title: Clinical study of Mineral Trioxide Aggregate in primary molars. Comparison between Grey and White MTA--a long term follow-up (84 months).
abstract: OBJECTIVE
  The aim of the present study was to conduct a clinical and radiographic long-term evaluation of pulpotomy in temporary molars performed with Grey and White Mineral Trioxide Aggregate (MTA) and compare the results of Grey and White MTA pulpotomies in a sample of 233 primary molars with a maximum follow-up period of 84 months.
  
  
  METHODS
  The sample was selected from patients treated at the Department of Pediatric Dentistry, Faculty of Dentistry, Complutense University of Madrid, Spain. This prospective study included first and second primary molars treated with pulpotomy with Grey or White MTA, controlled for a maximum follow-up period of 84 months. Statistical analysis of clinical and radiographic findings was completed using ANOVA (P<0.05).
  
  
  RESULTS
  Follow-up evaluations, performed every 6 months, revealed that only 2 molars treated with White MTA presented abscess and pathological mobility. Radiographic examination of the 210 molars revealed unfavourable pulp response in only 6 molars (internal or furcation root resorption), without statistically significant differences between Grey and White MTA. Two radiological findings were noticed: dentine bridge formation and partial or total root canal stenosis. Grey MTA induced a higher percentage of dentine bridges with statistically significant differences (P<0.05), and a higher percentage of pulp canal stenosis, without a statistically significant difference.
  
  
  CONCLUSIONS
  Grey and White MTA presented high levels of clinical and radiographic success. Although the present study showed evidence of a very good biologic response with both types of MTA, Grey MTA showed significantly higher number of dentine bridge formation than White MTA.
authors.affiliation: Faculty of Dental Medicine, University of Porto, Portugal. cristinalsilva@mail.telepac.pt
authors.forename: Cristina
authors.initials: C
authors.lastname: Cardoso-Silva
authors.forename: Elena
authors.initials: E
authors.lastname: Barbería
authors.forename: Myriam
authors.initials: M
authors.lastname: Maroto
authors.forename: Franklin
authors.initials: F
authors.lastname: García-Godoy
mesh_terms: D000038:Abscess / Q000209:etiology; D017607:Aluminum Compounds / Q000627:therapeutic use*; D017610:Calcium Compounds / Q000627:therapeutic use*; D003251:Constriction, Pathologic / Q000000981:diagnostic imaging / Q000473:pathology; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging / Q000473:pathology; D003809:Dentin, Secondary / Q000000981:diagnostic imaging; D004338:Drug Combinations; D005500:Follow-Up Studies; D006801:Humans; D008137:Longitudinal Studies; D008963:Molar / Q000000981:diagnostic imaging / Q000473:pathology*; D010087:Oxides / Q000627:therapeutic use*; D011183:Postoperative Complications; D011446:Prospective Studies; D011672:Pulpotomy / Q000379:methods*; D011859:Radiography; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012391:Root Resorption / Q000209:etiology; D017640:Silicates / Q000627:therapeutic use*; D014086:Tooth Mobility / Q000209:etiology; D014094:Tooth, Deciduous / Q000000981:diagnostic imaging / Q000473:pathology*; D016896:Treatment Outcome
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate