Characteristics of Medial Depression of the Mandibular Ramus in Patients with Orthodontic Treatment Needs: A Panoramic Radiography Study
Background: Medial sigmoid depression or medial depression of the mandibular ramus (MDMR) is a known variant of the normal radiographic anatomy. The clinical importance of MDMR has been recognized, however, its prevalence and association with patients with orthodontic needs have been poorly docu...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
JCDR Research and Publications Private Limited
2014-11-01
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| Series: | Journal of Clinical and Diagnostic Research |
| Subjects: | |
| Online Access: | https://jcdr.net/articles/PDF/5192/9869_CE(RA1)_F(T)_PF1(PAK)_PFA(Sh)_PF2(PAG).pdf |
| Summary: | Background: Medial sigmoid depression or medial depression of
the mandibular ramus (MDMR) is a known variant of the normal
radiographic anatomy. The clinical importance of MDMR has
been recognized, however, its prevalence and association with
patients with orthodontic needs have been poorly documented.
Aims and Objectives: To estimate the prevalence and
characteristics of MDMR on panoramic radiographs of patients
with different Angle’s molar relation.
Materials and Methods: Three hundred panoramic radiographs
of 100 each belonging to patients with Angle’s class I, II and III
molar relationship was recruited from an orthodontic clinic. The
radiographs were evaluated for presence of MDMR along with its
characteristics such as site and shape. The data was entered in
the proforma and subjected for statistical analysis.
Results: The overall prevalence of MDMR in the present study
was 23.2%. MDMR was found to be more prevalent in Class II –
28 (9.3%) followed by class III-23 (7.6%) and Class I- 19 (6.3%).
There was equal distribution of MDMR with respect to site and
the semilunar shape was the most common 36 (34%). All these
findings were statistically non-significant.
Conclusion: Although MDMR is considered as a normal
radiographic finding, the present study confirms the disparity in the
prevalence of MDMR in patients with dentoskeletal deformities.
Thus our findings suggest the importance of recognizing this
entity prior to orthognathic surgery so as to avoid untoward
sequelas. |
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| ISSN: | 2249-782X 0973-709X |