VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA ...
Transcript of VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA ...
359Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA DE MOYERS Y TANAKA-JOHNSTON, EN LA PREDICCIÓN DEL DIÁMETRO
MESIODISTAL DE CANINOS Y PREMOLARES NO ERUPCIONADOS1
ASSESSMENT OF MOYERS AND TANAKA-JOHNSTON MIXED DENTITION ANALYSES FOR THE PREDICTION OF MESIODISTAL DIAMETERS OF
UNERUPTED CANINES AND PREMOLARS
PAOLA MARÍA BOTERO2, DIANA P. CUESTA3, SANDRA AGUDELO4, CATALINA HINCAPIÉ4 CAROLINA RAMÍREZ4
RESUMEN. Introducción: el objetivo de esta investigación fue valorar si los métodos de Moyers(M) percentil (p) 75, p85, p95 y Tanaka-Johnston(TJ), usados para predecir el diámetro mesiodistal de caninos y premolares no erupcionados, sobreestiman o subestiman el diámetro de sus respectivos sucedáneos. Métodos: estudio de evaluación tecnológica diagnóstica en 56 modelos de yeso de escolares de Medellín, clase I esquelética, incisivos, caninos y bicúspides permanentes erupcionados, seguidos desde 6 a 12 años de edad. Se midió el diámetro mesiodistal de los dientes y se aplicaron los métodos predictivos de Tanaka-Johnston, Moyers p75, p85, p95. Se comparó el valor predicho y el real, utilizando la SUXHED�W�6WXGHQW�UHODFLRQDGD�\�OD�GH�:LOFR[RQ��/D�UHSURGXFLELOLGDG�GH�ORV�PpWRGRV�VH�FDOFXOy�FRQ�ORV�FRH¿FLHQWH�GH�FRUUHODFLyQ�LQWUDFODVH��&&,���,&������\�HO�QLYHO��GH�DFXHUGR�FRQ�ORV�OtPLWHV�%ODQG�\�$OWPDQ�DO������Resultados:�HQ�HO�DUFR�VXSHULRU�VH�REVHUYDURQ�GLIHUHQFLDV�VLJQL¿FDWLYDV�con el valor real en las mediciones de T-J y Mp95. En arco inferior todos los métodos fueron diferentes del valor real (p > 0,05), excepto Mp75. La reproducibilidad fue mayor en arco superior con T-J, seguido de Mp85; en el arco inferior el método de Mp75 tuvo mejor reproducibilidad, seguido GH�0S����(Q�DUFR�VXSHULRU�VH�HQFRQWUy�TXH�7�-�VREUHHVWLPD�OD�PHGLFLyQ�UHDO�HQ�SURPHGLR�������PP��,&������������������\�HQ�HO�DUFR�LQIHULRU�0S���VREUHHVWLPD�HQ�������,&�������������������Conclusión: el mejor método predictivo para el arco superior es el de Tanaka-Johnston, y para el arco inferior es el de Moyers al percentil 75, aunque ambos sobreestiman el valor real, presentan adecuada reproducibilidad.
Palabras clave: predicción; reproduciblidad; diente no erupcionado.
Botero PM, Cuesta DP, Agudelo S, Hincapié C, Ramírez C. Valoración de los métodos de análisis de dentición mixta de Moyers y Tanaka-Johnston en la predicción del diámetro mesiodistal de caninos y premolares no erupcionados. Rev Fac Odontol Univ Antioq 2014; 25(2):359-371.
RECIBIDO: ENERO 22/2013-ACEPTADO: OCTUBRE 22/2013
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ABSTRACT. Introduction: the objective of this study was to determine whether the methods of Moyers (M) percentile (p) 75, p85, p95 and Tanaka-Johnston (TJ), used in the prediction of the mesiodistal diameter of unerupted canines and premolars, either overestimate or underestimate their respective succedaneous diameter. Methods: diagnostic technology assessment in 56 plaster models of schoolchildren from Medellin, with class I skeletal and permanent erupted incisors, canines, and bicuspids, with follow-ups from 6 to 12 years of age. The teeth mesiodistal diameter was measured by the predictive methods of Tanaka-Johnston and Moyers p75, p85, p95. The predicted and actual values were evaluated by means RI�UHODWHG�6WXGHQW¶V�W�WHVW�DQG�:LOFR[RQ�WHVW��7KHVH�PHWKRGV¶�UHSURGXFLELOLW\�ZDV�FDOFXODWHG�E\�LQWUDFODVV�FRUUHODWLRQ�FRHI¿FLHQW��,&&�������&,���DQG� WKHLU� OHYHO�ZDV�FDOFXODWHG�XVLQJ�%ODQG�$OWPDQ����� OLPLWV��Results:� LQ� WKH�XSSHU�DUFK�� VLJQL¿FDQW�DFWXDO� YDOXH�GLIIHUHQFHV�ZHUH�REVHUYHG�with the T-J and Mp95 measurements. In the lower arch, the values of all the methods were different to the actual value (p > 0.05), except Mp75. Reproducibility was higher in the upper arch with T-J, followed by Mp85; in the lower arch, Mp75 was the method with the best reproducibility, IROORZHG�E\�0S����,Q�WKH�XSSHU�DUFK��7�-�RYHUHVWLPDWHV�WKH�DFWXDO�PHDVXUHPHQW�E\�������PP�LQ�DYHUDJH������&,���������������DQG�LQ�WKH�ORZHU�DUFK�0S���RYHUHVWLPDWHV�E\�����������&,���������������Conclusion: the best predictive method for the upper arch is Tanaka-Johnston, and for the lower arch, Moyers at the 75th percentile; although both methods overestimate the actual value, they show adequate reproducibility.
Key words: prediction; reproducibility, unerupted tooth.
Botero PM, Cuesta DP, Agudelo S, Hincapié C, Ramírez C. Assessment of Moyers and Tanaka-Johnston mixed dentition analyses for the prediction of mesiodistal diameters of unerupted canines and premolars. Rev Fac Odontol Univ Antioq 2014; 25 (2):359-371.
