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The Effect of Functional Crown Lengthening Versus Deep Margin Elevation on Periodontal Tissues
Sponsor: Ain Shams University
Summary
The present study will evaluate and compare the effect of functional CL and DME in the treatment of posterior teeth with class II caries clinically and on the level of TNF-α in the GCF of treated teeth. Clinical evaluation of periodontal tissue in the form of probing depth as a primary outcome, clinical attachment level, plaque index, bleeding index, gingival index, pink aesthetic score, Radiographic evaluation of biological width and the level of TNF-α in the GCF as a secondary outcome.
Official title: The Effect of Functional Crown Lengthening Versus Deep Margin Elevation on Periodontal Tissues (A Randomized Clinical Trial With Biochemical Analysis)
Key Details
Gender
All
Age Range
20 Years - 50 Years
Study Type
INTERVENTIONAL
Enrollment
20
Start Date
2026-02-01
Completion Date
2026-10-01
Last Updated
2026-02-02
Healthy Volunteers
No
Conditions
Interventions
Functional Crown lengthening
patients will undergo functional crown lengthening by raising a full thickness flap with osseous resection to establish a distance of 3 mm between the cervical margin of the cavity and the bone crest. Osteoplasty was performed in the adjacent and neighboring tooth surfaces to accomplish a smooth bone contour. The flaps will then be sutured in their new position
Deep Margin Elevation
patients will undergo deep margin elevation through a two-step direct restoration performed using the concepts of Progressive Matrixing and Wedging where the Deep subgingival cavity margin will be acquired. Then isolation by rubber dam. A curved matrix will seal the margin without any gingival or rubber dam entrapped in between. One step adhesive system will be performed under rubber dam isolation. Composite resin base is applied to raise the margin by about 2 mm. A bulk fill packable or flowable composite can be used. Finishing will be done using polishing strips and disks. Finally a bitewing radiograph will be taken to check the presence of overhangs or gaps before the final restoration.