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Table 1 Description of impacted third molars

From: Intentional partial odontectomy—a long-term follow-up study

# Age Sex Site Pell & Gregory classification Pederson
difficulty index
Pre-operative status F/U (mo.) Complication
AK HC RS IP
1 48 F #48 IIIC M 7 + C + 118.4 trismus
2 59 M #38 IIIC H 8 + + C + 91.5
3 39 M #48 IIIC M 7 + C + 65.8
4 32 F #38 IIC M 6 + C + 47.5 Bone fragment
5 32 F #48 IIIC V 9 + C + 46.8
6 43 F #38 IIIC M 7 + D + 32.7 pain, trismus
7 49 M #38 IIIB V 8 + + D + 33.4
8 25 M #48 IIIB H 7 + D + 60.2
9 25 M #38 IIIC H 8 + C + 59.7
  1. Difficulty index 3–4(slightly difficult), 5–6(moderately difficult), 7–10(very difficult)
  2. AK ankylosis, HC hyper-cementosis, RS root shape, IP IAN proximity (≤ 2 mm), M mesio-angular, H horizontal, V vertical, C convergent, D divergent