## Abbreviations
(2017) [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] Discoloration of the mucosa caused by different restorative materials--A spectrophotometric in vitro study. _Clin. Oral Implants Res._**2017**, _28_, 1133-1138. [CrossRef]
* [PERSON] et al. (2010) [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON] Factors affecting soft tissue level around anterior maxillary single-tooth implants. _Clin. Oral Implants Res._**2010**, _21_, 662-670. [CrossRef] [PubMed]
* [PERSON] et al. (2018) [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; et al. Peri-implant diseases and conditions: Consensus report of workgroup 4 of the 2017 World Workshop on the Classification of Periodontal and Peri-implant Diseases and Conditions. _J. Clin. Periodontol._**2018**, _45_ (Suppl. 20), S286-S291. [CrossRef]
* [PERSON] et al. (2020) [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON] Factors associated with the presence of peri-implant buccal soft tissue dehiscences: A case-control study [published online ahead of print, 2020 Jan 24]. _J. Periodontol._**2020**. [CrossRef]
* [PERSON] et al. (2013) [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] A novel surgical-prostictic approach for soft tissue dehiscence coverage around single implant. _Clin. Oral Implants Res._**2013**, _24_, 957-962. [CrossRef]
* [PERSON] et al. (2019) [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON] Treatment of buccal soft tissue dehiscence around single implant: 5-year results from a prospective study. _Clin. Oral Investig._**2019**, _23_, 1977-1983. [CrossRef] [PubMed]
* [PERSON] et al. (2019) [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Classification of facial peri-implant soft tissue dehiscence/deficiencies at single implant sites in the esthetic zone. _J. Periodontol._**2019**, _90_, 1116-1124. [CrossRef] [PubMed]
* [PERSON] et al. (2005) [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Evaluation of soft tissue around single-tooth implant crowns: The pink esthetic score. _Clin. Oral Implants Res._**2005**, _16_, 639-644. [CrossRef]
* [PERSON] et al. (2009) [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON]; [PERSON]; [PERSON] Outcome evaluation of early placed maxillary anterior single-tooth implants using objective esthetic criteria: A cross-sectional, retrospective study in 45 patients with a 2- to 4-year follow-up using pink and white esthetic scores. _J. Periodontol._**2009**, _80_, 140-151. [CrossRef]
* [PERSON] (1963) [PERSON]; [PERSON] [PERSON] Periodontal Disease in pregnancy.I. Prevalence and severity. _Acta Odontol. Scand._**1963**, _21_, 533-551. [CrossRef] [PubMed]
* [PERSON] and [PERSON] (1964) [PERSON]; [PERSON] Periodontal disease in pregnancy. II. Correlation between oral hygiene and periodontal condition. _Acta Odontol. Scand._**1964**, _22_, 121-135. [CrossRef]* [PERSON] et al. (2014) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] [PERSON] A mucogingival technique for the treatment of multiple recession defects in the mandibular anterior region: A case series with a 2-year follow-up. _Int. J. Periodontics Restor. Dent._**2014**, _34_, 345-352. [CrossRef] [PubMed]
* [PERSON] (1995) [PERSON]; [PERSON] [PERSON] Coronally positioned palatal sliding flap. _Int. J. Periodontics Restor. Dent_**1995**, _15_, 298-310. * [PERSON] et al. (2020) [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON] Contour Management of Implant Restorations for Optimal Emergence Profiles: Guidelines for Immediate and Delayed Provisional Restorations. _Int. J. Periodontics Restor. Dent._**2020**, _40_, 61-70. [CrossRef] [PubMed]
* [PERSON] (1997) [PERSON] Custom impression coping for an exact registration of the healed tissue in the esthetic implant restoration. _Int.