title: Digital radiographic evaluation of the level of alveolar bone crest in external hexagon implants submitted to 2 types of implant abutments under immediate loading.
abstract: OBJECTIVE
  The aim of this study was to evaluate by means of digital radiography the behavior of the alveolar bone crest in external hexagon implants following the use of 2 different types of abutments, one for conventional cemented prosthesis and one for modified cemented prosthesis.
  
  
  METHODS
  Ten external hexagon implants (platform 4.1) were placed in 5 patients. Initial instrumentation was carried out to obtain primary stability of the temporary prostheses under immediate loading. Each patient received both abutments for conventional and modified cemented prosthesis. Standardized digital periapical radiographies were performed at times T0 (immediately after implant placement) and T1 (4 months after implant placement). A straight line was initially established from the implant platform to the distal and mesial peri-implantar marginal bone tissue (immediately in contact with the implant) and measured by digital radiography, using Sidexis version 2.3 (Sirona Dental Systems GmbH, Bensheim, Germany) software. The data were submitted to paired-samples t-test analysis.
  
  
  RESULTS
  There was no significant difference between the conventional and modified cemented prosthesis. In both cases, t-test results were within the null hypothesis level.
  
  
  CONCLUSIONS
  The abutment for the modified cemented prosthesis resulted in no significant radiographic difference of alveolar bone crest height, when compared with the conventional cemented prostheses.
authors: Department of Surgery and Integrated Clinics, Araçatuba School of Dentistry-Univ Estadual Paulista-UNESP, São Paulo, Brazil. dponzoni@foa.unesp.br
authors: Daniela
authors: D
authors: Ponzoni
authors: Rodrigo Juliano
authors: RJ
authors: Gadotti
authors: Ivete Aparecida de Mattias
authors: IA
authors: Sartori
authors: Elírio Mário
authors: EM
authors: Liotto
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging*; D000539:Alveolar Process / Q000000981:diagnostic imaging*; D002484:Cementation; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D005260:Female; D006801:Humans; D057893:Immediate Dental Implant Loading; D008297:Male; D011446:Prospective Studies; D019252:Radiography, Dental, Digital; D012984:Software; D013524:Surgical Flaps
chemical_list: D015921:Dental Implants