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Article
The Microetching Effect on the Shear Bond Strength of Orthodontic Metal Brackets

Author: Hakam H Sabah
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: 21 Pages: 37-44
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: To evaluate and to compare the shear bond strength of new brackets, new microetched brackets and debond microetcher clean brackets when bond to virgin and previously bond teeth. Materials and methods: Thirty human premolars were randomly assigned into three groups, 10 teeth for each. Group V1 (virgin teeth bonded by new brackets), group V2 (virgin teeth bonded by new microeched brack-ets), and group V3 (virgin teeth bonded by debonded micretched cleaned brackets). All groups tested for shear bond strength. After that all teeth cleaned from composite and randomly assigned again into three groups, 10 teeth for each group. Group P1 (previously bonded teeth rebonded by new brackets), group P2 (previously bonded teeth rebonded by new microetched brackets), and group P3 (previously bonded teeth rebonded by debonded microetched clean brackets) and again all groups tested for shear bond strength. Results: There are no significant differences between virgin teeth groups and previously bonded teeth when clean previously bonded teeth from old adhesive as descried in this study however the previously bonded teeth groups showed the lower mean value than virgin teeth. New microetched and debonded micretched brackets groups showed significantly higher value in comparing with new bracket groups while there were no significant differences between new micretched and debonded mi-croetched groups with greater mean value for new micretched groups. Conclusion: Bracket recycled by microetching using 50–μm aluminum oxide particle was appears to be very effective method for bracket accidental debonded and Previously bonded teeth had shear bond strengths comparable to vir-gin teeth(new bonded) when adhesive remnant removed by

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Article
Effect of Enamel Resin-Removal Methods on Tensile Bond Strength of Rebonded New Brackets

Author: Hakam H Sabah
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2013 Volume: 13 Issue: 25 Pages: 176-183
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The objective of this study is to determine (1) the effect of different resin-removal methods on tensile bond strength (TBS) of rebonded new brackets (2) compare various methods of enamel resin-removal to define the best method that produces adequate bond strength (3) to compare the bond strength of newly bonded enamel (virgin enamel) with previously bonded enamel after resin removal from the enamel surface with different methods. Materials and Methods: Seventy human premolars were bonded with stainless steel new brackets, then the teeth were randomly assigned in to 7 groups, each group of 10 teeth. Group1 (control group) where TBS at the first debonding was evaluated (initial bond). Group2 brackets were debonded by bracket removal plier and the remnant adhesive removed by high-speed tungsten carbide bur (TCB) and rebonded with brackets as in initial bond, then the TBS were tested. Group3 as with group2 except that the remaining resin were removed by low-speed TCB . Group 4 as with group2 except that the remaining resin were removed by Diamond carbide Disk . Group 5 as with group2 except that the remaining resin were removed by a microetcher, Group 6 as with group 2 except that the remaining resin were removed manually by composite removing pliers, Group 7 as with group6 except that rebonding bracket without cleaning enamel with rubber cup and pumice. Results: All rotary instrument groups (G2, G3 and G4) showed significant increase in the TBS in comparing with the other groups (G1, G5, G6 and G7) also there were significant decrease in the TBS of the manually removal of adhesive remnant groups in comparing with control group, while there were no significant differences between microetcher group and control group with greater mean value for control group. Conclusions: The outcomes of this study showed that the use of the rotary instrument in the removal of adhesive remnant gives the highest tensile bond strength in compared with the other methods used in this study .


Article
Orthodontic Treatment of Unilateral Impacted Complete Transposed Maxillary Canine and Impacted Dilacerated Maxillary central incisor

Authors: Hakam H Sabah --- Saba H. Al–Zubaidi --- Omar H. Alluazy
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2017 Volume: 17 Issue: 33 Pages: 58-67
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The purpose of this article was to present a case of surgical exposure and orthodontic reposition of impacted dilacerated maxillary left central incisor. Also surgical exposure of impacted maxillary left canine followed by orthodontic treatment of canine-lateral incisor complete transposition. result : this article describe the treatment of a teenager girl who had impactions of the maxillary left central incisor and canine as well as canine-lateral incisor transposition. The dilacerated impacted central incisor was uncovered and orthodonticaly extruded into the dental arch. Then the impacted canine was surgically exposed and orthodonticaly moving the tooth palately then distally to brought it into its normal position. Conclusion : concurrent impaction and transposition of maxillary anterior teeth is uncommon and poses a challenge for the dentist. Early diagnosis and management of eruption disturbances give us both esthetic and functional outcome benefits


Article
Effect of chlorhexidine mouth wash and flouridated mouth wash on mechanical properties of orthodontic arch wires (An in vitro study)

Authors: Khawla M Awni --- Hind T Jarjees --- Hakam H Sabah
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2011 Volume: 11 Issue: SpIss Pages: S150-S159
Publisher: Mosul University جامعة الموصل

