The purpose of this pilot study was to examine if tablet technology with accompanying instructional videos enhanced the teaching and learning outcomes in a preclinical dental laboratory setting. Two procedures deemed most challenging in Operative Dentistry II were chosen for the development of instructional videos. A random sample of thirty students was chosen to participate in the pilot. Comparison of faculty evaluations of the procedures between the experimental (tablet) and control (no tablet) groups resulted in no signiicant differences; however, there was a trend toward fewer failures in the experimental group. Examination of the ability to accurately self-assess was compared by exploring correlations between faculty and student evaluations. While correlations were stronger in the experimental group, the control group had signiicant correlations for all three procedures, while the experimental group had signiicant correlations on only two of the procedures. Students strongly perceived that the tablets and videos helped them perform better and more accurately self-assess their work products. Students did not support requiring that they purchase/obtain a speciic brand of technology. As a result of this pilot study, further development of ideal and non-ideal videos are in progress, and the school will be implementing a "Bring Your Own Device" policy with incoming students.

This paper reports 16 cases of subperiosteal abscesses of the orbit due to acute sinusitis in childhood. They comprise 12.4% of 129 patients presenting with an 'acute orbit'. Acute ethmoidal sinusitis was the predominant cause. The typical clinical features, as well as CT scanning of the paranasal sinuses, orbit and brain, should assist in early diagnosis. If possible, the subperiosteal abscess and sinuses should be drained before loss of visual acuity or intracranial complications occur. Streptococcus milleri was the pathogen most commonly cultured. One patient in this series had intracranial complications, but no other patients had major complications and there were no deaths.

This paper reports 16 cases of subperiosteal abscesses of the orbit due to acute sinusitis in childhood. They comprise 12.4% of 129 patients presenting with an 'acute orbit'. Acute ethmoidal sinusitis was the predominant cause. The typical clinical features, as well as CT scanning of the paranasal sinuses, orbit and brain, should assist in early diagnosis. If possible, the subperiosteal abscess and sinuses should be drained before loss of visual acuity or intracranial complications occur. Streptococcus milleri was the pathogen most commonly cultured. One patient in this series had intracranial complications, but no other patients had major complications and there were no deaths.

A modified sub-surface pump is presented with improved gas handling characteristics, and with the ability to flush sand and small particulate matter away from the leading edge of the plunger. The pump design utilizes a tubular hollow valve rod and precision sizing of the guide to create a low pressure chamber above the plunger on the down-stroke. The two stage gas and sand check valve installed at the top open cage reduces buckling tendency on long stroke down-hole pumps, and actually eliminates the buckling on shorter strokes and shallow wells. Buckling of valve rods is discussed and a method cf calculating the buckle point for the various plunger and valve rod sizes, and the longer stroke lengths are presented. The modified hollow valve rod pump with the two stage gas and sand check valve has actually performed in high gas-oil ratio rod pumped wells, under a packer. Brief case histories are discussed in support of the application of this pump to wells where total fluid is produced through the pump. A review of the basic API pumps with design advantages and disadvantages in down-hole conditions is given. Accessory items to help the basic pumps in handling gas-sand and corrosion are reviewed. These are economical devices, proven over a period of years, that can be readily applied to standard sub-surface pumps.