title: Stainless steel crown versus modified open-sandwich restorations for primary molars: a 2-year randomized clinical trial.
abstract: OBJECTIVE
  The aim of this study was to investigate the clinical performance and survival of stainless steel crown (SSC) restoration and modified open-sandwich technique using resin-modified glass ionomer cement.
  
  
  METHODS
  Randomized clinical trial.
  
  
  METHODS
  General dental practice.
  
  
  METHODS
  A total of 87 children aged 4-7 years at baseline with one or more primary molars that have undergone pulp therapy were randomly assigned to receive either SSC or modified open-sandwich restoration. One hundred and sixty restorations were placed and evaluated after 6, 12, 18, and 24 months using the Ryge criteria.
  
  
  RESULTS
  Comparable survival rates were observed for both SSC and modified open-sandwich restoration. With only four SSCs and six modified open-sandwich restorations failing over 24 months, the survival rates were high for both materials (2-year survival rate: 95.0% for SSCs and 92.5% for modified open-sandwich restorations). Significantly better gingival health (P < 0.05) was observed for the modified open-sandwich restorations compared with SSCs, as only one modified open-sandwich restoration was rated Charlie compared to 13 SSCs. No significant differences were observed between the two materials for marginal integrity, proximal contact, occlusion, or recurrent caries.
  
  
  CONCLUSIONS
  The 2-year results indicated that the modified open-sandwich restoration is an appropriate alternative to SSC in extensive restorations, particularly where aesthetic considerations are important.
authors.affiliation: Dental Department, Dammam Medical Center, Saudi Electricity Company, Dammam, Eastern Province, Saudi Arabia. maatieh@gmail.com
authors.forename: Momen
authors.initials: M
authors.lastname: Atieh
mesh_terms: D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D003442:Crowns; D019140:Dental Care for Children / Q000379:methods; D003731:Dental Caries / Q000628:therapy*; D018772:Dental Marginal Adaptation; D019232:Dental Restoration Failure; D019554:Dental Restoration Wear; D003793:Dental Restoration, Permanent / Q000379:methods*; D005260:Female; D005459:Fluorides / Q000008:administration & dosage; D005899:Glass Ionomer Cements / Q000737:chemistry / Q000627:therapeutic use*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008963:Molar; D011672:Pulpotomy; D019279:Resin Cements / Q000737:chemistry / Q000627:therapeutic use*; D013193:Stainless Steel; D016019:Survival Analysis; D014094:Tooth, Deciduous; D019553:Tooth, Nonvital / Q000628:therapy; D016896:Treatment Outcome
chemical_list: D005899:Glass Ionomer Cements; D019279:Resin Cements; D013193:Stainless Steel; D005459:Fluorides