Open Access. Powered by Scholars. Published by Universities.®

Medicine and Health Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

Dental Public Health and Education

PDF

SelectedWorks

Keyword
Publication Year
Publication

Articles 31 - 41 of 41

Full-Text Articles in Medicine and Health Sciences

The Effects Of Oxygen-Based Disinfectant On Dimensional Accuracy Of Alginates, Noor Hayaty Abu Kasim Abu Kasim N.H. Jan 2005

The Effects Of Oxygen-Based Disinfectant On Dimensional Accuracy Of Alginates, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

Objective: This study evaluated the effect of an active oxygen based disinfectant, 2% Perform® (Schulke & Mayr, Germany) on the dimensional accuracy of four alginates, Alginoplast (Heraeus Kulzer, Holland), Kromopan (LASCOD, Italy), Alginmax (MAJOR, Italy) and Duplast (Dentsply, China). Method: A cobalt chromium master model with four cylindrical studs representing 2 canines and 2 molars was constructed. A total of 40 impressions for each alginates were taken and treated in 4 different conditions, Immediate pour (control); 10 minutes immersion in distilled water; 10 minutes immersion in 2% Perform® and 30 minutes in 2% Perform®. The impressions were then poured in …

Go to article

Cleaning Ability Of Disinfectants For Dental Steel Burs, Noor Hayaty Abu Kasim Abu Kasim N.H. Sep 2004

Cleaning Ability Of Disinfectants For Dental Steel Burs, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

Dental burs are a source of bacterial contamination due to its direct contact with carious teeth, saliva and blood. Objective: The aim of this study was to evaluate the disinfecting and cleaning ability of selected commercially available disinfectants on dental burs. Method: Size 5 round stainless steel burs were used to excavate caries from freshly extracted human molars. The burs were then immediately immersed in Grotanat Drill Bath (Shülke & Mayr, Germany), Micro 10 (Unident, Swizerland), Gigasept FF (Shülke & Mayr, Germany), Lysetol AF (Shülke & Mayr, Germany) and 70% Isopropyl alcohol (J.Y. Baker, USA) according to the manufacturer's instructions. …

Go to article

Dental Students' Perception Towards Effective Clinical Feedback And Assessment, Noor Hayaty Abu Kasim Abu Kasim N.H. Jan 2004

Dental Students' Perception Towards Effective Clinical Feedback And Assessment, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

Supervised practice in the dental clinic is one of the teaching tools in preparing a good dental practitioner. Teachers who are efficient in helping students learn in these settings improve this process. The ability to impart good feedback and carry out proper assessment is an important measure of effectiveness. Objective: The purpose of this study was to investigate the perception of students from the Faculty of Dentistry, University of Malaya towards effective clinical feedback and assessment from the staff of the Dept. of Conservative Dentistry. Method: A 4-point Likert-type scale questionnaire was formulated according to Myers, 1977 (J.Dent.Edu 41:68-76). Aspects …

Go to article

Clinical Evaluation Of A Compomer In The Restoration Of Class I And Ii Cavities In Permanent Posterior Teeth: 1-Year Results, Noor Hayaty Abu Kasim Abu Kasim N.H. Apr 2001

Clinical Evaluation Of A Compomer In The Restoration Of Class I And Ii Cavities In Permanent Posterior Teeth: 1-Year Results, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

The clinical performances of a compomer (Dyract AP") is combination with a non-rinse conditioner (K-0100”) and self-priming adhesive (K-0 I07”) were compared with a hybrid composite resin (Spectrum TPH”) in combination with a 36% phosphoric acid conditioner (DeTrey Conditioner”) and self-priming adhesive (K-0107”) in a randomized controlled split-mouth model. 23 patients with bilateral occlusal and/or interproximal caries had their teeth restored with Dyract AP in one quadrant and Spectrum TPH in the opposite quadrant by either one of the 2 evaluators. Removal of tooth structure was as dictated by caries and access. All non-caries fissures were sealed with either a …

Go to article

Thermocycling As A Means Of Inducing Mechanical Fatigue In Dental Composites, Noor Hayaty Abu Kasim Abu Kasim N.H. May 1998

Thermocycling As A Means Of Inducing Mechanical Fatigue In Dental Composites, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

The effect of thermocycling on the fatigue behaviour of 5 commercially available dental composites; P50(P)1, Silux Plus(S)2, Heliomolar(H)3, Clearfil Photo Posterior-light activated(CLA)4 and Clearfil Posterior-chemically activated(CC)5 was investigated. One hundred and ten rectangular bar specimens were prepared for each materil and divided into 11 groups of 10 each. Test groups 1-6 were subjected to 0, 250, 500, 750, 1000 and 1000 thermal cycles respectively. Each thermal cycle consisted of 1 minute immersion time of 50 seconds per change. The control groups 7-11 were stored in distilled water at 370c for the equivalent time to complete 250, 500, 750, 1000 and …

