- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning NCT07778199
Passive Fit of Implant-Supported Frameworks: Digital vs Conventional Impressions
Passive Fit Evaluation of Full-Arch Implant-supported Frameworks Using Digital and Conventional Impression Techniques: Crossover Study
Studieöversikt
Status
Betingelser
Detaljerad beskrivning
Full-arch implant-supported fixed prostheses require a high degree of passive fit to avoid mechanical and biological complications. While digital impression workflows are increasingly used as alternatives to conventional splinted impressions, evidence directly comparing their clinical accuracy for complete-arch implant frameworks remains limited, particularly for the IO-Connect non-calibrated splinting system and the Reverse Scan Body technique.
Eight completely edentulous patients with at least four mandibular implants will be enrolled. Using a crossover design, each patient will undergo all three impression techniques: Group I (IO-Connect splinted scan bodies), Group II (Reverse Scan Body technique), and Group III (conventional splinted open-tray impression with polyvinyl siloxane and Type IV stone casts). For each technique, a corresponding implant-supported framework will be fabricated and evaluated for passivity of fit using the Sheffield one-screw test and periapical radiographs taken with a paralleling device to assess microgaps at the implant-framework interface.
Studietyp
Inskrivning (Beräknad)
Fas
- Inte tillämpbar
Kontakter och platser
Studiekontakt
- Namn: Ahmed H Hazem Elsayed Helmi Atwa, BDS
- Telefonnummer: +20 1092758696
- E-post: ahmedhazem@mans.edu.eg
Studieorter
-
-
Dakahlia Governorate
-
Al Mansurah, Dakahlia Governorate, Egypten
- Rekrytering
- Faculty of Dentistry, Mansoura University
-
Kontakt:
- Ahmed H Hazem Elsayed Helmi Atwa, BDS
- Telefonnummer: +20 1092758696
- E-post: ahmedhazem@mans.edu.eg
-
Huvudutredare:
- Ahmed Hazem Elsayed Helmi Atwa, BDS
-
-
Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
- Äldre vuxen
Tar emot friska volontärer
Beskrivning
Inclusion Criteria:
- Completely edentulous patients requiring full-arch implant-supported fixed prosthesis
- Age 35-70 years
- Adequate mandibular bone to place at least four implants without major grafting
- Ability to undergo digital scanning and radiographic evaluation
- Signed informed consent
Exclusion Criteria:
- Systemic conditions affecting healing (uncontrolled diabetes, immunosuppression)
- History of head/neck radiotherapy or bisphosphonate therapy
- Active oral infection or severe bruxism
- Strong gag reflex preventing accurate scanning
- Poor compliance or unwillingness to attend follow-up visits
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Behandling
- Tilldelning: Randomiserad
- Interventionsmodell: Crossover tilldelning
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Aktiv komparator: Group I: IO-Connect
Patients received complete-arch implant-supported frameworks fabricated using digital impressions obtained with IO-Connect non-calibrated splinted scan bodies.
|
Digital impression of the mandibular arch obtained using IO-Connect non-calibrated splinted scan bodies to fabricate the implant-supported framework for Group I.
|
|
Aktiv komparator: Group II: Reverse Scan Body
Patients received complete-arch implant-supported frameworks fabricated using digital impressions obtained with the Reverse Scan Body (RSB) technique.
|
Digital impression obtained using the Reverse Scan Body (RSB) technique, involving extraoral scanning of scan bodies and superimposition with intraoral tissue scans, to fabricate the implant-supported framework for Group II.
|
|
Aktiv komparator: Group III: Conventional Impression
Patients received complete-arch implant-supported frameworks fabricated using a conventional splinted open-tray impression technique.
|
Conventional splinted open-tray impression using polyvinyl siloxane material and Type IV dental stone to fabricate the implant-supported framework for Group III.
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Passive Fit Assessed by Sheffield One-Screw Test
Tidsram: The evaluation of passive fit by Sheffield one-screw test will be done 3 months after implant placement (3M-IP), at framework try-in for each of the three impression techniques.
|
The framework was seated on all implants and a single distal screw was fully tightened; remaining screw sites were examined visually and tactilely for lifting, rocking, or gaps as an indicator of passive fit.
|
The evaluation of passive fit by Sheffield one-screw test will be done 3 months after implant placement (3M-IP), at framework try-in for each of the three impression techniques.
|
|
Passive Fit Assessed by Periapical Radiographs
Tidsram: The evaluation of passive fit by periapical radiographs will be done 3 months after implant placement, at framework try-in for each of the three impression techniques.
|
Intraoral periapical radiographs were obtained at each implant site using a paralleling device and evaluated for microgaps at the implant-framework interface.
|
The evaluation of passive fit by periapical radiographs will be done 3 months after implant placement, at framework try-in for each of the three impression techniques.
|
Samarbetspartners och utredare
Sponsor
Utredare
- Studiestol: Fatma A El-Waseef, PhD, Mansoura University
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Primärt slutförande (Beräknad)
Avslutad studie (Beräknad)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- MS.25-12-95
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
Läkemedels- och apparatinformation, studiedokument
Studerar en amerikansk FDA-reglerad läkemedelsprodukt
Studerar en amerikansk FDA-reglerad produktprodukt
Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .