Prosthetic Management of All on Four Versus All on Six to Rehabilitate Completely Edentulous Maxillary Ridge Opposed by Natural Teeth

Study Overview
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Brief Summary
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the aim of the study to compare the anterior maxillary bone index changes for patient rehabilitated with implant supported fixed prosthesis opposed by natural teeth

Official Title
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Prosthetic Management of All on Four Versus All on Six to Rehabilitate Completely Edentulous Maxillary Ridge Opposed by Natural Teeth

Conditions
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Prosthesis Survival

Intervention / Treatment
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* Procedure: implant supported maxillary fixed prosthesis


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 1. All patient wearing a maxillary implant supported overdenture or implant supported fixed restoration and mandibular natural teeth or fixed restoration within natural dentition. 2. All patients were unsatisfied by the maxillary restoration and presented clear preference for a better prosthesis. 3. They were healthy, free from any systemic diseases relating to bone resorption such as uncontrolled diabetics or osteoporosis. This was achieved through medical history and clinical examination by physician. 4. At least one year passed after the last restoration. 5. At least 15 mm restorative space must be available (from the mucosa covering the crest of the residual ridge to proposed occlusal plane) to permit construction of all types of tested prosthesis (class I according to Ahuja and Cagna).195 This was detected by a tentative jaw relation. Exclusion Criteria: 1. Patients had head and neck radiotherapy, patients with bleeding disorders or hepatic patients. 2. Patients with metabolic disorders as diabetes mellitus, osteoporosis and hepatic disorders which might affect implant lifespan. 3. Long term immunosuppress and corticosteroid drug therapy. 4. Patient with abnormal habits as clenching and bruxism. 5. Smoking patient. 6. Uncooperative patients. 7. Neuromuscular diseases. 8. Patient with problems in TMJ.

Ages Eligible for Study
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Minimum Age: 30 Years
Maximum Age: 65 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: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: The patients were classified into 2 groups: Group I; 4 patients received 4-implant supported fixed prosthesis. Group II; 4 patients received 6-implant supported fixed prosthesis.
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: all on four group<br>4 patients received 4-implant supported fixed prosthesis | Procedure: implant supported maxillary fixed prosthesis<br>* Maxillary fixed prosthesis according to all on four or all on six concept<br>|
| Active Comparator: all on six group<br>4 patients received 6-implant supported fixed prosthesis | Procedure: implant supported maxillary fixed prosthesis<br>* Maxillary fixed prosthesis according to all on four or all on six concept<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| anterior area index | outcome is being evaluated by radiograph | six months |