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New regression equations for predicting human teeth sizes.

Paredes V, Tarazona B, Zamora N, Cibrian R, Gandia JL - Head Face Med (2015)

Bottom Line: Moyers tables can only be validly applied to a 75% percentile for the mandible in both, males and females, 85% in males and 90-92% in females.Equations for estimating the combined width of the unerupted canine and premolars were; Male: UCPM = 12.68 + 0.42 LI and LCPM = 11.71 + 0.44 LI.Female: UCPM = 12.06 + 0.43LI and LCPM = 10.71 + 0.46 LI.

View Article: PubMed Central - PubMed

Affiliation: Orthodontics Department, Faculty of Dentistry and Medicine, University of Valencia, Gasco Oliag nº1, 46010, Valencia, Spain. vanessa.paredes@uv.es.

ABSTRACT

Introduction: The aims of the study were; to evaluate the applicability of the Moyers and Tanaka-Johnston Methods to individuals with a Spanish ancestry, to propose new regression equations using the lower four permanent incisors as predictors for the sum of the widths of the lower permanent canine and premolars, and to compare the new data to those from other populations.

Methods: A total of 359 Spanish ancestry adolescents were selected. Their dental casts were measured using a 2D computerized system. Real teeth measurements were compared with those predicted using Moyers probability tables and Tanaka and Johnston equations, and standard regression equations were then developed.

Results: Results showed that Upper and Lower Canine and Premolar (UCPM, LCPM) predictions are quite different depending on the used method. Moyers tables can only be validly applied to a 75% percentile for the mandible in both, males and females, 85% in males and 90-92% in females.

Conclusions: Moyers predictions tend to underestimate UCPM and LCPM whereas Tanaka-Johnston predictions tend to overestimate them. Equations for estimating the combined width of the unerupted canine and premolars were; Male: UCPM = 12.68 + 0.42 LI and LCPM = 11.71 + 0.44 LI. Female: UCPM = 12.06 + 0.43LI and LCPM = 10.71 + 0.46 LI.

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Related in: MedlinePlus

UCPM y LCPM predictions for males and females respectively using the 50% Moyers method, the 85% Tanaka-Johnston method and the estimated regression line.
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Fig1: UCPM y LCPM predictions for males and females respectively using the 50% Moyers method, the 85% Tanaka-Johnston method and the estimated regression line.

Mentions: Finally, in Figure 1, predictions of the three methods are compared; estimated regression lines, Moyers tables at 50% and at 85%, and the Tanaka-Johnston Rule.Figure 1


New regression equations for predicting human teeth sizes.

Paredes V, Tarazona B, Zamora N, Cibrian R, Gandia JL - Head Face Med (2015)

UCPM y LCPM predictions for males and females respectively using the 50% Moyers method, the 85% Tanaka-Johnston method and the estimated regression line.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4389662&req=5

Fig1: UCPM y LCPM predictions for males and females respectively using the 50% Moyers method, the 85% Tanaka-Johnston method and the estimated regression line.
Mentions: Finally, in Figure 1, predictions of the three methods are compared; estimated regression lines, Moyers tables at 50% and at 85%, and the Tanaka-Johnston Rule.Figure 1

Bottom Line: Moyers tables can only be validly applied to a 75% percentile for the mandible in both, males and females, 85% in males and 90-92% in females.Equations for estimating the combined width of the unerupted canine and premolars were; Male: UCPM = 12.68 + 0.42 LI and LCPM = 11.71 + 0.44 LI.Female: UCPM = 12.06 + 0.43LI and LCPM = 10.71 + 0.46 LI.

View Article: PubMed Central - PubMed

Affiliation: Orthodontics Department, Faculty of Dentistry and Medicine, University of Valencia, Gasco Oliag nº1, 46010, Valencia, Spain. vanessa.paredes@uv.es.

ABSTRACT

Introduction: The aims of the study were; to evaluate the applicability of the Moyers and Tanaka-Johnston Methods to individuals with a Spanish ancestry, to propose new regression equations using the lower four permanent incisors as predictors for the sum of the widths of the lower permanent canine and premolars, and to compare the new data to those from other populations.

Methods: A total of 359 Spanish ancestry adolescents were selected. Their dental casts were measured using a 2D computerized system. Real teeth measurements were compared with those predicted using Moyers probability tables and Tanaka and Johnston equations, and standard regression equations were then developed.

Results: Results showed that Upper and Lower Canine and Premolar (UCPM, LCPM) predictions are quite different depending on the used method. Moyers tables can only be validly applied to a 75% percentile for the mandible in both, males and females, 85% in males and 90-92% in females.

Conclusions: Moyers predictions tend to underestimate UCPM and LCPM whereas Tanaka-Johnston predictions tend to overestimate them. Equations for estimating the combined width of the unerupted canine and premolars were; Male: UCPM = 12.68 + 0.42 LI and LCPM = 11.71 + 0.44 LI. Female: UCPM = 12.06 + 0.43LI and LCPM = 10.71 + 0.46 LI.

Show MeSH
Related in: MedlinePlus