Comparison of the superimposition accuracy in the integration of different digital dental models into the cone-beam computed tomography: An ex vivo study DA. Marlière, MJ. Calori, L. Asprino Medicina Oral Patologia Oral Y Cirugia Bucal, 2026 BACKGROUND: Accurate virtual planning for orthognathic surgery and dental implants requires integrating cone-beam computed tomography (CBCT) images into digital dental models, but the impact of different scanning methods on the superimposition accuracy remains unclear. The aim of this study was to compare the superimposition accuracy of dental models obtained from two scanning methods using CBCT scans of dental surfaces. MATERIAL AND METHODS: The maxilla (MX) and mandible (MD) of 4 dry skulls were scanned using CBCT and converted into 3D meshes. Dental arches were obtained using intraoral devices (IS) and by digitizing plaster models using an extraoral scanner (PM). Sixty-four digital models were produced per group. Each 3D mesh and corresponding model were imported into the Geomagic software for alignment and deviation analysis. Registration errors and mean deviations (MD+ and MD-) were assessed quantitatively, and the qualitative evaluation was performed through color maps. RESULTS: Deviations ranged from -0.4 to 0.3mm in both groups, with 80% of the values distributed between -0.5 and 0.5mm. In both groups, Registration error, MD+ and 3D Error were below 0.5mm, and MD- was higher than -0.5mm. Statistically significant differences were found between IS and PM models for MD+, as well as for registration error and MD+ in mandibular comparisons. CONCLUSIONS: Superimpositions were not affected by the model acquisition method, and both were clinically acceptable. However, PM superimpositions showed greater deviation magnitudes, suggesting an inclination for IS to produce more accurate alignments, especially in the mandible.
Complications in Orthognathic Surgery Gabriel Conceição Brito, Márcio de Moraes, Luciana Asprino Journal of Craniofacial Surgery, 2026 The study aimed to evaluate complications in orthognathic surgery in a teaching hospital in Brazil over 10 years. Medical records were collected of patients who underwent surgery in the Division of Oral and Maxillofacial Surgery from January 1, 2014, to January 1, 2024. The dependent variables were intraoperative and postoperative complications, and the surgical procedure performed (monomaxillary or bimaxillary surgery). They were evaluated and compared with the independent variables of age, sex, substance abuse, presence of paresthesia or complications, and regions of complication. Specific complications were characterized as bad split, dental or skeletal recurrence, hardware failure, breakage/fracture of a surgical instrument, dental or periodontal damage, hemorrhage, and “others”. In the results, 183 orthognathic surgeries were included, with 31 participants having some complications, with 10 having intraoperative complications and 21 postoperative. No correlation was found between the complications and variables evaluated ( P >0.05). Despite the limitations related to retrospective studies, the evaluation and disclosure of complications in orthognathic surgery are important for surgeons to understand the factors that contribute to their occurrence and how to avoid and treat them earlier and more effectively.
Effect of different osteotome surgical protocols on primary implant stability in poor quality bone: an ex vivo study Anderson Jara Ferreira, Andrés Cáceres-Barreno, Hugo Gaêta-Araujo, Francisco Haiter-Neto, Luciana Asprino Scientific Reports, 2025 To compare the effect of three types of surgical site preparation protocols on the primary stability of dental implants installed in poor quality bone. Pig tibia blocks were analyzed using X-ray microtomography to identify regions of poor bone quality like bone type IV, in which thirty osteotomies were performed using one of three techniques: conventional implant bed preparation (n = 10), undersized osteotomies (n = 10), and osteotomies prepared with expander-osteotomes (n = 10). The primary stability of the implants was evaluated using the final insertion torque and the implant stability quotient (ISQ). Statistical analysis included the Shapiro-Wilk test, One-way ANOVA, with Tukey's post-hoc and Pearson's correlation coefficient with a significance level of 5%. The undersized surgical technique obtained higher final insertion torque values (p < 0.05) and better results in terms of resonance frequency analysis values (p < 0.05). Pearson's correlation test showed a strong correlation between the variables (p < 0.05). According to the methodology used, the undersized surgical technique proved to be more advantageous in regions of low bone quality.
Atrophic Jaws With Infected Third Molars: The Role of Prophylactic Internal Fixation Gabriel C. Brito, Maria J.A.V. Calori, Luciana Asprino Journal of Craniofacial Surgery, 2025 This study presents 2 cases of elderly edentulous patients with infected, impacted mandibular third molars in severely atrophic mandibles. Both cases were managed surgically with tooth extraction and prophylactic internal fixation to prevent pathologic fracture. The first case involved a 62-year-old woman with a class III atrophic mandible and chronic infection. Surgical treatment included intraoral drainage, odontossection, extraction, and placement of a 2.4 mm osteosynthesis plate aided by a stereolithographic model. The second case, a 70-year-old woman with facial cellulitis, was treated initially with drainage and antibiotics, followed by delayed extraction and internal fixation using the intraoral approach. Both cases had favorable outcomes without postoperative complications. Prophylactic osteosynthesis is a safe and effective technique in high-risk cases involving atrophic mandibles and the need for third molar removal. The intraoral approach, combined with 3D planning, enhances surgical precision and minimizes morbidity.
