in chewing and mastication, retention and fitness, confidence, comfort, and speaking after using both types of denture adhesives. Conclusions: The use of denture adhesive was found to be significantly effective in improving the incisal bite force of complete dentures until the dislodgement of upper denture. Bony plus paste adhesive was found to be more effective than Kin oro paste. Subjectively, the patients reported an improved perception of denture performance and that the use of adhesive provided greater confidence when using the prosthesis


Article
Evaluation of the effect of some denture cleansers on the colour of acrylic resin denture base materials

Authors: Munther N Kazanji --- Zina M Ahmad
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2004 Volume: 4 Issue: 4 Pages: 79-86
Publisher: Mosul University جامعة الموصل

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Abstract

The aims of this study were to evaluate the effect of denture cleansers on the colour of acrylic resin denture base material, and to evaluate the effect of particle size and surface roughness of acrylic resin material on their colour change. Sixty four acrylic specimens were prepared from the three types of acrylic resin materials of 30×20×1.5 mm (length× width× thickness, respectively). After the conditioning in distilled water, they were immersed in eight types of denture cleansers for 7 days. The colour changes were assessed using a computerized ultraviolet–visible spectrophotometer with accuracy up to 0.001. Visual examination of colour change was done by three independent examiners. The analysis of particle size was performed with a sieving machine. The surface roughness of acrylic specimens was measured using a computerized surface texture measuring and recording machine (Perthometer). A statistical analysis was performed using analysis of variance and Duncan's Multiple Range Test. The results revealed that there was a significant difference at p  0.01 between the tested solutions and also between the three types of acrylic resin materials. It was concluded that denture cleansers induced colour change of acrylic resin denture base materials. The self–curing acrylic exhibited the highest colour change. The smaller particle size and the smoothest surface of resin materials decreased the amount of colour change.


Article
Evaluation of Retentive Ability and Some Properties of Modified Denture Adhesive Materials

Authors: Amer A. Taqa --- Munther N. Kazanji --- Hala Khuder Ali
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 18 Pages: 303-309
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate pH, viscosity and retentive ability of modified adhesive materials and compared it with commercially available adhesive materials. Materials and Methods: The pH–value of 0.25% denture adhesive materials were determined using pH meter. The viscosity was determined by Ostwald viscometer (Aldrich Company). The retentive ability was measured by specially manufactured reten-tion testing machine using an acrylic resin disc samples which have 6cm diameter and 3mm thickness prepared from a special mold. Results: The findings of the present study showed that the "Bonyplus" gave the highest pH values of all materials tested. Also, showed that the "CMC” gave the highest vis-cosity values, while "Bonyplus" gave the lowest one. The "CMC" gave the highest retention while the "Distilled water" gave the lowest one. Conclusions: All denture adhesive materials tested have a pH equal to that of neutral. The viscosity test showed that the newly prepared materials have a higher vis-cosity than commercial denture adhesive materials. The retention test showed that the newly prepared materials have a higher efficiency than commercial denture adhesive materials.

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Article
Evaluation of the Bond Strength of Three Soft Lining Materials to Acrylic Resin Denture Base

Authors: Asmaa A Abid Al-Kadder --- Munther N. Kazanji
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2012 Volume: 12 Issue: 19 Pages: 57-65
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The aims of this study were to evaluate the effect of different surface treatments and different periods of water storage on tensile bond strength of three soft lining materials. Materials and me-thods: Two hundred sixty four (264) specimens have been prepared. Surface treatments used for bond-ing Molloplast – B liner included roughening acrylic surface with bur, and treatment with primo adhe-sive. For bonding Bony plus liner, roughening acrylic surface with bur, treatment with liner’s liquid and combination of both treatments have been evaluated. For GC Reline liner, roughening acrylic sur-face with bur has been evaluated.Befor tensile bond testing of molloplast-B liner’s specimens they were stored for(1 day or 1 month or 4 months), while Bony plus and GC Reline liners’specimenes were stored for(1 day or 1 week or 1 month) and then tested. Results: The results showed that roughening acrylic surface had an insignificant effect on (TBS) of GC Reline liner and Bony plus liner (although these materials showed cohesive failure). Bony plus liner’s liquid treatments had significant improve-ment in (TBS) of this liner. Different periods of water storage had insignificant effect on (TBS) of Mol-loplast-B liner and GC Reline liner, but (TBS) of Bony plus liner showed significant increasing after 1-month water storage. Conclusion: From the results of this study we can concluded that surface treat-ment to acrylic base improved tensile bond strength of soft lining material ,and the effect of water sto-rage on bond strength differed with different types of soft lining materials.


