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
연구 개요
상태
상세 설명
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.
연구 유형
등록 (추정된)
단계
- 해당 없음
연락처 및 위치
연구 연락처
- 이름: Ahmed H Hazem Elsayed Helmi Atwa, BDS
- 전화번호: +20 1092758696
- 이메일: ahmedhazem@mans.edu.eg
연구 장소
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Dakahlia Governorate
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Al Mansurah, Dakahlia Governorate, 이집트
- 모병
- Faculty of Dentistry, Mansoura University
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연락하다:
- Ahmed H Hazem Elsayed Helmi Atwa, BDS
- 전화번호: +20 1092758696
- 이메일: ahmedhazem@mans.edu.eg
-
수석 연구원:
- Ahmed Hazem Elsayed Helmi Atwa, BDS
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참여기준
자격 기준
공부할 수 있는 나이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
설명
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
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 치료
- 할당: 무작위
- 중재 모델: 크로스오버 할당
- 마스킹: 없음(오픈 라벨)
무기와 개입
참가자 그룹 / 팔 |
개입 / 치료 |
|---|---|
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활성 비교기: Group I: IO-Connect
Patients received complete-arch implant-supported frameworks fabricated using digital impressions obtained with IO-Connect non-calibrated splinted scan bodies.
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Digital impression of the mandibular arch obtained using IO-Connect non-calibrated splinted scan bodies to fabricate the implant-supported framework for Group I.
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활성 비교기: Group II: Reverse Scan Body
Patients received complete-arch implant-supported frameworks fabricated using digital impressions obtained with the Reverse Scan Body (RSB) technique.
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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.
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활성 비교기: Group III: Conventional Impression
Patients received complete-arch implant-supported frameworks fabricated using a conventional splinted open-tray impression technique.
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Conventional splinted open-tray impression using polyvinyl siloxane material and Type IV dental stone to fabricate the implant-supported framework for Group III.
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Passive Fit Assessed by Sheffield One-Screw Test
기간: 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.
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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.
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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.
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Passive Fit Assessed by Periapical Radiographs
기간: 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.
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Intraoral periapical radiographs were obtained at each implant site using a paralleling device and evaluated for microgaps at the implant-framework interface.
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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.
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공동 작업자 및 조사자
수사관
- 연구 의자: Fatma A El-Waseef, PhD, Mansoura University
연구 기록 날짜
연구 주요 날짜
연구 시작 (실제)
기본 완료 (추정된)
연구 완료 (추정된)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
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