Ovate Pontic Versus Essix Provisional After Tooth Extraction and Alveolar Ridge Preservation (Pontic-Essix) (Pontic-Essix)
Socket Sealing With a Fixed Ovate Pontic Provisional Versus a Removable Provisional Following Tooth Extraction and Alveolar Ridge Preservation: A Randomized Controlled Trial
연구 개요
상태
상태
정황
정황
개입 / 치료
개입 / 치료
상세 설명
Following tooth extraction, dimensional changes of the alveolar ridge and loss of interproximal soft tissue height may compromise esthetic and prosthetic outcomes. Alveolar ridge preservation attenuates hard tissue resorption but provides limited active support for the overlying soft tissues during healing. An ovate pontic provisional restoration may provide active soft tissue support and thereby help preserve interproximal soft tissue height. To date, no randomized controlled trial has compared a fixed ovate pontic provisional restoration with a removable non-contact Essix provisional restoration in the context of alveolar ridge preservation.
This is a single-center, open-label, confirmatory, randomized controlled trial with two parallel groups and 1:1 allocation. An adaptive design with an internal pilot phase (n=20) and blinded sample size re-estimation based on the residual variance of the primary endpoint is applied, up to a predefined maximum of 40 participants.
All participants undergo minimally traumatic, flapless single non-molar tooth extraction and alveolar ridge preservation with Bio-Oss Collagen. Test group: socket sealing by a fixed, 3D-printed ovate pontic provisional restoration providing active soft tissue support. Control group: socket sealing with Mucograft Seal plus a removable Essix-type provisional restoration positioned without intentional soft tissue contact.
Follow-up visits are performed at 2 weeks, 4 weeks, and 5 months. At baseline (T0) and at 5 months, intraoral surface scans, clinical photographs, cone-beam computed tomography, and patient-reported outcomes are collected. The between-group treatment effect on the primary endpoint is estimated using ANCOVA with the 5-month value as dependent variable, treatment group as fixed factor, and the baseline value as covariate; jaw is included as an additional between-subject factor.
연구 유형
연구 유형
등록 (추정된)
등록
단계
단계
- 해당 없음
연락처 및 위치
연구 연락처
연구 연락처
- 이름: Nicole Schenk, Dr. med. dent.
- 전화번호: +41 31 684 06 35
- 이메일: nicole.schenk@unibe.ch
연구 연락처 백업
- 이름: Martin Schimmel, Prof. Dr. med. dent.
- 전화번호: +41 31 684 06 35
- 이메일: martin.schimmel@unibe.ch
연구 장소
-
-
Canton of Bern
-
Bern, Canton of Bern, 스위스, 3010
- University of Bern, Department of Reconstructive Dentistry and Gerodontology
-
연락하다:
- Nicole Schenk, Dr. med. dent.
- 전화번호: +41 31 684 06 35
- 이메일: nicole.schenk@unibe.ch
-
-
참여기준
자격 기준
자격 기준
공부할 수 있는 나이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
설명
Inclusion Criteria:
- Adults aged 18 years or older
- ASA physical status I or II
- Requiring a single non-molar tooth extraction (incisor, canine, or premolar) in the maxilla or mandible, with planned tooth replacement
- Extraction site bounded by natural, periodontally stable adjacent teeth
- Intact alveolar socket upon extraction, or no more than one bony wall (facial, palatal, or lingual) presenting a dehiscence extending less than 50% of the total bony wall height
- Willingness and ability to comply with the follow-up protocol
- Ability to give informed consent, as documented by signature
Exclusion Criteria:
- Current smokers, or former smokers who quit less than 6 months before extraction
- Uncontrolled diabetes mellitus (HbA1c > 7.0%)
- Clinical attachment loss ≥ 2 mm at the extraction site
- Active or recent chemotherapy, or history of head and neck radiotherapy
- Current or previous bisphosphonate therapy within the past 10 years
- Immunosuppressive medication
- Active oral or systemic acute infection
- Severe hematologic disorder, hepatic or renal failure, or any clinically relevant bleeding disorder or anticoagulant medication that cannot be safely managed for the planned surgical procedure
- Pregnancy or lactation
- Known allergy or hypersensitivity to any of the study materials, including bovine-derived bone substitute, porcine-derived collagen matrix, or collagen-containing biomaterials
- Any other disease or medication that may compromise normal wound healing
- Inability to follow the study procedures (e.g., insufficient language comprehension, cognitive impairment, psychological disorder, or dementia)
- Known or suspected non-compliance
- Participation in another clinical trial that may interfere with the present study
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 치료
- 할당: 무작위
- 중재 모델: 병렬 할당
- 마스킹: 하나의
팔의 수
무기와 개입
참가자 그룹 / 팔참가자 그룹 / 팔 |
개입 / 치료개입 / 치료 |
|---|---|
|
실험적: Fixed ovate pontic provisional
Following minimally traumatic, flapless tooth extraction, the alveolar socket is grafted with Bio-Oss Collagen.
