title: An investigation of heat transfer to the implant-bone interface related to exothermic heat generation during setting of autopolymerizing acrylic resins applied directly to an implant abutment.
abstract: Excessive heat generation at the implant-bone interface may cause bone damage and compromise osseointegration. Autopolymerizing acrylic resins are commonly used intraorally to join impression copings and suprastructure components for soldering. The effect of heat generation at the implant surface related to the exothermic setting reaction of autopolymerizing acrylic resins applied to an attached abutment was examined in vitro. Two brands of autopolymerizing acrylic resin, Duralay and GC Pattern Resin, were compared. Acrylic resin was applied to a titanium alloy abutment connected to a titanium alloy cylindric implant in varying controlled volumes, with both bulk application and brush paint-on techniques. The implant was embedded in an acrylic resin mandible in a 37 degrees C water bath. Temperature changes were recorded via embedded thermocouples at the cervical and apical of the implant surface. Analysis of variance for repeated measures was used to compare treatment groups. A mean maximum increase in temperature of 4 to 5 degrees C was seen at the implant cervical for both materials, with a maximum temperature increase of 6 degrees C. No difference between Duralay and GC Pattern Resin was seen, except for bulk application to medium-sized copper bands at the implant cervical (P < .05). No difference between the bulk and brush techniques was seen for all options, except for GC, where bulk application to medium-sized copper bands produced higher temperatures than the brush technique (P < .05). Spray coolant reduced temperatures for bulk application of both Duralay and GC (P < .05).
authors.affiliation: Department of Prosthetic Dentistry, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
authors.forename: Z
authors.initials: Z
authors.lastname: Ormianer
authors.forename: B Z
authors.initials: BZ
authors.lastname: Laufer
authors.forename: J
authors.initials: J
authors.lastname: Nissan
authors.forename: M
authors.initials: M
authors.lastname: Gross
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000497:Alloys; D000704:Analysis of Variance; D001831:Body Temperature / Q000502:physiology*; D003080:Cold Temperature; D003300:Copper / Q000737:chemistry; D000044:Dental Abutments; D003722:Dental Alloys / Q000737:chemistry; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry; D004735:Energy Transfer; D006358:Hot Temperature; D006801:Humans; D008334:Mandible / Q000502:physiology*; D008768:Methylmethacrylates / Q000737:chemistry; D008953:Models, Anatomic; D013499:Surface Properties; D013821:Thermometers; D014025:Titanium / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D000497:Alloys; D003722:Dental Alloys; D015921:Dental Implants; D003764:Dental Materials; C082318:GC Pattern Resin; D008768:Methylmethacrylates; C031462:titanium alloy (TiAl6V4); C034578:Duralay; D003300:Copper; D014025:Titanium