The Dentigerous Cyst
Patient Profile: Patient is a 72-year old lady who attended her dentist with a lump at the back of her lower jaw. The lump was present for over six months and progressively increasing in size.
Chief Complaint: “I have a lump at the back of my mouth and every time I bite together it is very sore”
Dental History: Her last dental appointment was over one year ago for a cleaning and she was a regular dental attender with a well maintained dentition.
Medical History: The patient was diabetic and medicated on Metformin. Hb1aC was reported as favourable. Bloods were all within normal limits and blood pressure was recorded at 135/85 mm/hg.
Extraoral Examination:
- Assessment reported all within normal limits.
Supplemental Information:
- There was no buccal or lingual expansion.
- There was no neurosensory deficit.
- There was no infection but the superior aspect of the cyst was in traumatic occlusion with the upper molars when in centric occlusion.
- CT scan was necessary to determine the relationship of the wisdom tooth to the inferior alveolar nerve.
- The patient had the cyst enucleated and tooth extracted under GA without complication.
- There was no post-op neurosensory deficit and healing was uneventful.
- Histopathology confirmed a dentigerous cyst.

Pre-op X-ray
“I was very concerned as to what the lump was in my jaw and I am so relieved it was a cyst. I knew I couldn’t have this done in my senses and I am so grateful Mr. McCourt added me to his list at the Blackrock Clinic. Everyone was very nice and reassuring.”