Actively Recruiting
Impact of Impression Techniques on Patient Satisfaction and Chewing Efficiency in 3D-Printed Implant Overdentures: A Crossover Study
Led by Mansoura University · Updated on 2026-01-29
16
Participants Needed
1
Research Sites
4 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are evaluating three different impression techniques for making 3D-printed mandibular implant overdentures in patients who have lost all their lower teeth. This randomized crossover trial involves sixteen patients aged 45 to 70 years who will receive two implants in the lower jaw. The study aims to compare how these techniques influence chewing efficiency and patient satisfaction. The three impression methods being studied are: conventional open-tray implant-level impression, functionally generated reline impression, and mucostatic base with functional borders impression. Each participant will wear three different overdentures made using these techniques, each for three months. Between each overdenture period, there is a two-week washout phase during which a provisional denture is worn. The order of techniques is randomly assigned for each patient. Participants will undergo assessments at 3, 6, and 9 months after overdenture insertion. Chewing efficiency will be measured using a color-mixing ability test, and patient satisfaction will be recorded using a Visual Analog Scale. The study includes clinical evaluations and questionnaires to monitor the effects of each impression technique on both function and patient experience.
CONDITIONS
Brief Title
3D-Printed Implant Overdentures: Comparing Impression Techniques
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Healthy patients without systemic diseases affecting bone resorption such as uncontrolled diabetes or osteoporosis
- Residual alveolar ridges covered with healthy, firm mucosa
- Adequate mandibular bone length and width to accommodate standard implant sizes
- Angle's Class I maxillo-mandibular relationship
- Adults aged 45 to 70 years
- Completely edentulous in the lower jaw
You will not qualify if you...
- Absolute contraindications to implant placement such as active cancer or immune system diseases
- History of head and neck irradiation or chemotherapy within the past 3 years
- Metabolic bone diseases including uncontrolled diabetes, osteoporosis, or hyperparathyroidism
- Parafunctional habits such as bruxism or clenching
- Smoking or alcoholism
- Any physical or medical conditions that may interfere with study follow-up or implant success
- Age below 45 years or above 70 years if applicable
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Approximately 11 months total (3 months per overdenture plus two-week washout periods)
Participants receive three different mandibular implant overdentures fabricated using different impression techniques, each worn for three months with a two-week washout period using a provisional denture between overdentures.
3 treatment periods of 3 months each with 2 two-week washout periods in between; follow-up visits at 3, 6, and 9 months after each overdenture insertion
Trial Site Locations
Total: 1 location
1
Faculty of Dentistry, Mansoura University
Al Mansurah, Dakahlia Governorate, Egypt, 35516
Actively Recruiting
Research Team
S
Shimaa E Aboelenin
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
RANDOMIZED
Model
CROSSOVER
Primary Purpose
TREATMENT
Number of Arms
3
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