title: Evaluation of the Sealing Capability of the Implant Healing Screw by Using Real Time Volatile Organic Compounds Analysis: Internal Hexagon Versus Cone Morse.
abstract: Implant sealing capability is a crucial issue in assessment of implant success and peri-implant marginal bone loss. Clinical studies demonstrated presence of viable bacteria in the internal part of functioning implants during tissue healing. For this study, a volatile organic compounds (VOCs) emission test was developed to evaluate the existing "seal" between implant and healing screw. Two kinds of implant-screw connection were compared: 1) internal hexagon; and 2) cone Morse.
  
  
  
  Fifteen patients were enrolled in the study, three males and 12 females, who required fixed prosthetic rehabilitation. A total of 37 implants was placed, 23 with a cone Morse taper internal connection and 14 with a screw-retained internal hexagon abutment. VOCs real-time measures were performed in the implant site immediately after removing the healing screw.
  
  
  
  Statistical analysis was carried out. Results showed VOCs maximum peak amplitude in cone Morse versus internal hexagon showed significant difference (P <0.001), whereas VOCs time to peak showed no significant difference (P = 0.7).
  
  
  
  Use of the new methodology for the VOCs emission test may lead to important new data for understanding how the "failed" attachment of implant components, in two-part assemblies, may contribute to implant losses. In particular, study results support the hypothesis that the microgap of the implant-screw healing junction could cause differences in bacterial penetration. VOCs emission test evaluation represents a new diagnostic tool with an effective approach to quickly analyze, in real time, sealing capability of dental implants with healing screw interfaces.
authors.affiliation: Department of Medical, Oral and Biotechnological Sciences and Center for Research on Aging and Translational Medicine, "G. D'Annunzio" University of Chieti-Pescara, Chieti, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Scarano
authors.affiliation: Department of Medical, Oral and Biotechnological Sciences and Center for Research on Aging and Translational Medicine, "G. D'Annunzio" University of Chieti-Pescara, Chieti, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Lorusso
authors.affiliation: Department of Neuroscience, Physiology and Physiopathology Section, Imaging and Clinical Science, "G. D'Annunzio" University of Chieti-Pescara.
authors.forename: C
authors.initials: C
authors.lastname: Di Giulio
authors.affiliation: Department of Neuroscience, Physiology and Physiopathology Section, Imaging and Clinical Science, "G. D'Annunzio" University of Chieti-Pescara.
authors.forename: A
authors.initials: A
authors.lastname: Mazzatenta
mesh_terms: D001863:Bone Screws; D000044:Dental Abutments; D059605:Dental Implant-Abutment Design; D015921:Dental Implants; D006801:Humans; D008297:Male; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D015921:Dental Implants; D055549:Volatile Organic Compounds
keywords: Bone remodeling; volatile organic compounds