92nd Congress of European Orthodontic Society , Stockholm, Sweden, 11 - 16 June 2016, pp.105
To evaluate the relationship of gingival thickness (GT) and the width of keratinized gingiva (WKG), which is considered to be a significant risk factor for gingival recession that can be seen in the mandibular anterior region due to orthodontic tooth movements, with different malocclusion groups and the amount of crowding.
SUBJECTS AND METHOD: One hundred and eighty seven periodontally healthy subjects (121 females, 66 males) were enrolled in the study and divided into three groups: Angle Class I, Angle Class II and Angle Class III malocclusion. Each group was classified as mild, moderate or severe according to the amount of existing crowding. The WKG was determined as the distance measured between the mucogingival junction and the free gingival margin; whereas GT was determined by the transgingival probing technique. Factorial variance analysis and Duncan multiple comparison test were used to identify whether there was a difference according to Angle classification and the amount of crowding in terms of these parameters.
RESULTS: It was found that teeth in the mandibular anterior region had a thin biotype. WKG and GT were highest for the mandibular incisor teeth in the severe crowding group and at the mandibular canine teeth in the mild crowding group. The relationship of WKG and mean GT of the mandibular anterior region with Angle classification was not found to be statistically significant. The GT of teeth 41 and 42 were found to be lower in the Angle Class III group.
CONCLUSION: When the amount of crowding increased it was observed that the WKG and GT of the central and lateral incisors were increased while the WKD and GT of the canines were decreased.