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document
Clinical evaluation of two adhesive composite cements for the suppression of dentinal cold sensitivity . STATEMENT OF PROBLEMS Postoperative cold sensitivity after the cementation of indirect restorations with composite cements has been reported frequently but not scientifically documented . PURPOSE This controlled clinical study was designed to simulate the dentin/composite cement interface immediately after cementation of a cast restoration . The desensitizing capabilities of a composite cement that contains a self-etching , dual-polymerizing resin adhesive system were compared with those of a composite cement that use phosphoric acid etching followed by a single-bottle , light-activated primer/resin-based adhesive . MATERIAL AND METHODS The hypersensitive root surfaces of selected teeth were randomized to receive 1 of 3 treatments : coating with a self-etching adhesive ( Linkmax ) and its respective cement , coating with a conventionally etched adhesive ( RelyX ARC ) and its cement , or no treatment ( negative control ) . The sample size was 22 . Dentin sensitivity was ascertained with an accurate cold testing device that slowly decreased in temperature . Tooth sensitivity was measured both immediately and at 7 days after placement . Two-way analysis of variance and Fisher 's least significant difference test ( P < .05 ) were used to determine whether significant differences existed as a function of treatment type or time . RESULTS Immediately after placement , the self-etching adhesive and its respective cement resulted in more suppression of cold sensitivity than no treatment ( control ) ; with Linkmax treatment , the temperature at which teeth responded was reduced by 8.4 degrees C. The conventionally etched adhesive and its cement reduced the temperature at which teeth responded by 9.4 degrees C. After 1 week , these temperature reductions were 7.0 degrees C and 4.3 degrees C , respectively . Untreated controls at the 2 intervals showed a mean decrease in sensitivity to cold of 3.6 degrees C and 4.1 degrees C. Statistical analysis showed type of composite cement to be a significant factor . CONCLUSION Within the limitations of this study and in comparison to untreated control teeth , Linkmax treatment resulted in a significant reduction in tooth root sensitivity over 1 week ( P=.02 ) , whereas RelyX ARC did not ( P=.066 ) .
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Intervention_Physical
composite cements
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Intervention_Pharmacological
phosphoric acid
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Intervention_Physical
coating with a self-etching adhesive ( Linkmax ) and its respective cement
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Intervention_Physical
coating with a conventionally etched adhesive ( RelyX ARC ) and its cement , or
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Intervention_Control
no treatment
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Intervention_Physical
self-etching adhesive and its respective cement
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Intervention_Physical
etched adhesive and its cement
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Intervention_Physical
Linkmax
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Intervention_Control
treatment
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Outcome_Physical
suppression of dentinal cold sensitivity .
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Outcome_Physical
Dentin sensitivity
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Outcome_Physical
suppression of cold sensitivity
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Outcome_Physical
temperature at which teeth responded
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Outcome_Physical
temperature reductions
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Outcome_Physical
decrease in sensitivity to cold
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Outcome_Physical
tooth root sensitivity
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Participant_Condition
dentinal cold sensitivity .
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Participant_Condition
Postoperative cold sensitivity after the cementation of indirect restorations with composite cements
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Participant_Sample-size
sample size was 22