Effect of Geometric Modifications of Implant Scan Bodies

Mansoura University

Status: Completed

Conditions: Prosthesis Durability

Treatments: Device: Implant supported hybrid prosthesis

Study type: Interventional

Funder types: Other

Identifiers

NCT06040385

M0203023RP

Details and patient eligibility

About

The aim of this clinical study will be the effect of geometric modifications of implant scan bodies compared to conventional transfer techniques on passivity of all on four mandibular restorations

Full description

The aim of this study will be the effect of geometric modifications of implant scan bodies compared to conventional transfer techniques on passivity of all on four mandibular restorations.

Evaluation method:

The trueness of the final impression and the passivity of the final prosthesis will be evaluated by two methods:

Invitro evaluation For each patient in every group, the standard tessellation language (STL) files of scanned impressions will be superimposed on the reference file to determine the 3D surface, linear, and angular position analysis.

The STL files for both frameworks will be superimposed on the reference file to determine the passivity.

In vivo (Clinical) evaluation Radiographic evaluation using long cone parallel technique will be done for the framework after 6 month (T6) after one year (T12), and after 18 month (T18) from insertion.

Enrollment: 18 patients

Sex: All

Ages: 45 to 70 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• 1. All selected patients will have four implants placed in the mandibular interforaminal region according to all -on -four concept.

  2. All selected patients have a healthy mucosa and with no clinical complications.

  3. All patients are cooperative and approve the proposed treatment protocol.

Exclusion criteria

• 1. Patients who reject to participate in the study. 2. Patients who need implant placement as a result of previous implant failure.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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18 participants in 2 patient groups

• Group I (control group)

Active Comparator group

Description:

Final impression will be done by conventional one-step impression technique. For the same patient, another final impression using unmodified scan bodies will be done by direct intraoral scan technique.

Treatment:

Device: Implant supported hybrid prosthesis

• Group II (Test Group)

Active Comparator group

Description:

Final impression will be done by conventional one-step impression technique. For the same patient another final impression using subtractive modified scan bodies will be done by direct intraoral scan technique

Treatment:

Device: Implant supported hybrid prosthesis