Retention of Three Different Types of Telescopic Attachments
- Conditions
- EdentulismDenture Retention
- Interventions
- Device: telescopic overdenture
- Registration Number
- NCT06632548
- Lead Sponsor
- Moatz Aly Ahmed Hussien
- Brief Summary
This study was conducted on thirty patients. These patients were divided into three groups in a random manner to compare the retention forces between three different types of secondary crowns used to stabilize two implant mandibular overdentures. in all groups the primary coping was fabricated from milled titanium while the secondary coping was milled titanium in first group ,3D printed cobalt chromium in the second group and milled poly ether ketone ketone in the third group the retention forces was measured using forcemeter immediately after insertion and after 3,6, months
- Detailed Description
A thirty edentulous patients Was selected from outpatient clinic of
Exclusion criteria:
1. systemic and metabolic disorders that may complicate osseointegration.
2. Patients receiving bisphosphonates.
3. patients receiving radiotherapy. The patients was assigned into three groups using balanced randomly. Patients was randomly allocated into one of three groups using random numbers generated using Excel program.
Group I included patients who received 2 implants and telescopic overdentures with milled titanium primary and secondary coping Group II included patients who received telescopic overdentures with milled titanium primary coping and three dimensionally printed secondary coping GroupIII patients recived milled titanium primary coping and poly ether ketone ketone secondary copings (PEKK) secondary coping All patients signed an informed consent.
Surgical and prosthetic protocols:
A radiographic stent with gutta percha markers at the canine region was fabricated and the patient was instructed to wear it during cone beam radiographic evaluation to evaluate proposed implant sites regarding bone height and thickness, and approximation to vital structures (mental foramen).
Radiographic template was converted to surgical template.
The two implants was inserted nearly parallel as possible. If inclination of the implants was inevitable buccally or lingually due to mandibular concavities, the inclination was compensated later during design of primary copings.
The implants was inserted in the canine region with two steps surgical protocol. After three months of the insertion and osseointegration implants was exposed and healing abutments was inserted after gingival healing implant level impression will be taken.
The metallic primary coping was milled with 2-degree convergence for all cases while the second coping was milled titanium or 3D printed cobalt chromium or milled PEKK according the patient group.
the primary copings was screwed to the implants and the secondary coping pick up was done and patient was instructed to follow oral hygiene measures and was scheduled for periodic follow up every 3 months.
Evaluation of overdenture retention:
Force meter device was used to measure the retention of the mandibular overdenture in Newton.
The patient was seated on upright position and asked to open his mouth until the occlusal surface of the lower denture is parallel to the floor and the maximum dislodging force to remove the denture is recorded using digital forcemeter.
Measurement of retention forces was made immediately after overdenture insertion and repeated at 3,6,9and 12 months after insertion after by independent dental personnel blinded to treatment groups.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 30
-
un-satisfaction with the retention of mandibular dentures due to mandibular ridge atrophy and desired to have more stable prosthesis,
-
sufficient remaining bone in height, width and thickness in the interforaminal area to allow installation of at least 3.5mm diameter implants.
-
Adequate amount of interarch space of at least 12mm from the occlusal plane of the mandibular denture to the mucosa of the ridge. Patients with the 4- age range 55 to 75 years.
- systemic and metabolic disorders that may complicate osseointegration. 2) Patients receiving bisphosphonates. 3) patients receiving radiotherapy.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description milled titanium secondary coping telescopic overdenture group I patients received primary and secondary coping made of milled titanium 3D printed cobalt chromium secondary coping telescopic overdenture group II patients received primary coping made of milled titanium and secondary coping made of 3D printed cobalt chromium milled poly ether ketone ketone secondary coping telescopic overdenture group III patients received primary coping made of milled titanium and secondary coping made of milled poly ether ether ketone
- Primary Outcome Measures
Name Time Method retention forces from insertion time up to one year follow up retention forces of three different type secondary coping telescopic attachments used to stabilize two implant mandibular overdenture these attachments are made of either milled titanium, 3D printed cobalt chromium or milled poly ether ketone ketone
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Faculty of Dentistry Minia University
🇪🇬Elminia, Egypt