الفهرس 
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Abstract
The aim of this study is to compare the clinical effectiveness and patient satisfaction between cryosurgery and electro-surgery in physiologic gingival depigmentation. Materials and methods: I- Patient selection: ten Patients with physiologic gingival pigmentation were selected from the Outpatients Clinic of Oral Medicine, Periodontology, Diagnosis and Oral Radiology Department, Faculty of Dentistry- Mansoura University. Inclusion criteria: Patients with physiological gingival pigmentation, Age range from 18-30 years old, Healthy gingival condition. Exclusion criteria: Patients with systemic diseases, Pregnant women, Smokers. II- Study design: Before undertaking any of the depigmentation procedures, Complete medical history and dental history and Standard digital photographs were taken pre-operatively. The anterior sextant will be divided into left and right segments, one segment was treated randomly by cryosurgery and the other removed by electrosurgery. The pigmented area was evaluated and compared pre-operatively and post operatively according to: 1- Dummett-Gupta Oral Pigmentation Index, 2- Hedin melanin index for the extent of pigmented area, 3- Pain VAS (Visual Analogue Scale), 4-Intra-operative bleeding score, 5- Wound healing score. Results: Both techniques treated the pigmentation successfully, no recurrence after 3-6 months, the gingival color was stable except in 2 cases little pigmentation recurred in both techniques. The pain was the same in both techniques. Conclusions: Cryotherapy with liquid nitrogen and electro-surgery techniques were both effective for treatment of gingival pigmentation. Comparing these two treatment modalities, both techniques are acceptable in the treatment of gingival depigmentation and had pleasing appearance 6 months postoperatively. Clinical Significance: There was no significant difference in removing physiologic pigmentation by both techniques. Screen reader support enabled. The aim of this study is to compare the clinical effectiveness and patient satisfaction between cryosurgery and electro-surgery in physiologic gingival depigmentation. Materials and methods: I- Patient selection: ten Patients with physiologic gingival pigmentation were selected from the Outpatients Clinic of Oral Medicine, Periodontology, Diagnosis and Oral Radiology Department, Faculty of Dentistry- Mansoura University. Inclusion criteria: Patients with physiological gingival pigmentation, Age range from 18-30 years old, Healthy gingival condition. Exclusion criteria: Patients with systemic diseases, Pregnant women, Smokers. II- Study design: Before undertaking any of the depigmentation procedures, Complete medical history and dental history and Standard digital photographs were taken pre-operatively. The anterior sextant will be divided into left and right segments, one segment was treated randomly by cryosurgery and the other removed by electrosurgery. The pigmented area was evaluated and compared pre-operatively and post operatively according to: 1- Dummett-Gupta Oral Pigmentation Index, 2- Hedin melanin index for the extent of pigmented area, 3- Pain VAS (Visual Analogue Scale), 4-Intra-operative bleeding score, 5- Wound healing score. Results: Both techniques treated the pigmentation successfully, no recurrence after 3-6 months, the gingival color was stable except in 2 cases little pigmentation recurred in both techniques. The pain was the same in both techniques. Conclusions: Cryotherapy with liquid nitrogen and electro-surgery techniques were both effective for treatment of gingival pigmentation. Comparing these two treatment modalities, both techniques are acceptable in the treatment of gingival depigmentation and had pleasing appearance 6 months postoperatively. Clinical Significance: There was no significant difference in removing physiologic pigmentation by both techniques.