Digital vs Conventional Impression in Capturing the Emergence Profile Around Maxillary Anterior Implant-supported Crowns

Semmelweis University

Status: Enrolling

Conditions: Dental Implants, Single-Tooth; Dental Impression Technique

Treatments: Procedure: direct digital impression; Procedure: indirect digital impression and 3D printed cast; Procedure: conventional impresion and cast

Study type: Interventional

Funder types: Other

Identifiers

NCT06425770

129/2023

Details and patient eligibility

About

This study compares conventional impression and cast fabrication to direct/indirect digital scannig and 3D printed casts regarding their accuracy in replicating the peri-implant emergence profile of single implants in the maxillary anterior region (FDI #15-25).

Full description

Correct design of the peri-implant emergence profile (EP) is crucial for maintaining the health of the supracrestal complex and long-term success of the implant implant-prosthodontics. After its formation with a provisional restoration, its shape needs to be transferred to the final restoration via conventional elastomeric or digital (direct/indirect) impression taking.

Our aims are to investigate around maxillary anterior single implants in patients with thick gingival phenotype:

1. the accuracy of direct digital impression vs indirect digital impression vs conventional elastomeric impression in capturing the EP and implant position
2. the accuracy of 3D printed cast with conventional gingival mask vs conventional epoxy-resin cast with gingival mask in replicating the EP and implant position
3. the amount of soft tissue collapse at 0,2,10,20 minutes following the removal of the provisional restoration in case of direct EP scanning

Enrollment: 15 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Adult above 18 yo
• No systematic deseases
• Good oral hygene (FMPS < 25%)
• Stable occlusion
• Thick phenotype
• Single missing maxilary anterior (FDI #15-25 position) tooth replaced with osseointegrated bone level impant
• Correctly formed soft tissue with CAD/CAM temporary abutment for min. 3 months
• Neighbouring teeth in place and in good condition
• Patient voluntarily accepts and signs the patient leaflets for the trial

Exclusion criteria

• Active periodontitis
• Peri-implant inflammation

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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15 participants in 3 patient groups

conventional cast

Active Comparator group

Description:

conventional impression with elastomer (silicon), from which a high-precision epoxi-resin cast with gingival mask will be created

Treatment:

Procedure: conventional impresion and cast

indirect digital impression and 3D printed cast

Experimental group

Description:

the provisional restoration will be scanned with intraoral scanner extraorally, based on which a virtual model will be created, from which a 3D printed cast will be created with manually fabricated gingival mask based on the provisional restoration

Treatment:

Procedure: indirect digital impression and 3D printed cast

direct digital impression

Experimental group

Description:

the emergence profile will be directly scanned with intraoral scanner at 0, 2, 10, and 20 minutes after removing the provisional restoration

Treatment:

Procedure: direct digital impression