scholarly journals Transplant surgical templates for dental autotransplantation: a technical note

2019 ◽  
Vol 25 (3) ◽  
pp. 25
Author(s):  
Louise Tavennec ◽  
Pierre-Alexandre Chataigner ◽  
Olivier Sorel ◽  
Victor Fau
Keyword(s):  
Three Dimensional ◽  
Third Molar ◽  
Technical Note ◽  
Radiographic Examination ◽  
Periodontal Ligament Cells ◽  
Recipient Site ◽  
Surgical Template ◽  
Mandibular Molar ◽  
Tremendous Amount ◽  
Periodontal Healing

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.

scholarly journals Periodontal Healing Distally to Second Mandibular Molar After Third Molar Coronectomy

2017 ◽  
Vol 75 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Elisabetta Vignudelli ◽  
Giuseppe Monaco ◽  
Maria Rosaria Antonella Gatto ◽  
Simonetta Franco ◽  
Claudio Marchetti ◽  
...  
Keyword(s):  
Third Molar ◽  
Mandibular Molar ◽  
Periodontal Healing

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

Tooth autotransplantation part 3: surgical planning and technique

2019 ◽  
Vol 12 (4) ◽  
pp. 126-133
Author(s):  
Hani Nazzal ◽  
Sophy Barber ◽  
Zynab Jawad ◽  
Nadine Houghton ◽  
Monty Duggal
Keyword(s):  
Surgical Procedure ◽  
Surgical Planning ◽  
Periodontal Ligament Cells ◽  
Careful Planning ◽  
Recipient Site ◽  
Tooth Transplantation ◽  
Case Selection ◽  
Atraumatic Extraction ◽  
Operative Assessment ◽  
Periodontal Healing

The practical aspects of pre-operative assessment and surgical procedure for autotransplantation are discussed in this part of the series. The success of tooth transplantation is dependent on case selection, careful planning and a surgical procedure that maintains viable periodontal ligament cells and intact cementum of the transplanted teeth. A thorough assessment of the donor tooth and recipient site is vital for successful planning and execution of tooth autotransplantation. The surgical procedure involves atraumatic extraction of the donor tooth, socket preparation and splinting of the transplanted tooth. Post-surgical procedures include monitoring of pulp and periodontal healing and restorative camouflage of the donor tooth. CPD/Clinical Relevance: Surgical planning and procedures are vital to the success of autotransplantation. Orthodontists should be aware of these factors and bear them in mind when preparing patients for autotransplantation to optimize surgical success.

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,

scholarly journals Tooth autotransplantation of the mandibular third molar: A case report

2021 ◽  
pp. 166-170
Keyword(s):  
Third Molar ◽  
Radiographic Examination ◽  
Viable Option ◽  
Root Canal Therapy ◽  
Recipient Site ◽  
Second Molar ◽  
The Third ◽  
Satisfactory Outcome ◽  
Mandibular Third Molar ◽  
Mandibular Second Molar

Autotransplantation is a viable option for treating teeth with severe decay when a donor tooth is available. Our case was a 29-year-old female that her mandibular second molar was non restorable due to extensive root caries. After extraction of mandibular second molar, the mandibular third molar was reimplanted into the recipient site. Root canal therapy was done for the third molar after two weeks.After15 months, clinical and radiographic examination revealed satisfactory outcome with no signs or symptoms suggestive of pathology.

scholarly journals PREDICTION OF EXTRACTION DIFFICULTY FOR INFERIOR THIRD MOLAR

InterConf ◽  
2021 ◽  
pp. 273-278
Author(s):  
Gabriela Motelica ◽  
Nicolae Chele ◽  
Sergiu Beliniuc
Keyword(s):  
Medical Records ◽  
Third Molar ◽  
Radiographic Examination ◽  
Common Complication ◽  
Correct Position ◽  
Anatomical Structures ◽  
Second Molar ◽  
Mandibular Third Molar ◽  
Mandibular Molar ◽  
The University

Inferior third molar impaction remains an actual topic of discussion in modern dentistry due to the frequent complications and treatment contraindications. According to Rock and Elsey inferior third mandibular molar impaction occurs in 73% of young people. Many theories of impaction of inferior 3rd molar have been proposed, but the most popular is the insufficient development of retromolar space. Some authors claim that M3 extraction should only be performed when complications may occur, others say that M3 should be extracted if there are no contraindications, but Martin Kunkel is the advocate of the prophylactic extraction of the inferior third molar. In order to achieve the proposed goal, the frequency of impaction of mandibular third molar and their relationship with neighboring anatomical structures was evaluated. There were statistically processed data of medical records and radiographic examination. This study was made based on 320 patients treated in the University Dental Clinic nr.2, SUMPh ,,Nicolae Testemițanu”. Of these, 147 patients were selected: 58 patients with impacted inferior 3rd molar and 89 patients with inferior 3rd molar apparently erupted in the correct position. The most common complication caused by M3 was pericoronitis, followed by second molar caries.