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SUMBITTED: JANUARY 22/2013-ACCEPTED: OCTOBER 22/2013
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VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA DE MOYERS Y TANAKA-JOHNSTON, EN LA PREDICCIÓN DEL DIÁMETRO MESIODISTAL DE CANINOS Y PREMOLARES NO ERUPCIONADOS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
INTRODUCCIÓN
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INTRODUCTION
Dental crowding is one of the most frequent
problems in the general population. It is described
as the discrepancy between tooth size and arch
perimeter.1 This discrepancy is characterized by a
lack of coincidence in the anatomical interproximal
contact points of erupted teeth, by teeth being unable
to erupt, or by doing so in an ectopic manner.1
Adequate diagnosis of dentoalveolar discrepancy
and early treatment are pivotal in preventing occlusal
alterations that complicate future treatments in
permanent dentition. Besides clinical analysis,
patients with mixed dentition require model
analysis as part of the necessary data to establish a
diagnosis. The method of mixed dentition analysis
predicts the mesiodistal size of permanent canines
and premolars and is a diagnostic tool that allows
to quantify crowding and to predict dentoalveolar
discrepancy by identifying the available and
necessary space for teeth not yet erupted.2
There are several prediction methods based
on models, x-rays, and a combination of both.
Radiographic methods based on lateral periapical
and 45° cephalic x-rays are the most accurate3-5 but
they require more time and special equipment and
are therefore less practical.6, 7 On the contrary, non-
radiographic methods are based on correlations and
linear regression equations with prediction tables.8, 9
The accuracy of these methods has been questioned
when applied to racial or ethnic groups other than
the population in which they originated.2, 3, 10, 11
Moyers analysis,10 a non-radiographic method,
uses mesiodistal diameter of four permanent
lower incisors, measured in plaster models,
and a prediction table for non-erupted canines and
premolars, with percentiles ranging from 50 to 95 for
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ASSESSMENT OF MOYERS AND TANAKA-JOHNSTON MIXED DENTITION ANALYSES FOR THE PREDICTION OF MESIODISTAL DIAMETERS OF UNERUPTED CANINES AND PREMOLARS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
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American children. Percentile 75 is recommended
when applying the analysis in different populations,
while percentiles 85 and 95 may overestimate the
actual value, since they have more accurate ranges.11,
12 On the other hand, the Tanaka-Johnston analysis7
uses the same reference from the four permanent
incisors but establishes a constant and a formula
based on a predictive model of an equation to be
applied on each arch.
Recognizing the estimation error of each method,
as well as biological and environmental factors
associated with the impact of the various socio-
cultural customs, inevitably decreases the
theoretical accuracy of Moyers and Tanaka-
Johnston prediction methods in Colombian
populations.13-15 Several authors have conducted
studies to compare prediction methods and
actual results in different populations, in order to
determine if the methods really work and which
the most accurate is.8, 16-22 Some of these studies
have shown, for example, that the Tanaka-Johnston
method underestimates actual tooth size, while the
Moyers method can be effectively used in different
percentiles for both sexes, with a certain degree of
overestimation.
6HYHUDO� VWXGLHV� KDYH� VKRZQ� FRHI¿FLHQWV� RI�correlation differences among diverse ethnic
groups,10, 22 with results ranging from –0.01 to
3 mm.16, 17, 19, 23, 24 Clinically, overestimation in each
arch may generate serial extractions in patients
ZLWK�VNHOHWDO�FODVV�,��DGHTXDWH�SUR¿OH�DQG�PRGHUDWH�crowding (4 to 7 mm).17, 22 Finally, the combination
of both methods has been proven to be more
accurate.5, 13, 18
The objective of this study is to determine whether
the methods of Tanaka-Johnston and Moyers,
applying the 75, 85 and 95 percentiles to predict
the mesiodistal diameter of unerupted canines and
premolars, either overestimate or underestimate the
diameter of their respective succedaneous.
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VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA DE MOYERS Y TANAKA-JOHNSTON, EN LA PREDICCIÓN DEL DIÁMETRO MESIODISTAL DE CANINOS Y PREMOLARES NO ERUPCIONADOS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
MÉTODOS
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(Q�HVWRV�PRGHORV��VH�WRPDURQ�ODV�PHGLGDV�GHO�GLiPHWUR�PHVLRGLVWDO�GHO�FDQLQR�VXSHULRU��SULPHU�SUHPRODU�VXSH-ULRU��VHJXQGR�SUHPRODU�VXSHULRU��LQFLVLYR�FHQWUDO�LQIHULRU��LQFLVLYR� ODWHUDO� LQIHULRU�� FDQLQR� LQIHULRU�� SULPHU� SUHPR-ODU�LQIHULRU�\�VHJXQGR�SUHPRODU�LQIHULRU��HQ�HO�SXQWR�GH�Pi[LPR�GLiPHWUR�PHVLRGLVWDO��XWLOL]DQGR�XQ�PLFURVFR-SLR�HOHFWUyQLFR�GLJLWDO�FRQ�XQD�SUHFLVLyQ�GH������PP��/HLW]��$OHPDQLD���HQ�HO�ODERUDWRULR�GH�PHWURORJtD�GH�OD�8QLYHUVLGDG�($),7�HQ�0HGHOOtQ��&RORPELD��GH�DFXHUGR�FRQ�HO�VLVWHPD�LQWHUQDFLRQDO�GH�XQLGDGHV��6,���6H�UHD-OL]DURQ� WUHV� UpSOLFDV�SRU�PHGLFLyQ�SDUD�SURSRUFLRQDUOH�YDOLGH]�DO�HVWXGLR��\�VH�XWLOL]y�HO�SURPHGLR�GH�ODV�WUHV��
METHODS
This was a diagnostic technology assessment on 139
schoolchildren from Medellin, presenting skeletal
class I, with permanent incisors and erupted canines
and bicuspids. The students were monitored since
they were 6 until the age of 12 years by another
study conducted at Universidad de Antioquia, for
which a signed informed consent was obtained from
each participant.21 The patients’ models were made
annually (by a single operator, with a standardized
technique, using an irreversible hydrocolloid and
plaster stone type III, according to the manufacturer’s
instructions). Patients participated in promotion,
prevention, and restorative procedures to help them
remain healthy, and were not subjected to orthodontic
treatment during the time of the study.21
A convenience sample of 56 kids (112 pairs of
models, 2 pairs per patient) was chosen from
the group of 139 schoolchildren, as they met the
following inclusion criteria: good plaster model
conditions, absence of air bubbles or broken teeth,
WKH�¿UVW�PRGHO��REWDLQHG�IURP�HDFK�SDWLHQW�DW�LQLWLDO��mixed, or intertransitional dentition stages, should
have at least two central and one lower lateral
incisor fully erupted, and for the second model the
patient should be in the early permanent dentition
stage, with canines and bicuspids fully erupted in
one of the two sides of each arch (upper and lower).
