Periodontal Healing Distally to Second Mandibular Molar After Third Molar Coronectomy

Introduction: This technical note presents the autotransplantation of an impacted third molar to replace a severely damaged homolateral molar using a surgical template of the tooth to be transplanted to prepare the recipient site based on an original protocol. Technique: Mandibular molar extraction is first performed, and autotransplantation is done after 7 days. Alveolar adjustment of the receiving socket is done using a resin replica of the tooth to be transplanted; the replica is obtained using DICOM diagnosis data. The three-dimensional (3D) replica is produced using 3D printing techniques with photopolymerizable methacrylate resin. Once the recipient site is ready, the transplant is avulsed. Immediate positioning of the tooth in the new socket will save a tremendous amount of extra-alveolar time. Cross-stitch sutures are done to obtain complete restraint, and endodontic treatment is administered after 15 days. Postoperative clinical and radiographic examination showed periodontal healing after postoperative 6 months. Comments: The use of the surgical template resulted in an extra-alveolar time of below 5 s and preservation of healthy periodontal ligament cells of the donor tooth as much as possible. Conclusion: The 3D technology, from imaging to printing, can drive the improvement of prognosis in a tooth autotransplantation protocol.

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Post-natal Effect of Overexpressed DKK1 on Mandibular Molar Formation

Journal of Dental Research ◽

10.1177/0022034511421926 ◽

2011 ◽

Vol 90 (11) ◽

pp. 1312-1317 ◽

Cited By ~ 25

Author(s):

X.L. Han ◽

M. Liu ◽

A. Voisey ◽

Y.S. Ren ◽

P. Kurimoto ◽

...

Keyword(s):

Developmental Stages ◽

Formation Rate ◽

Third Molar ◽

Nestin Expression ◽

Second Molar ◽

Mandibular Molar ◽

Targeted Expression ◽

Enamel Knots ◽

Dentin Formation

Dickkopf-related protein 1 (DKK1) is a potent inhibitor of Wnt/β-catenin signaling. Dkk1-null mutant embryos display severe defects in head induction. Conversely, targeted expression of Dkk1 in dental epithelial cells leads to the formation of dysfunctional enamel knots and subsequent tooth defects during embryonic development. However, its role in post-natal dentinogenesis is largely unknown. To address this issue, we studied the role of DKK1 in post-natal dentin development using 2.3-kb Col1a1- Dkk1 transgenic mice, with the following key findings: (1) The Dkk1 transgene was highly expressed in pulp and odontoblast cells during post-natal developmental stages; (2) the 1st molar displayed short roots, an enlarged pulp/root canal region, and a decrease in the dentin formation rate; (3) a small malformed second molar and an absent third molar; (4) an increase of immature odontoblasts, few mature odontoblasts, and sharply reduced dentinal tubules; and (5) a dramatic change in Osx and nestin expression. We propose that DKK1 controls post-natal mandibular molar dentin formation either directly or indirectly via the inhibition of Wnt signaling at the following aspects: (i) post-natal dentin formation, (ii) formation and/or maintenance of the dentin tubular system, (iii) mineralization of the dentin, and (iv) regulation of molecules such as Osx and nestin.

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Orthodontic extraction of mandibular third molar to avoid nerve injury and promote periodontal healing

Journal Of Clinical Periodontology ◽

10.1111/j.1600-051x.2008.01286.x ◽

2008 ◽

Vol 35 (8) ◽

pp. 719-723 ◽

Cited By ~ 19

Author(s):

Giulio Alessandri Bonetti ◽

Serena Incerti Parenti ◽

Luigi Checchi

Keyword(s):

Nerve Injury ◽

Third Molar ◽

Mandibular Third Molar ◽

Periodontal Healing

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Cone Beam Computerized Tomography Measurement of Alveolar Ridge at Posterior Mandible for Implant Graft Estimation

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-14-00146 ◽

2015 ◽

Vol 41 (6) ◽

pp. e231-e237 ◽

Cited By ~ 3

Author(s):

Wenjian Zhang ◽

Justin Tullis ◽

Robin Weltman

Keyword(s):

Computerized Tomography ◽

Inferior Alveolar Nerve ◽

Third Molar ◽

Cone Beam ◽

Cortical Plate ◽

Alveolar Ridge ◽

Alveolar Crest ◽

Mandibular Molar ◽

Cone Beam Computerized Tomography ◽

Inferior Border

Damaging the inferior alveolar nerve (IAN) is the most serious complication when harvesting an autogenous graft from posterior mandible. The objective of this study was to use cone beam computerized tomography (CBCT) to measure dimensions of the alveolar ridge in the posterior mandible for estimation of a safe graft size, and then analyze how it is related to the gender, age, and dentition status of subjects. CBCT scans were screened to include 59 subjects without interfering pathologies. Alveolar height was measured from the alveolar crest to superior border of IAN and also to the inferior border of the mandible. Alveolar width (from buccal to lingual cortical plates) and buccal bone thickness (from buccal cortical plate to mandibular molar mesial root buccal surface) were measured at the coronal, middle, and apical thirds divided from the alveolar crest to the IAN. It was found that males and dentate sites had larger alveolar dimensions than did females and edentulous sites, respectively. Bone volume did not correlate significantly with age. Buccal bone thicknesses increased from coronal to apical and from the first to the third molar generally. A larger bone graft could be harvested from male than female patients, with a mean harvestable graft dimension (height × width in mm) for male was 15.5 × 3.2, and for female was 14.1 × 2.9. In conclusion, males and dentate arches demonstrate larger alveolar volumes than do females and edentulous regions, respectively. Larger alveolar grafts can be harvested from males compared to the females. Age does not seem to affect alveolar dimension/graft volume.

