Equicrestal and Subcrestal Dental Implants: A Histologic and Histomorphometric Evaluation of Nine Retrieved Human Implants
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
19/10/2012
19/10/2012
2011
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Resumo |
Background: Stability of pen-implant crestal bone plays a relevant role relative to the presence or absence of interdental papilla. Several factors can contribute to the crestal bone resorption observed around two-piece implants, such as the presence of a microgap at the level of the implant abutment junction, the type of connection between implant and prosthetic components, the implant positioning relative to the alveolar crest, and the interimplant distance. Subcrestal positioning of dental implants has been proposed to decrease the risk of exposure of the metal of the top of the implant or of the abutment margin, and to get enough space in a vertical dimension to create a harmoniously esthetic emergence profile. Methods: The present retrospective histologic study was performed to evaluate dental implants retrieved from human jaws that had been inserted in an equicrestal or subcrestal position. A total of nine implants were evaluated: five of these had been inserted in an equicrestal position, whereas the other four had been positioned subcrestally (1 to 3 mm). Results: In all subcrestally placed implants, preexisting and newly formed bone was found over the implant shoulder. In the equicrestal implants, crestal bone resorption (0.5 to 1.5 mm) was present around all implants. Conclusion: The subcrestal position of the implants resulted in bone located above the implant shoulder. J Periodontol 2011;82:708-715. National Research Council, Rome, Italy Ministry of Education, University, Research, Rome, Italy |
Identificador |
JOURNAL OF PERIODONTOLOGY, v.82, n.5, p.708-715, 2011 0022-3492 http://producao.usp.br/handle/BDPI/26393 10.1902/jop.2010.100450 |
Idioma(s) |
eng |
Publicador |
AMER ACAD PERIODONTOLOGY |
Relação |
Journal of Periodontology |
Direitos |
restrictedAccess Copyright AMER ACAD PERIODONTOLOGY |
Palavras-Chave | #Bone remodeling #dental abutments #dental implants #histology #osseointegration #CRESTAL BONE CHANGES #COLLAGEN FIBER ORIENTATION #MORSE CONE CONNECTION #TITANIUM IMPLANTS #INTERIMPLANT DISTANCES #HISTOMETRIC EVALUATION #SUBMERGED IMPLANTS #RADIOGRAPHIC EVALUATION #PAPILLA FORMATION #PLACEMENT DEPTH #Dentistry, Oral Surgery & Medicine |
Tipo |
article original article publishedVersion |