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

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT06114069

Enrollment

Registered

2023-11-02

Start date

2022-05-10

Completion date

2024-08-14

Last updated

2024-11-21

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Prosthesis Survival

Brief summary

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

Interventions

PROCEDUREimplant supported maxillary fixed prosthesis

Maxillary fixed prosthesis according to all on four or all on six concept

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

SINGLE (Subject)

Intervention model description

The patients were classified into 2 groups: 1. Group I; 4 patients received 4-implant supported fixed prosthesis. 2. Group II; 4 patients received 6-implant supported fixed prosthesis.

Eligibility

Sex/Gender

ALL

Age

30 Years to 65 Years

Healthy volunteers

Yes

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.

Design outcomes

Primary

Measure	Time frame	Description
anterior area index	six months	outcome is being evaluated by radiograph

Countries

Egypt

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026