The effect of correlative risk factors on esthetic outcome of soft tissue for implant-supported single tooth restoration in anterior maxilla

PURPOSE:To evaluate the soft tissue around single-tooth implant in anterior maxilla with a newly developed pink esthetic score(PES)at the time of crown placement and 6-month follow-up,and to analyze the correlative factors affecting the assessment of PES.METHODS:31 patients subjective to single-tooth replacement with ITI implant-supported restoration in anterior maxilla were included.Assessments of soft tissue after crown placement and 6-month follow-up were made.At the same time,age of the patients,abutment type,gingival biotype were recorded and the height of keratinized mucosa,the distance between alveolar crest and implant shoulder,periodontal index were measured.The correlations between PES and the factors were analyzed by Spearman rank correlation.RESULTS:PES for single-tooth implant was 6.90±2.52 at the time of crown placement and 9.55±2.15 after 6-month follow-up.PES had a higher score correlated with thick gingival biotype,solid abutment,wider keratinized mucosa,less distance between alveolar crest and implant shoulder and had no relation to the age of patients and periodontal index.CONCLUSIONS:Esthetic outcome of soft tissue for single tooth implant restoration is affected by many factors according to PES assessment.