Medial Clavicle Epiphysis
Definition
The last secondary ossification centre to fuse in the human skeleton, completing at 21 to 30 years depending on sex and population. Staged using the Schmeling four-point scale. A key landmark in the forensically critical 18-to-26 year age window for immigration age assessment and other legal contexts.
- Last epiphysis to fuse
- The sternal end of the clavicle is the final secondary ossification centre to fuse in the human skeleton
- Typical fusion age
- 21 to 25 years, with completion extending to 21-30 years depending on sex and population
- Assessment method
- Schmeling four-point scale, typically assessed via CT imaging
- Forensic use
- Central to adult-versus-minor determination in the forensically critical 18-26 year age window
Common questions
Why does the medial clavicle epiphysis matter in age assessment?+
It is the very last bone in the human skeleton to fully fuse, typically between 21-25 years. This makes it a critical landmark for determining whether someone has reached adulthood, especially in legal contexts like immigration age assessment or other situations where the 18-to-26 year window is forensically important.
How is the fusion stage of the medial clavicle epiphysis measured?+
The Schmeling four-point scale is the standard method for staging fusion. This scale allows forensic examiners to assess the degree of fusion using imaging like CT scans, which helps narrow down age estimates in cases involving young adults.
At what age does the medial clavicle epiphysis typically finish fusing?+
Completion occurs between 21 to 30 years, with typical fusion happening around 21-25 years. The exact timing varies by sex and population, which is why examiners must account for these biological variables when making age determinations.
Related terms
- Epiphyseal Fusion
- The obliteration of the cartilaginous growth plate and bony union of the epiphysis with the diaphysis. Fusion sequence and timing form the...
- Scheuer-Black Framework
- The reference system for developmental skeletal age estimation published by Louise Scheuer and Sue Black in 'Developmental Juvenile Osteology' (Academic Press, 2000)....
- AlQahtani London Atlas
- A 2010 dental developmental atlas covering birth to 23.5 years, constructed from a multi-ethnic London collection with known age at death; the...
- Appendicular Skeleton
- The 126-bone system of the human limbs and their girdles: the pectoral girdle (4), upper limbs (60), pelvic girdle (2 os coxae),...
- Axial Skeleton
- The 80-bone central structural column of the human skeleton: the skull (29 bones), the vertebral column (26 bones including sacrum and coccyx),...
- Demirjian Stages
- A seven-stage (A-G) scoring system for dental crown and root development applied to seven mandibular teeth; the maturity score derived from the...
- Dental Eruption
- The process by which a tooth moves through the alveolar bone and gingiva to emerge into the oral cavity. Eruption timing is...
- Endochondral Ossification
- The process by which bone replaces a cartilage precursor. All long bones, the vertebrae, the ribs, and the cranial base form by...
- ICMR Dental Standards
- Indian Council of Medical Research benchmarks for dental eruption and development in Indian children, used alongside the Bagga atlas to provide population-appropriate...
- Intramembranous Ossification
- The process by which bone forms directly from a mesenchymal membrane without a cartilage intermediate. Produces the flat bones of the skull...
- Moorrees-Fanning-Hunt Stages
- A 13-stage system of dental crown and root development derived from the Fels Longitudinal Study (1963), applied to mandibular teeth and forming...
- Mukherjee 1955 Dataset
- Sub-adult skeletal age reference data published by P. K. Mukherjee and colleagues from AIIMS New Delhi, demonstrating that several epiphyses fuse 1...
Explained in these topics
- Sub-Adult Age from Dental Eruption and Epiphyseal FusionThe sternal end of the clavicle, the last epiphysis to fuse in the human skeleton (typically 21-25 years). Its CT-assessed fusion stage is central to the adult...
- The Human Skeleton: Axial, Appendicular and the Ossification TimelineThe last secondary ossification centre to fuse in the human skeleton, completing at 21 to 30 years depending on sex and population. Staged using the Schmeling...