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Abstract

Aims: The aims of the this study were to measure the effect of chlorhexidine and fluoridated mouth wash on mechanical properties of stainless steel and nickel titanium wires and to study the effect of three time intervals (3, 7, and 10 days) immersion on these mechanical properties. Materials and Methods: Two types of orthodontic wires were taken which included stainless steel and superelastic nickel titanium wires (Dentaurum, Germany). The 0.016×0.016 inch wires were selected. Each type of wires divided into seven groups; control group and six experimental groups in which the wires immersed in the chlorhexidine and fluoridated mouth wash for 3, 7, and 10 days and then the mechanical properties of wires (yield stress, ultimate tensile stress, modulus of elasticity) measured by using the universal tensile testing machine. Results: The results of the present study showed that a significant difference in the mechanical properties of both stainless steel and nickel titanium wires between the control group and experimental groups immersed in the fluoridated mouth wash and this decreased in the mechanical properties as immersion time increased. Also the results of the present study showed that a non significant difference in the mechanical properties of both stainless steel and nickel titanium wires between the control group and experimental groups immersed in the chlorhexidine mouth wash. Conclusions: The results of the present study indicated that the fluoridated mouth wash decreased the mechanical properties of stainless steel and nickel titanium wires and this degradation in mechanical properties could contributed to prolong orthodontic treatment. While the chlorhexidine has no effect on mechanical properties of stainless steel and nickel titanium wires


Article
Morphological relationship of face form in lateral and frontal planes of young Iraqi adults (18-25) years in mosul city

Authors: Dr. hakam H. Sabah. ** د.حكم صباح --- Dr. Enas T. M. Al-Jwarry. * د.ايناس
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2009 Volume: 6 Issue: 4 Pages: 325-333
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

To determine the face type of young Iraqi adults in Mosul city and to find out the possible relationship of the face form in frontal and lateral planes.The sample subjects were normal class I molar and canine relationship, all subjects were following special criteria. The sample included: 60 Iraqi young adults (30 males and 30 females), aged (18-25) years. All subjects were radiographic with lateral and frontal cephalometric and the films were traced. The tracing is done including the external and internal contour of cranium, pituitary fossa, nasomaxillary complex and the mandible and it's out lie. The result was subjected to the descriptive statistics, to T-student test and to chi-square test to investigate the sex difference of facial type and means between the two sexes.All the linear measurements are significantly differ with the males having the large value. From the lateral view, the majority of the sample (60,9%) having mesofacial type with no significant difference between the two sexes, followed by dolichofacial type (34,4%) with the females having significantly large value than males, and the least brachyfacial type (4,7%) with the females having significantly large value.From the frontal view, the majority of the sample (84, 4%) having leptoprosopic type with no significant difference, followed by mesoprosopic type (15, 6%) with the females having significantly large value than males.The most frequent facial pattern, of this present sample in lateral view is mesofacial followed by dolichofacial and the least is brachyfacial, while in frontal view is leptoprosopic followed by mesoprosopic type. There is good correlation between facial type in frontal and lateral planes.


Article
A Comparative Assessment of Space Closure Utilizing by Lingual and Conventional Brackets

Authors: Omar H. Alluazy --- Hakam H. Sabah --- Saba H. Al–Zubaidi --- Mustafa M. Al-Sultan
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2014 Volume: 14 Issue: 29 Pages: 220-227
Publisher: Mosul University جامعة الموصل

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Abstract

AIMS:To assess the effect of system type on the amount of space closure when equal force use on each system and to compare the amount of rotation and tipping generated by lingual and conventional brackets. Materials and Methods: A mandibular typodont system with Class I wax form and set of metal teeth were used in this study. After removing the second premolar bilaterally, each tooth of the anterior teeth and canines were bonded with two bracket systems , preadjusted Roth stainless steel 0.022x0.030 inch conventional (labial) brackets (CoBS group) and lingual brackets (LiBS group) except right first premolar were bonded with lingual bracket (LIBS group) and left first premolar were bonded with labial bracket (CoBS group). Bite plane extension bar (BPB) and canine extension bar (CB) were constructed bilaterally for the measurement of first premolars tipping and rotation. A 200gm. of force applied by close coil spring to retract the first premolars bilaterally . After immersion of the typodont in water bath with 50-550 C for 5 minutes, the rate of space closure , tipping and rotation of first premolars were measured. Results: A statistical analysis (independent-samples t-test) used in this study, there was a significant difference between the two system groups (CoBS group and LiBS group). The LiBS group had a significant higher amount of tooth movement, and higher degree of rotation. For the tipping, the CoBS group had the higher level of tipping with a non-significant difference with LiBS group. Conclusions: The outcomes of this study showed that the higher rate of space closure and rotation were associated with LiBS group, while there is a nonsignificant difference in the amount of tipping between the two groups. So, Lingual appliance was appeared to be very effective method for tooth sliding during fixed orthodontic treatment.

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