Accuracy of Conventional and Digital Impression Techniques Used for Maxillary Hybrid Prosthesis

NCT ID: NCT05321589

Last Updated: 2022-04-11

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 12 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2021-03-01
• Study Completion Date: 2022-03-20

Brief Summary

evaluation and comparison of the accuracy of conventional and digital impression for full arch screw retained prosthesis for edentulous maxilla.

Detailed Description

Each patient received 6 implants in the maxillary ridge (widely distributed across the arch) in the following positions: central incisors, canines/first premolar teeth and first molar teeth aided by surgical stent. then each patient received 2 types of impression techniques Technique 1 :conventional impression conventional open tray impression technique with splinted transfers using vinylpolysiloxane and Technique2 : Digital impression taken using original scan bodies torqued to the implants .three dimensional accuracy of impression techniques was evaluated using linear measurements and 3D deviation between the two techniques was measured.

Conditions

Prosthesis Durability

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: OTHER
• Blinding Strategy: NONE

Study Groups

technique 1: conventional splinted open tray impression

a conventional open tray impression technique splinted with ligature wire and duralay resin was done with polyvinyl siloxane impression .

analogues were screwed to the impression copings and casts were poured.

Group Type: OTHER

impression techniques for implant used for maxillary screw retained hybrid prosthesis

Intervention Type: OTHER

conventional splinted open tray impression technique was done for maxillary implants to fabricate screw retained hybrid prosthesis and digital intra oral impression was done for the same patients after screwing scan bodies to the implants intra orally.

evaluation of accuracy and 3D deviation between the two techniques was done

technique 2: digital intraoral impression technique

scan bodies were screwed to implants intraorally and digital scanner was used to record digital impression, scanning protocol started from occlusal ,buccal to palatal surfaces.

The resulting scans were then exported in the standard tessellation format (.STL)

Group Type: OTHER

impression techniques for implant used for maxillary screw retained hybrid prosthesis

Intervention Type: OTHER

conventional splinted open tray impression technique was done for maxillary implants to fabricate screw retained hybrid prosthesis and digital intra oral impression was done for the same patients after screwing scan bodies to the implants intra orally.

evaluation of accuracy and 3D deviation between the two techniques was done

Interventions

impression techniques for implant used for maxillary screw retained hybrid prosthesis

conventional splinted open tray impression technique was done for maxillary implants to fabricate screw retained hybrid prosthesis and digital intra oral impression was done for the same patients after screwing scan bodies to the implants intra orally.

evaluation of accuracy and 3D deviation between the two techniques was done

Intervention Type: OTHER

Other Intervention Names

digital and conventional impression techniques

Eligibility Criteria

Inclusion Criteria

1. Completely edentulous maxillary and mandibular ridges

2. Healthy ridge covered by normal oral mucosa and free from any ridge flabbiness.

3. All of the patients were dissatisfied with the retention and stability of their maxillary conventional dentures and expressed a strong desire for a more stable prosthesis.

4. Sufficient bone quantity and quality in the front and posterior maxillary regions, as determined by preoperative CBCT, to accommodate six implants with a diameter of at least 3.5 mm and a length of at least 10 mm.

5. Enough restorative space (from the mucosa covering the crest of the maxillary residual ridge to the occlusal plane) to allow the fixed prosthesis to be constructed ,preliminary jaw relationship revealed this.

6. It's been at least a year since the last extraction.

Exclusion Criteria

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1. Systemic diseases that may alter tissue response to implantation and affects osseointegration (radiation, diabetes, osteoporosis, bleeding disorders or hepatic patients)

2. Long term immunosuppressive and corticosteroid drug therapy.

3. Patient with abnormal habits as clenching and bruxism.

4. Smoking patients.

5. Patients with problems in TMJ.

6. Neuromuscular diseases.

• Minimum Eligible Age: 50 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Mansoura University

OTHER

Sponsor Role: lead

Responsible Party

Gilan Altonbary

associate professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

faculty of Dentistry , Mansoura University

Al Mansurah, DK, Egypt

Countries

Egypt

Other Identifiers

A25100221

Identifier Type: -

Identifier Source: org_study_id