Virtual Surgical Planning-Assisted Mandibular Sagittal Split Osteotomy for Complex Third Molar Extraction Gabriel Conceição Brito, Maria Júlia Assis Vicentin Calori, Márcio de Moraes, Luciana Asprino Journal of Craniofacial Surgery, 2025 This case report presents a rare use of mandibular sagittal split osteotomy (MSSO) for the extraction of an impacted third molar, aided by virtual surgical planning. A 32-year-old male presented for third molar removal, but clinical examination revealed the right third molar was not visible intraorally, and access was limited due to restricted mouth opening and tongue mobility. Cone-beam computed tomography confirmed a horizontally impacted right mandibular third molar. Due to the tooth's position and proximity to the inferior alveolar nerve, MSSO was selected. Virtual surgical planning and a 3D-printed surgical guide were used to plan and execute the procedure. The molar was successfully extracted while preserving the nerve, and the osteotomy was stabilized with a 2.0 4-hole miniplate. The patient experienced no postoperative complications or occlusal changes. This case supports MSSO, combined with virtual planning, as a safe and effective option for extracting impacted teeth in complex anatomic locations.
Early dental implant failure associated with postoperative infection: A retrospective 21-year study Renata Silveira Sagnori, Vitor José da Fonseca, Luciano Henrique Ferreira Lima, Douglas Rangel Goulart, Luciana Asprino, Márcio de Moraes, Alexander Tadeu Sverzut Oral Surgery, 2024 AimThere are several causes related to early dental implant failure, and infection is one of the most common risk factors in the initial phase of osseointegration. The aim of this retrospective study was to evaluate early dental implant failure associated with postoperative infection and identify the factors associated with such failure.Materials and MethodsA retrospective study was conducted, and the main predictor variable was early dental implant failure. The main cause of failure was postoperative infection, including factors related to early loss due to infection, such as installation site, type of implant–abutment connection used and presence of previous bone graft. Appropriate descriptive and multivariate statistics were computed, and Chi‐square tests and logistic binary regression were used to identify the factors related to early failure.ResultsThe study sample consisted of 1674 patients, who had 4886 implants installed and were selected for statistical analysis. A total of 3219 implants were inserted in women and 1667 in men. The main outcome variable was early implant failure due to infection. There were 164 early failures in the study, accounting for 3.3% of the sample. Of those failures, 35 were a consequence of postoperative infection, resulting in 21.34% of early failures. The main risk factor identified was the presence of infection (odds ratio [OR] = 53.67, with 95% confidence interval [CI]).ConclusionsThe study's results suggest that infection may be considered a risk factor for early failure of osseointegrated implants.
INTEREXAMINER AGREEMENT BETWEEN TWO DENTAL SPECIALTIES FOR THE DETECTION OF BIFID MANDIBULAR CANAL AND ACCESSORY MENTAL FORAMEN IN CONE-BEAM COMPUTED TOMOGRAPHY. , Larissa Moreira-Souza, Francisco Carlos-Groppo, , Francisco Haiter-Neto, , Luciana Asprino, and Journal of Oral Research, 2022 Introduction: The aim of this study was to assess the agreement between oral and maxillofacial radiologists (OMFR) and oral and maxillofacial surgeons (OMFS) for the detection of bifid mandibular canal (BMC) and accessory mental foramen (AMF) using cone-beam computed tomography (CBCT). Material and Methods: This retrospective study involved 22 examiners (11 OMFR and 11 OMFS) who independently assessed 30 CBCT volumes from patients (n = 60 hemi-mandibles) under preoperative radiographic evaluation for implant placement. The examiners scored the presence of BMC and AMF in each hemimandible. The interexaminer agreements were assessed using Fleiss' kappa statistics. Results: For intra-examiner agreement, 40% of the sample was reevaluated. The interexaminer agreement between OMFR and OMFS was slight (0.12) for the detection of BMC and fair (0.24) for AMF. The agreement among OMFR for detection of BMC was fair (0.22), and it was slight among OMFS (0.15). The agreement among OMFR for detection of AMF was substantial (0.61), and among OMFS it was fair (0.22). Agreements between OMFR and OMFS were slight for BMC and fair for AMF, independently of the years of experience. Intraexaminer agreement ranged from 60% to 90% among OMFR and from 55% to 90% among OMFS. Conclusion: A slight and a fair agreement between OMFR and OMFS was found for the detection of BMC and AMF, respectively. In general, OMFR obtained higher agreement among themselves, mainly for detection of AMF.
About chin (Genioplasty) surgery Heitor Fontes da-Silva, Luide França Marinho, Gustavo Almeida Souza, Alexander Tadeu Sverzut, Sergio Olate, Luciana Asprino, Márcio de-Moraes International Journal of Morphology, 2020
Reply Eder Alberto Sigua-Rodriguez, Douglas Rangel Goulart, Alexander Sverzut, Luciana Asprino, Márcio de Moraes Journal of Oral and Maxillofacial Surgery, 2019
Osteotomy and osteosynthesis in complex segmental genioplasty with double surgical guide International Journal of Clinical and Experimental Medicine, 2014
Temporal abscess after third molar extraction in the mandible Patrício José de Oliveira Neto, Maximiana Cristina de Souza Maliska, Renato Sawazaki, Luciana Asprino, Márcio de Moraes, Roger William Fernandes Moreira Oral and Maxillofacial Surgery, 2012
Are there differences in the mandibular morphometry in patients who are candidates for orthognathic surgery? part 1: Influences of facial class International Journal of Morphology, 2009
Are there differences in the mandibular morphometry in patients who are candidates for orthognathic surgery? part 2: Influences of gender International Journal of Morphology, 2009