BACKGROUND Extraction of impacted third molars often leads to severe complications caused by damage to the inferior alveolar nerve(IAN).AIM To proposes a method for the partial grinding of an impacted mandibular third...BACKGROUND Extraction of impacted third molars often leads to severe complications caused by damage to the inferior alveolar nerve(IAN).AIM To proposes a method for the partial grinding of an impacted mandibular third molar(IMM3)near the IAN to prevent IAN injury during IMM3 extraction.METHODS Between January 1996 and March 2022,25 patients with IMM3 roots near the IAN were enrolled.The first stage of the operation consisted of grinding a major part of the IMM3 crown with a high-speed turbine dental drill to achieve sufficient space between the mandibular second molar and IMM3.After 6 months,when the root tips were observed to be away from the IAN on X-ray examination,the remaining part of the IMM3 was completely removed.RESULTS All IMM3s were extracted easily without symptoms of IAN injury after extraction.CONCLUSION Partial IMM3 grinding may be a good alternative treatment option to avoid IAN injury in high-risk cases.展开更多
Objective:The aim of this prospective study was to investigate radiologic and clinical factors associated with root fracture during the removal of impacted mandibular third molars.Methods:A total of 91 patients who re...Objective:The aim of this prospective study was to investigate radiologic and clinical factors associated with root fracture during the removal of impacted mandibular third molars.Methods:A total of 91 patients who required 91 surgical extractions of impacted mandibular third molars from November 2013 to October 2014 were involved in the study.Radiologic and clinical data were taken preoperatively as well as intraoperatively.All surgical procedures were performed under the same conditions and by the different surgeons who were unaware of the data collected in the pre-selection phase.Either Pearson's chi-square test or Fisher's exact test was used for the data analysis.Results:Among these 91 patients with impacted mandibular third molars,root fractures were seen in 12 patients(13.1%)during the surgical interventions.There were a highly significant increase in the incidence associated with increasing patient's age(P〈0.05),depth of impaction(P〈0.05),number of roots(P〈0.05)and surgeon's experience(P〈0.05).For the multi-rooted tooth,the incidence of root fracture was associated with extraction method(root not split)(P〈0.05).Statistical analyses revealed that the root fracture was unrelated to the other variables.Conclusion:Major risk factors closely associated with the increase incidence of surgical difficulties and intraoperative root fracture,during the surgical removal of impacted mandibular third molars,are patient's age,depth of impaction,surgeon's experience,number of roots and extraction methods.展开更多
Kissing molars (KMs), first reported by Van Hoof in 1973, refer to molars with occlusal surfaces that contact each other in a single follicular space while their roots extend in opposite directions. This is a case of ...Kissing molars (KMs), first reported by Van Hoof in 1973, refer to molars with occlusal surfaces that contact each other in a single follicular space while their roots extend in opposite directions. This is a case of a 20-year-old male who presented with complaints of right mandibular molar pain with cold water contact and occlusion. Panoramic and cone-beam computed tomography (CBCT) images revealed impaction of the right mandibular third and fourth molars, with the occlusal surfaces contacting each other while the roots extended in opposite directions. KMs are classified according to the impaction of the mandibular first and second molars (Class I), second and third molars (Class II), and third and fourth molars (Class III). Our patient was considered Class III. Given the patient’s preference for surgical treatment, successful teeth extraction and extirpation were performed under intravenous sedation. The patient’s postoperative course was unremarkable. We describe a case of KMs Class III with a cystic variant assessed by panoramic and CBCT images. We additionally review all KMs Class III reported in the literature.展开更多
文摘BACKGROUND Extraction of impacted third molars often leads to severe complications caused by damage to the inferior alveolar nerve(IAN).AIM To proposes a method for the partial grinding of an impacted mandibular third molar(IMM3)near the IAN to prevent IAN injury during IMM3 extraction.METHODS Between January 1996 and March 2022,25 patients with IMM3 roots near the IAN were enrolled.The first stage of the operation consisted of grinding a major part of the IMM3 crown with a high-speed turbine dental drill to achieve sufficient space between the mandibular second molar and IMM3.After 6 months,when the root tips were observed to be away from the IAN on X-ray examination,the remaining part of the IMM3 was completely removed.RESULTS All IMM3s were extracted easily without symptoms of IAN injury after extraction.CONCLUSION Partial IMM3 grinding may be a good alternative treatment option to avoid IAN injury in high-risk cases.
基金National natural science foundation of China(81271110)National science and technology support program(2014BAIO4B07)
文摘Objective:The aim of this prospective study was to investigate radiologic and clinical factors associated with root fracture during the removal of impacted mandibular third molars.Methods:A total of 91 patients who required 91 surgical extractions of impacted mandibular third molars from November 2013 to October 2014 were involved in the study.Radiologic and clinical data were taken preoperatively as well as intraoperatively.All surgical procedures were performed under the same conditions and by the different surgeons who were unaware of the data collected in the pre-selection phase.Either Pearson's chi-square test or Fisher's exact test was used for the data analysis.Results:Among these 91 patients with impacted mandibular third molars,root fractures were seen in 12 patients(13.1%)during the surgical interventions.There were a highly significant increase in the incidence associated with increasing patient's age(P〈0.05),depth of impaction(P〈0.05),number of roots(P〈0.05)and surgeon's experience(P〈0.05).For the multi-rooted tooth,the incidence of root fracture was associated with extraction method(root not split)(P〈0.05).Statistical analyses revealed that the root fracture was unrelated to the other variables.Conclusion:Major risk factors closely associated with the increase incidence of surgical difficulties and intraoperative root fracture,during the surgical removal of impacted mandibular third molars,are patient's age,depth of impaction,surgeon's experience,number of roots and extraction methods.
文摘Kissing molars (KMs), first reported by Van Hoof in 1973, refer to molars with occlusal surfaces that contact each other in a single follicular space while their roots extend in opposite directions. This is a case of a 20-year-old male who presented with complaints of right mandibular molar pain with cold water contact and occlusion. Panoramic and cone-beam computed tomography (CBCT) images revealed impaction of the right mandibular third and fourth molars, with the occlusal surfaces contacting each other while the roots extended in opposite directions. KMs are classified according to the impaction of the mandibular first and second molars (Class I), second and third molars (Class II), and third and fourth molars (Class III). Our patient was considered Class III. Given the patient’s preference for surgical treatment, successful teeth extraction and extirpation were performed under intravenous sedation. The patient’s postoperative course was unremarkable. We describe a case of KMs Class III with a cystic variant assessed by panoramic and CBCT images. We additionally review all KMs Class III reported in the literature.