Socket sealing is achieved by a fixed, 3D-printed provisional restoration incorporating an ovate pontic design that extends approximately 2 mm apical to the mucosal margin, providing active soft tissue support to maintain interproximal papilla height and facial soft tissue contour during healing.
The provisional is retained by adhesive bonding or temporary cementation on the adjacent teeth.
No additional collagen matrix or sutures are placed.
|
Deproteinized bovine bone mineral with 10% collagen (Geistlich Pharma AG, Wolhusen, Switzerland).
Used for alveolar ridge preservation by socket grafting after tooth extraction.
CE-marked and used within the approved indication.
다른 이름들:
Patient-specific 3D-printed provisional restoration (PMMA or comparable clinically approved dental provisional material) incorporating an ovate pontic design.
Retained by adhesive bonding or temporary cementation on the adjacent teeth.
The convex, highly polished pontic extends approximately 2 mm apical to the mucosal margin and above the level of the bone graft, providing active soft tissue support.
|
|
활성 비교기: Removable Essix provisional with collagen matrix seal
Following minimally traumatic, flapless tooth extraction, the alveolar socket is grafted with Bio-Oss Collagen.
The socket is sealed with a porcine-derived collagen matrix (Mucograft Seal) secured with four to six single interrupted sutures, without primary closure.
A removable Essix-type provisional restoration with an integrated artificial tooth is delivered; the pontic is positioned above the mucosal level without intentional soft tissue contact.
|
Deproteinized bovine bone mineral with 10% collagen (Geistlich Pharma AG, Wolhusen, Switzerland).
Used for alveolar ridge preservation by socket grafting after tooth extraction.
CE-marked and used within the approved indication.
다른 이름들:
Patient-specific 3D-printed provisional restoration (PMMA or comparable clinically approved dental provisional material) incorporating an ovate pontic design.
Retained by adhesive bonding or temporary cementation on the adjacent teeth.
The convex, highly polished pontic extends approximately 2 mm apical to the mucosal margin and above the level of the bone graft, providing active soft tissue support.
Patient-specific removable thermoplastic Essix-type appliance with an integrated artificial tooth.
The pontic is positioned above the mucosal level without intentional soft tissue contact.
Delivered at the surgical visit after socket sealing with the collagen matrix.
|
연구는 무엇을 측정합니까?
주요 결과 측정
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Interproximal soft tissue height at 5 months
기간: Baseline (T0) and 5 months after tooth extraction
|
Interproximal soft tissue height at 5 months, calculated per participant as the mean of the mesial and distal measurements and expressed in millimeters.
Measurements are obtained by digital superimposition of baseline and 5-month intraoral surface scans (Geomagic Control X, 3D Systems) by an independent, calibrated examiner.
The between-group treatment effect is estimated using ANCOVA with the 5-month value as the dependent variable, treatment group as a fixed factor, baseline value as a covariate, and jaw as an additional between-subject factor.
|
Baseline (T0) and 5 months after tooth extraction
|
2차 결과 측정
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Midfacial mucosal level at 5 months
기간: Baseline (T0) and 5 months
|
Vertical position of the midfacial mucosal margin at 5 months (mm), assessed on superimposed intraoral surface scans.
The between-group difference is estimated using ANCOVA with the 5-month value as dependent variable and the baseline value as covariate.
|
Baseline (T0) and 5 months
|
|
Horizontal ridge contour at 5 months
기간: Baseline (T0) and 5 months
|
Horizontal ridge contour at 5 months (mm) at 1, 3, and 5 mm apical to the baseline mucosal reference, assessed on superimposed intraoral surface scans.
Baseline-adjusted analysis at each level.
|
Baseline (T0) and 5 months
|
|
Mucosal thickness at 5 months
기간: Baseline (T0) and 5 months
|
Mucosal thickness at 5 months (mm) at 1, 3, and 5 mm apical to the baseline mucosal reference.
Baseline-adjusted analysis at each level
|
Baseline (T0) and 5 months
|
|
Volumetric soft tissue at 5 months
기간: Baseline (T0) and 5 months
|
Volumetric soft tissue measurement at 5 months (mm3) within the defined region of interest, assessed on superimposed intraoral surface scans.
Baseline-adjusted analysis.
|
Baseline (T0) and 5 months
|
|
Alveolar hard tissue volume at 5 months
기간: Baseline (T0) and 5 months
|
Volumetric measurement of alveolar hard tissue at 5 months (mm3), assessed on superimposed CBCT data.
Baseline-adjusted analysis.
|
Baseline (T0) and 5 months
|
|
Alveolar hard tissue contour at 5 months
기간: Baseline (T0) and 5 months
|
Linear measurement of alveolar hard tissue contour at 5 months (mm), assessed on superimposed CBCT data.
