4-Year Tooth Survival Calculator
Brought to you by Dr. Addokhi Ali, Endodontist
Case Priority
3 – Asymptomatic
2 – Symptomatic without swelling
1 – Symptomatic with Swelling
Medical status
Medically fit (0)
Controlled medical condition (1)
Uncontrolled medical condition (3)
Life-threatening (6)
Periodontal consideration
0 – Good oral hygiene
1 – Generalized gingivitis
3 – Signs of periodontitis
6 – Advanced periodontal disease / mobility / probing depth >5 mm
Buccal
Lingual
Mesial
Distal
Occlusal
Click on the tooth walls and occlusal surface to indicate remaining coronal structure.
Remaining coronal structure: 100%
Tooth Number
Select tooth number
#11 #12 #13
#14 #15 #16
#17 #18
#21 #22 #23
#24 #25 #26
#27 #28
#31 #32 #33
#34 #35 #36
#37 #38
#41 #42 #43
#44 #45 #46
#47 #48
Is this tooth the chief complaint?
It's the chief complaint
It's not the chief complaint
Working Diagnosis - Pulpal
Select pulpal diagnosis
Irreversible pulpitis
Pulp Necrosis
Previously initiated root canal treatment
Previously root canal treated
Working Diagnosis - Periapical
Select periapical diagnosis
Symptomatic apical periodontitis
Normal Apical tissue
Asymptomatic apical periodontitis
Acute apical abscess
Chronic Apical Abscess
Periapical consideration (+1 if lesion present)
No
Yes – periapical lesion present (+1 point)
Endodontic score (0–6)
0 – No treatment needed
1 – Initial treatment
2 – Non-surgical retreatment / anatomically challenging
6 – Untreatable (apicoectomy?)
Instrument Separation (file separation)
No
Yes – instrument separation occurred
Location of separated instrument
Coronal third
Middle third
Apical third
Stage when separation occurred
Before cleaning and shaping
After cleaning and shaping
Perforation
No
Yes – perforation occurred
Location of perforation
Coronal third (worst prognosis)
Middle third (questionable)
Apical third (best prognosis)
Time of perforation
Recent perforation (better prognosis)
Old perforation
Prosthodontic consideration
0 – No prosthodontic consideration
1 – Signs of wear facets or no opposing
2 – Used as an abutment
6 – Complex prosthodontic plan (e.g. replacement with implant)
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