Evaluation of Er,Cr:YSGG LASER in flapless functional crown lengthening (A randomized controlled clinical trial with microbial analysis)

Document Type : Original Article

Authors

1 Master degree candidate at Oral medicine, Periodontology and Oral Diagnosis Department, Faculty of Dentistry, Ain Shams University, Cairo, Egypt.

2 Assistant Professor of Oral Medicine and Periodontology, Faculty of Dentistry, Ain Shams University

3 Professor of Clinical Pathology and Hematology, Faculty of Medicine, Ain Shams University.

4 Lecturer of Oral Medicine, Periodontology and Oral diagnosis, Faculty of Dentistry, Ain Shams University.

Abstract

Background: Several studies have described the benefits of LASER when used for crown lengthening (CL). However, there has been a lack of clinical trials comparing surgical functional crown lengthening (FCL) and LASER flapless CL. The aim of this study was to compare both methods together in terms of soft-tissue wound healing, gingival marginal stability and sub-gingival bacterial load reduction.
Subjects and methods: Twenty patients with eligible teeth for FCL were recruited and randomly allocated to either; Group I: 10 posterior teeth indicated for FCL received closed flap laser assisted CL utilizing (Er,Cr:YSGG) laser or Group II : 10 posterior teeth indicated for FCL received open flap conventional surgical technique. Soft tissue healing was evaluated on the 7th day,45th day and after 3 months. Gingival marginal stability was evaluated immediately after surgery and after 3 months.Sub-gingival bacterial load was assessed at base-line, on the 7th day and after 45 days.
Results: Group 1 showed significant better soft tissue healing after 7 days but there was no significant difference between the 2 groups after 45 days as well as after 3 months. Regarding the gingival marginal stability, there was no significant difference between both groups. There was a significant reduction in sub-gingival bacterial load in both groups, however, group 1 showed significant lower bacterial load after 7 days as well as after 45 days.

Conclusion: Closed flap laser-assisted CL using Er,Cr:YSGG laser can be used as an alternative procedure for conventional surgical FCL with better and faster healing and bacterial disinfection.

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Egyptian Dental Journal
Volume 69, Issue 2 - Serial Number 3
April (Oral Medicine, X-Ray, Oral Biology & Oral Pathology)
April 2023
Pages 1059-1068

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