Authors: Cameron CE.
Title: The cracked tooth syndrome: additional findings.
Journal: J Am Dent Assoc
Date: Nov 1976
Citation: 93(5):971-5
Category: Diagnosis and Case Selection
Evidence-based Ranking: 4
Purpose: To investigate 102 posterior teeth with cracks.

Observation/Treatment: Most frequent symptom of a cracked tooth is discomfort during chewing, followed by sensitivity to cold. Diagnostic methods are tapping on the various cusps in different directions, having the patient bite on a wooden toothpick, staining, transillumination, and patient’s previous dental history of crack teeth. Of 102 cracked teeth, 30% of the patients were 60yr old or older, 28% 50-60, 22% 40-50, and 20% under 40. 81% of the cracked teeth were moderately worn and 13% severe. 2/3 of the 102 cracked teeth were mandibular molars. 54.5 patients had amalgam restorations 21-Occulssal, 8-MO, 7-DO, and 18.5-MOD. 40.5 patients had gold inlays: 7-occulssan, 15-MO, 4-DO, and 14.5-MOD. Only five normal unrestored teeth were cracked. 25% of the teeth were required for Endodontic treatment or extraction. 25% of the teeth had enough tooth structure for onlays. 50% percent of the teeth received crowns.

Author’s Conclusion: Practitioners should be aware of the crack tooth syndrome. Early diagnosis and treatment can prevent further cracking into the pulp and fracture of the tooth.

Validity/Reviewer’s Comments: This study was more of an observation and reporting of findings. There were no controls and nothing was being tested. Good study that describes findings of cracked teeth.