title: Quantification of gingival contour and volume from digital impressions as a novel method for assessing gingival health.
abstract: OBJECTIVE
  To evaluate the novel assessment of gingival contour volume measurement from digital impressions compared with traditional clinical indices (Modified Gingival Index and Bleeding Index) and oral microflora following a dental prophylaxis.
  
  
  METHODS
  Following baseline examinations and full mouth digital impression using the LAVA™ Oral Chairside Scanner (COS), subjects had one maxillary quadrant and the contra-lateral mandibular quadrant randomly allocated to receive a complete dental prophylaxis. Subjects then brushed twice daily at home using a standard toothpaste. After 1, 2, 4, 6 and 12 weeks gingivitis examinations and digital impressions of the maxillary and mandibular arches were taken.
  
  
  RESULTS
  Significant improvements in gingivitis for the prophylaxis versus no prophylaxis quadrants were observed up to six weeks using both the traditional gingivitis indices and the assessment of change in gingival contour volume from the digital impressions.
  
  
  CONCLUSIONS
  The assessment of changes in gingival contour volume may be a promising technique for the objective and quantitative clinical evaluation of products or procedures used to treat gingivitis. The effects of a dental prophylaxis were demonstrated by both this novel measure and traditional clinical indices.
authors.affiliation: GlaxoSmithKline Consumer Healthcare, Weybridge, Surrey, UK. Evelyn.E.Newby@gsk.com
authors.forename: Evelyn E
authors.initials: EE
authors.lastname: Newby
authors.forename: Alice
authors.initials: A
authors.lastname: Bordas
authors.forename: Carl
authors.initials: C
authors.lastname: Kleber
authors.forename: Jeff
authors.initials: J
authors.lastname: Milleman
authors.forename: Kim
authors.initials: K
authors.lastname: Milleman
authors.forename: Robert
authors.initials: R
authors.lastname: Keogh
authors.forename: Sheryl
authors.initials: S
authors.lastname: Murphy
authors.forename: Andrew
authors.initials: A
authors.lastname: Butler
authors.forename: Mary Lynn
authors.initials: ML
authors.lastname: Bosma
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001421:Bacteria, Anaerobic / Q000302:isolation & purification; D003761:Dental Impression Technique; D003773:Dental Plaque / Q000382:microbiology; D003777:Dental Prophylaxis; D005260:Female; D005891:Gingivitis / Q000175:diagnosis*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D016037:Single-Blind Method; D055815:Young Adult