Impact of mandibular third molars on angle fractures: A retrospective study

Abstract

Fractures of the mandible occur more often than the other facial bones even though the mandible is considered to be one of the strongest and most rigid bones of the facial skeleton. 1 According to Killey and Rowe, mandibular fractures comprise between 40% and 65% of all facial fractures and angle fractures are involved in 25-33% of such fractures. 2,3 Patterns of fracture depend on multiple factors such as the size, direction, nature and surface area of the impacting force, and the biomechanical characteristics of the mandible such as bone density, mass, normal, or pathologic anatomic structures. 4,5 Huelke reported that the relationship between fracture location and the presence of a tooth-bearing area is significant. 6

A finite element analysis on the indication for extracting partially impacted mandibular third molars considering mandibular trauma

“…Our models and results elucidate how the removal of M3s can increase the short-term risk of angle fractures, aligning with clinical observations. The findings of this study indicate that the presence of lower M3 may increase the likelihood of mandibular angle fractures, while the extraction of incompletely erupted mandibular M3 can decrease the probability of mandibular angle fractures, consistent with previous research [28,30,37]. Fractures in the mandibular angle region are influenced by many factors such as the retromolar space, perimeter of the cross-section just proximal to the second molar, breadth of the ramal cross-section, thickness of the oblique ridge, transgonial angle, location of the ipsilateral mental foramen, and occlusal support [38][39][40][41][42].…”

A finite element analysis on the indication for extracting partially impacted mandibular third molars considering mandibular trauma

“…Our models and results elucidate how the removal of M3s can increase the short-term risk of angle fractures, aligning with clinical observations. The findings of this study indicate that the presence of lower M3 may increase the likelihood of mandibular angle fractures, while the extraction of incompletely erupted mandibular M3 can decrease the probability of mandibular angle fractures, consistent with previous research [28,30,37]. Fractures in the mandibular angle region are influenced by many factors such as the retromolar space, perimeter of the cross-section just proximal to the second molar, breadth of the ramal cross-section, thickness of the oblique ridge, transgonial angle, location of the ipsilateral mental foramen, and occlusal support [38][39][40][41][42].…”

Impact of Mandibular Third Molar Impaction, Extraction History, and Deleterious Oral Habits on Angle Fractures: A Retrospective Study in Western Rajasthan

“…Treatment Outcomes and Complications in Angle Fractures This aligns with Lee and Dodson (2000)[22] andKandel et al (2020) [2], who reported ORs of 2.8-9.0, attributing the risk to reduced cortical bone thickness and stress concentration[4,7].…”

Immediate Autotransplantation of Mature Third Molars to Bilateral Mandibular First Molars With Large Periapical Lesions: A Case Report

“…Andreasen [16] reported that 80% of the cases presented normal periodontal ligament healing when extra‐oral times were limited to within 18 min. The application of 3D‐printed replicas increases the ease of surgery, and the extra‐oral time can be reduced to within 1 min, significantly increasing the success rate of ATT [2, 6, 7, 15]. With the guidance of 3D‐printed replicas, the extra‐oral time of both donor teeth in our case was less than 1 min; we believe that the success of this case was closely related to the extremely short extra‐oral time of the donor teeth.…”

A finite element analysis on the indication for extracting partially impacted mandibular third molars considering mandibular trauma

“…Our models and results elucidate how the removal of M3s can increase the short-term risk of angle fractures, aligning with clinical observations. The findings of this study indicate that the presence of lower M3 may increase the likelihood of mandibular angle fractures, while the extraction of incompletely erupted mandibular M3 can decrease the probability of mandibular angle fractures, consistent with previous research [28,30,37]. Fractures in the mandibular angle region are influenced by many factors such as the retromolar space, perimeter of the cross-section just proximal to the second molar, breadth of the ramal cross-section, thickness of the oblique ridge, transgonial angle, location of the ipsilateral mental foramen, and occlusal support [38][39][40][41][42].…”

Impact of Mandibular Third Molar Impaction, Extraction History, and Deleterious Oral Habits on Angle Fractures: A Retrospective Study in Western Rajasthan

“…Treatment Outcomes and Complications in Angle Fractures This aligns with Lee and Dodson (2000)[22] andKandel et al (2020) [2], who reported ORs of 2.8-9.0, attributing the risk to reduced cortical bone thickness and stress concentration[4,7].…”

Immediate Autotransplantation of Mature Third Molars to Bilateral Mandibular First Molars With Large Periapical Lesions: A Case Report

“…Andreasen [16] reported that 80% of the cases presented normal periodontal ligament healing when extra‐oral times were limited to within 18 min. The application of 3D‐printed replicas increases the ease of surgery, and the extra‐oral time can be reduced to within 1 min, significantly increasing the success rate of ATT [2, 6, 7, 15]. With the guidance of 3D‐printed replicas, the extra‐oral time of both donor teeth in our case was less than 1 min; we believe that the success of this case was closely related to the extremely short extra‐oral time of the donor teeth.…”

A finite element analysis on the indication for extracting partially impacted mandibular third molars considering mandibular trauma

“…Our models and results elucidate how the removal of M3s can increase the short-term risk of angle fractures, aligning with clinical observations. The findings of this study indicate that the presence of lower M3 may increase the likelihood of mandibular angle fractures, while the extraction of incompletely erupted mandibular M3 can decrease the probability of mandibular angle fractures, consistent with previous research [28,30,37]. Fractures in the mandibular angle region are influenced by many factors such as the retromolar space, perimeter of the cross-section just proximal to the second molar, breadth of the ramal cross-section, thickness of the oblique ridge, transgonial angle, location of the ipsilateral mental foramen, and occlusal support [38][39][40][41][42].…”

Impact of Mandibular Third Molar Impaction, Extraction History, and Deleterious Oral Habits on Angle Fractures: A Retrospective Study in Western Rajasthan

“…Treatment Outcomes and Complications in Angle Fractures This aligns with Lee and Dodson (2000)[22] andKandel et al (2020) [2], who reported ORs of 2.8-9.0, attributing the risk to reduced cortical bone thickness and stress concentration[4,7].…”

Immediate Autotransplantation of Mature Third Molars to Bilateral Mandibular First Molars With Large Periapical Lesions: A Case Report

“…Andreasen [16] reported that 80% of the cases presented normal periodontal ligament healing when extra‐oral times were limited to within 18 min. The application of 3D‐printed replicas increases the ease of surgery, and the extra‐oral time can be reduced to within 1 min, significantly increasing the success rate of ATT [2, 6, 7, 15]. With the guidance of 3D‐printed replicas, the extra‐oral time of both donor teeth in our case was less than 1 min; we believe that the success of this case was closely related to the extremely short extra‐oral time of the donor teeth.…”