Models were used to measure the mesiodistal
GLDPHWHU�RI� WKH�IROORZLQJ� WHHWK��XSSHU�FDQLQH��¿UVW�upper premolar, second upper premolar, lower central
LQFLVRU��ORZHU�ODWHUDO�LQFLVRU��ORZHU�FDQLQH��¿UVW�ORZHU�premolar, and second lower premolar, at the point
of maximum mesiodistal diameter, using a digital
electron microscope with an accuracy of 0.001 mm
(Leitz, Germany) at Universidad EAFIT metrology
laboratory (Medellín, Colombia), according to the
international system of units (SI). Three replicates
363
ASSESSMENT OF MOYERS AND TANAKA-JOHNSTON MIXED DENTITION ANALYSES FOR THE PREDICTION OF MESIODISTAL DIAMETERS OF UNERUPTED CANINES AND PREMOLARS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
/DV�PHGLFLRQHV�IXHURQ�UHDOL]DGDV�SRU�XQ�VROR�RSHUDGRU�
H[SHUWR�HVWDQGDUL]DGR��6ROR�VH�PLGLHURQ�ORV�GLHQWHV�GHO�
ODGR�GHUHFKR�GH�FDGD�DUFR�\�VX�PHGLGD�GXSOLFDGD�SDUD�
DPERV�ODGRV��GHELGR�D�TXH�HVWXGLRV�SUHYLRV�PXHVWUDQ�
TXH�QR�H[LVWHQ�GLIHUHQFLDV��HVWDGtVWLFDPHQWH�VLJQLÀFD-
WLYDV��HQWUH�HO� WDPDxR�GHQWDO�GHO� ODGR�GHUHFKR�\�HO� L]-
TXLHUGR��HQ�XQ�PLVPR�SDFLHQWH�������
3RVWHULRUPHQWH�VH�OOHYy�D�FDER�OD�SUHGLFFLyQ�GH�FDQLQRV�\� ELF~VSLGHV�� DSOLFDQGR� ORV� DQiOLVLV� GH� 7DQDND�-RKQVWRQ�\� 0R\HUV�� FRQ� SHUFHQWLO� ���� ���� ���� FRQ� EDVH� HQ� ODV�PHGLFLRQHV� REWHQLGDV� GHO� SULPHU� PRGHOR� GH� FDGD�SDFLHQWH��\�FXPSOLHQGR�SDVR�D�SDVR�OR�VXJHULGR�SRU�ORV�DXWRUHV�GH�GLFKR�DQiOLVLV�����
Análisis estadístico
6H�KL]R�XQ�DQiOLVLV�XQLYDULDGR�SDUD�GHVFULELU�ODV�PHGLGDV�GH�IUHFXHQFLD�GH�ORV�YDORUHV�UHDOHV�\�SUHGLFKRV��\�VX�YD-ULDFLyQ�FRQ�OD�DSOLFDFLyQ�GHO�PpWRGR�GH�0R\HUV��SHUFHQ-WLOHV��������\�����\�GH�7DQDND�-RKQVWRQ�
6H�DSOLFy�OD�SUXHED�GH�.ROPRJRURY�6PLUQRY�FRQ�FRUUHF-FLyQ�GH�/LOOLHIRUV��SDUD�HYDOXDU�OD�GLVWULEXFLyQ�QRUPDO�GH�ODV�YDULDEOHV�FRQWLQXDV��6H�UHDOL]y�XQ�DQiOLVLV�ELYDULDGR�SDUD�FRPSDUDU�HO�YDORU�SUHGLFKR�\�HO�UHDO�FRQ�FDGD�Pp-WRGR��XWLOL]DQGR� OD�SUXHED�GH�W�6WXGHQW�UHODFLRQDGD�R� OD�SUXHED�GH�:LOFR[RQ��VHJ~Q�OD�GLVWULEXFLyQ�GH�OD�YDULDEOH�
6H�FDOFXOy�HO�FRHÀFLHQWH�GH�FRUUHODFLyQ�LQWUDFODVH�&&,�\�VX�LQWHUYDOR�GH�FRQÀDQ]D�GH�����SDUD�HYDOXDU�OD�UHSURGXFLEL-OLGDG��DVt�FRPR�HO�&RHÀFLHQWH�GH�/LQ��FRQFRUGDQFLD��HQWUH�FDGD�XQR�GH�ORV�PpWRGRV�SUHGLFWLYRV��7DQDND�-RKQVWRQ�\�0R\HUV��\�HO�YDORU�UHDO�PHGLGR�HQ�GHQWLFLyQ�SHUPDQHQWH��(O�PDUJHQ�GH�DFXHUGR�HQWUH�ORV�PpWRGRV�VH�GHWHUPLQy�FRQ�ORV� OtPLWHV�GHO�����%ODQG�\�$OWPDQ�26�3DUD� LQWHUSUHWDU� OD�UHSURGXFLELOLGDG��VH�XWLOL]y�HO�FULWHULR�GH�$OWPDQ��DVt��SREUH�����������DFHSWDEOH��������������PRGHUDGD�������\��������EXHQD��HQWUH������\�������\�H[FHOHQWH�FXDQGR�HUDQ�YDORUHV�PD\RUHV�D������\�KDVWD���������/RV�YDORUHV�QHJDWLYRV�IXH-URQ�LQWHUSUHWDGRV�FRPR�LJXDOHV�D������(O�software�67$7$�Y�����IXH�XWLOL]DGR�SDUD�HO�DQiOLVLV�HVWDGtVWLFR�
per measurement were performed in order to
provide validity to the study, and the average of the
three measures was used. The measurements were
performed by a single standardized skilled operator.
Only the teeth on the right side of each arch were
measured and their values were duplicated for both
sides, since previous studies have shown that there
DUH�QR�VLJQL¿FDQW�VWDWLVWLFDO�GLIIHUHQFHV�LQ� WHUPV�RI�size of the right and left sides in the same patient.20, 25
Prediction of canines and bicuspids was performed
by means of the analyses of Tanaka-Johnston and
Moyers, with 75, 85, 95 percentile, based on the
PHDVXUHPHQWV�REWDLQHG�IURP�WKH�¿UVW�PRGHO�RI�HDFK�patient, carefully following the steps suggested by
the creators of each method.7, 9
Statistical analysis
Univariate analysis was conducted in order to
describe the measures of frequency of predicted
and actual values and their variation after applying
the methods of Moyers (75, 85 and 95 percentiles)
and Tanaka-Johnston.
