title: Influence of crown shape on root coverage therapy.
abstract: OBJECTIVE
  The aim of this study was to evaluate the influence of the crown shape on the outcomes of root coverage procedures.
  
  
  METHODS
  Eighty patients with Miller class I gingival recessions in maxillary canines or premolars were selected. The recession areas were treated using the subepithelial connective tissue grafting. The following clinical parameters were analyzed: crown length (CL) and width (CW), recession height and width, probing depth, clinical attachment level, width and thickness of the keratinized tissue and percentage of root coverage achieved. These measurements were recorded at baseline and 6 months after the surgical procedure. The CW/CL ratio was calculated for each tooth and the median obtained (0.83). Patients were then ranked into two groups, according to the shape of the tooth with gingival recession: Group A - square crown shape (CW/CL values above 0.83) and Group B - long and narrow crown shape (CW/CL values below 0.83).
  
  
  RESULTS
  No statistically significant differences (p>0.05) were found between groups in any of the clinical parameters at baseline. After 6 months, both groups presented improved clinical outcomes for all parameters analyzed compared to baseline (p>0.05). The mean percentages and standard deviations of root coverage achieved in Group A and Group B was 91.37 (16.75) and 85.49 (23.55), respectively (p>0.05).
  
  
  CONCLUSIONS
  Crown shape did not influence the root coverage obtained with the subepithelial connective tissue graft technique.
authors: Department of Periodontics, Piracicaba Dental School, State University of Campinas, Piracicaba, SP, Brazil.
authors: Maria Fernanda Santos
authors: MF
authors: Peres
authors: Erica Del Peloso
authors: Edel P
authors: Ribeiro
authors: Sandro
authors: S
authors: Bittencourt
authors: Enilson Antônio
authors: EA
authors: Sallum
authors: Antônio Wilson
authors: AW
authors: Sallum
authors: Francisco Humberto
authors: FH
authors: Nociti-Júnior
authors: Márcio Zaffalon
authors: MZ
authors: Casati
mesh_terms: D000328:Adult; D003442:Crowns; D005260:Female; D005882:Gingival Diseases / Q000628:therapy*; D006801:Humans; D008297:Male; D014092:Tooth Root