scholarly journals Contribution of three-dimensional images in the planning of cementoblastoma resection

2021 ◽  
pp. 20200156
Author(s):  
Stefaan Van Hoe ◽  
Eman Shaheen ◽  
Karla de Faria Vasconcelos ◽  
Joseph Schoenaers ◽  
Constantinus Politis ◽  
...  

Cementoblastomas are rare benign tumours that represent less than 1% of all odontogenic tumours. Complete resection is mandatory to avoid recurrence. This case report describes the contribution of three-dimensional imaging and three-dimensional printing in the pre-operative surgical planning of a large cementoblastoma that not only caused substantial compression on the inferior alveolar and mental nerves, but also caused thinning and partial erosion of the lingual and vestibular cortical bone, thus increasing the risk of pre-operative mandibular fracture.

2019 ◽  
Vol 43 (5) ◽  
pp. 343-347 ◽  
Author(s):  
Pinar Cevik ◽  
Mustafa Kocacikli

Purpose: Patients with maxillofacial deformities always seek for aesthetic prosthesis. Recently, three-dimensional printing technologies have been used for dental treatments on such patients. Case report: A 24-year-old man reported to the Department of Prosthodontics for replacement of his missing right ear induced by a trauma. A magnet-retained auricular prosthesis was planned for the patient. Three-dimensional scanning was performed on the healthy side by using a three-dimensional optical scanner and the data were mirrored. The mirrored image was then imported to a software and a virtual model of the future prosthesis was obtained for the defect side. A three-dimensional printer was used to fabricate a negative mold for the mirrored image by using additive manufacturing. Initially, an impression of the defect side was made; then, the cast model was obtained in a dental flask. Magnets of the prosthesis were inserted to the acrylic resin framework on the cast model. Room temperature vulcanized silicone elastomer was mixed and poured into the three-dimensionally fabricated mold. Then, the flask was placed over the negative mold firmly. After polymerization of the silicone, the auricular prosthesis was delivered to the patient and the patient was instructed to clean the prosthesis daily. Conclusions: Three-dimensional printing technology was used for the fabrication of the patient’s missing ear. This method eliminated the conventional laboratory steps and reduced the number of stages of the fabrication of a silicone prosthesis. The negative mold of the defect side allowed us a direct fabrication of the silicone prosthesis without a need for waxing or flasking procedures.


2022 ◽  
Vol 14 (1) ◽  
pp. 32-39
Author(s):  
Sachit Anand ◽  
Nellai Krishnan ◽  
Prabudh Goel ◽  
Anjan Kumar Dhua ◽  
Vishesh Jain ◽  
...  

Background: In cases with solid tumors, preoperative radiological investigations provide valuable information on the anatomy of the tumor and the adjoining structures, thus helping in operative planning. However, due to a two-dimensional view in these investigations, a detailed spatial relationship is difficult to decipher. In contrast, three-dimensional (3D) printing technology provides a precise topographic view to perform safe surgical resections of these tumors. This systematic review aimed to summarize and analyze current evidence on the utility of 3D printing in pediatric extra-cranial solid tumors. Methods: The present study was registered on PROSPERO—international prospective register of systematic reviews (registration number: CRD42020206022). PubMed, Embase, SCOPUS, and Google Scholar databases were explored with appropriate search criteria to select the relevant studies. Data were extracted to study the bibliographic information of each article, the number of patients in each study, age of the patient(s), type of tumor, organ of involvement, application of 3D printing (surgical planning, training, and/or parental education). The details of 3D printing, such as type of imaging used, software details, printing technique, printing material, and cost were also synthesized. Results: Eight studies were finally included in the systematic review. Three-dimensional printing technology was used in thirty children with Wilms tumor (n = 13), neuroblastoma (n = 7), hepatic tumors (n = 8), retroperitoneal tumor (n = 1), and synovial sarcoma (n = 1). Among the included studies, the technology was utilized for preoperative surgical planning (five studies), improved understanding of the surgical anatomy of solid organs (two studies), and improving the parental understanding of the tumor and its management (one study). Computed tomography and magnetic resonance imaging were either performed alone or in combination for radiological evaluation in these children. Different types of printers and printing materials were used in the included studies. The cost of the 3D printed models and time involved (range 10 h to 4–5 days) were reported by two studies each. Conclusions: 3D printed models can be of great assistance to pediatric surgeons in understanding the spatial relationships of tumors with the adjacent anatomic structures. They also facilitate the understanding of families, improving doctor–patient communication.


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