nasal morphology / orthodontic courses by indian dental academy
TRANSCRIPT
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NASAL INTEGUMENT - AN INDICATOR OF MAXILLARY SKELETAL PATTERN
PAR – 103
INDIAN DENTAL ACADEMY
Leader in continuing dental education www.indiandentalacademy.com
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CONTENTS
INTRODUCTION BASIC ANATOMY OF NOSE AND MAXILLA GROWTH & DEVELOPMENT SKELETAL MORPHOLOGY INDICATOR
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INTRODUCTION
FACIAL INTEGUMENTFACIAL SKELETON
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Importance of integument
Will integument follow underlying skeleton pattern?
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ANATOMY OF MAXILLA
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RIGHT AND LEFT MAXILLA
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NASAL ANATOMY
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EXTERNAL MORPHOLOGY
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COLUMELLA
ALAE
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INTERNAL MORPHOLOGY[SKELETAL]
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NASAL PARAMETERS
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GROWTH & DEVELOPMENT
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NASAL INTEGUMENT AS AN INDICATOR OF MAXILLARY SKELETAL PATTERN
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AIMS AND OBJECTIVES
Evaluate nasal morphology in sagittal and vertical maxillary excess.
Evaluate nasal morphology in sagittal and vertical maxillary deficiency.
To correlate the nasal morphology to class II skeletal and class III skeletal patterns.
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MATERIALS AND METHODS
DATA PRESENTATION
Pretreatment lateral cephalometric radiographs of 40 patients / 4 sub groups
10 Patients Sagittal Maxillary Deficiency
10 Patients Sagittal Maxillary Excess
10 Patients Vertical Maxillary Deficiency
10 Patients Vertical Maxillary Excess
5Male and 5Female in each subgroup
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SOURCE OF SAMPLE
Pretreatment lateral cephalometric radiographs of Sample selected from the patients who are visiting department of orthodontics at Narayana dental college.
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INCLUSION CRITERIA
1. AGE > 18 Years for both Male and Female samples
EXCLUSION CRITERIA
1. Prior history of Orthodontic treatment
2. History of Trauma or Surgery to Facial region
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WWW.INDIANDENTALACADEMY.COMVertical facial skeletal parameters assessed on lateral cephalogram
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WWW.INDIANDENTALACADEMY.COMSoft tissue reference planes and variables used to assess nose on
lateral cephalogram
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NORMATIVE VALUES FOR ADULT NASAL PARAMETERS
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RESULTS
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SIGNIFICANT CORRELATION WERE SEEN BETWEEN THE FOLLOWING SKELETAL AND SOFT TISSUE NASAL VARIABLES
1.ANTERIOR FACIAL HEIGHT AND NASAL LENGTH
AFH NASAL LENGTH
2.ANGLE OF INCLINATION AND NASAL LENGTH
- AOI NLTH
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3.UPPER ANTERIOR FACIAL HEIGHT AND NASAL DEPTH
- AFH ND
4.AOI AND NASAL DEPTH
AOI ND
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5.NASOLABIAL ANGLE AND ANTERIOR FACIAL LENGTH
AFH NASOLABIAL ANGLE
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CONVEX NASAL PROFILE IS SEEN IN CLASS II CASES
CONCAVE NASAL PROFILE IS SEEN IN CLASS III CASES
NASAL DEPTH IS INCREASED INCREASED MAXILLARY SAGITTAL DIMENSIONS
NASAL LENGTH INCREASED IN CLASS III SKELETAL PATTERNS
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DISCUSSION
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Subtelny [AJO 1959;45:481-507],
- first demonstrated downward and forward growth of mandible during maturity.
-nose grows more vertically when compared to its growth in sagittal dimension.
Meng etal [AJO1988 ],
-Supported the subtelny conclusions
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Scott [Br.Dent J 1953;95:37-43],
- Nasal septum is determinant of midfacial growth
Lathum [J Anat 1970;107:47-78],
-nasal septum acted as a starter mechanism ,pulling the premaxillae and maxillae forward via the so called septo-premaxillary ligaments
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Grymer et al [Rhinology 1997;35: Abstract],
- Deficient nasal septum growth along with decreased anteroposterior growth of the maxilla leads to an upward displacement of the anterior part of the maxilla indicating a strong relationship between nasal growth and inclination of the maxillary plane.
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Robinson et al [AJO 1986;89:499-506],
-Their cephalometric study on the
relationship between skeletal facial pattern and soft
tissue nasal form concluded that nasal shape followed
the underlying skeletal pattern very closely in the
sagittal dimension.
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Peter H. Buschang [JCO 1992;26:111-118],
-Horizontal growth at pr and sn is closely associated with horizontal growth at ANS and A POINT
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CONCLUSION
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-Nasal length was seen to be significantly correlated to
upper anterior facial height and inclination of palatal
plane.
-An upturned nose in an adult individual was
significantly correlated with anti-clockwise rotation
of maxilla.
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-SIgnificant correlation is present between nasal projection and nasal length with sagittal maxillary dimensions.
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Growth and development of any structure will occur in three dimensions of space simultaneously and the overlying integument adapts in three dimensions.so,its wise to understand the concept in three dimensions of space than analyzing in one or two dimensions.
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Thank you
For more details please visit
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