Evaluation of Crestal Bone Loss Around Short Dental Implants As Affected By Two Suprastructure Materials

Study Overview
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Brief Summary
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The aim of the study is to evaluate the crestal bone loss developed around short dental implants after using screw retained Hybrid ceramic crowns when compare to screw retained Lithium Di silicate based ceramic crowns.

Detailed Description
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This study will be conducted on patients requiring single implant replacement in the posterior regions of the mandible, admitted to the Outpatient Clinic of Fixed Prosthodontics Department, Faculty of Oral and Dental medicine, Cairo University. Examination and diagnosis: Selection and examination of the patients according to inclusion and exclusion criteria. Preoperative Cone Beam Computed Tomography (CBCT) to all patients. Primary impression will be taken to produce study cast. Taking a professional photo for the examined posterior area. Patients will be divided into two group: G1: Short implants will be restored by screw retained Hybrid ceramic crowns G2: Short implants will be restored by screw retained Lithium Di silicate based ceramic crowns Surgical procedures: Implants will be placed following standardized protocol. After 4 months the patients re-attended for placement of healing abutments for about (10-14) days and prosthesis fabrication. Data collection and post operative radio-logical assessment: -Taking standardized digital peri-apical radio-graph by paralleling technique and film holding device for follow up at 12 months after crowns loading to evaluate crestal bone loss.

Official Title
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Evaluation of Crestal Bone Loss Around Short Dental Implants As Affected By Two Suprastructure Materials

Conditions
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Bone Loss

Intervention / Treatment
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* Other: Vita Enamic (Hybrid dental ceramic)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients within age group of ≥ 18. There should be absence of any systemic diseases. Patients have missing simple posterior tooth Adequate interarch space. Inadequate residual bone height to place standard length implant. Patients with good oral hygiene. Exclusion Criteria: A history that would complicate the outcome of the study, such as alcohol or drug dependency, smoking, poor health, or any other medical, physical or psychological reason that might affect the surgical procedure or the subsequent prosthodontics treatment and required follow-up. Heavy smokers. Poorly controlled diabetes mellitus. Patients on radiotherapy. Patients with temporomandibular disorders

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Hybrid superstructure<br>screw retained hybrid ceramic crowns | Other: Vita Enamic (Hybrid dental ceramic)<br>* Vita Enamic (Hybrid dental ceramic) is provided as blocks to be milled using Computer aided design/Computer aided manufacturer (CAD/CAM) technology.<br>* Other names: Polymer Infiltrated Ceramic Network (PICN);|
| Active Comparator: Ceramic superstructure<br>screw retained lithium disilicate based ceramic crowns | Other: Vita Enamic (Hybrid dental ceramic)<br>* Vita Enamic (Hybrid dental ceramic) is provided as blocks to be milled using Computer aided design/Computer aided manufacturer (CAD/CAM) technology.<br>* Other names: Polymer Infiltrated Ceramic Network (PICN);|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Crestal Bone Loss Crestal bone loss will be measured using standardized digital periapical radiograph by paralleling technique and film holding device -measuring unit:Milimeters | preventive | one year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| screw loosening of crowns screw loosening will be observed by clinical investigation -measuring unit:Binary (Yes/No) | preventive | one year |