NCT04340726

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

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

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: —
• Sponsor: Universidade Católica Portuguesa · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

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).

Conditions

• Dental Implant Failed

Interventions

Type	Name	Description
PROCEDURE	One time abutment

Timeline

• Start date: 2015-01-01
• Primary completion: 2015-12-01
• Completion: 2015-12-31
• First posted: 2020-04-09
• Last updated: 2020-04-09

Locations

1 site across 1 country: Portugal