Baseline-adjusted analysis.
|
Baseline (T0) and 5 months
|
|
Postoperative discomfort (VAS)
기간: 2 weeks and 4 weeks after tooth extraction
|
Postoperative discomfort assessed on a 100-mm visual analogue scale, ranging from 0 mm (no discomfort) to 100 mm (worst imaginable discomfort).
|
2 weeks and 4 weeks after tooth extraction
|
|
Patient satisfaction with function (VAS)
기간: 5 months
|
Patient-rated satisfaction with the function of the provisional restoration, assessed on a 100-mm visual analogue scale, ranging from 0 mm (completely unsatisfied) to 100 mm (completely satisfied).
|
5 months
|
|
Patient satisfaction with esthetics (VAS)
기간: 5 months
|
Patient-rated satisfaction with the esthetics of the provisional restoration, assessed on a 100-mm visual analogue scale, ranging from 0 mm (completely unsatisfied) to 100 mm (completely satisfied).
|
5 months
|
|
Patient satisfaction with comfort (VAS)
기간: 5 months
|
Patient-rated satisfaction with the comfort of the provisional restoration, assessed on a 100-mm visual analogue scale, ranging from 0 mm (completely unsatisfied) to 100 mm (completely satisfied).
|
5 months
|
|
Overall treatment satisfaction (VAS)
기간: 5 months
|
Patient-rated overall satisfaction with the treatment received, assessed on a 100-mm visual analogue scale, ranging from 0 mm (completely unsatisfied) to 100 mm (completely satisfied).
|
5 months
|
|
Willingness to undergo the same procedure again (VAS)
기간: 5 months
|
Patient-rated willingness to undergo the same procedure again, assessed on a 100-mm visual analogue scale, ranging from 0 mm (definitely not) to 100 mm (definitely yes).
|
5 months
|
|
Oral Health Impact Profile (OHIP-G14)
기간: Baseline (T0) and 5 months
|
German version of the Oral Health Impact Profile, 14-item version.
Summary score range 0 to 56; higher scores indicate worse oral health-related quality of life.
|
Baseline (T0) and 5 months
|
|
Geriatric Oral Health Assessment Index (GOHAI)
기간: Baseline (T0) and 5 months
|
German version of the Geriatric Oral Health Assessment Index.
Summary score range 12 to 60; higher scores indicate better oral health-related quality of life.
|
Baseline (T0) and 5 months
|
|
Adverse events and provisional-related complications
기간: Up to 5 months
|
Occurrence and rate of adverse events, including postoperative infection, impaired wound healing, soft tissue dehiscence, loss or displacement of the bone substitute or collagen matrix, allergic or hypersensitivity reactions, pressure-induced mucosal lesions, debonding of the fixed provisional restoration, or irritation related to the Essix provisional.
|
Up to 5 months
|
공동 작업자 및 조사자
수사관
수사관
- 수석 연구원: Nicole Schenk, Dr. med. dent., University of Bern, Department of Reconstructive Dentistry and Gerodontology
- 연구 의자: Martin Schimmel, Prof. Dr. med. dent., University of Bern, Department of Reconstructive Dentistry and Gerodontology
- 연구 책임자: Emilio Couso-Queiruga, PD Dr. med. dent., University of Bern, Department of Oral Surgery and Stomatology
간행물 및 유용한 링크
일반 간행물
- Avila-Ortiz G, Gubler M, Romero-Bustillos M, Nicholas CL, Zimmerman MB, Barwacz CA. Efficacy of Alveolar Ridge Preservation: A Randomized Controlled Trial. J Dent Res. 2020 Apr;99(4):402-409. doi: 10.1177/0022034520905660. Epub 2020 Feb 12.
- Couso-Queiruga E, Garaicoa-Pazmino C, Fonseca M, Chappuis V, Gonzalez-Martin O, Avila-Ortiz G. Interproximal Soft Tissue Height Changes After Unassisted Socket Healing vs Alveolar Ridge Preservation Therapy. Int J Periodontics Restorative Dent. 2024;44(5):520-533. doi: 10.11607/prd.6809.
연구 기록 날짜
연구 주요 날짜
연구 시작 (추정된)
연구 시작
기본 완료 (추정된)
기본 완료
연구 완료 (추정된)
연구 완료
연구 등록 날짜
최초 제출
최초 제출
QC 기준을 충족하는 최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
처음 게시됨
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
마지막 업데이트 게시됨
QC 기준을 충족하는 마지막 업데이트 제출
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
키워드
기타 연구 ID 번호
기타 연구 ID 번호
- Pontic-Essix
- 2026-01626 (기타 식별자: Swiss Ethics Committee (BASEC))
개별 참가자 데이터(IPD) 계획
개별 참가자 데이터(IPD)를 공유할 계획입니까?
IPD 계획 설명
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .