Laser microgrooved vs. machined healing abutment disconnection/reconnection: a comparative clinical, radiographical and biochemical study with split-mouth design

International Journal of Implant Dentistry

Dario Di Nardo¹  Gabriele Miccoli¹  Rodolfo Reda¹  Luca Testarelli¹  Alessandro Mazzoni¹  Renzo Guarnieri² 

[1] Department of Oral and Maxillo-Facial Sciences, La Sapienza University of Rome, Rome, Italy;Department of Oral and Maxillo-Facial Sciences, La Sapienza University of Rome, Rome, Italy;Private Perio-Implant Practice, Strada di Canizzano 33, 31100, Treviso, Italy;

关键词: Peri-implant crevicular fluid;    Inflammation;    Abutments;    Cytokines;   

DOI  :  10.1186/s40729-021-00301-6

来源: Springer

【 摘 要 】

BackgroundRepeated removal and replacement of healing abutments result in frequent injuries to the soft tissues.PurposeThe purpose of this study was to evaluate the effect of disconnection/reconnection of laser microgrooved vs. machined healing and prosthetic abutments on clinical periodontal parameters, marginal bone levels, and proinflammatory cytokine levels around dental implants.Material and methodsTwenty-four patients each received 2 implants with one-stage protocol in a split-mouth design on the same jaw. In each patient, one healing and prosthetic abutments with a laser microgrooved surface (LMS group) and one healing and prosthetic abutments with machined surface (MS group) were used. Four months following implant placement (T0), the healing abutments were disconnnected and reconnected three times to carry out the impression procedures and metal framework try-in. Four weeks later (T1), definitive prosthetic abutments were installated with screw-retained crowns. Modified plaque index (mPI), modified gingival index (mGI) bleeding on probing (BOP), and probing depth (PD) were recorded at T0 and T1. At the same time points, samples for immunological analyses were taken from the sulcus around each implant. Peri-implant crevicular fluid (PICF) samples were analyzed for interleukin-1beta (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor (TNF)-α levels using the ELISA kit.ResultsAt T0 and T1, mPI and mGI showed no statistical difference between the two groups, while higher PD and BoP values were noted for the MS group (P < 0.05). The mean PICF volume and mean concentrations of IL-1β, IL-6, and (TNF)-α in the LMS group were statistically less than those in the MS group (P < 0.05). In addition, comparison of IL-6 and IL-1β mean concentrations at T0 and T1 in the MS group showed a statistically significant increase (p < 0.05) over time, which was not noted for the LMS.ConclusionDisconnection/reconnection of healing and prosthetic abutments with a laser-microgrooved surface resulted in less inflammatory molecular response compared with conventional machined ones.Trial registrationClinicalTrials.govNCT04415801, registered 03/06/2020

【 授权许可】

CC BY