Due to the low quality , small sample sizes or lack of adequate reporting of the outcome data , the evidence is inadequate to cl aim or refute a difference in postoperative sensitivity between different dental liners .
Since August 2009 , members of the Primary Care Dentistry Research Forum ( www.dentistry research .org ) have taken part in an online vote to identify questions in day-to-day practice that they felt most needed to be answered with conclusive research .
Effect of different liner treatments on postoperative sensitivity of amalgam restorations.
OBJECTIVE The purpose of this clinical study was to assess the sensitivity experienced and reported by patients following treatment of primary carious lesions with Class I or Class II amalgam restorations .  METHOD AND MATERIAL S Only previously untreated teeth were selected . The cavity preparations were treated according to one of four regimens : group 1 = no liner ; group 2 = two coats of a copal varnish ; group 3 = a dentin adhesive resin liner ; group 4 = a resin-modified glass-ionomer liner . Patients were contacted on days 2 and 7 postoperatively and question ed regarding the presence or absence of sensitivity . If sensitivity was experienced , they were asked which stimuli created the sensitivity , the length of time it lasted , and its intensity on a subjective scale . If sensitivity was experienced on day 7 , patients were also contacted on days 14 , 30 , and 90 to assess the degree of sensitivity . Nineteen teeth were included in each of the four groups . RESULTS By days 2 and 7 , no significant difference existed among groups ; by day 14 , 22 % of restorations in group 2 and 17 % of those in group 3 were sensitive , while teeth in groups 1 and 4 exhibited no sensitivity reactions . CONCLUSION Use of a resin-modified glass-ionomer liner or no dentin treatment result ed in short-term sensitivity in fewer than one third of the teeth . Almost one third of the teeth restored with a dentin adhesive resin liner or copal varnish exhibited initial sensitivity , which lasted up to 30 days in a few teeth
Due to the low quality , small sample sizes or lack of adequate reporting of the outcome data , the evidence is inadequate to cl aim or refute a difference in postoperative sensitivity between different dental liners .
Since August 2009 , members of the Primary Care Dentistry Research Forum ( www.dentistry research .org ) have taken part in an online vote to identify questions in day-to-day practice that they felt most needed to be answered with conclusive research .