Skip to main content
OpenTrials
Completed

NCT Number: NCT04340726

Periimplant Bone Changes in Different Abutment Heights and Insertion Timing in Posterior Mandibular Areas

The aim of this study was to compare the influence of the abutment height and insertion timing on early marginal bone loss (MBL) in posterior mandibular partial implant-supported restorations.

Material and methods: The study was planned as a prospective, randomized, controlled parallel group including subjects in need of two implants for the restoration of an edentulous posterior mandibular area. Data were gathered on age, gender, attached gingiva height, bleeding on probing (BoP), smoking habits and previous periodontitis. The patients were allocated into three groups: Group A implants were immediately connected to 2 mm height abutments; Group B implants were immediately connected to 1 mm height abutments; Group C implants were left to heal in a sub-mucosal position and 2 mm abutments were inserted in a second stage surgery. Peri-apical radiographs were taken at the implant surgery (baseline), 4 weeks after surgery (T1), 16 weeks after implant placement at the final restoration delivery (T2) and 1-year after implant placement (T3).

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Dental Implant Failed

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Universidade Católica Portuguesa

Viseu, 3500, Portugal

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • patients age > 18 years;
  • American Society of Anaesthesiologists (ASA) status I;
  • no systemic medication or condition known to potentially alter bone metabolism; - absense of acute periodontal condition.

Exclusion criteria

  • lack of primary stability at implant surgery;
  • need for bone regeneration procedures during surgery;
  • inability to correct place the implant in accordance with the prosthetic requirements.

Treatment and study plan

One time abutment

Procedure

Primary outcomes

  1. Marginal bone changes

    Time frame: 60 months

    Crestal bone changes that occur around the dental implant

Sponsors and collaborators

Lead sponsor

Universidade Católica Portuguesa

Other

Registry information

Official study title

Periimplant Bone Changes in Different Abutment Heights and Insertion Timing in Posterior Mandibular Areas: Results From a Randomized Prospective Clinical Trial

Important dates

Study start
2015
Primary completion
2015
Study completion
2015
First posted
Apr 9, 2020
Registry last updated
Apr 9, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.