A Measurement Of The Cuspal Inclination In The Maxillary Molars With Cracked Tooth Syndrome And Its Stress Analysis

The Cracked Tooth Syndrome (CTS) is of high clinical importance. Epidemiologic data reveals that CTS is the third most common cause of tooth loss, following caries and periodontal diseases, primarily affecting maxillary molars and premolars and mandibular molars. However, the pathogenesis of CTS is complex and multifactorial. Meanwhile the symptoms of those affected teeth are atypical. Without sufficient attention and effective treatment, the prognosis of those teeth is pessimistic and their loss by splits usually happens to middle-aged or even older persons.Cuspal inclination plays a critical part in the potential and incidence of the cracked tooth syndrome, significantly for the intact molars. It is critical to investigate an advanced method to measure the cuspal inclination and explore its bio-mechanism. As for the measurement of cuspal inclination, few studies were available both internationally as well as domestically. In this study a case-control study was conducted. 11 cracked- upper- molar dies as a case group enrolled clinically and 22 normal-upper- first-molar dies as a control group. A 3D-reconstruction measurement for cuspal inclination was used to explore the relationship between the cuspal inclination and the occurrence of CTS. A three dimensional finite element model of an intact maxillary first molar for its...