BACKGROUND: Stability of peri-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.
BACKGROUND: Stability of peri-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.
Authors: Matteo Albertini; Federico Herrero-Climent; Carmen María Díaz-Castro; Jose Nart; Ana Fernández-Palacín; José Vicente Ríos-Santos; Mariano Herrero-Climent Journal: Int J Environ Res Public Health Date: 2021-01-29 Impact factor: 3.390
Authors: H Pellicer-Chover; M Díaz-Sanchez; D Soto-Peñaloza; M-A Peñarrocha-Diago; L Canullo; D Peñarrocha-Oltra Journal: Med Oral Patol Oral Cir Bucal Date: 2019-09-01
Authors: Javier Gil; Clara Sandino; Miguel Cerrolaza; Román Pérez; Mariano Herrero-Climent; Blanca Rios-Carrasco; Jose Vicente Rios-Santos; Aritza Brizuela Journal: J Clin Med Date: 2022-02-16 Impact factor: 4.241
Authors: Ricardo Judgar; Gabriela Giro; Elton Zenobio; Paulo G Coelho; Magda Feres; Jose A Rodrigues; Carlo Mangano; Giovanna Iezzi; Adriano Piattelli; Jamil Awad Shibli Journal: Biomed Res Int Date: 2014-06-23 Impact factor: 3.411