THE CASE FILES CASE 001 — MAXILLARY FIRST MOLAR

The canal that wasn't there.

Two years of unexplained pain after a "finished" root canal — until 3D imaging revealed a fourth canal, sealed shut by calcification and invisible on every X-ray.

COMPLEX ANATOMY ✦✦✦ EXTREME 2 HOURS ★ FEATURED
Recall CBCT showing complete healing and bone regeneration
Pre-operative CBCT showing missed MB2 canal and periapical bone loss
BEFORE AFTER
◂▸
The canal that wasn't there
CASE 001 — COMPLEX ANATOMY · TORRANCE
THE PLATES — FULL SEQUENCE
Pre-op CBCT — missed MB2 canal with periapical bone loss MB2 canal orifice located after calcified tissue removal MB1 and MB2 canals cleaned and obturated Final radiograph — all four canals obturated Recall CBCT — healing and bone regeneration Recall CBCT — complete healing
THE CASE

One tooth's journey, in four beats.

01
THE PROBLEM

A finished tooth, still aching.

A 45-year-old referred by his Manhattan Beach dentist: root canal completed two years earlier, yet the intermittent pain and percussion sensitivity never left. The exam showed nothing wrong.

02
THE PICTURE

The map said otherwise.

CBCT imaging told a different story — a completely calcified MB2 canal, invisible on standard X-rays, with infection already forming at the root tip.

03
THE WORK

Troughing through stone.

Under the microscope, ultrasonic tips carved a pathway through the sclerotic dentin; micro-openers negotiated the canal, and GentleWave irrigation cleaned where needles cannot reach. Two focused hours.

04
THE RETURN

Bone, growing back.

All four canals sealed. At recall the CBCT shows the bone regenerated — the patient asymptomatic two years on, the tooth fully functional.

THE PROTOCOL
  • ✦  CBCT analysis to pinpoint the MB2 orifice and depth of calcification
  • ✦  Surgical microscope at 16× for visualization
  • ✦  Ultrasonic troughing (CPR tips) through the sclerotic dentin shelf
  • ✦  Size 06–08 micro-openers negotiated to full working length
  • ✦  GentleWave multisonic irrigation of the complex anatomy
  • ✦  Warm vertical compaction — three-dimensional seal of all four canals
WHAT THIS CASE TEACHES

What this case teaches.

ANATOMY MB2 is almost always there The second mesiobuccal canal exists in roughly 95% of these molars. When it can't be found, assume calcified — not absent. The CBCT tells the truth.
PATIENCE Slow is the only safe speed Rushing a calcified canal ends in perforation. Two hours of methodical troughing is what saving this tooth actually costs.
TECHNOLOGY Impossible fifteen years ago CBCT, the microscope, and multisonic irrigation turned this from an extraction into a healed, symptom-free tooth.
CLINICAL DISCLAIMER: PRESENTED FOR EDUCATIONAL PURPOSES WITH PATIENT CONSENT. IDENTIFYING INFORMATION REMOVED PER HIPAA. INDIVIDUAL RESULTS VARY. ALL IMAGES REPRESENT ACTUAL PATIENT TREATMENT.
THE GALLERY CONTINUES

More from the collection.

The procedure behind this case: CBCT 3D Imaging →
MORE FROM COMPLEX ANATOMY
  • The C-shaped labyrinth — Severe decay in a lower molar hid a rarity: no separate canals at all, but one continuous C-shaped ribbon of pulp — anatomy that defeats every standard technique.
SEE ALL COMPLEX ANATOMY CASES →
← PREVIOUS · CASE 015 — TOOTH #3 Scheduled for extraction, still here Another provider said the tooth had to go — a perforation, a draining sinus tract, a root canal that had failed. Five years after combined retreatment and surgical repair, it's still doing its job. NEXT · CASE 002 — MANDIBULAR SECOND MOLAR → The C-shaped labyrinth Severe decay in a lower molar hid a rarity: no separate canals at all, but one continuous C-shaped ribbon of pulp — anatomy that defeats every standard technique.
VIEW ALL 15 CASES

Pain that outlasted the treatment?

A missed canal is a solvable problem. Start with imaging that sees all of it.

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