Effect of Repeated Removal and Re-placement of Abutments Around Dental Implants

University of Roma La Sapienza

Status

Unknown

Conditions

Peri-implant Mucositis

Treatments

Diagnostic Test: Repeated removal and re-placement of healing and prosthetic abutments

Study type

Interventional

Funder types

Other

Identifiers

NCT04415801

3/20

Details and patient eligibility

About

Repeated removal and re-placement of healing and prosthetic abutments result in frequent injuries to the soft tissues. The purpose was to evaluate the effect of repeated removal and re-placement of laser microgrooved and smooth/machined healing and prosthetic abutments during restorative stages, and 1 year after functional loading, on proinflammatory cytokine levels around dental implants.

Full description

Twenty-four patients each received 2 one-stage implants 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 smooth/machined surface (S/MS group) were used. Four months following implant placement [Baseline (BSL)], the healing abutments were disconnnected and reconnected three times to carry out the impression procedures and metal framework try-in. Four weeks later (T0), definitive prosthetic abutments were installated with screw retained crowns. Samples for immunological analyses were taken from the sulcus around each implant at BSL, T0, and 1 year after functional loading (T1). Peri-implant crevicular fluid samples were analyzed for interleukin-1beta (IL-1β), interleukin-6 (IL-6) and tumor necrosis factor (TNF)-α levels using the ELISA kit.

Enrollment

20 estimated patients

Sex

All

Ages

18 to 70 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

18 years or older, in good general health, and with sufficient amount of bone available to place a standard implant

Exclusion criteria

natural teeth adjacent to surgical area affected by untreated periodontal or endodontic infections, peri-implant bone defects requiring bone augmentation, absence of opposing occlusion,