Three-dimensional analysis of dentolabial relationships: effect of age and sex in healthy dentition

International Journal of Oral and Maxillofacial Surgery
Riccardo RosatiChiarella Sforza

Abstract

Morphological changes in three-dimensional (3D) dentolabial relationships during ageing were assessed in healthy individuals. 38 subjects with healthy dentition were analysed. They were divided into a youthful group (21-34 years, mean 26 years, SD 4) and an older group (45-65 years, mean 53 years, SD 5). Stone labial and dental models were made, digitized and 3D virtual reproductions of dentolabial morphology were obtained. From the digital reconstructions, the relative positions of the labial commissure and of the maxillary dental clinical crowns in the vertical direction were obtained. Sex and age effects were compared using two-way analysis of variance. Lip position relative to the teeth was significantly different in youthful and older subjects (P<0.01). No statistically significant effects of sex in dentolabial relationship were demonstrated, but a sex×age effect was found in the anterior labial segments (P<0.05). The perioral soft tissues drop down in older subjects and the soft tissue descends on the entire labial arch. These differences may help the clinician when estimating, planning and evaluating surgical, orthodontic and prosthetic treatments.

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Citations

Feb 6, 2014·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Riccardo RosatiChiarella Sforza
Oct 22, 2013·Aesthetic Plastic Surgery·Riccardo RosatiChiarella Sforza
Nov 28, 2013·Aesthetic Plastic Surgery·Chung-Chih YuChe-Yao Chang
Aug 26, 2021·Clinical and Experimental Dental Research·Naruto OtawaHirofumi Kido

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