Soft Tissue Responses Around Nanostructured Calcium-phosphate-coated Implant Abutments on Dental Implants: Histological, Genetic and Clinical Evaluation in Smokers and Non-smokers.

Not Applicable

Completed

• Conditions: Missing Several Teeth; Minimum of 2 Dental Implants Needed
• Interventions: Procedure: normal healing abutment; Procedure: nano-structured healing abutment

• Registration Number: NCT01620918
• Lead Sponsor: University Ghent

Brief Summary

* Baseline:

* Standard preparation of the osteotomy

* Placement of 2 dental implants

* On each implant one of both types of healing abutments is placed

* Suturing

* Standardized radiography to measure bone-levels at baseline

* Digital impression of the surrounding gingiva with an intra-oral scanner (a non-invasive method) to measure the baseline level of the gingiva

* 2 weeks after Baseline:

o Removal of the sutures

* 4 weeks after Baseline:

* A 2nd digital impression of the soft tissue with an intra-oral scanner

* Collecting crevicular fluid by placing paperpoints in the provided apertures in the healing abutments for 60 seconds without bleeding.

* Measuring of the pocket depth in the provided apertures in the healing abutments with an automated probe.

* Removal of the Healing Abutment with the attached soft tissue en-bloque.

* Placement of a new, regular, Encode Healing Abutment.

* 10 weeks after Baseline:

* Start of standard prosthetic procedure. In this study we expect that the soft tissue attachment (i.e. the gingival attachment) will be stronger and earlier achieved at the nano-structured healing abutments than at the normal, uncoated healing abutments. This would lead to a more stable soft tissue complex on the long rung and thus providing a more predictable aesthetic outcome. Secondly, a stronger attachment would mean a stronger barrier against micro-organisms and might influence the occurrence of peri-implantitis.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2012-06-13
• Study First Submitted QC: 2012-06-13
• Study First Posted: 2012-06-15
• Study Start: 2012-08
• Primary Completion: 2015-01
• Study Completion: 2015-08
• Status Verified: 2021-11
• Last Update Submitted: 2021-11-18
• Last Update Posted: 2021-12-01

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

• Patients are eligible for this study if they are in need of minimum 2 dental implants and have sufficient bone to place these implants

Exclusion Criteria

• All patients with limited bone
• Periodontally compromised patients
• Patients who took antibiotics 3 months before implantation
• Patients with uncontrolled diabetes
• Pregnant patients
• Patients who received radiotherapy in the head/neck region
• Patients under chemotherapy
• Patients who had intravenous use of bisphosphonates

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
2 types of healing abutment	nano-structured healing abutment	Patients who are in need of minimal 2 dental implants, who will receive both types of healing abutments.
2 types of healing abutment	normal healing abutment	Patients who are in need of minimal 2 dental implants, who will receive both types of healing abutments.

Primary Outcome Measures

Name	Time	Method
The soft-tissue attachment around 2 different surfaces at 4 weeks post-implantation.	at 4 weeks post-implantation	Genetic evaluation (through Polymerase Chain Reaction, PCR, the tissue will be detected for certain growth factors), histomorphometric analysis to measure the actual percentage of the surface on which the gingiva is attached to, clinical evaluation of the strength of the attachment through means of an automated probe.

Trial Locations

Locations (1)

Ghent University; 🇧🇪 Ghent, Belgium