The advantages and disadvantages of running a clinical trial in general practices

@article{Jones2004TheAA,
  title={The advantages and disadvantages of running a clinical trial in general practices},
  author={C S Jones and Richard William Billington and Gavin J Pearson},
  journal={British Dental Journal},
  year={2004},
  volume={197},
  pages={311-313}
}
This paper reviews the experiences encountered in running a clinical trial on the use of a metal reinforced glass-ionomer cement in general dental practices. The practitioners were asked to place both the test material and amalgam in the same patient and to take impressions both at placement and at three recall intervals. Subsequently plaster casts were produced from these impressions. These were then assessed by three independent observers to provide evaluation of the relative wear of the two… 

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