The Kolmogorov-Smirnov test with Lilliefors’
correction was used to evaluate the normal
distribution of continuous variables. A bivariate
analysis was performed to compare predicted and
actual values with each method, using the related
Student’s t test or Wilcoxon test, according to the
distribution of the variable.
,QWUDFODVV� FRUUHODWLRQ� FRHI¿FLHQW� �,&&�� DQG� LWV�FRQ¿GHQFH�LQWHUYDO�RI�����ZHUH�FDOFXODWHG�LQ�RUGHU�WR� DVVHVV� UHSURGXFLELOLW\�� DQG� /LQ¶V� FRHI¿FLHQW�(concordance) was also calculated between each of the predictive methods (Tanaka-Johnston and Moyers) and the actual value in permanent dentition. The limit of agreement between the methods ZDV� FDOFXODWHG� ZLWK� %ODQG�$OWPDQ� ���� OLPLWV�26
To interpret reproducibility, Altman’s criterion ZDV� XVHG� DV� IROORZV�� SRRU� ��� ������� DFFHSWDEOH� (0.21-0.40), moderate (0.41 and 0.60), good (between 0.61 and 0.80), and excellent values were those higher than 0.80 up to 1.00.27 Negative values were those equal to 0.0. The STATA v.9.0 software was used for statistical analysis.
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VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA DE MOYERS Y TANAKA-JOHNSTON, EN LA PREDICCIÓN DEL DIÁMETRO MESIODISTAL DE CANINOS Y PREMOLARES NO ERUPCIONADOS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
RESULTADOS
'H�ORV����PRGHORV�VHOHFFLRQDGRV�����HUDQ�GH�SDFLHQWHV�GH�VH[R�IHPHQLQR�������\����GH�VH[R�PDVFXOLQR��������$O�FRPSDUDU� ORV�YDORUHV�GH�SUHGLFFLyQ�FRQ�HO�YDORU�UHDO�GH�ORV�GLHQWHV�SHUPDQHQWHV�SDUD�HO�DUFR�VXSHULRU��VH�HQ-FRQWUDURQ�GLIHUHQFLDV�HVWDGtVWLFDPHQWH�VLJQLÀFDWLYDV�HQ�OD�SUHGLFFLyQ�GH�0R\HUV�S����YDORU�S� ��������PDJQLWXG�GH� OD�GLIHUHQFLD���������������\�SDUD�7DQDND�-RKQVWRQ��YDORU� S� � ������� PDJQLWXG� GH� OD� GLIHUHQFLD�� ��������������0LHQWUDV�TXH�HQ�HO�DUFR�LQIHULRU�QLQJ~Q�PpWRGR��FRQ�H[FHSFLyQ�DO�GH�0R\HUV�S����S� ��������PDJQLWXG�GH�OD�GLIHUHQFLD����������������PRVWUy�GLIHUHQFLDV�HVWD-GtVWLFDPHQWH�VLJQLÀFDWLYDV��WDEOD����
RESULTS
Of the 56 chosen models, 39 were of female patients
������DQG����RI�PDOH�SDWLHQWV� ������� ,Q�FRPSDULQJ�prediction values and actual values of permanent teeth in
WKH�XSSHU�DUFK��VWDWLVWLFDOO\�VLJQL¿FDQW�GLIIHUHQFHV�ZHUH�found in Moyers p95 prediction (p = 0.004, magnitude
of difference: 22.10-23.10) and Tanaka-Johnston
prediction (p = 0.008, magnitude of difference: 21.99-
22.97). In terms of the lower arch, no method showed
VWDWLVWLFDOO\�VLJQL¿FDQW�GLIIHUHQFHV��ZLWK�WKH�H[FHSWLRQ�of Moyers p75 (p = 0.090, magnitude of difference:
21.00-22.30) (table 1).
Tabla 1. Descripción de las mediciones de los dientes según diferentes métodos de predicción
MétodoArco superior Arco inferior
Promedio (D. E.) Mediana (RIQ) T Student Valor P Promedio (D. E.) Mediana (RIQ) T Student Valor P
7DQDND�-RKQVWRQ������������� ������ ����� ������ ����� �������
������������� ������� �������������
0R\HUV�S��������� ����� ����� ������� ����� �����
������� ������������� ������� �������������
0R\HUV�S��������� ����� ����� ������� ����� ������
������� �������������� ������� �������������
0R\HUV�S��������� ����� ����� ������� ����� ������
������� �������������� ������� �������������
9DORU�UHDO������� ����� - ������ ����� -
������� ������������� ������� �������������
'LVWULEXFLyQ�QR�QRUPDO� :LOFR[RQ�WHVW
Table 1. Description of teeth measurements according to different prediction methods
MethodUpper arch Lower arch
Average (S. D.) Median (RIQ) Student’s t p value Average (S. D.) Median (RIQ) Student’s t p value
7DQDND�-RKQVWRQ�������������� ������ ����� ������ ����� ��������
������������� ������� �������������
0R\HUV�S��������� ����� ������ ������� ����� �����
������� �������������� ������� �������������
0R\HUV�S��������� ����� ������ ������� ����� �������
������� �������������� ������� �������������
0R\HUV�S��������� ����� ������ ������� ����� �������
������� �������������� ������� �������������
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������� ������������� ������ �������������
�1RQ�QRUPDO�GLVWULEXWLRQ� �:LOFR[RQ�WHVW
365
ASSESSMENT OF MOYERS AND TANAKA-JOHNSTON MIXED DENTITION ANALYSES FOR THE PREDICTION OF MESIODISTAL DIAMETERS OF UNERUPTED CANINES AND PREMOLARS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
(O�PpWRGR�GH�7DQDND�-RKQVWRQ�PRVWUy�PD\RU�UHSURGXFL-ELOLGDG�HQ�HO�PD[LODU��FRQ�XQ�&&,�GH��������,&�������������������VHJXLGR�GH�0R\HUV�S����FRQ�XQ�&&,�GH��������,&�������������������WDEOD�����(O�SRUFHQWDMH�GH�FRQFRU-GDQFLD�IXH�UHDOL]DGR�XVDQGR�HO�FRHÀFLHQWH�GH�/LQ��VLHQ-GR�PD\RU�SDUD�7DQDND�-RKQVWRQ���������\�0R\HUV�S������������/D�PD\RU�UHSURGXFLELOLGDG��HQWUH�HO�YDORU�UHDO�\�HO�YDORU�SUHGLFKR��IXH�HQ�HO�DUFR�LQIHULRU�SDUD�0R\HUV�S����&&,� � ������� ,&���� ������������� SRUFHQWDMH� /LQ� ������\�0R\HUV�S����&&,� ��������,&������������������SRUFHQWDMH�/LQ� ��������WDEOD����
(O�PpWRGR�GH�0R\HUV�VXEHVWLPD�HO�YDORU�UHDO��FRQ�XQD�GLIHUHQFLD� GH� ������PP�\� ������PP�SDUD� S��� HQ� HO�DUFR� VXSHULRU�� 3RU� HO� FRQWUDULR�� 7DQDND�-RKQVWRQ� \�0R\HUV�S���VREUHVWLPDQ�HO�YDORU�UHDO��FRQ�GLIHUHQFLDV�GH��������PP�\��������PP�UHVSHFWLYDPHQWH��
The Tanaka-Johnston method showed greater
reproducibility in the maxillary, with an ICC of 0,611
����� &,� ������� �������� IROORZHG� E\� 0R\HUV� S����ZLWK�DQ�,&&�RI������������&,����������������WDEOH�2). The percentage of concordance was calculated
XVLQJ�/LQ¶V�FRHI¿FLHQW��ZLWK�KLJKHU�YDOXHV�IRU�7DQDND�-RKQVWRQ� �������� DQG� 0R\HUV� S��� ��������� 7KH�highest reproducibility between the actual value and
the predicted value occurred in the lower arch using
0R\HUV�S����,&&� ������������&,��������������/LQ¶V�SHUFHQWDJH� �����DQG�0R\HUV�S����,&&� ������������CI 0.185-0.760, Lin’s percentage = 55.4) (table 2).
