Tag Archives | second molar

Do Mesial Angled Wisdom Teeth Cause Problems to Adjacent Second Molars

An interesting article titled “Mesial Inclination of Impacted Third Molars and Its Propensity to Stimulate External Root Resorption in Second Molars—A Cone-Beam Computed Tomographic Evaluation” written by Anne Caroline Costa Oenning and et al. appears in the 2015 Journal of Oral and Maxillofacial Surgery (vol. 73, pp. 379-386). The authors explore cone-beam computed tomography (CBCT) scans to look at the teeth in the mouth. They look at the  presence of external root resorption (ERR) in second molars adjacent to horizontally and mesioangular impacted mandibular wisdom teeth. Unlike cavities, ERR is usually asymptomatic and aseptic, unless the pulp cavity has been involved or the lesion has been secondarily infected. Literature attributes the occurrence of this resorption to pressure from an adjacent impacted tooth. This pressure can activate clastic cells responsible for triggering resorption. Studies of periapical and panoramic radiographs have looked at the presence of ERR in second molars adjacent to impacted wisdom teeth. Most of these studies have reported a low prevalence of ERR in second molars ranging from 0.3% to 7%. Even so  cone-beam computed tomographic images have been compared with with panoramic images and the detection of ERR on second molars was found to 4.3 times greater with […]

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Effect of Eruption Status of the Mandibular Wisdom Teeth on Distal Caries in the Adjacent Second Molar

An article titled “Effect of Eruption Status of the Mandibular Third Molar on Distal Caries in the Adjacent Second Molar,” written by Feiwu Kang and et. al. appears in  the 2016 issue of J Oral Maxillofac Surg. The article explores the eruption of mandibular wisdom teeth and their effect on adjacent second molars. A total of 500 cone beam computed tomography (CBCT) images of mandibular third molar (MTMs) from 469 patients were evaluated. The authors assessed the presence of distal caries in mandibular second molars (MSMs), impaction depths and angulations of MTMs, cementoenamel junction (CEJ) distances between distal MSMs and mesial MTMs, presence of pericoronitis in MTMs, and patient characteristics (age and gender). The authors state that previous studies show the prevalence of distal caries in MSMs has ranged from 13.4 to 30.1%. The authors found that the overall prevalence of distal caries in the mandibular second molars was 52.0%. According to the classification of Pell and Gregory, position A was the impaction depth at which most distal caries in MSMs were present (P= .036). For angulation of the mandibular third molars, when mesial angulations were 43 to 73%, MSMs developed more distal caries (P < .0001). Previous studies have reported that […]

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Removing Wisdom Teeth May Improve The Periodontal Health of Remaining Teeth

An interesting article titled “Removal of Symptomatic Third Molars May Improve Periodontal Status of Remaining Dentition,” by Carolyn Dicus-Brookes and et al. appears in the Journal of Oral and Maxillofacial Surgery (vol. 71, pp. 1639-1646, 2013). The article seeks to explore the impact of removing wisdom teeth on the periodontal status of adjacent second molars and other teeth located in the mouth specifically for patients who have mild symptoms of pericoronitis. As discussed recently over at Upcoming Changes to JOMS and AAOMS in 2014, select articles in JOMS will have press releases written by AAOMS staff to accompany them. This is one of those articles so that feature appears to have already been rolled out. To get an idea of what the press release entails I will briefly describe it. It is very short (less than 10 sentences) and fits on 1 page. It was released on October 1, 2013. The press release states 69 patients were followed with mild symptoms of pericoronitis. All patients had wisdom teeth prior to the study start and had an average age of 21. The main conclusion of the study as stated in the press release, is that at the beginning of the study […]

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Association Between Partially Erupted Mandibular Third Molar and Caries in Distal Second Molar

An interesting article titled “Association between the presence of a partially erupted mandibular third molar and the existence of caries in the distal of the second molars,” appears in the International Journal of Oral and Maxilofacial Surgery by S. G. M. Falci and et. al. (October 2012, pp. 1270-1274). The article mentions how previous studies have shown that caries on the mandibular second molar due to the presence of partially erupted third molars has varied between 7% and 32%. The article criticizes prior work where studies based their prevalence data on panoramic radiographs which is not as good as periapical radiographs when diagnosing caries. The authors state “The lack of sample characterization, the absence of sample calculation, the deficient or inadequate statistical analysis and the absence of a description of the eligibility criteria, discredits the scientific evidence of these previous studies.” The authors performed an aprior sample size calculation and determined they needed 246 radiographs for adequate statistical type I and type II errors I presume. Some key findings are found in the results section of the paper. The authors state “The univariate logistical regression analysis showed that male patients, and patients aged 23–57 years, are the most likely to […]

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