title: Influence of Implant transmucosal design on early peri-implant tissue responses in beagle dogs.
abstract: OBJECTIVE
  This study was undertaken to evaluate the influences of concave, machined and concave-roughened profiles of transmucosal implant designs on early peri-implant tissue responses.
  
  
  METHODS
  Implants were used and classified by transmucosal profile and surface type as straight-machined implants (SM), concave-machined implants (CM), or concave-roughened implants (CR). A total of 30 implants (10 per each type) with matching transmucosal profiles were placed directly on alveolar crests in randomized order in the edentulous mandibular ridges of three beagle dogs. Healing abutments were connected 4 weeks after implant placement, and prostheses were connected 8 weeks after implant placement and functionally loaded. All animals were sacrificed at 16 weeks. Peri-apical radiographs were obtained and measured to evaluate peri-implant marginal bone levels. Histological specimens were prepared to measure bone resorption, connective tissue contact, epithelial tissue height, biological width, and length of implant-abutment junction to the apical portion of junctional epithelium.
  
  
  RESULTS
  Radiographic and histometric analysis showed that least bone resorption occurred around CM implants and greatest bone resorption around SM implants (P < 0.05). Histometric analysis showed that highest connective tissue attachment and shortest biological width had formed around CM implants.
  
  
  CONCLUSIONS
  Concave-machined profiled implants with a transmucosal design may induce less bone resorption and better connective tissue attachment around implants than the straight-machined profiled implants during the early healing phase.
authors: Department of Prosthodontics, School of Dentistry, Pusan National University, Yangsan, South Korea.
authors: Jung-Bo
authors: JB
authors: Huh
authors: Gun-Bak
authors: GB
authors: Rheu
authors: Young-Soo
authors: YS
authors: Kim
authors: Chang-Mo
authors: CM
authors: Jeong
authors: Jeong-Yeol
authors: JY
authors: Lee
authors: Sang-Wan
authors: SW
authors: Shin
mesh_terms: D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging; D000539:Alveolar Process / Q000033:anatomy & histology; D000818:Animals; D003238:Connective Tissue / Q000033:anatomy & histology; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D004285:Dogs; D004846:Epithelial Attachment / Q000033:anatomy & histology; D005881:Gingiva / Q000033:anatomy & histology; D008334:Mandible / Q000000981:diagnostic imaging / Q000601:surgery*; D011859:Radiography; D011897:Random Allocation; D013499:Surface Properties
chemical_list: D015921:Dental Implants
keywords: bone resorption; connective tissue contact; dental implants; transmucosal design