Moyers method underestimates the actual value, with
a difference of 0.576 mm and 0.238 mm for p85 in
the upper arch. On the contrary, Tanaka-Johnston
and Moyers p95 overestimate the actual value, with
differences of –0.333 mm and –0.379 mm respectively.
Tabla 2.�&RHÀFLHQWHV�GH�FRUUHODFLyQ�LQWUDFODVH�\�OtPLWHV�GH�DFXHUGR�GHO�����GH�OD�GLIHUHQFLD��HQWUH�HO�WDPDxR�UHDO�HUXSFLRQDGR�\�HO�YDORU�GH�OD�SUHGLFFLyQ�GHO�WDPDxR�
GH�ORV�GLHQWHV�FDQLQRV�\�SUHPRODUHV�QR�HUXSFLRQDGRV
Método CCI21 (IC95%) &RHÀFLHQWH�GH�/LQ Diferencia promedio (D,S) Límites de acuerdo del 95% Bland y Altman
Arco superior
7DQDND�-RKQVWRQ �������������������� ����� �������������� �������������
0R\HUV�S�� �������������������� ����� �������������� �������������
0R\HUV�S�� �������������������� ����� �������������� �������������
0R\HUV�S�� �������������������� ����� �������������� �������������
Arco inferior
7DQDND�-RKQVWRQ �������������������� ����� �������������� �������������
0R\HUV�S�� �������������������� ����� �������������� �������������
0R\HUV�S�� �������������������� ����� �������������� �������������
0R\HUV�S�� �������������������� ����� �������������� �������������
Table 2.�,QWUDFODVV�FRUUHODWLRQ�FRHI¿FLHQWV�DQG�����OLPLWV�RI�DJUHHPHQW�RI�WKH�GLIIHUHQFH�EHWZHHQ�WKH�DFWXDO�HUXSWHG�VL]H�DQG�WKH�SUHGLFWHG�YDOXH�
RI�WKH�VL]H�RI�QRQ�HUXSWHG�FDQLQHV�DQG�SUHPRODUV
Method ICC 21 (95% CI) /LQ·V�&RHIÀFLHQW Mean difference (S. D.) Bland-Altman 95% limits of agreement
Upper arch
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0R\HUV�S�� �������������������� ����� ������������� ²������������
0R\HUV�S�� �������������������� ����� ������������� ²������������
0R\HUV�S�� �������������������� ����� ²������������� ²������������
Lower arch
7DQDND�-RKQVWRQ �������������������� ����� ²������������� ²������������
0R\HUV�S�� �������������������� ����� ²������������� ²������������
0R\HUV�S�� �������������������� ����� ²������������� ²������������
0R\HUV�S�� �������������������� ����� ²������������� ²������������
366
VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA DE MOYERS Y TANAKA-JOHNSTON, EN LA PREDICCIÓN DEL DIÁMETRO MESIODISTAL DE CANINOS Y PREMOLARES NO ERUPCIONADOS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
3DUD�HO� DUFR� LQIHULRU�� DPERV�PpWRGRV�VREUHVWLPDURQ�HO�YDORU� UHDO� GH� ORV� GLHQWHV� SHUPDQHQWHV�� GRQGH� 7DQDND��-RKQVWRQ�PRVWUy�OD�PD\RU�FDQWLGDG�GH�VREUHVWLPDFLyQ��FRQ�XQD�GLIHUHQFLD�HQ�WDPDxR�GHQWDO�GH��������PP��VH-JXLGR�SRU�0R\HUV�S����FRQ�XQD�GLIHUHQFLD�SURPHGLR�GH��������PP��WDEOD����
&XDQGR�HO�YDORU�SUHGLFKR�HQ�HO�PD[LODU�REWHQLGR�PHGLDQ-WH�HO�PpWRGR�GH�7DQDND�-RKQVWRQ�HV�FHUFDQR�D����PP��VH�FRQVLGHUD�TXH�H[LVWH�XQD�SHUIHFWD�FRQFRUGDQFLD�FRQ�HO� YDORU� UHDO�� 6L� HO� YDORU� SUHGLFKR� HVWi� SRU� HQFLPD� GH� ���PP��VH�FRQVLGHUD�TXH�HO�PpWRGR�VREUHHVWLPD�HO�YD-ORU�UHDO��SRU�HO�FRQWUDULR��VL�HO�YDORU�HV�PHQRU��VH�HVWD-EOHFH�XQD�VXEHVWLPDFLyQ��ÀJXUD�����0R\HUV�S���PXHV-WUD�XQD� WHQGHQFLD�VLPLODU��FXDQGR�HO�YDORU�SUHGLFKR�HV����PP�SDUD�OD�PDQGtEXOD��ÀJXUD����
Figura 1. 'LIHUHQFLD�GH�ODV�PHGLFLRQHV�GH�7DQDND�-RKQVWRQ�UHVSHFWR�DO�DFXHUGR�
SHUIHFWR�GH������HQ�DUFR�VXSHULRU
Figura 2. 'LIHUHQFLD�GH�ODV�PHGLFLRQHV�GH�0R\HUV�S���UHVSHFWR�DO�DFXHUGR�SHU-
IHFWR�GH������HQ�DUFR�LQIHULRU
In the lower arch, both methods overestimated the
actual value of permanent teeth, and Tanaka-Johnston
showed the greatest amount of overestimation, with
a difference in tooth size of –0.652 mm, followed by
Moyers p85, with an average difference of –0.645
mm (table 2).
