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FM4.2-3,FM14.4 | Age & Dental Identification & Age Estimation — SDL Guide (Part 3)
Preparing the Age Estimation Report (FM14.4 Applied Practice)
The age estimation examination and report preparation for FM14.4 involves a structured, documented procedure that integrates all the above methods. The following is the procedural sequence for a living person referred for medicolegal age estimation:
Step 1 — Receive and record the requisition. Note the MLC number, the requesting authority (magistrate, police officer, JJ Board), the legal question posed (e.g., 'determine if subject is above or below 18 years'), and the purpose (criminal age determination, POCSO victim, matrimonial case).
Step 2 — Obtain informed consent. The subject (or guardian if a minor) must consent to examination and radiological investigation. Document consent in writing. If the subject refuses X-ray, note the refusal and proceed with clinical examination only — stating limitations in the report.
Step 3 — Clinical examination. Examine and document:
- General appearance, build, secondary sexual characteristics (Tanner staging: breast/pubic hair/genital development stage I–V)
- Dental examination: eruption status of all four third molar sites; condition of teeth (attrition, spacing, restorations)
- Height and weight (relevant to growth parameters)
Step 4 — Radiological investigation. Order:
- X-ray left hand and wrist (bone age, distal radius fusion)
- X-ray chest (medial clavicle epiphysis — the most important single view for 18-yr threshold)
- X-ray pelvis (iliac crest, femoral head epiphysis)
- Dental X-ray (OPG) for third molar assessment if clinically unerupted
Step 5 — Integrate findings and calculate age range. For each parameter, note the finding and its age implication:
- 'Third molars partially erupted, consistent with 17–21 years'
- 'Medial clavicle epiphysis partially fused, consistent with 18–25 years'
- 'Iliac crest not fully fused, consistent with <20–21 years'
- 'Tanner Stage IV pubic hair, consistent with 13–17 years (females) or 13–17 years (males)'
Then synthesise: the overlapping range of all parameters gives the final estimated age range.
Step 6 — Write the report. Standard report language:
'On examination of [Subject name/MLC no.], date [DD-MM-YYYY], the following findings were observed: [list findings with parameters]. Based on the above, the estimated age of the subject is [X–Y years]. The 18-year legal threshold [can/cannot] be excluded on the basis of the available biological evidence. This opinion is subject to revision if documentary evidence of age becomes available.'
The report must be signed by the examining doctor with registration number, hospital, and date. If X-ray interpretation is by a radiologist, their countersignature must be included.
Critical professional rule: Never give a definitive single-age opinion unless all parameters converge to a narrow range that excludes the threshold in question. Courts understand and accept age ranges; what they cannot accept — and what will be demolished under cross-examination — is false precision.
CLINICAL PEARL
The third molar and the clavicle are the two 'threshold teeth' of Indian forensic practice. The third molar erupts at 17–21 years, directly straddling the legally critical 18-year mark; the medial clavicular epiphysis fuses at 25 years and straddles it from the other direction. Together, these two sites provide the most forensically actionable biological evidence for 18-year threshold determination. A practical rule: if the third molar is NOT yet visible clinically or on OPG, and the medial clavicle epiphysis is NOT yet fused (still showing as a separate line on X-ray), the age is most likely between 17 and 21 years — the exact legal threshold range. In these cases, state the range explicitly and do not attempt to resolve the legal question — that is the court's role.
Self-Assessment: Age and Dental Identification
Test your understanding before reviewing the answers.
Case 1: A tooth is submitted from an unidentified body. Dental examination shows: attrition score 3, secondary dentine 2, cementum apposition 2, root transparency 2, root resorption 1, periodontal recession 2. Calculate the estimated age using Gustafson's formula.
Case 2: A 16-year-old girl is referred after a sexual assault. The accused claims to be under 18. His X-ray shows the medial clavicle epiphysis is present as a separate centre but not yet fused. What is the age implication, and what is your report conclusion regarding the 18-year threshold?
Case 3: A child with no birth certificate is brought to court. She has all deciduous teeth present, with no permanent teeth erupted, and no X-ray is available. What is the estimated age range?
Case 4: Name the six criteria of Gustafson's method and state the maximum possible score per criterion.
Answers:
1. Total score = 3+2+2+2+1+2 = 12. Age = 11.43 + (4.56 × 12) = 11.43 + 54.72 = 66.15 years → reported as '62–70 years (Gustafson's method, ±3.6 yr SE)'.
2. Medial clavicle epiphysis appearing but not fused = approximately 16–25 years. The 18-year threshold CANNOT be excluded — report must state: 'The estimated age is consistent with 16–25 years; the 18-year legal threshold cannot be excluded by the available biological evidence.'
3. All deciduous teeth present, no permanent teeth = approximately 2.5–6 years (all deciduous teeth complete by ~2.5 yr; first permanent molar erupts at ~6 yr).
4. Six criteria: Attrition (A), Secondary dentine deposition (S), Cementum apposition (C), Root transparency (R), Root resorption (Re), Periodontal recession (P). Each scored 0–3 (maximum 3 per criterion).