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Evaluation of Supracrestal Gingival Tissue Following Surgical Crown Lengthening: A 6 Month Clinical Study.
MedLine Citation:
PMID:  23088528     Owner:  NLM     Status:  Publisher    
BACKGROUND- Previous studies on crown lengthening (CL) report contradictory results regarding stability of crown length gained at the time of surgery. The "3 mm rule" has dictated the amount of alveolar bone to be removed during CL surgery for decades. With the current understanding of wide variations in supracrestal gingival tissue (SGT) dimensions, bone removal can be customized to the situation. The purpose of this study was to assess alterations in periodontal tissue levels six months after CL surgery and to evaluate factors that may influence stability of CL achieved over time. METHODS- 64 patients requiring CL surgery on 64 teeth were included in this study. Clinical parameters were recorded along six surfaces of treated tooth and neighboring teeth. Sites were labeled as treated sites, adjacent sites and non adjacent sites. Bone was reduced based on the minimal amount of tooth structure required for restorative purpose and SGT dimensions at each site. Patients were again evaluated at 3 and 6 months. RESULTS- Significant soft tissue rebound (0.77 ± 0.58 mm) was observed 6 months after CL surgery. This rebound was found to be significantly correlated with periodontal biotype (r = 0.325, p = 0.000) and post suturing flap position (r = -0.601, p=0.000). SGT was not reestablished to its preoperative dimensions by the end of 6 months (p=0.001). CONCLUSION- Crown length gained during surgery significantly decreased at 6 months. Suturing the flap ≤ 3 mm from the osseous crest and thick-flat biotype were associated with greater tissue rebound.
Ritika Arora; S C Narula; R K Sharma; Shikha Tewari
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-22
Journal Detail:
Title:  Journal of periodontology     Volume:  -     ISSN:  1943-3670     ISO Abbreviation:  J. Periodontol.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8000345     Medline TA:  J Periodontol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Periodontics and Oral Implantology, Post graduate institute of dental sciences, Rohtak, Haryana, India.
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