When the predicted value obtained in the maxilla
using the Tanaka-Johnston method is close to 23
mm, there is perfect concordance with the actual
value. If the predicted value is above 23 mm,
the method is considered to overestimate the
DFWXDO� YDOXH�� E\� FRQWUDVW�� LI� WKH� YDOXH� LV� ORZHU��XQGHUHVWLPDWLRQ� LV� FRQVLGHUHG� �¿JXUH� ����0R\HUV�p75 shows a similar tendency when the predicted
YDOXH�LV����PP�LQ�WKH�PDQGLEOH��¿JXUH����
Figure 1. 'LIIHUHQFH�RI�7DQDND�-RKQVWRQ�PHDVXUHPHQWV�LQ�UHODWLRQ�
WR�WKH�����SHUIHFW�DJUHHPHQW�LQ�WKH�XSSHU�DUFK�
Figure 2. 'LIIHUHQFH�RI�0R\HUV�S���PHDVXUHPHQWV�LQ�UHODWLRQ�WR�WKH�
����SHUIHFW�DJUHHPHQW�LQ�WKH�ORZHU�DUFK
367
ASSESSMENT OF MOYERS AND TANAKA-JOHNSTON MIXED DENTITION ANALYSES FOR THE PREDICTION OF MESIODISTAL DIAMETERS OF UNERUPTED CANINES AND PREMOLARS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
DISCUSIÓN
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(O�JUDGR�GH�VXEHVWLPDFLyQ�\�VREUHHVWLPDFLyQ�SXEOLFDGD�HQ�OD�OLWHUDWXUD�SXHGH�VHU�HVWDGtVWLFDPHQWH�VLJQLÀFDWLYD��SHUR�FOtQLFDPHQWH�LUUHOHYDQWH��6LQ�HPEDUJR��XQD�GLIHUHQ-FLD�GH���PP�SXHGH�VHU�FOtQLFDPHQWH�VLJQLÀFDWLYD�HQ�ORV�FDVRV�HQ�ORV�TXH�VH�GHEH�WRPDU� OD�GHFLVLyQ�GH�UHDOL]DU�XQD� H[WUDFFLyQ� VHULDGD� HQ� SDFLHQWHV� FRQ� DSLxDPLHQWR�PRGHUDGR�����������(Q�HO�SUHVHQWH�HVWXGLR��HO�PpWRGR�PiV�UHSURGXFLEOH�SDUD�HO�DUFR�VXSHULRU��PRVWUy�XQD�VREUHVWL-PDFLyQ�GH������PP�\�XQD�VXEHVWLPDFLyQ�GH������PP�SDUD�HO�ODGR�GHUHFKR��3DUD�HO�DUFR�LQIHULRU��HO�PpWRGR�FRQ�PD\RU�UHSURGXFLELOLGDG�PRVWUy�XQD�VREUHHVWLPDFLyQ�GH������PP�\�XQD�VXEHVWLPDFLyQ�GH������PP�SRU�ODGR�
(VWXGLRV� SUHYLRV�� TXH� KDQ� DSOLFDGR� ORV� PpWRGRV� GH�0R\HUV� \� 7DQDND�-RKQVWRQ� HQ� GLIHUHQWHV� SREODFLRQHV��KDQ�FRPSDUDGR�VXV�UHVXOWDGRV�XVDQGR�HO�FRHÀFLHQWH�GH�FRUUHODFLyQ�OLQHDO�GH�3HDUVRQ������������������\�VXV�UHVXOWDGRV�KDQ� GHWHUPLQDGR� HO� JUDGR� GH� DVRFLDFLyQ� HQWUH� GRV�YDULDEOHV� FXDQWLWDWLYDV� VLQ� GHÀQLU� OD� GHSHQGHQFLD� HQWUH�HOODV�� (VWH� PpWRGR� QR� HV� DGHFXDGR� SDUD� GHWHUPLQDU�
DISCUSSION
The results of this study show that Moyers
and Tanaka-Johnston mixed dentition analyses
overestimate the actual value of permanent teeth. The
best tooth size prediction method for the upper arch
is Tanaka-Johnston, while Moyers p75 is the best for
WKH�ORZHU�DUFK��HYHQ�WKRXJK�WKH\�RYHUHVWLPDWH�DFWXDO�values, they show high reproducibility (table 2).
Results of the original Tanaka-Johnston study show
that lower central incisors have a correlation of r2 =
0.625 for upper canines and premolars, and r2 = 0.648
for lower canines and premolars. These results agree
with those of Ballard and Willye (r2 = 0.64). Linear
FRUUHODWLRQ�FRHI¿FLHQWV��XVHG�WR�FRPSDUH�SUHGLFWLRQV�and actual values, only estimate the associations
between them but do not evaluate reproducibility. In
this study, correlations of r2 = 0.603 and r2 = 0.468
were obtained with the Tanaka-Johnston method
in the upper and lower arch, respectively. This
correlation is lower than that of the original study.7
The degree of underestimation and overestimation
UHSRUWHG�LQ�WKH�OLWHUDWXUH�PD\�EH�VWDWLVWLFDOO\�VLJQL¿FDQW�but clinically irrelevant. However, a difference of 2
PP� FDQ� EH� FOLQLFDOO\� VLJQL¿FDQW� LQ� FDVHV� LQ� ZKLFK�the decision for a serial extraction in patients with
moderate crowding extraction must be taken.17, 28 29
In the present study, the most reproducible method
for the upper arch showed an overestimation of 2.10
mm and an underestimation of 1.43 mm on the right
side. In the lower arch, the method with the highest
reproducibility showed 2.02 mm overestimation and
1.59 mm underestimation on each side.
