title: Pulp reactions to different preparation techniques on teeth exhibiting periodontal disease.
abstract: To evaluate the histopathological outcome of two preparation techniques (featheredge preparation/shoulder preparation) on teeth exhibiting pulp reactions due to age and periodontal disease, 11 teeth were prepared for full veneer crowns. Laboratory made resin crowns were fixed with a zinc phosphate cement for a period of 90 days. After extraction, adjacent pulpal areas were histopathologically rated according to the BRD criteria comprising the parameters (i) Bacterial invasion, (ii) Regenerative parameters, (iii) Degenerative parameters. Degenerative reactions were more correlated with tooth preparation than with advanced periodontal disease. The severity of endondontal reactions depends more on remaining dentin thickness than on the type of preparation.
authors.affiliation: Department of Prosthodontics, School of Dental Medicine, University of Witten/Herdecke, Alfred Herrhausen Str. 50, 58448 Witten, Germany. dagmark@uni-wh.de
authors.forename: A
authors.initials: A
authors.lastname: Zöllner
authors.forename: P
authors.initials: P
authors.lastname: Gaengler
mesh_terms: D000180:Acrylic Resins; D000367:Age Factors; D001419:Bacteria / Q000302:isolation & purification; D002484:Cementation; D003188:Composite Resins; D003442:Crowns; D003782:Dental Pulp / Q000382:microbiology / Q000473:pathology*; D003788:Dental Pulp Diseases / Q000150:complications; D003801:Dental Veneers; D003804:Dentin / Q000473:pathology; D003809:Dentin, Secondary / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010510:Periodontal Diseases / Q000150:complications*; D012038:Regeneration; D019231:Tooth Preparation, Prosthodontic / Q000379:methods*; D014092:Tooth Root / Q000473:pathology; D015036:Zinc Phosphate Cement
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; C046981:ESPE Visio-Gem; D015036:Zinc Phosphate Cement