An in vitro study on the sizes of pulp chambers and clinical crowns of molars
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Дата
2011-10
Автори
Boteva, E.
Заглавие на списанието
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Издател
Централна медицинска библиотека, МУ София / Central Medical Library - MU Sofia
Резюме
The macromorphology of pulp chambers has been carefully studied
in the last few decades. But there is a serious lack of knowledge on the sizes
in different dimensions of the pulp chambers of molars. Aims of the present study
are jo measure the range and mean dimensions of the pulp chambers of upper
and lower molars; to detect the relation between the sizes of clinical crowns and
pulp chambers for better endocavity preparation. 286 upper and lower molars, 161
fi rst and second upper molars, 125 fi rst and second lower molars – matured, fully
mineralized and sound are used for the study. Measurements of the clinical crownthree
dimensions for each tooth in mm: mesio-distal, from the approximal marginal
ridge, bucco-lingual, from the top of buccal cusp to the top of the mesio-lingual
(palatal) cusp. The height of the crown is measured from the buccal side. Measurements
of the pulp chambers: 40 randomly selected upper and lower molars, 20 in
each group without severe root canal curvatures are measured under the following
technology: the pulp chambers are opened with horizontal cuts, 1 mm apically from
the equator with diamond blend. After polishing the ridges the fi nal size of the endocavity
is 2 mm bellow the equator. Both buccolingual dimensions are measured
as L1 and L2, and the mean as L with endodontic fi le and endoblock in mm. It can
be useful for the lecture courses BL sizes less than ½ of the cusp distance to be
avoided for endocavity preparation. A careful approach to this sizes of crowns and
chambers can lead to safe hard dental tissues during endocavity preparation and
especially careful approach to the approximal walls of the teeth. This fi ndings are important for the prevention of crown fractures, of posts and pins and of crowns and bridges in young age groups.
Описание
Address for correspondence:
Assoc. Prof. E. Boteva;
Faculty of Dentisty;
Medical University – Sofia;
3 Sv. G. Sofiiski;
1431 Sofia;
e-mail: e_boteva@abv.bg
Ключови думи
macromorphology, pulp chambers, sizes, crowus, molars
Цитирания
E. Boteva. An in vitro study on the sizes of pulp chambers and clinical crowns of molars - Acta medica bulgarica , 38, 2011, No 2, 83-88.