Go to article

The Radiopacity Of Dental Prostheses (Fixed And Removable) On Plain Radiographs-An Experimental Study, Noor Hayaty Abu Kasim Abu Kasim N.H. Jan 1998

The Radiopacity Of Dental Prostheses (Fixed And Removable) On Plain Radiographs-An Experimental Study, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

The impaction of dental prostheses in either the airway or esophagus is an under-recognized problem which may result in severe morbidity or even mortality. The radio-opacity and the size of fixed and removable dental prostheses in an animal carcass was investigated. Prostheses were placed one at a time in the oro-laryngopharynx or in tho trachea and the esophagus. Lateral radiographs were taken for each prosthesis in site. The radio-opacity and size of the prostheses on the radiograph was graded. Most of the prostheses investigated were radio-opaque though the removable prostheses were more likely to be radiolucent and differ in size. …

Go to article

Effect Of Thermocycling On The Fracture Toughness Of Composites, Noor Hayaty Abu Kasim Abu Kasim N.H. May 1997

Effect Of Thermocycling On The Fracture Toughness Of Composites, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

Fracture toughness has been recognised to be one of the most important mechanical property for retorative materials. It is the aim of this study to investigate the effect of thermocycling an fracture toughness of a range of dental composites; P50(P)1 , Silux Plus(S)2, Heliomolar(H)3, Clearfil Photo Posterior-light activated(CLA)4 and Clearfil Posterior-chemically activated(CC)3. 110 rectangular pre-notched specimens was prepared for each material utilising a stainless steel mould. The specimens were divided into 11 groups of 10 each. Test groups 1-6 were subjected to 0, 250, 500, 750, 1000 and 10,000 thermal cycles respectively. All specimens were subjected to a 3 point …

Go to article

Microleakage Testing, Noor Hayaty Abu Kasim Abu Kasim N.H. Jan 1997

Microleakage Testing, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

Microleakage testing has been used to determine the possible clinical performance of a restorative material. Many microleakage testing materials have been developed and performed through the years. There has been no agreement as to which testing methodology would give the most accurate results. Attempts have been made to simulate the oral conditions and to give a more quantitative representation of micro leakage. The different micro leakage testing methodologies are presented in this paper.

Go to article

A Rolling-Ball Device For Producing Surface Fatigue And Its Application To Dental Materials, Noor Hayaty Abu Kasim Abu Kasim N.H. Jan 1997

A Rolling-Ball Device For Producing Surface Fatigue And Its Application To Dental Materials, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

A new method of producing and evaluating surface fatigue using a rolling-ball device has been developed. The method involves constraining a rolling ruby ball between the ''v'' groove of a rotor and the test specimen. The ball applies a compressive stress to the surface of the test material whilst it rolls in a circular pattern across the specimen surface. The fatigue life is defined as the time taken for surface degradation to begin to occur. The method is simple and reproducible and allows fatigue data to be gathered using a relatively small number of specimens. A series of model dental …

Go to article

The Effect Of Thermocycling On The Fatigue Behavior Of Dental Composites, Noor Hayaty Abu Kasim Abu Kasim N.H. Mar 1995

The Effect Of Thermocycling On The Fatigue Behavior Of Dental Composites, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

The effect of thermocycling on the fatigue behaviour of 2 microfilled composites; Silux Plus3 and Heliomolar2 and 3 hybrid composites; P502, Cleafil Photo Posterior3 (both light-activated) and Cleafil Posterior3 (chemically-activated) was investigated using a ball mill. Ninety specimens (2 x 2 x 25mm) of each material were used. The specimes were divided into 3 groups of 30 and were stored for 24 h in water at 37oC (Group A), subjected to 104 thermal cycle over 45 days (Group B) and stored in water at 37oC for 45 days (Group C). Ten specimens of each material were tested in a 0.5 …

Go to article

Impact Strength Of An Experimental Polyurethane-Based Polymer, Noor Hayaty Abu Kasim Abu Kasim N.H. Jan 1970

Impact Strength Of An Experimental Polyurethane-Based Polymer, Noor Hayaty Abu Kasim Abu Kasim N.H.

Noor Hayaty Abu Kasim Abu Kasim N.H.

The impact strength of a newly developed experimental polyurethane-based polymer which is derived from palm oil (Experimental PU) was compared with denture polymers; heat-cured and self cured polymethyl methacrylate (PMMA) and Eclipse®, light-activated urethane dimethacrylate prosthetic resin system. Ten specimens were prepared using heat-cured PMMA (Meliodent® Heat Cure, Heraeus Kulzer, Germany), self cured PMMA (Meliodent® Rapid Repair, Heraeus Kulzer, Germany), Eclipse® baseplate resin (Dentsply, USA) and Experimental PU material. Specimens were prepared following manufacturer’s instructions except for the Experimental PU material where it was prepared in bulk and sectioned to the desired dimension, 64 x 6 x 4 mm. A …

Go to article

First Prev