1,390 research outputs found
Physical properties of root-canal filling materials
No full textRoot canal filling materials are used to obturate the root canal space. Several studies have been made in
order to investigate their physical properties. A general review of these properties are discussed in this
paper.Corresponding Author:
Prof. Saad Al Nazhan,
College of Dentistry, Department of Restorative Dental Sciences, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia.
Email: [email protected]
Prevalence of pulp stones in Saudi adults
No full textPulp stones (denticles) are
discrete calcified aggregates
that occur most frequently in the
dental pulp"'. They are found in
healthy, diseased and sometimes
unerupled teeth'2 ' . Their number
appear to increase with increasing
age. They are usually detected during
radiographic examination as a
radiopaque masses of variable sizes
and shape.Corresponding Author:
Prof. Saad Al Nazhan, Professor, Department of Restorative Dental Sciences, Endodontics Division, King Saud University, College of Dentistry, P.O. Box 60169, Riyadh 11545, Saudi Arabia. Email: [email protected]
Commentary on Bamat et al
No full textSaad, ED (corresponding author), Int Inst Drug Dev, Ave Prov 3, Louvain La Neuve, Belgium.
[email protected]
The prevalence of two canals in mesial root of endodontically treated maxillary first molars among a Saudi Arabian sub-population
No full textThe aim of this in vivo study was to assess the incidence of two root canals in the mesial root of the endodontically treated permanent maxillary first molars of a Saudi Arabian sub-population. A clinical study of 352 root-canal treated permanent maxillary first molars was conducted. The teeth were examined clinically and radiographically. The results showed that 23.3 % of the examined teeth had two canals in the mesial root (17.0 % with one apical foramen and 6.3 % with two separate foramens). The occurrence of two canals in the mesial root of the maxillary first molar of a Saudi Arabian sub-population was within the normal range.Corresponding Author:
Prof. Saad Al Nazhan, Professor, Department of Restorative Dental Sciences, Endodontics Division, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia. Email: [email protected]
Prognosis of endodontic surgery of failed cases treated by root canal therapy
No full textOne hundred and eighty-four teeth treated by endodontic periradicular surgery by different operators were followed-up for 2
to 6 years. Clinical and radiographic examinations were used to assess the success of the therapy. The treatment results
were considered successful in 78.3%. The maxillary anterior and mandibular molar teeth were the most commonly treated
teeth. Apicectomy with retrograde amalgam filling was the most dominant type of endodontic surgery performed with
86.4% rate of success. The main conclusion is that retro fill should be used whenever possible. In addition, complete canal
debridement and excellent orthograde fills of the root canal system obtained before performing the periradicular surgery
will enhance the success rate of the surgery.Corresponding Author:
Prof. Saad Al Nazhan, Professor, Department of Restorative Dental Sciences, Endodontics Division, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia. Email: [email protected]
A computer package for computing the confidence limits of a measured factor
No full textCollege of Engineering, King Saud University, Saudi ArabiaThis paper is concerned with the development of a computer algorithm for computing the range of values of the confidence limits for a repeatedly measured factor. The paper briefly reviews the theory of the confidence limits for both large and small sample sizes. The presented algorithm uses the theory to compute confidence limits, for both large and small sample sizes. The algorithm is simple to program in any computer language, and it saves its users from having to resort to using statistical tables. Keywords: Confidence Limits; Measurements; Algorithms
IT-governance practices: COBIT
No full textWith the increasing dependence of enterprises on IT, and
with the widely spreading use of e-business, IT governance is
attracting increasing worldwide attention. A proper IT governance
would promote enterprise performance through intelligent and efficient
utilization of IT. In addition, standard IT governance practices would
provide a suitable open environment for e-business that provides
compatibility for inter-enterprise interaction. This review is concerned
with introducing the current state of IT governance, in four main
steps. First, the review identifies what is meant by IT governance, and
presents the main organizations concerned with its development,
namely: ISACA (Information Systems Audit and Control Association)
and ITGI (Information Technology Governance Institute). Secondly,
the review highlights COBIT (Control Objectives for Information and
related Technologies) the widely acknowledged IT governance
framework, produced by ITGI. Thirdly, the current state of COBIT use
is addressed using a recent global survey. Finally, comments and
recommendations on the future development of IT governance are
concluded.King Abdul Aziz City for science & TechnologyCorresponding Author:
Prof. Saad Haj Bakry, Department of Electrical Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia.
Email: [email protected]
Scanning electron microscope evaluation of the cut root surface and root end preparation using various techniques
No full textHanan Ballcx BDS, Saad Al-Nazhan, BDS, MSB
King Saud University College of Dentistry, P.O.Box 60169, Riyadh, Saudi ArabiaRoot end preparation was performed in the apical third of 20 endodontically treated extracted human teeth using high speed, low speed, straight surgical low speed handpieces and ultrasonic machine. The surface properties of the cut root surface was evaluated using a scanning electron microscope (SEM). In addition, the degree of superficial debris and those retained in the cavity of the retropreparation was also examined. Results showed that the smoothest cut surface with minimal debris was produced by #169 plain tapered fissure bur on both high and low speed handpieces. The ultrasonic tip disturbs the gutta-percha filling. Frequent and continuous irrigation is better used during the cutting procedure to remove a greater amount of debris
Frequent attendance in primary health care centers: Prevalence, patients characteristics and associated factors
No full textAssistant Professor
Department of Public Administration
College of Administrative Sciences
King Saud University, Riyadh, Saudi ArabiaObjectives: To determine the prevalence of frequent attendance at primary health care (PHC) centres and to determine the variables
which may discriminate between frequent and non-frequent users.
Methods: The study employed a self-administered questionnaire to collect data from patients aged 18 years or older who visited a PHC centre in Riyadh City. The questionnaire was designed to collect data on a number of variables including
socio-demographic, access-related and health-related variables. In addition to the
descriptive statistics, stepwise discriminant analysis was used to determine the
variables which may discriminate between frequent and non-frequent users. Results: The results show that a small group of patients accounted for a high proportion of the workload in the PHC centre. Results of the stepwise discriminant
analysis show that eight of the 16 variables were statistically significant discriminating variables between frequent and non-frequent users.
Conclusion: The study highlights the importance of factors which motivate patients to attend PHC centres frequently. Health policy makers should understand
these factors before implementing any intervention plans which attempt to persuade
people to modify their health-seeking behaviour. Further research is needed to expand this study, and, in particular, to examine the appropriateness of visits made
by the frequent users
Metabolism of archidonic acid by 5-lipoxygenase in guinea-pig lung
No full textPT: J; CR: BURKA JF, 1981, PROSTAG OTH LIPID M, V22, P683 BURKA JF, 1983, J PHARMACOL EXP THER, V225, P427 PARKER CW, 1982, BIOCHEM BIOPH RES CO, V109, P1011 SAAD MH, 1983, PROSTAGLANDINS, V25, P741 SAAD MH, 1984, EUR J PHARMACOL, V100, P13 SCHIANTARELLI P, 1981, EUR J PHARMACOL, V73, P363; NR: 6; TC: 6; J9: PROSTAGLANDINS; PG: 2; GA: TU225Source type: Electronic(1
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