scholarly journals Computer-aided three-dimensional assessment of periodontal healing distal to the mandibular second molar after coronectomy of the mandibular third molar: a prospective study

2020 ◽  
Author(s):  
Ziyu Yan ◽  
Yao Tan ◽  
Xiaoyan Xie ◽  
Wei He ◽  
Chuanbin Guo ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Third Molar ◽  
Bone Volume ◽  
Influential Factor ◽  
Three Dimensions ◽  
Bony Defect ◽  
Related Factors ◽  
Second Molar ◽  
Mandibular Second Molar ◽  
Periodontal Healing

Abstract Background The periodontal healing distal to the mandibular second molar (M2M) after coronectomy of the M3M was controversary. This study aimed to combine a digital method with cone-beam computed tomography (CBCT) and estimate periodontal healing of M2M after M3M coronectomy. An accurate and stable indicator in three dimensions was also tentatively explored. Methods Patients with a M3M in contact with the inferior alveolar canal were included. CBCT was applied immediately after coronectomy (baseline) and 6-months later. Data were investigated with digital software for registration. Previously reported and coronectomy-related factors were included for univariate and multivariate analyses. Results A total of 181 patients (213 M3Ms) completed 6-month follow-up. Significant reduction in the distal intra-bony defect (DBD) depth of the M2M was shown (1.28 ± 1.24 mm, P < 0.001). DBD depth of the M2M at baseline was the most influential factor (r = 0.59), followed by preoperative M3M condition, age, rotation and eruption of the root complex. Remaining enamel (OR = 6.93) and small retromolar space (0.67) contributed to re-contact of the root complex and M2M. Bone volume regenerated in the distal 2 mm was associated significantly with DBD-depth reduction (r = 0.74, P < 0.001). Conclusions Bone volume regenerated in the distal 2 mm of the M2M denoted stability of distal periodontal healing of the M2M. DBD depth at baseline was the most influential factor for healing of a DBD of the M2M after M3M coronectomy. The remaining enamel and a small retromolar space could contribute to re-contact of the root complex and the M2M. Trial registration: China Clinical Trial Center, ChiCTR1800014862. Registered 10 February 2018, http://www.chictr.org.cn/showproj.aspx?proj=24216

scholarly journals Computer-aided three-dimensional assessment of periodontal healing distal to the mandibular second molar after coronectomy of the mandibular third molar: a prospective study

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Z. Y. Yan ◽  
Y. Tan ◽  
X. Y. Xie ◽  
W. He ◽  
C. B. Guo ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Third Molar ◽  
Bone Volume ◽  
Influential Factor ◽  
Three Dimensions ◽  
Bony Defect ◽  
Related Factors ◽  
Second Molar ◽  
Mandibular Second Molar ◽  
Periodontal Healing

Abstract Background The periodontal healing distal to the mandibular second molar (M2M) after coronectomy of the M3M has shown controversial results. We aimed to combine a digital method with cone-beam computed tomography (CBCT) and estimate periodontal healing of M2M after M3M coronectomy. An accurate and stable indicator in three dimensions was also explored tentatively. Methods Patients with a M3M in contact with the inferior alveolar canal were included. CBCT was applied immediately after coronectomy (baseline) and 6-months later. Data were investigated with digital software for registration. Previously reported and coronectomy-related factors were included for univariate and multivariate analyses. Results A total of 181 patients (213 M3Ms) completed 6-month follow-up. Significant reduction in the distal intra-bony defect (DBD) depth of the M2M was shown (1.28 ± 1.24 mm, P < 0.001). DBD depth of the M2M at baseline was the most influential factor (r = 0.59), followed by preoperative M3M condition, age, rotation and migration of the root complex. Remaining enamel (OR = 6.93) and small retromolar space (0.67) contributed to re-contact of the root complex and M2M. Bone volume regenerated in the distal 2 mm was associated significantly with DBD-depth reduction (r = 0.74, P < 0.001). Conclusions Bone volume regenerated in the distal 2 mm of the M2M denoted stability of distal periodontal healing of the M2M. DBD depth at baseline was the most influential factor for healing of a DBD of the M2M after M3M coronectomy. The remaining enamel and a small retromolar space could contribute to re-contact of the root complex and the M2M. Trial registration China Clinical Trial Center, ChiCTR1800014862. Registered 10 February 2018,

