This topic is a part of Forensic Anthropology. Forensic Anthropology Sutures of the Skull The sutures are a type of fibrous joint, found in between many of the bones that make up the skull. Today we're going to take a look at three sutures; the coronal suture, the sagittal suture and the lambdoid suture. *There are four major sutures that connect the bones of the cranium together: the frontal or coronal, the sagittal, the lambdoid, and the squamous. The frontal suture connects the frontal bone to the two parietal bones. The sagittal suture connects the two parietal bones.

1. Sutures of the
Skull

2. Objective :-
Identify the different sutures in the
human skull and highlight which
sutures are most commonly
affected.
Make a table of the times of suture
closure for the human skull,
including the mid palatal suture

3.  Cranial sutures are a type of joint or
syndesmosis between cranial bones
composed of fibrous tissues.
 Thee skull vault consists of five principal
bone
The paired frontals and parietals
 Occipital bone
Sutures of the Skull:-

4.  Six primary sutures of the cranial vault exist,
including
The paired coronal sutures (between the frontal
and parietal bones)
 The paired lambdoid sutures (between the parietal
and interparietal bones)
 The single sagittal suture (between the parietal
bones)
 The single metopic suture (between the paired
frontal bones)
Sutures of the Skull:-

5. Sutures of the Skull:-

6. Origins of the calvaria – partly
neural crest cells and partly
mesoderm
 The cranium develops from mesenchyme
around the developing brain and consists
of:
The Neurocranium – protective case around
the brain
 The Viscerocranium – the face

7.  Craniosynostosis can involve any of
these sutures either alone or in multiple
combinations.
 Several other minor sutures, including
the temporosquamosal, frontonasal, and
frontosphenoidal, may also be involved
in premature fusion but less is
comparatively known regarding these.
Affected Sutures:-

9. Suture closure :-
Sutures Timing
Coronal 22-35 years
Sagittal 22-35 years
Lambdoid 22-35 years
Metopic 3-9 Months
Mid palatal After 11 years

10. Midpalatal suture maturation: Classification method
for individual assessment before rapid maxillary
expansion
 The aim of this study:
 was to present a novel classification method for the individual
assessment of midpalatal suture morphology using CBCT
images because RME is an unpredictable treatment for late
adolescent and young adult patients
 Methods:
CBCT scans from 140 subjects (86 female, 54 male), with
ages from 5.6 to 58.4 years and no history of previous
orthodontic treatment, were examined to determine the
radiographic stages of midpalatal suture maturation

11.  The definition of each CBCT radiographic appearance
of the sutural maturation stage followed the findings of
unique morphology in the maturation of the midpalatal
suture described in previous histologic studies.
Midpalatal suture maturation: Classification method
for individual assessment before rapid maxillary
expansion

12. Stages of the Maturation

13.  Maturation stage of midpalatal sutures was
evaluated with CBCT in 11- to 15-year-olds.
 Stage B was present at all ages, but was more
prevalent in those younger than 13.
 Stage C was the most prevalent in all evaluated
ages.
 Stages D and E showed low prevalence rates.
 RME can be performed in patients 15 or older with
stage C sutural maturation status.
Stages of the Maturation

14. Midpalatal suture maturation: Classification
method for individual assessment before rapid
maxillary expansion

15. Historical Assessment:-
 Histologic analysis is limited to assessments of small
sections of the total anteroposterior suture length only,
even if several serial sections from 1 area are available.
 In histologic studies only frontal sections have been
evaluated; this restricts their clinical application,
especially since midpalatal suture maturation occurs
from the posterior to the anterior region.
 Histologic data do not explain why it is difficult to open
the midpalatal suture clinically with conventional RME
in patients older than 25 years of age.

16. Midpalatal Suture Fusion:-
 RME is obtained easily up to 10 years of age, with more
skeletal effects than in later circumpubertal ages (11-18
years).
 A clinical attempt of RME in most adult patients would
probably fail in the posterior region despite the
interincisal opening and in the maxillary bone portion
of the suture, leading to failure of the RME procedure.

17. Thank You 😊