Does dental scaling have proven clinical benefits

[TallPoppy]

Is dental scaling and periodontal pockets cleaning one and the same? if so does scaling have proven researched benefits to the patient or is it just clinical evidence not supported empirically.

I find it difficult to look for unbiased information of scaling on the net, any links would be great. For example if an article starts praising scaling slowly it veers to being a proponent of ultrasonics.

Thanks all for your help!