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Article

One Abutment One Time: A Multicenter, Prospective, Controlled, Randomized Study

1
Advanced Periodontics, Facultad de Odontología, Universidad de Sevilla, C/Avicena S/N, 41009 Seville, Spain
2
Technological Health Research Center, Biomaterials of the Faculties of Medicine and Dentistry, International University of Cataluña, 08034 Barcelona, Spain
3
Department of Biostatistic, Dental School, Universidad de Sevilla, 41009 Sevilla, Spain
4
Porto Dental Institute, 4150-518 Porto, Portugal
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(24), 9453; https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph17249453
Received: 11 November 2020 / Revised: 13 December 2020 / Accepted: 14 December 2020 / Published: 17 December 2020
(This article belongs to the Special Issue Implant-Prosthetic Rehabilitation and Maintenance)
Aim: (PRIMARY) Assess the changes in bone level (6 and 12 months after implant placement) between the test (definitive abutment (DEF)) and control (healing abutment (HEA)) groups. (SECONDARY) Assess the changes in bone level (6 and 12 months after implant placement) between the 1 mm high abutment group and 2 mm abutment group. Evaluate changes in implant stability recorded with analysis of the resonance frequency (RFA) Osstell system, at 6 and 12 months after implant placement, between the control group (HEA) and test (DEF). For the DEF group, the abutment was placed at the time of the surgery and was never removed. For the HEA group, the abutment was removed three times during the manufacture of the crowns. The abutments used were 1 mm high (Subgroup A) and 2 mm high (Subgroup B). Materials and methods: A total of 147 patients were selected between 54.82 ± 11.92 years old. After implant placement, patients were randomly distributed in the DEF and HEA group. After the implant placement, a periapical radiograph was taken to assess the peri-implant bone level; the same procedure was carried out 6 and 12 months post-placement. To compare the qualitative variables between the groups (HEA/DEF), the Chi-square test was used; for quantitative (MANOVA). Results: After a year, the accumulated bone loss was 0.48 ± 0.71 mm for the HEA group and 0.36 ± 0.79 mm for the DEF group, without statistical significance. Differences were only found due to timing (time) between 0 and 6 months (=0.001) and 0 and 12 months (0.001), with no differences attributable to the study groups (DEF and HEA). The accumulated bone loss (1 year) was 0.45 ± 0.78 mm for the 1 mm abutment group and 0.41 ± 0.70 mm for the 2 mm abutment group (p = 0.02). No differences were observed in implant stability between groups. Conclusions: The “One Abutment—One Time” concept does not reduce peri-implant bone loss compared to the connection–disconnection technique. The height of the abutment does influence bone loss: the higher the abutment, the lower the bone loss. View Full-Text
Keywords: connection and disconnection abutment; implant-abutment connections; implant bone loss; dental implants; implant collar; implant neck; marginal bone level connection and disconnection abutment; implant-abutment connections; implant bone loss; dental implants; implant collar; implant neck; marginal bone level
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MDPI and ACS Style

Ríos-Santos, J.V.; Tello-González, G.; Lázaro-Calvo, P.; Gil Mur, F.J.; Ríos-Carrasco, B.; Fernández-Palacín, A.; Herrero-Climent, M. One Abutment One Time: A Multicenter, Prospective, Controlled, Randomized Study. Int. J. Environ. Res. Public Health 2020, 17, 9453. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph17249453

AMA Style

Ríos-Santos JV, Tello-González G, Lázaro-Calvo P, Gil Mur FJ, Ríos-Carrasco B, Fernández-Palacín A, Herrero-Climent M. One Abutment One Time: A Multicenter, Prospective, Controlled, Randomized Study. International Journal of Environmental Research and Public Health. 2020; 17(24):9453. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph17249453

Chicago/Turabian Style

Ríos-Santos, José V., Gregorio Tello-González, Pedro Lázaro-Calvo, Francisco J. Gil Mur, Blanca Ríos-Carrasco, Ana Fernández-Palacín, and Mariano Herrero-Climent. 2020. "One Abutment One Time: A Multicenter, Prospective, Controlled, Randomized Study" International Journal of Environmental Research and Public Health 17, no. 24: 9453. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph17249453

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