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Analysis of factors associated with cracked teeth

 Deog-Gyu Seo  ;  Young-Ah Yi  ;  Su-Jung Shin  ;  Jeong-Won Park 
 JOURNAL OF ENDODONTICS, Vol.38(3) : 288-292, 2012 
Journal Title
Issue Date
Adult ; Age Factors ; Aged ; Bicuspid/injuries ; Composite Resins/chemistry ; Cracked Tooth Syndrome/classification ; Cracked Tooth Syndrome/diagnosis* ; Crowns ; Dental Amalgam/chemistry ; Dental Enamel/injuries ; Dental Materials/chemistry ; Dental Porcelain/chemistry ; Dental Pulp Test ; Dental Restoration, Permanent/classification ; Female ; Follow-Up Studies ; Gold Alloys/chemistry ; Humans ; Inlays ; Male ; Middle Aged ; Molar/injuries ; Periodontal Pocket/diagnosis ; Root Canal Therapy ; Sex Factors ; Tooth Crown/injuries ; Tooth Fractures/classification ; Tooth Fractures/diagnosis* ; Tooth Root/injuries ; Tooth Wear/diagnosis
Associated factors ; bite test ; cracked tooth ; longitudinal tooth fracture ; restoration materials
INTRODUCTION: The purpose of this study was to analyze the characteristics, distribution, and associated factors of longitudinal fractured teeth according to the well-defined criteria of the American Association of Endodontists (AAE).

METHODS: One hundred seven teeth with longitudinal fracture from 103 patients were diagnosed and analyzed. The patients' signs, symptoms, age, and sex were noted as well as the tooth number, dental arch, filling materials, size/classification of restoration, crack direction, pulp vitality, whether the patient had undergone endodontic treatment, bite test results, percussion test results, wear facet, and periodontal pocket depth.

RESULTS: Eighty-seven teeth were diagnosed with a cracked tooth (81.3%), 14 were diagnosed with vertical root fracture (VRF, 13.1%), 4 had a split tooth (3.7%), and 2 had a fractured cusp (1.9%); 82.2% showed a sensitive reaction on the bite test. Longitudinal tooth fractures were observed most frequently in patient in their 40s. The upper first molar (28.0%) was most frequently cracked, followed by the lower first molar (25.2%), the lower second molar (20.6%), and the upper second molar (16.8%). Most longitudinal tooth fractures (72.0%) occurred mainly in restored teeth, whereas only 28.0% were found in intact teeth. Compared with resin (4.7%) or porcelain (0.9%), the use of nonbonded inlay restoration materials such as gold (20.5%) or amalgam (18.7%) increased the occurrence of longitudinal tooth fractures. Out of 107 of longitudinal fractured teeth, 33 (30.8%) were treated endodontically and 74 (69.2%) were not. VRF was associated with endodontic treatment.

CONCLUSIONS: The bite test is most reliable for reproducing symptoms. The combined use of various examination methods is recommended for detecting cracks and minutely inspecting all directions of a tooth.
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2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
Yonsei Authors
Park, Jeong Won(박정원) ORCID logo https://orcid.org/0000-0002-2517-8150
Shin, Su Jung(신수정) ORCID logo https://orcid.org/0000-0001-5795-3919
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