Article
Water absorption and solubility of coated and non–coated silicone–based permanent soft liner

Authors: Zeina M Ahmad --- Ahmed A Al–Ali --- Munther N Kazanji
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2010 Volume: 10 Issue: 15 Pages: 162-168
Publisher: Mosul University جامعة الموصل

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Abstract

AIMS: To determine the period of time that a new generation of silicone–based, chairside, permanent soft liner resist absorption and solubility and determine the effect of coating material. MAERIALS AND MEHODS: Specimens of (Mucopren soft) soft liner were prepared, stored in water, and tested after 1 , 2 , 3 , and 8 months. Half of the specimens were coated with coating material supplied by manufacturer and the other half remained uncoated. Silica gel was used for drying and sensitive elec-tronic balance was used for weighing specimens. Universal formulas were used for calculating water absorption and solubility. T–test and ANOVA followed by Duncan multiple range test were used to determine the significant difference at P<0.05 level. RESULS: There was no statistically significant difference between coated and non–coated soft liner in relation to water absorption and solubility. There was no statistically significant difference in water absorption and solubility when comparing it among the periods of testing from the first month to the eighth months. Coating the soft liner decrease the percentage absorption and solubility of the silicone soft liner but this effect is statistically not sig-nificant. CONCLUSIONS: Mucopren soft– lining material has proved excellent resistance to solubili-ty for a long period (8 months). Water absorption is limited and are clinically accepted. Coating (Mu-copren soft) soft liner with coating material slightly improve the resistance to water absorption and solubility.


Article
Effect of Incorporation of Calcium And Fluoride Salts on Transverse Strength of Acrylic Resin

Authors: Hind A. Al-abdali --- Munther N. Kazanji --- Gadah A. Taqa
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2015 Volume: 15 Issue: 26 Pages: 362-368
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The aims of this investigation were to determine the effect of incorporation of CaCO3 from egg shell and Fluoride salt NaF in different concentrations on transverse strength of RESPAL® NF(VEIN 24) heat cured acrylic resin denture base. Materials and Methods: 21 samples of heat cured acrylic resin were prepared, divided it’s into 7 groups; the 1st group Control HCAR , the 2nd group HCAR mixed with 2.5% CaCO3, the 3rd group HCAR mixed with 5% CaCO3, the 4th group HCAR mixed with 10% CaCO3 and the 5th group HCAR mixed with 2.5% NaF, the 6th group HCAR mixed with 5% NaF, the 7th group HCAR mixed with 10% NaF . The samples were tested after 48 hours from preparation for transverse strength test. Results: One way ANOVA and Duncan Multiple Analysis rang test were used and showed significant differences in the transverse strength between the two groups (CaCo3 and NaF), and significant differences between control and CaCo3 while no significance between control and NaF groups. Conclusions: It was concluded that adding NaF to HCAR led to an increase in strength of denture base and significant decrease in strength when adding CaCO3 to HCAR .This was within acceptable range of American Dental Association specification no.12 ,1975.


Article
Stability, Mobility and Pull out Forces of Immediate Loaded Endosteal Screw Type Dental Implants of 4 and 4.5mm in Diameter (Comparative Experimental Study)

Authors: Luay N Abood --- Munther N Kazanji --- Mumammed J. Essa
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2006 Volume: 6 Issue: SpIss Pages: S133-S141
Publisher: Mosul University جامعة الموصل

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Abstract

To compare the immediate loaded implants with the non–loaded type by pull–out force test measured with aids of semiautomatic strength tester machine and mobility test using orthodontic gauge and digital vernier. Materials and Methods: Twenty implants (Denti Dental implant system Ltd. Hungary) of screw type 10mm length with 4, and 4.5mm diameter were inserted in the mandible of 5 local breed dogs. Four implants for each animal, 2 of them were immediately loaded two days after surgery with Nickel Chrome crowns. Primary implant stability measured at the base line time, pull–out force test and mobility test done after three months of healing process. One–way analysis of variance with Duncan multiple range test were used for statistical analysis. Results: Revealed that there was no significant difference between the immediate loading and control group for the 4.5mm implant diameter, with significant difference for the 4mm diameter implant. No effect of time on the mobility of implant between the initial stability and final mobility of implants. The success rate of immediate loaded implants was 75% when compared to 100% success rate of non–loaded type. Conclusion: the immediate loading of screw type single–tooth implant of 4.5 mm diameter, 10mm length do not jeopardize tissue integration and osseointegration occurred properly as it is in the non–loaded delayed loaded type implants


Article
Construction of Nasal Prosthesis for a Patient with Rhino Cerebral Mucormycosis (A clinical Report).

Authors: Mohammad A Mohi Al–Deen --- Munther N Kazanji --- Nadira A Hatim
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2008 Volume: 8 Issue: 11 Pages: 110-113
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: To construct a nasal prosthesis for a patient with Rhino cerebral mucormycosis disease and of
near total Rhinectomy. Materials and method: a permanent soft lining material was adapted over
frame work of nose made from visible light cure denture base material, then cured, finished and
polished. Results the finished nose was retained by engaging undercut and by the use of eye glass.
Conclusion: A custom sculpted prosthesis combined with soft lining material gives a natural texture of
the nose was accomplished within 24 hour.

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