title: Bulk dentine replacement versus incrementally placed resin composite: A randomised controlled clinical trial.
abstract: OBJECTIVE
  This randomized controlled clinical trial compared two techniques and materials for restoring carious teeth-Bulk dentine replacement versus incremental placement of a hybrid posterior resin composite material in terms of patient comfort (post operative sensitivity and tenderness on biting).
  
  
  METHODS
  Seventy-two carious teeth were randomized to one of two treatment groups: Group A-were restored with a bulk dentine replacement material or Group B-restored with incrementally placed hybrid composite. Patients were followed up by way of a structured phone call at day 2 and day 7 post-operatively. Patients reporting discomfort at day 7 were subsequently followed up on days 14, and 30.
  
  
  RESULTS
  All patients were followed up. At day 2, 18/72 restored teeth had post-operative sensitivity; this figure fell to 10/72 at day 7. A Chi squared test revealed that at day 2 a greater level of sensitivity was reported by patients in Group A (P=0.029). However, at day 7 there was no statistically significant difference between the two groups in terms of sensitivity (P=0.453). 8/72 and 6 /72 teeth had tenderness to biting at days 2 and 7 respectively. A Chi squared test revealed no statistically significant difference between the two groups in terms of tenderness on biting at any time period (P=0.722). Interestingly, Class I cavities were found to be more tender on biting than Class II cavities. At day 30 2/72 teeth exhibited sensitivity and none of the teeth exhibiting tenderness on biting.
  
  
  CONCLUSIONS
  At day 7 there was no significant difference between the two groups in terms of postoperative sensitivity and tenderness on biting.
authors.affiliation: General Dental Practitioner, Chorley, Lancashire, UK.
authors.forename: D
authors.initials: D
authors.lastname: Hickey
authors.affiliation: Orthodontist, Eastman Dental Hospital, London, UK.
authors.forename: O
authors.initials: O
authors.lastname: Sharif
authors.affiliation: General Dental Practitioner, Fulham, London, UK.
authors.forename: F
authors.initials: F
authors.lastname: Janjua
authors.affiliation: Dean, Faculty of Dentistry, Sir John Walsh Research Institute, University of Otago, New Zealand. Electronic address: paul.brunton@otago.ac.nz.
authors.forename: P A
authors.initials: PA
authors.lastname: Brunton
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003188:Composite Resins; D003731:Dental Caries / Q000145:classification / Q000628:therapy*; D003737:Dental Cavity Preparation / Q000379:methods; D003764:Dental Materials; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000009:adverse effects / Q000379:methods*; D003804:Dentin; D003807:Dentin Sensitivity; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D003188:Composite Resins; D003764:Dental Materials
keywords: Clinical trial; Dentine; Resin composite; Sensitivity