Fabrication of a Definitive Cad/Cam Titanium Abutment Prior to Guided Surgery: a Pilot Study.

University of North Carolina, Chapel Hill22 enrolled

Overview

The study will involve placing a dental implant through a guided surgery protocol developed using 3D CT technology. Because the implant position is planned digitally using the CT data from the patient, this allows investigation of an abutment that supports the implant crown and soft tissues to be fabricated prior to implant placement. In doing so, this makes the protocol for patient care simpler and faster. In fabricating the the abutment prior to surgery, the investigators will design the abutments at different heights below the gumline to see an optimal margin height for fabrication of the abutment prior to surgery. The study hypothesis is that more often the abutment margin placed just slightly below (.5mm) the gumline will be visible about half of the time while the abutment margin placed further under the gumline (1.5mm) will be visible only about 10% of the time. The optimal outcome is that at delivery and follow-up, the abutment margin will not show intraorally.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Single Edentulous Space

Interventions

Eligibility

Sex: ALLMin age: 18 YearsMax age: 99 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * partially edentulous with single edentulous space * edentulous site where previous tooth has been extracted for at least two months * minimum of 20 teeth present * able to tolerate dental implant surgical and restorative procedures * consent to participate in clinical trial Exclusion Criteria: * asa class 3+ * present drug use * is pregnant or plans to become pregnant * patients in need of lateral window sinus graft * patients in need of grafting prior to implant placement * patients in need of extensive grafting at time of implant placement * tooth is present or extracted within the last 2 months * history of IV bisphosphonate use or oral bisphosphonate use contraindicating dental implant therapy * untreated caries or periodontal disease * severe bruxism * smoker within past 6 months * unlikely to be able to comply with study procedures according to investigators * known allergy to any materials used in dental implant surgery

Outcomes

Primary Outcomes

Number of Participants With Abutment Margin Exposure > 0

Margin exposure of the abutment between groups at 6 months post surgery.

Time frame: up to 6 months post surgery

Secondary Outcomes

Number of Participants With a Soft Tissue Response of Bleeding

To assess the condition of the peri-implant mucosa, those with a soft tissue response of bleeding upon probing were counted. Fisher's exact test will be used after the site has been evaluated for presence of bleeding or not.

Time frame: 6 months post surgery

Number of Participants With Provisional Crown Fit at Delivery

To assess if the Provisional Crown was able to be cemented at time of abutment connection was reported as 'Yes' or 'No.'

Time frame: 8 weeks post surgery