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Conservative Management of Keratocystic Odontogenic Tumors of Jaws

The Scientific World JOURNAL ◽

10.1100/2012/680397 ◽

2012 ◽

Vol 2012 ◽

pp. 1-10 ◽

Cited By ~ 17

Author(s):

Nurhan Güler ◽

Kemal Şençift ◽

Özge Demirkol

Keyword(s):

Surgical Treatment ◽

Third Molar ◽

Odontogenic Tumors ◽

Radiographic Appearance ◽

Treatment Methods ◽

Carnoy’S Solution ◽

Mandibular Molar ◽

Group 2 ◽

Histological Confirmation ◽

Keratocystic Odontogenic Tumors

Purpose. The aim of this study was to evaluate different surgical treatment methods for keratocystic odontogenic tumors (KCOTs) and the outcome of those treatments over a 9-year period.Patients and Methods. A retrospective review was performed on 43 KCOTs in 39 patients. In radiographic evaluations for diagnosis, follow ups and before and after treatment, panoramic, 3D CT and MR images were used. The three groups of different surgical treatment were (1) enucleation for small unilocular lesions without certainty of histology; (2) enucleation with Carnoy's solution, for small unilocular lesions after previous histological confirmation of KOCT; (3) marsupialization followed by enucleation with Carnoy's solution implemented for large often multilocular KCOTs with intact or destruction of cortical bone without infiltration of neighbouring tissue.Results. 43 KCOT cases were mostly localized in mandible (76.7%), radiologically unilocular (72%), and parakeratocysts (88.4%). Inflammation and satellite cysts (daughter cysts) were detected histopathologically in 14 (32.5%) and 7 (16.3%), respectively. Among the 43 cysts, 20 (46.5%) were associated with the impacted third molar and of 21 (48.8%) was in tooth bearing area, and 5 (11, 6%) located on edentulous areas. It was located mostly in the anterior region of maxilla (90%) and in mandibular molar and ramus (62.8%). The treatments of KCOTs were 18 (41.9%) for group 1, and 10 (23.3%) group 2, and 15 (34.8%) group 3. A statistically significant relationship was found between the radiographic appearance and treatment methods . No recurrence was found on months follow up.Conclusion. We concluded that successful treatment methods were enucleation and Carnoy's solution in small lesions and marsupialization in lesions that have reached a very large size, but because KCOT was observed in second decade mostly, long-term follows up are suggested.

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

10.21203/rs.3.rs-33735/v1 ◽

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

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Comparison of Alveolar Osteitis (AO) occurrence after impacted mandibular third molar removal with and without post-extraction socket irrigation

Annals of PIMS-Shaheed Zulfiqar Ali Bhutto Medical University ◽

10.48036/apims.v17i3.423 ◽

2021 ◽

Vol 17 (3) ◽

pp. 211-215

Author(s):

Fatema Awan ◽

Manahil Rahat ◽

Muhammad Jamal ◽

Saniya Sohail ◽

Khalid Mahmood Siddiqi ◽

...

Keyword(s):

Third Molar ◽

Extraction Socket ◽

Dry Socket ◽

Number Of Patients ◽

Mandibular Molar ◽

Significant Difference ◽

Alveolar Osteitis ◽

Group A ◽

Group B ◽

Mandibular Third Molars

Objective: We wanted to see whether impacted third mandibular molar extractions resulted in Alveolar Osteitis if post-extraction socket irrigation was used or not. Methodology: A randomized control experiment on 70 patients study was conducted from July 2019 to January 2020 at Islamabad Dental Hospital's OMFS department. Patients presenting with the mandibular third molars fulfilling the inclusion criteria had their teeth extracted with and without socket irrigation using the computer lottery method. In cases of dry socket, clinical diagnosis was made between the 3rd, 5th, and 7th postoperative days. Results: 70 patients/sockets were evaluated with 35 having been irrigated and 35 non-irrigated. The age range was 16-50years with a mean of 29.49 and most patients were between the 16-35 age group. There were 48.6% males and 51.4% females. Dry Socket was evaluated on the 3rd, 5th, and 7th day between groups (A=irrigation, B=Non-irrigation). On the 3rd postop day, 14 (40%) patients in group A and 15(42.9%) patients were diagnosed as dry Sockets. A similar number of patients in both groups (20%) exhibited symptoms of dry socket on the fifth and seventh postoperative days, as did 5 (14.3 %) in group A, 3 (8.6 %) in group B, and 1(2.9 %t) in group A, all on the fifth postoperative day. Conclusion: On the third, fifth, and seventh postoperative days, there was no significant difference in the result of Alveolar Osteitis between the groups.

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