Clinicians often encounter the need for crown lengthening in the practice of dentistry and have to make treatment decisions taking into consideration how to best address the biological, functional, and esthetic requirements of each particular case. The concept of crown lengthening was first introduced by D.W. Cohen (1962) and is presently a procedure that often employs some combination of tissue reduction or removal , osseous surgery , and/or orthodontics for tooth exposure and increasing the extent of supra gingival tooth structure for restoration of aesthetic purposes . Gingivectomy and gingivoplasty considered kind of crown lengthening procedure. Gingivectomy is defined as the excision of the soft tissue wall of a pocket. The procedure is usually combined with the recontouring of hyperplastic tissue by gingivectoplasty to restore physiological gingival form . Gingivoplasty is a reshaping of the gingiva to create physiologic gingival contours, with the sole purpose of recontouring the gingiva in the absence of pockets. In doing so, the complete anatomical crown becomes exposed and pseudo pockets are eliminated creating a better environment for periodontal health. Treatment options for crown lengthening procedures include: Surgical, Electrocautery or by Laser. The aim of the present study was to compare the practical effectiveness and postoperative parameters of using diode laser and electrocautery for crown lengthening procedure.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
80
single intervention by Sirolase ® lower power diode laser 970 ± 15 nm (0.5 watts) continuous emission, power =3 watts, fiber 320 μm.single intervention the follow-up until 6 months
single intervention by electrosurgical unit which was kept 38 watts rms ± 5%. The working frequency was adjusted to 1.5 MHz ± 5%.single intervention then follow-up until 6 months
Faculty of dental medicine, Al-Azhar University (Assiut branch)
Asyut, Asyut Governorate, Egypt
Epithelization rate
After gingivectomy operation, the surgical site was evaluated with hydrogen peroxide to detect the presence of epithelization. The mesio-distal width of the maxillary right central tooth was recorded for each patient, and photographs were calibrated via the reference values. all photographs were examined with the assistance of Image processing and analysis in Java, Image J software. In the areas subjected to hydrogen peroxide application and experiencing tissue reaction, there was a lack of an epithelial layer in the wound area.
Time frame: From enrollment to the end of treatment at 3 weeks
Transforming Growth Factor-β1 (TGF-β1) levels assessment
The levels of TGF-β1 in the GCF samples were determined using commercially available ELISA Kits
Time frame: From enrollment to the end of treatment at 8 weeks
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