Soft Tissue Changes Around Dental Implants (Geistlich)
Tooth Loss, Dental Diseases, Wound Heal
About this trial
This is an interventional treatment trial for Tooth Loss focused on measuring soft tissue regeneration, soft tissue graft, dental implant, imaging
Eligibility Criteria
Inclusion Criteria:
- Age between 20 and 80 years.
- Good medical and psychological health.
- Absence of untreated caries lesions and untreated/uncontrolled periodontal disease. If patients require periodontal treatment (non-surgical and/or surgical), this has to be arranged outside the study protocol and completed at least 30 days prior to the enrolment.
- Need of a single-tooth replacement in the aesthetic (incisor, canine or premolar) region.
- Presence of adequate bone for implant placement without need for significant bone regeneration. In particular, the patients should have a bucco-palatal residual alveolar width of at least 6 mm at the central and crestal aspect of the single tooth gap to ensure complete embedding of an implant by bone (De Bruyckere et al., 2018).
- A residual alveolar height >8 mm, enough inter-arch space for a crown and a minimum distance of 6 mm from the adjacent teeth.
- The width and height will be confirmed after x-ray examination in Visit 1 (or extra visit). Cases of small apical fenestration (≤ 25% of implant length) after implant placement will not be excluded, but will be treated according to the GBR principle (collagen membrane associated with a deproteinized bovine bone graft) to re-establish the bone contour and without over contouring.
- At least 8 weeks of post-extraction socket healing had occurred in the edentulous site.
- Willingness to sign the informed consent form.
Exclusion Criteria:
- Self-reported pregnancy and lactation.
- Any known systemic disease affecting bone metabolism (e.g. Cushing's syndrome, crohn's disease, rheumatoid arthritis, osteoporosis, diabetes type I and uncontrolled diabetes type II), systemic infections or recent surgical procedures within 30 days of study initiation.
- Chronic treatment (i.e., 2 weeks or more) with any medication known to affect oral status (e.g., phenytoin, dihydropyridine, calcium antagonists and cyclosporine) or bone metabolism (e.g. bisphosphonates, hormone replacement therapy, immunosuppressants) within 1 month before baseline visit.
- HIV or viral hepatitis.
- Physical handicaps that would interfere with the ability to perform adequate oral hygiene.
- Self-reported alcoholism or chronic drug abuse.
- Heavy smokers (>10/cigarettes per day).
- Patients suffering from a known psychological disorder or with limited mental capacity or language skills such that study information could not be understood, informed consent could be obtained or simple instructions could be followed.
- Full-mouth bleeding (BOP) and plaque (PI) scores >30% or sites with periodontal pocket depth >5 mm at the completion of the pre-treatment phase.
- Very thin or very thick biotypes that according to the clinician's judgement would either risk to have complications or would not benefit from receiving a graft.
- <2 mm KT buccally (from the mucogingival junction to the coronal aspect of the crestal soft tissue).
Sites / Locations
- Barts and The London Dental HospitalRecruiting
- Centre for Oral Clinical Research (COCR)Recruiting
Arms of the Study
Arm 1
Arm 2
Arm 3
Placebo Comparator
Experimental
Active Comparator
No Soft tissue augmentation surgery
Soft tissue augmentation surgery with Fibro-Gide
Soft tissue augmentation surgery with patient's CTG
No soft tissue augmentation concomitant to implant placement. Negative control group.
Soft tissue augmentation concomitant to implant placement with a porcine, volume-stable cross-linked collagen matrix (Fibro-Gide, Geistlich Pharma AG, Wolhusen, Switzerland). Test group.
Soft tissue augmentation concomitant to implant placement with a connective tissue graft (CTG) taken from the patient's palate or retromolar area. Positive control group.