Periimplant Bone Changes in Different Abutment Heights and Insertion Timing in Posterior Mandibular Areas: Results From a Randomized Prospective Clinical Trial
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Dental Implant Failed
- Sponsor
- Universidade Católica Portuguesa
- Locations
- 1
- Primary Endpoint
- Marginal bone changes
- Status
- Completed
- Last Updated
- 6 years ago
Overview
Brief 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).
Investigators
Tiago Borges
Professor
Universidade Católica Portuguesa
Eligibility Criteria
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.
Outcomes
Primary Outcomes
Marginal bone changes
Time Frame: 60 months
Crestal bone changes that occur around the dental implant