TY - JOUR
T1 - Three-dimensional analysis of dentolabial relationships
T2 - Effect of age and sex in healthy dentition
AU - Rosati, R.
AU - De Menezes, M.
AU - Rossetti, A.
AU - Ferrario, V. F.
AU - Sforza, C.
PY - 2012/11
Y1 - 2012/11
N2 - 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.
AB - 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.
KW - Digital anthropometry
KW - Lips
KW - Three-dimensional
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U2 - 10.1016/j.ijom.2012.04.002
DO - 10.1016/j.ijom.2012.04.002
M3 - Article
C2 - 22571860
AN - SCOPUS:84867404533
VL - 41
SP - 1344
EP - 1349
JO - International Journal of Oral and Maxillofacial Surgery
JF - International Journal of Oral and Maxillofacial Surgery
SN - 0901-5027
IS - 11
ER -