Previous studies applying the methods of Moyers
and Tanaka-Johnston in different populations have
FRPSDUHG�WKHLU�UHVXOWV�E\�XVLQJ�3HDUVRQ¶V�FRHI¿FLHQW�of linear correlation6, 16, 20, 29-31 and their results have
determined the degree of association between two
TXDQWLWDWLYH�YDULDEOHV�ZLWKRXW�GH¿QLQJ�GHSHQGHQFH�between them. This method is not suitable to
368
VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA DE MOYERS Y TANAKA-JOHNSTON, EN LA PREDICCIÓN DEL DIÁMETRO MESIODISTAL DE CANINOS Y PREMOLARES NO ERUPCIONADOS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
UHSURGXFLELOLGDG�R� OD�FRUUHODFLyQ�HQWUH�PHGLGDV22�FRPR�ODV�UHDOL]DGDV�HQ�HO�SUHVHQWH�HVWXGLR�
([LVWHQ� GLIHUHQFLDV� HQWUH� ORV� LQVWUXPHQWRV� XVDGRV� SDUD�ODV�PHGLFLRQHV� GH� ORV� WDPDxRV� GHQWDOHV� HQ�PRGHORV� HQ�ORV� GLIHUHQWHV� HVWXGLRV� UHSRUWDGRV�� OR� TXH� KDFH� GLItFLO� OD�FRPSDUDFLyQ� HQWUH� HOORV�� 0R\HUV�� HQ� VX� LQYHVWLJDFLyQ�RULJLQDO�� HPSOHy� XQ� PLFURVFRSLR� ySWLFR� �2SWRFRP���� 7DQDND�-RKQVWRQ�HPSOHDURQ�XQ�FDOLEUDGRU�GH�YHUQLHU��FRQ�XQD�SUHFLVLyQ�GH������PP���%LVKDUD�HPSOHy�XQ�FRPSiV�GH�GREOH�SXQWD22�H�,QJHUYDOO�XQ�FDOLEUDGRU�GHVOD]DQWH�23�PLHQWUDV�RWURV�XVDURQ�FDOLEUDGRUHV�GLJLWDOHV�FRQ�SUHFLVLRQHV�YDULDEOHV�HQWUH������������\������PP�����������������(Q�HO�SUHVHQWH�HVWXGLR��VH� HPSOHy� XQ� PLFURVFRSLR� GLJLWDO� FRQ� XQD� SUHFLVLyQ� GH�������PP��FRQ�HO�REMHWLYR�GH�HYLWDU�HO�GHVJDVWH�GHO�PRGHOR�GXUDQWH� ODV�PHGLFLRQHV� D� UHSHWLFLyQ� \� DVt� REWHQHU� PHMRU�SUHFLVLyQ�� /DV� GLIHUHQFLDV� HQWUH� ORV� LQVWUXPHQWRV� SXHGHQ�FUHDU�YDULDFLRQHV��DO�FRPSDUDU�ORV�GLIHUHQWHV�HVWXGLRV�\��SRU�WDQWR��YDULDELOLGDG�HQ�ORV�UHVXOWDGRV�
&XDQGR�VH�DSOLFDQ�GLIHUHQWHV�PpWRGRV�HQ�OD�PD\RUtD�GH�ORV� HVWXGLRV�� VH� HQFXHQWUDQ� UHVXOWDGRV� GLVWLQWRV�� 8QD�VXEHVWLPDFLyQ�GHO�WDPDxR�UHDO�GH�ORV�GLHQWHV�IXH�HQFRQ-WUDGD�DO�DSOLFDU�HO�PpWRGR�GH�0R\HUV�S�������������VREUHVWL-PDFLyQ23�\�VXEHVWLPDFLyQ2�IXHURQ�HQFRQWUDGRV�DO�XVDU�HO�PpWRGR�GH�7DQDND�-RKQVWRQ�
/D� PRUIRORJtD� GHQWDO� \� HO� WDPDxR� GH� ORV� GLHQWHV� HVWiQ�GHWHUPLQDGRV� JHQpWLFDPHQWH����� ���� ���� ��� SRU� OR� WDQWR��HVWDEOHFHU� OD� DSOLFDFLyQ� \� UHSURGXFLELOLGDG� GH� ORV�DQiOLVLV�GH�GHQWLFLyQ�PL[WD�HQ�GLIHUHQWHV�SREODFLRQHV�HV�QHFHVDULR���� ��� ���� ��� (Q� HO� HVWXGLR� UHDOL]DGR� SRU� 3DUGR� HW�DO�� VH� HQFXHQWUD� TXH�� DO� DSOLFDU� DQiOLVLV� H[WUDQMHURV� HQ�SREODFLyQ� FRORPELDQD�� VH� DXPHQWD� HO� HUURU� GHO� DQiOLVLV�HQWUH�XQ����D�����31�/DV�FDUDFWHUtVWLFDV�UDFLDOHV�SURYHHQ�KHWHURJHQLFLGDG�HQWUH�ORV�LQGLYLGXRV�\�SXHGHQ�LQÁXHQFLDU�HO�WDPDxR�GHQWDO�������������������([LVWHQ�YDULDFLRQHV�FXDQGR�VH�DSOLFDQ�ORV�DQiOLVLV�GH�GHQWLFLyQ�PL[WD�HQ�SREODFLRQHV�FRQ�GLIHUHQWHV�RUtJHQHV�pWQLFRV������������6LQ�HPEDUJR��KD\�TXH�WHQHU�HQ�FXHQWD�TXH� OD�PXHVWUD�GHO�SUHVHQWH�HVWXGLR� IXH�SRU�FRQYHQLHQFLD��OR�TXH�OLPLWD�OD�FRPSDUDFLyQ�FRQ�RWURV�HVWXGLRV�� 3RU� OR� WDQWR�� ORV� UHVXOWDGRV�REWHQLGRV� GH� HVWH�JUXSR�GH� HVFRODUHV�GHPXHVWUD�TXH�H[LVWHQ� VXE�R� VREUH�HVWLPDFLRQHV�TXH�JHQHUDUtDQ�HUURUHV�HQ�OD�SUHGLFFLyQ�GHO�WDPDxR�GHQWDO�\�XQD�GLVFUHSDQFLD�FRQ�HO�HVSDFLR�H[LVWHQWH�
determine reproducibility or the correlation among
measures22 like the ones taken in the present study.
