Lithium Disilicate Glass-ceramic Versus Hybrid Ceramic Superstructure Materials on Implant Stability

N/ACompletedNCT02931903

Cairo University20 enrolled

Overview

The aim of this study is to assess the effect of the newly introduced (hybrid dental ceramic) superstructure materials, Vita Enamic versus IPS Emax on implant stability, patient satisfaction and crestal bone loss.

This study will be conducted on patients requiring single implant replacement in the maxillary premolar area, admitted to the Outpatient Clinic of Fixed Prosthodontics Department, Faculty of Oral and Dental medicine, Cairo University. After a period of healing of 6 months, an implant abutment of accurate diameter and angulation will be placed to fit precisely into the internal hex of the fixture after removal of the cover screw. The platform matched abutment will be then secured into its final position using the abutment screw. Alginate impression will be taken and poured into dental stone. Using the impression transfers, impressions with polyvinylsiloxane are taken. After taking the impressions, the Impression transfers are removed and fixed to the implant replica. Surgeons' assistants will be asked to open the sealed envelope containing the information regarding the crown placement. The impressions will be sent to dental laboratory with the result of the sealed envelope, for preparation of the future crowns, either vita enamic crowns or Ips e max crowns.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Enrollment

Conditions

Prosthesis Survival

Interventions

Vita Enamic (hybrid dental ceramic)OTHER

Vita Enamic (hybrid dental ceramic) are provided as blocks to be milled using Computer aided design/Computer aided manufacturer (CAD/CAM) technology,

lithium disilicate glass-ceramicOTHER

All ceramic crowns (Lithium disilicate glass ceramic) milled by Computer aided design/Computer aided manufacturer (CAD/CAM) technology

Eligibility

Sex: ALLMin age: 18 YearsMax age: 50 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: Patients \> 18 yrs. Patients with missing teeth in the maxillary premolar region. Absence of any pathological condition in the recipient site. Stabilization phase will be performed including: * Scaling * Debridement. * Elimination of all carious cavities and root canal treatment if needed. * Elimination of over-hanging restoration. Systemic condition of the subjects was evaluated according to dental modification of the Cornell medical index (Kerr and Millard 1966). Patients who are cooperative, motivated, and hygiene conscious. Patients should have adequate ridge width (\>5mm). Exclusion Criteria: Patients unable to undergo minor surgical procedure. Patients with history of drug abuse or metabolic drugs. Patients with history of psychiatric disorder. Patients with insufficient bone. Patients with insufficient vertical inter-arch space, upon centric occlusion, to accommodate the available restorative components. Patients with any systemic condition that may contraindicate implant therapy. Patients that may have any habits that may jeopardize the osseo-integration process, such as heavy smoking and alcoholism. Patients with para-functional habits that produce overload on the implant such as bruxism and clenching.

Outcomes

Primary Outcomes

Implant survival rate

Implant stability and success could be affected by crestal bone loss, if the implant is stable therefore high survival rate

Time frame: 12 months

Secondary Outcomes

Crestal bone loss

Crestal bone loss will be measured using a Cone Beam Computed tomography to measure the amount of bone resorbed from start date, and follow up for one year

Time frame: 12 months

Peri-implant tissue response

Bleeding index, probing depth and gingival index

Time frame: 12 months

Patient satisfaction

Patients will be asked to answer a questionnaire to know whether the procedure was not satisfied, accepted, or highly satisfied

Time frame: 12 months

Data from ClinicalTrials.gov

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