Digital vs Analog Impression in Cases of All-on-4 - Prosthesis

October University for Modern Sciences and Arts56 enrolled

Overview

Fifty six patients were randomly enrolled in the study. Participants were randomly stratified into two control groups and two test groups, from which conventional pick up and digital impressions were made respectively. Patients of group 1 (CIG Axial) and 3 (DIG Axial) received 4 axial implants whereas, group 2 patients (CIG Tilted), and group 4 (DIG Tilted) received two anterior axial implants and two distal tilted implants. All participants received hybrid dentures. Bone loss, implant loss, maintenance of prosthesis were evaluated at 6m,12m, and 24 months follow up period.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Edentulous Mouth

Interventions

DIG AxialOTHER

patients received 4 axial implants and digital impression

DIG TiltedOTHER

received two anterior axial implants and two distal tilted implants, and digital impression

CIG AxialOTHER

patients received 4 axial implants and conventional impression

Eligibility

Sex: ALLMin age: 50 YearsMax age: 65 Years

Medical Language ↔ Plain English

Inclusion Criteria: * completely edentulous patients with age range from 50-65 years. * physically and psychologically eligible participants for implants placement. * adequate bone to receive 4 interforaminal implants. Exclusion Criteria: participants were excluded if * medical conditions that precludes implants placement * smokers * patients suffering from any parafunctional habits

Locations (1)

OctoberUMSA

Giza, Egypt

Outcomes

Primary Outcomes

implant loss

The implants were considered surviving if they were clinically stable and functioning without any mobility. Failure was defined removal of implants due to loss of integration, pain, implant mobility, paraesthesia, neuropathies or psychological reasons. Calculation of the estimated failure rate was performed by dividing the number of implant failures by the total exposure time of the implant. The total exposure time is the interval of time the implants could be followed for the entire observation time or up to failure of the implants that were lost during the follow-up period.

Time frame: 24 months

Secondary Outcomes

crestal bone loss

Standardized periapical radiographs with long cone paralleling technique using film holders were used for the assessment of crestal bone loss. The loss of marginal bone relative to the implant shoulder at the mesial and distal of each implant was measured in mm and then the mean was calculated and statistically estimated. A digital intraoral imaging system was used (Digora phosphor plate reader, Soredex Tuusula, Finland). All the radiographs were scanned and then uploaded into the computer for assessing bone loss over time. The "ImageJ" software was used to take the measurements on the computer screen. Postoperative radiographs with the implants placed at the crest of the bone were compared with the 6,12 and 24 m radiographs.

Time frame: 24 months

Data from ClinicalTrials.gov

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