An innovative prone positioning system for advanced deformity and frailty in complex spine surgery

2020 ◽  
Vol 32 (2) ◽  
pp. 229-234
Author(s):  
Benjamin Kolb ◽  
John Large ◽  
Stuart Watson ◽  
Glyn Smurthwaite
Keyword(s):  
Ankylosing Spondylitis ◽  
Three Dimensional ◽  
Technical Note ◽  
Positioning System ◽  
Prone Positioning ◽  
Economic Implications ◽  
Potential Safety ◽  
Chest Deformity ◽  
Positioning Device ◽  
Skin Quality

The authors present a technical note for a prone positioning system developed to facilitate cervical extension osteotomy for ankylosing spondylitis in the presence of severe deformity and frailty. Chin-on-chest deformity represents one of the most debilitating changes of ankylosing spondylitis. Where the chin-brow angle approaches or exceeds 90°, prone positioning becomes problematic due to the fixed position of the head. Furthermore, the challenge is compounded where physiological deconditioning leads to frailty, and the side effects of medical therapies decrease muscle mass and skin quality. Conventional prone positioning equipment is not able to cater to all patients. A versatile system was developed using a 3D reconstruction to enable a positioning simulation and verification tool. The tool was used to comprehensively plan the perioperative episode, including spatial orientation and associated equipment. Three-dimensional printing was used to manufacture a bespoke positioning device that precisely matched the contours of the patient, reducing contact pressure and risk of skin injury. The authors were able to safely facilitate surgery for a patient whose deformity and frailty may otherwise have precluded this possibility. The system has potential safety and economic implications that may be of significant utility to other institutions engaging in complex spinal surgery.

Design and fabrication of anisotropic textile brace for exerting corrective forces on spinal curvature

2021 ◽  
pp. 152808372110326
Author(s):  
Queenie Fok ◽  
Joanne Yip ◽  
Kit-lun Yick ◽  
Sun-pui Ng
Keyword(s):  
Medical Condition ◽  
Three Dimensional ◽  
Case Series ◽  
The Body ◽  
Spinal Curvature ◽  
Radiographic Examination ◽  
Interface Pressure ◽  
Pressure System ◽  
Case Series Study ◽  
Point Pressure

This study focuses on the fabrication of an anisotropic textile brace that exerts corrective forces based on the three-point pressure system to treat scoliosis, which is a medical condition that involves deformity of the spine. The design and material properties of the proposed anisotropic textile brace are discussed in detail here. A case series study with 5 scoliosis patients has been conducted to investigate the immediate in-brace effect and biomechanics of the proposed brace. Radiographic examination, three-dimensional scanning of the body and interface pressure measurements have been used to evaluate the immediate effect of the proposed brace on reducing the spinal curvature and asymmetry of the body contours and its biomechanics. The results show that the proposed brace on average reduces the spinal curvature by 11.7° and also increases the symmetry of the posterior trunk by 14.1% to 43.2%. The interface pressure at the corrective pad ranges from 6.0 to 24.4 kPa. The measured interface pressure shows that a sufficient amount of pressure has been exerted and a three-point pressure distribution is realized to reduce the spinal curvature. The obtained results indicate the effectiveness of this new approach which uses elastic textile material and a hinged artificial backbone to correct spinal deformity.

Three‐dimensional printed model of impacted third molar for surgical extraction training

2021 ◽  
Author(s):  
Jing Feng ◽  
Wenting Qi ◽  
Shengfeng Duan ◽  
Chongyun Bao ◽  
Xiaohui Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Third Molar ◽  
Impacted Third Molar ◽  
Surgical Extraction

scholarly journals Infected Dentigerous Cyst of Maxillary Sinus Arising from an Ectopic Third Molar

2013 ◽  
Vol 3 ◽  
pp. 7 ◽  
Author(s):  
Yadavalli Guruprasad ◽  
Dinesh Singh Chauhan ◽  
Umashankar Kura
Keyword(s):  
Maxillary Sinus ◽  
Rare Case ◽  
Dentigerous Cyst ◽  
Third Molar ◽  
Radiographic Examination ◽  
Palpable Mass ◽  
Follicular Cyst ◽  
Pathologic Features ◽  
Dentigerous Cysts ◽  
Ectopic Third Molar

A dentigerous cyst or follicular cyst is a form of odontogenic cyst. It is believed that it forms during the development of the tooth and is associated with pressure exerted by the crown of an unerupted (or partially erupted) tooth on the fluid within the follicular space. Typically, dentigerous cysts are painless and discovered during routine radiographic examination. However, they may be large and result in a palpable mass. Additionally, as they grow they displace adjacent teeth. They almost exclusively occur in permanent dentition. The cyst is lined by stratified squamous non-keratinizing epithelium. About 70% of dentigerous cysts occur in the mandible and 30% in the maxilla. Dentigerous cysts associated with ectopic teeth within the maxillary sinus are very rare. We report radiologic and pathologic features in a rare case of infected dentigerous cyst of maxillary sinus arising from an ectopic third molar in a 21-year-old female patient.

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