There are differences among the tooth size
measurement instruments within the models used in
WKH�UHSRUWHG�VWXGLHV��PDNLQJ�LW�GLI¿FXOW�WR�FRPSDUH�them. In his original project, Moyers used an optical
microscope (Optocom).10 Tanaka-Johnston used a
Vernier scale with 0.05 mm precision.7 Bishara used
a double bar compass22�DQG�,QJHUYDOO�D�VOLGH�JDXJH�23
other researchers used digital calipers with varying
precision ranging from 0.01, 0.02 to 0.03 mm.17, 25, 31, 32
In the present study, we used a digital microscope with
0.001 mm precision in order to avoid model wear
during the repeated measurements and to obtain
better accuracy. Differences among the instruments
can produce variations when comparing the different
studies, and therefore variability in the results.
When different methods are used in most studies,
a variety of results are obtained. Underestimation
of teeth actual size occurred when applying the
Moyers p75 method,7, 10, 20 but overestimation23 and
underestimation2 were found using the Tanaka-
Johnston method.
Dental morphology and teeth size are genetically
GHWHUPLQHG�14, 15, 23, 29 therefore, it is necessary to
establish application and reproducibility of mixed
dentition analyses in different populations.3, 6, 17, 20 In
the study by Pardo et al, they found out that applying
foreign analyses in Colombian population increases
HUURU�DQDO\VLV�IURP����WR�����31 Racial characteristics
create heterogeneity among individuals and can
LQÀXHQFH�WRRWK�VL]H�14, 17, 20, 33-35 Variations occur when
applying mixed dentition analyses in populations
with different ethnic backgrounds.15, 33, 36 However, it
should be noted that this study’s sample was selected
for convenience, which limits the comparison with
other studies. Therefore, the results among this group
of schoolchildren show over- and underestimations
that may generate tooth size prediction errors and
discrepancies with the existing space.
369
ASSESSMENT OF MOYERS AND TANAKA-JOHNSTON MIXED DENTITION ANALYSES FOR THE PREDICTION OF MESIODISTAL DIAMETERS OF UNERUPTED CANINES AND PREMOLARS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
CONCLUSIONES
6H�SXHGH�FRQFOXLU�TXH�HO�XVR�GH�XQ�VROR�PpWRGR�GXUDQ-WH�OD�SUiFWLFD�FOtQLFD��SXHGH�LQGXFLU�JUDQGHV�YDULDFLRQHV�HQ� OD�SUHGLFFLyQ�GHO� WDPDxR�GHQWDO� \�� SRU� WDQWR�� VH� UH-FRPLHQGD�OD�FRPELQDFLyQ�GH�ORV�PpWRGRV�GH�0R\HUV�\�7DQDND�-RKQVWRQ�HQ�OD�SREODFLyQ�HVWXGLDGD��SDUD�REWHQHU�PHMRU� UHSURGXFLELOLGDG�� WHQLHQGR�HQ�FXHQWD�TXH�DPERV�VREUHVWLPDQ� HO� YDORU� UHDO�� 7DQDND�-RKQVWRQ� VH� VXJLHUH�SDUD�HO�DUFR�VXSHULRU�\�0R\HUV�S���SDUD�HO�LQIHULRU�
AGRADECIMIENTOS
$JUDGHFHPRV�D� OD�'RFWRUD�/LEEH�0DULDFD�\�FRODERUDGR-UHV��TXLHQHV�UHDOL]DURQ�HO�HVWXGLR�HQ�OD�8QLYHUVLGDG�GH�$Q-WLRTXLD��\�FX\D�PXHVWUD�IXH�XVDGD�HQ�HO�SUHVHQWH�HVWXGLR�
CONFLICTOS DE INTERÉS
/RV�DXWRUHV�GHFODUDPRV�TXH�HO�PDQXVFULWR�HV�RULJLQDO��QR�KD�VLGR�SXEOLFDGR�SUHYLDPHQWH�\�QR�VH�HQFXHQWUD�HQ�SURFHVR�GH�HYDOXDFLyQ�HQ�QLQJXQD�RWUD�UHYLVWD��(O�HVWXGLR�WXYR�ÀQDQFLDFLyQ�SURSLD�SRU�SDUWH�GHO�&RPLWp�SDUD�HO�'H-VDUUROOR�GH�OD�,QYHVWLJDFLyQ��&21$',���GH�OD�8QLYHUVLGDG�&RRSHUDWLYD� GH�&RORPELD�� \� VH� FXPSOLy� FRQ� WRGRV� ORV�UHTXLVLWRV�SDUD�GLFKD�ÀQDQFLDFLyQ��
CORRESPONDENCIA
3DROD�%RWHUR&DOOH���VXU�1�����$$�����2ÀFLQD����0HGHOOtQ��&RORPELD7HOpIRQR���������������)D[��������������&RUUHR�HOHFWUyQLFR��SERWHURP#JPDLO�FRP
CONCLUSIONS
It can be concluded that using a single method
during clinical practice may induce large
YDULDWLRQV� LQ� WRRWK� VL]H� SUHGLFWLRQ�� LW� LV� WKHUHIRUH�recommended to combine Moyers and Tanaka-
Johnston methods in the studied population in
order to obtain better reproducibility, taking into
account that both methods overestimate actual
values. Tanaka-Johnston is suggested for the upper
arch and Moyers p75 for the lower arch.
ACKNOWLEDGMENTS
We thank Dr. Libbe Mariaca and collaborators, who
conducted the study at Universidad de Antioquia
and whose sample was used in the present study.
CONFLICTS OF INTEREST
The authors declare that the manuscript is
original, has not been previously published and
is not under evaluation in any other journal. The
study was funded by Comité para el Desarrollo
de la Investigación (CONADI), of Universidad
Cooperativa de Colombia, and met all the
requirements for such funding.
CORRESPONDING AUTHOR
Paola Botero
Calle 4 sur No. 43AA-26. Suite 206.
Medellin, Colombia
Phone: 57 4 3210479
Fax: 57 4 3116939
Email: [email protected]
370
VALORACIÓN DE LOS MÉTODOS DE ANÁLISIS DE DENTICIÓN MIXTA DE MOYERS Y TANAKA-JOHNSTON, EN LA PREDICCIÓN DEL DIÁMETRO MESIODISTAL DE CANINOS Y PREMOLARES NO ERUPCIONADOS
Revista Facultad de Odontología Universidad de Antioquia - Vol. 25 N.o 2 - Primer semestre, 2014
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of the Moyers mixed dentition probability tables and new
prediction aids for a contemporary population in India. Am
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of space available for unerupted permanent canine and
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