Marques José, Montserrat-Bosch Marta, Figueiredo Rui, Vilchez-Pérez Miguel-Angel, Valmaseda-Castellón Eduard, Gay-Escoda Cosme
DDS, MS. Master of Oral Surgery and Implantology. Professor of the Oral Surgery and Implantology Master's Degree program. School of Dentistry, University of Barcelona (Spain).
DDS. Master of Oral Surgery and Implantology. School of Dentistry, University of Barcelona. Barcelona (Spain).
J Clin Exp Dent. 2017 Jun 1;9(6):e794-e798. doi: 10.4317/jced.53919. eCollection 2017 Jun.
The objective of this study was to evaluate the association between the presence of mandibular third molars and the occurrence of carious lesions in the distal aspect of the mandibular second molar.
A retrospective cohort study comprising 327 lower third molars extracted in the Oral Surgery and Implantology Master's Degree program of the School of Dentistry of the University of Barcelona (Barcelona, Spain) was carried out. A descriptive and bivariate analysis was made. The diagnosis of caries in the second molar and the position of the mandibular third molar were evaluated through panoramic radiographies.
The sample included 203 patients, 94 males (46.3%) and 109 females (53.7%), with a mean age of 26,8 years and 327 lower third molars. The prevalence of second molar distal caries was 25.4% (95% CI= 20.6% to 30.2%). This pathology was significantly more frequent when the third molar was in a horizontal position (27.7%), when the contact point was at (45,8%) or below (47.0%) the cementoenamel junction (CEJ), and when the distal CEJ of the mandibular second molar and the mesial CEJ of the third molar was 7 to 12 mm apart.
Horizontal lower third molars with contact points at or below the CEJ are more likely to produce distal caries in the mandibular second molars. Due to the high prevalence of this pathology (20.6% to 30.2%), a prophylactic removal of lower third molars with the above-mentioned features might be advisable. Second molar, caries, third molar, prophylactic removal.
本研究的目的是评估下颌第三磨牙的存在与下颌第二磨牙远中面龋损发生之间的关联。
开展了一项回顾性队列研究，纳入了巴塞罗那大学牙科学院口腔外科与种植硕士学位项目中拔除的327颗下颌第三磨牙。进行了描述性和双变量分析。通过全景X线片评估第二磨牙的龋病诊断以及下颌第三磨牙的位置。
样本包括203例患者，94例男性（46.3%）和109例女性（53.7%），平均年龄26.8岁，共327颗下颌第三磨牙。第二磨牙远中面龋的患病率为25.4%（95%CI = 20.6%至30.2%）。当第三磨牙处于水平位（27.7%）、接触点位于釉牙骨质界（CEJ）及以下（45.8%）或在其下方（47.0%）以及下颌第二磨牙远中CEJ与第三磨牙近中CEJ相距7至12mm时，这种病变明显更常见。
接触点位于CEJ及以下的水平位下颌第三磨牙更有可能在下颌第二磨牙产生远中面龋。鉴于这种病变患病率较高（20.6%至30.2%），对于具有上述特征的下颌第三磨牙，预防性拔除可能是可取的。第二磨牙、龋病、第三磨牙、预防性拔除。
