|
11. Alternative surgical approach to prevent tmj clicking
Khalid Al-Ruhaimi, A. Lewis Nwoku,
Division of oral and Maxillofacial Surgery, Department of Biomedical Dental Department, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia.
Numerous surgical methods have been proposed for treatment of clicking of the temporomandibular joint. This paper describes a surgical technique for treatment of audible and painful clicking that occurs with wide opening. The method is a modification of Gosserez and Dutrey (1967) and the original of Leclerc and Girard (1943) for augmentation of the tubercle. Indications and advantages of this method are illustrated and described.
Saudi Dental Journal 1992;4(SI)-Abstr.11:p12.
12. Incidence of enamel decalcification following bonded orthodontic treatment
J. B. Douglass, E. B. DeVol, S. L. Reid,
Dental Department, King Faisal Specialist Hospital and Research Center, P.O. Box 3354, Riyadh 11211, Saudi Arabia.
The purpose of this study was to determine the incidence of tooth enamel decalcification following the placement of bonded orthodontic appliances in a group of Saudi patients. 70 Saudi Arabian nationals participated in this study. All were examined for enamel decalcification by one orthodontist. 50 persons constituted the experimental group (1 2 males, 38 females; age x = 18yrs., R:12-34 yrs.) and 20 persons for the control group (10 males and 10 females; age x = 14yrs, K:9-33yrs.).
At the start of the study, the first 50 orthodontic patients that met the following criteria were included into the experimental group : all patients had bonded edgewise appliances (including the molars) and had the appliances removed prior to the examination. The control group was selected as 20 consecutive patients that met the following criteria : no previous orthodontic treatment and at least 12 permanent teeth erupted. 84% of the orthodontic patients had at least one tooth affected (evidence of decalcification) compared to 50% of the subjects in the control group. 529 of the 1101 teeth examined in the experimental group were affected (48.1%) compared to 51 out of 423 teeth in the control group (12.1%). The difference between the groups was statistically significant (p < .01). We conclude that some Saudi Arabians may be at risk for an increased incidence of tooth enamel damage as a result of orthodontic treatment.
Saudi Dental Journal 1992;4(SI)-Abstr.12:p13.
13. Normal anthropometric measurements in saudi arabian schoolgirls
Ibrahim M. Masoud, N. Alamoudi, R. Feteih, M. Ardawi,
Faculty of Dentistry, King Abdul Aziz University, P.O. Box 6589, jeddah, Saudi Arabia.
The development of norms and standards is of utmost importance in the evaluation of health and disease. The widely used anthropometric standards are derived from studies done on European and North American populations. Such populations show obvious differences from populations residing in Saudi Arabia, e.g., Saudi boy of average height (50th percentile) is expected to fall in a lower percentile when compared to the American standard. Such population differences are well documented and are known to depend on a variety of genetic and environmental factors.
The purpose of this research was to develop normal standards for the population examined.
Anthropometric measurements including standing height, body weight, head circumference, arm circumference and skin-fold measurements were performed on 5,153 schoolgirls in the age range of 6-16 years from six schools in leddah, Saudi Arabia.
Charts and tables showing the distributions of the different parameters were produced together with percentile charts. Comparisons were made between the newly developed normal charts and standard charts obtained from other populations.
Saudi Dental Journal 1992;4(SI)-Abstr.13:p14.
14. Cuspid retraction and bracket angulation as applied to straight wire edgewise appliance
Georges Crego,
Division of Orthodontics, Department of Preventive Dental Sciences, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia.
Most orthodontists who use the Edgewise appliance agree that it is desirable to eliminate, as far as possible, those procedures in arch wire fabrication which are difficult to reproduce in subsequent arch wire changes. The problem of bracket angulation could be better understood if approach from a certain number of clinical aspects.
This paper will deal with bracket angulation as an aid in paralleling roots adjacent to extraction spaces.
Saudi Dental Journal 1992;4(SI)-Abstr.14:p15.
15. Assessment of dental arch crowding with a travelling microscope
Zuhair Murshid, S.N.Bhatia,
Department of Preventive Dental Sciences, College of Dentistry, KingSaudUniversity, P.O. Box60169, Riyadh 71545, Saudi Arabia
The usefullness of a computer-linked travelling microscope was evaluated in the measurement of dental arch crowding. The measurements made from X and Y coordinates with the occlusal points from 30 pairs of dental casts with varying degrees of crowding were compared with those made directly with calipers. It was found out that the microscope underestimated the total mesiodistal tooth width by an average of 1.34 mm, but not the arch size, therefore it also underestimated crowding. The underestimation reduced to 0.58 mm when tilting of teeth using marginal ridges were taken into account. The error (S.D) of overall crowding was lower for the microscope (0.92 mm) against (1.13 mm) for the calipers. It was interesting that this error was found to be 1.92 mm using a reflex metrograph (Richmond S. Am. J. Orthod. (92) 199-206, 1987).
From the recorded coordinates, a comprehensive analysis of the dental cast data is provided under the fingertips such as inter-canine and inter-molar width, arch perimeter length and form. In conclusion, the consistency and versatility of the microscopic method used is a useful tool for analyzing dental casts especially for research purposes.
Saudi Dental Journal 1992;4(SI)-Abstr.15:p16.
|