Stability of Periodontal Healing Distal to the Mandibular Second Molar After Third Molar Coronectomy: A 3-Year Follow-Up Study

2019 ◽  
Vol 77 (2) ◽  
pp. 254-261 ◽  
Author(s):  
Elisabetta Vignudelli ◽  
Giuseppe Monaco ◽  
Maria Rosaria Antonella Gatto ◽  
Tommaso Costi ◽  
Claudio Marchetti ◽  
...  
Keyword(s):  
Third Molar ◽  
Second Molar ◽  
Follow Up Study ◽  
Mandibular Second Molar ◽  
Periodontal Healing

scholarly journals Frequency and Severity of Second Molar External Root Resorption Due to the Adjacent Third Molar and Related Factors: A Cone-Beam Computed Tomography Study

2021 ◽  
Author(s):  
Shirin Sakhdari ◽  
Sara Farahani ◽  
Ehsan Asnaashari ◽  
Sahel Marjani
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Root Resorption ◽  
Third Molar ◽  
Cone Beam ◽  
Radiology Department ◽  
Third Molars ◽  
Related Factors ◽  
Second Molar ◽  
External Root Resorption

Objective: This study sought to assess the frequency and severity of second molar external root resorption (ERR) due to the adjacent third molar and its correlation with the position of third molar and other related factors using cone-beam computed tomography (CBCT). Materials and Methods: This cross-sectional study evaluated 320 second molars and their adjacent impacted third molars on CBCT scans of patients over 16 years, retrieved from the archives of Azad University Radiology Department. Presence/absence of second molar ERR, its location and severity (if present), and position of adjacent third molar were determined on CBCT scans, and recorded in a checklist. Data were analyzed using a logistic regression model. Results: The frequency of second molar ERR was 33.4% in the mandible and 14% in the maxilla. The severity of ERR was significantly correlated with the involved jaw (P=0.001) but had no correlation with age, gender, or depth of impaction of adjacent third molar (P>0.05). The mesioangular and horizontal positions of impacted third molars had a significant correlation with the frequency of second molar ERR (P<0.006). Conclusion: According to the results of this study, ERR occurring in second molars adjacent to third molars is common, especially in the mandible. Mesially inclined third molars have a greater potential of being associated with ERR in second molars.

Mandibular Second Molar Periodontal Parameters after Surgical Extraction of Adjacent Impacted Third Molar

2016 ◽  
Vol 5 (3) ◽  
pp. 1-4
Author(s):  
Majid Fereidooni ◽  
Oveis Khakbaz ◽  
Najme Danesh Alukande ◽  
Soraya Khafri ◽  
◽  
...  
Keyword(s):  
Third Molar ◽  
Second Molar ◽  
Impacted Third Molar ◽  
Surgical Extraction ◽  
Mandibular Second Molar

scholarly journals Identification and Endodontic Management of Middle Mesial Canal in Mandibular Second Molar Using Cone Beam Computed Tomography

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Bonny Paul ◽  
Kavita Dube
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Digital Radiography ◽  
Cone Beam Computed Tomography ◽  
Three Dimensional ◽  
Cone Beam ◽  
Two Dimensional ◽  
Second Molar ◽  
Two Dimensional Image ◽  
Mandibular Second Molar

Endodontic treatments are routinely done with the help of radiographs. However, radiographs represent only a two-dimensional image of an object. Failure to identify aberrant anatomy can lead to endodontic failure. This case report presents the use of three-dimensional imaging with cone beam computed tomography (CBCT) as an adjunct to digital radiography in identification and management of mandibular second molar with three mesial canals.

Sign in / Sign up

Export Citation Format

Share Document