Evaluation of Marginal Bone Loss (MBL) 12 Months Post-loading of Implants Supporting Individual Crowns, Based on the Height of the Intermediate Abutment and Its Placement Time. Immediate Abutments of 2 or 3 Mm Show the Lowest MBL, Whereas 1.5 Mm or Delayed Abutments Are Associated with Higher MBL.

Summary

Objectives:To determine which combination of abutment height and timing of placement is most effective in reducing marginal bone loss (MBL).

Materials and Methods: 54 patients received at least one single screw-retained crown on an implant replacing a posterior tooth (60 implants). The implants were divided into six treatment groups based on the height (1.5 mm; 2 mm; 3 mm) and timing of placement (immediate: surgery 1; delayed: surgery 2) of the intermediate abutment: group 1 (height 3; surgery1), group 2 (height 2; surgery1), group 3 (height 1.5; surgery1), group 4 (height 3; surgery2), group 5 (height 2; surgery2), group 6 (height 1.5; surgery2). Mesial and distal linear radiographic measurements (from the implant shoulder to the bone crest) were performed at five follow-up times: implant surgery, crown placement (T1), and at 3 (T2), 6 (T3), and 12 months after loading (T4). Partial and total MBL were compared among the treatment groups.

Conditions

• Marginal Bone Loss

Interventions

PROCEDURE

Implant

Placement of an immediate intermediate abutment (in implant placement surgery). This abutment has a height of 3 mm.

PROCEDURE

Implant

Placement of an immediate intermediate abutment (in implant placement surgery). This abutment has a height of 2 mm.

PROCEDURE

Implant

Placement of an immediate intermediate abutment (in implant placement surgery). This abutment has a height of 1.5 mm.

PROCEDURE

Implant

Placement of a delayed intermediate abutment (in the second implant surgery). This abutment has a height of 3 mm.

PROCEDURE

Implant

Placement of a delayed intermediate abutment (in the second implant surgery). This abutment has a height of 2 mm.

PROCEDURE

Implant

Placement of a delayed intermediate abutment (in the second implant surgery). This abutment has a height of 1.5 mm.

Sponsors & Collaborators

• University of Salamanca

  collaborator OTHER

• Quintas Hijós Clínica Dental

  lead OTHER

Principal Investigators

• Esteban Pérez Pevida, Dentistry · University of Salamanca

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

21 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2022-06-15

Primary Completion

2024-05-01

Completion

2024-06-28

Countries

• Spain

Study Locations