Clinical Evaluation of Two Types of Transalveolar Sinus Floor Elevation

Summary

Background: Implant placement in the posterior maxilla is always troubled by the insufficient bone volume. Trans-alveolar sinus floor elevation (TSFE) has been proven a predictable surgical procedure to increase the bone height in the posterior maxilla. However, questions as the necessity of the bone grafting is necessary during the sinus lift and could the TSFE be performed when the residual bone height is below 5mm are still being debated. Besides, high-quality evidence on comparing the clinical outcome of transalveolar sinus floor elevation with osteotome and modified sinus floor elevation with crestal non-cutting drills is limited.

Methods/Design: 120 adult patients who fit the inclusion criterions are being recruited from the first clinical division, School and Hospital of Peking University (Beijing, China). All the patients are assigned into four groups according a table of random numbers. Participants receive 1) TSFE using osteotomes with bone grafting; 2) TSFE using osteotomes without bone grafting; 3) modified TSFE with bone grafting; and 4) modified TSFE without bone grafting. The clinical operators will be concealed with the assignment until the beginning of surgical procedures. In a one year follow up period, implant survival rates, complications, implant stability, bone remodeling around the implant and patient-reported outcome (visual analogue scale for intraoperative discomfort and postoperative pain) are observed and documented. The implant stability is gauged by the resonance frequency analysis for 7 times (2, 4,8,12,16,26,52 weeks). And the bone remodeling is observed and compared by CT scan.

Discussion: The result of the trial will support a better decision making in atrophy posterior maxilla when implant placement is needed. If favorable, the use of the modified TSFE would achieve as ideal outcome as the traditional TSFE but with less trauma and postoperative discomforts. Besides, whether the bone graft procedure is necessary for the TSFE will also be discussed.

Conditions

• Dental Implant
• Sinus Floor Augmentation

Interventions

DEVICE

traditional TSFE

The TSFE procedure is performed by osteotomes (Straumann AG, Basel, Switzland) and mallet as the traditional ways.

PROCEDURE

bone grafting materials

The bone substitute is placed into the siuns under the membrane before the implant placement

DEVICE

TSFE by DASK drills

The TSFE procedure is performed by DASK(Dentium Advanced Surgical Kits) drills (Dentium, Korea), the residual cortical plate of the sinus floor is grinded by the drills.

PROCEDURE

without bone grafting materials

The bone substitute will not be placed into the sinus before the implant placement.

Sponsors & Collaborators

• Peking University

  lead OTHER

Principal Investigators

• Feng Liu, Dr · Peking University hospital of stomatology, the first clinical division

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

70 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2017-12-02

Primary Completion

2019-12-25

Completion

2020-12-25

Countries

• China

Study Locations