Pont's Analysis is an
analysis developed by Pont in 1909. This analysis allows one to
predict the width of the maxillary arch at the
premolar
The premolars, also called premolar teeth, or bicuspids, are transitional teeth located between the canine and molar teeth. In humans, there are two premolars per quadrant in the permanent set of teeth, making eight premolars total in the mouth ...
and
molar region by measure the mesio-distal widths of the four permanent
incisors. The analysis helps to determine if the
dental arch is narrow or normal and if expansion is possible or not.
The width from Left Premolar to Right Premolar or ''Measured Premolar Value (MPV)'' can be calculated by using Sum of Incisal Widths (S.I) of incisors and multiplying it by 100. The result can be divided by 80.
The width from Left Molar to Right Molar or ''Measured Molar Value (MMV)'' can be calculated by using the S.I of incisors and multiplying by 100. The result is divided by 64.
The widths are measured from
occlusal grooves of both premolars and molars.
Disadvantages
One of the drawbacks of this analysis is that the analysis was initially done on
French
French (french: français(e), link=no) may refer to:
* Something of, from, or related to France
** French language, which originated in France, and its various dialects and accents
** French people, a nation and ethnic group identified with Franc ...
Population by Pont. Therefore, the
data cannot be used to make
prediction
A prediction (Latin ''præ-'', "before," and ''dicere'', "to say"), or forecast, is a statement about a future event or data. They are often, but not always, based upon experience or knowledge. There is no universal agreement about the exact ...
s for other
populations. This analysis also does not take the alignment of the
teeth into consideration.
[{{cite journal, last1=Joondeph, first1=Donald, title=Pont's Index: A clinical Evaluation, journal=Angle Orthodontist, volume=40, issue=2, pages=112–8, date=1970, url=http://www.angle.org/doi/pdf/10.1043/0003-3219(1970)040%3C0112:PIACE%3E2.0.CO%3B2, access-date=17 January 2016, pmid=5266011] In addition, because this analysis only applies to the upper arch serves a drawback also. Maxillary teeth are often missing and
Peg Laterals are often seen in the maxillary arch.
Linder Harth Index
Linder Hath index is derived from Pont's Index. The Hath index has a slight variation from Pont's analysis. In the maxillary arch instead of 80, Linder Harth Index uses 85 to achieve the Measured Molar Value.
See also
*
Dentition Analysis
References
Orthodontics
Analysis