All-on-Four Implants With Ultrasonic

NCT ID: NCT03357692

Last Updated: 2020-09-17

Basic Information

• Recruitment Status: WITHDRAWN
• Clinical Phase: NA
• Study Classification: INTERVENTIONAL
• Study Start Date: 2017-10-31
• Study Completion Date: 2020-02-15

Brief Summary

The objective of this observational study is the radiographic evaluation of marginal bone remodeling after surgical implant insertion in an immediate loading all-on-four technique with trans-sinusal titanium implants, correlating the gingival thickness and the height of the implant prosthetic stump with the proportion of the abovementioned marginal bone remodeling.

Detailed Description

The extent of marginal bone remodeling around the neck of dental implants has been used for many years as a criterion for defining its long-term success.

In fact, the etiology of this Marginal Bone Loss has not yet been well understood, although many theories have been proposed to explain it.

The influence of the thickness of the mucous membrane on marginal bone loss was discussed elsewhere which suggests a protective action for the underlying soft tissue that recreates a kind of "biological amplitude" around the implant. Some studies have suggested that a marginally oscillating bone loss between 1.5 and 2.0 mm provides the vertical space for proper restoration of the biological amplitude. Some authors. published a study that demonstrated that, in crestal systems with switching platforms, a vertical thickness of soft tissue greater than 2 mm is effective in preventing periimplant crestal bone loss. However, the severity of the sample examined precludes the possibility of making definitive conclusions.

Recently other authors have shown significant marginal bone loss around implants with lower prosthetic implants than those with higher prosthetic prostheses, without however measuring the thickness of soft tissues and evaluating their influence. In particular, the extent of bone loss was extremely limited when the height of the stump was equal to or greater than 2 mm. From a theoretical point of view, a prosthetic abutment of at least 2 mm high, calculated from the apical margin of the crown to the platform of the implant, should provide adequate space for restoring the biological amplitude.

It can therefore be hypothesized that these two factors (the vertical thickness of soft tissues and the height of the prosthetic stump) are the expression of the same principle: the restoration of the biological amplitude around the implant's neck. From a clinical point of view it will be useful to determine which of the two factors is most important in preventing and limiting periimplant bone loss.

Conditions

Bone Atrophy, Alveolar

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

maxillary total edentulism

all on four implant rehabilitation with trans-sinusal implants

Group Type: EXPERIMENTAL

all on four implant rehabilitation

Intervention Type: PROCEDURE

implant insertion after piezoelectric site preparation for trans-sinusal implants

Interventions

all on four implant rehabilitation

implant insertion after piezoelectric site preparation for trans-sinusal implants

Intervention Type: PROCEDURE

Eligibility Criteria

Inclusion Criteria

1. indications for implant insertion into the maxillary upper jaw, based on a careful diagnosis and treatment plan;

2. presence of a residual bone crest with a minimum surgical height of 4 mm at the maxillary sinus (bilaterally), and a thickness of at least 6 mm at the two distally programmed implant sites;

3. presence of a residual bone crest with a minimum surgical height of 10 mm at the anterior maxilla, and a thickness of at least 6 mm at the mesially programmed implant sites;

4. the bone crest should be healed (at least 6 months after the loss / extraction of the corresponding dental element);

5. no regenerated bone;

6. Plaque index below 25% and bleeding index less than 20%;

7. the buccal length of the adherent gingiva ≥ 4 mm;

8. age of the patient> 18 years;

9. systemic condition of the compensated patient (American Society of Anesthesiologist score < 2);

8) Patients should be able to examine and understand the protocol of study; 9) subscribing to informed consent.

Exclusion Criteria

1. not treated diabetes

2. cardiovascular disease

3. incapability of maintaining a good oral hygiene

• Minimum Eligible Age: 19 Months
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

International Piezosurgery Academy

OTHER

Sponsor Role: lead

Responsible Party

Mr. Claudio Stacchi, DDS, MSc

President of the International Piezosurgery Academy

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Claudio Stacchi, Dr

Role: STUDY_DIRECTOR

International Piezosurgery Academy

Locations

Piezosurgery Academy

Parma, , Italy

Countries

Italy

References

Malo P, Rangert B, Nobre M. "All-on-Four" immediate-function concept with Branemark System implants for completely edentulous mandibles: a retrospective clinical study. Clin Implant Dent Relat Res. 2003;5 Suppl 1:2-9. doi: 10.1111/j.1708-8208.2003.tb00010.x.

Reference Type: BACKGROUND

PMID: 12691645 (View on PubMed)

Agliardi EL, Tete S, Romeo D, Malchiodi L, Gherlone E. Immediate function of partial fixed rehabilitation with axial and tilted implants having intrasinus insertion. J Craniofac Surg. 2014 May;25(3):851-5. doi: 10.1097/SCS.0000000000000959.

Reference Type: BACKGROUND

PMID: 24820712 (View on PubMed)

Other Identifiers

Nobelsinus

Identifier Type: -

Identifier Source: org_study_id