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Nogueira LC, Quinto JHS, Trivellato PFB, Sverzut CE, Trivellato AE. Epidemiological Study of Frontal Sinus Fractures: Evaluation of 16 Years of Care at the Faculty of Dentistry of Ribeirão Preto/Brazil. J Maxillofac Oral Surg 2024; 23:371-379. [PMID: 38601249 PMCID: PMC11001839 DOI: 10.1007/s12663-022-01765-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 07/02/2022] [Indexed: 11/30/2022] Open
Abstract
Purpose Aiming to evaluate and study the epidemiological profile of frontal sinus fractures treated in the region of Ribeirão Preto-Brazil. Methods Sixteen years of activity in the Oral and Maxillofacial service of the Faculty of Dentistry of Ribeirão Preto/SP (FORP/USP), totaling 9,736 consultations, 4,524 with facial fractures, those diagnosed with frontal sinus fracture (113) were evaluated and selected for the study. Results Frontal sinus fractures accounted for 2.5% of facial fractures, the majority occurring in men (89.4%), concentrated in the age group 21-30 years old, with 52.2% of cases being caused by road traffic accidents (RTA). Associations with other facial fractures are common and appeared in 75.2% of cases. Treatment was followed either surgically, by open reduction internal fixation (52.2%) or conservatively (35.4%). Analyzing only the 28 isolated frontal sinus fractures, the most common treatment was conservative (46.4%). surgical treatment dropped to 25%. The most common postoperative complications were temporal branch paralysis and supraorbital nerve paresthesia, both occurring in 30.5% of surgical cases. Conclusion The frequency of frontal sinus fractures may be decreasing, but the pattern of occurrence in young men due to road traffic accidents does not seem to change, fortunately the appearance of serious complications is not common and it is usually associated with more severe trauma.
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Affiliation(s)
- Lucas Costa Nogueira
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café, S/nCampus USP, Ribeirão Preto, São Paulo, CEP: 14040-904 Brazil
| | - José Henrique Santana Quinto
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café, S/nCampus USP, Ribeirão Preto, São Paulo, CEP: 14040-904 Brazil
| | - Priscila Faleiros Bertelli Trivellato
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café, S/nCampus USP, Ribeirão Preto, São Paulo, CEP: 14040-904 Brazil
| | - Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café, S/nCampus USP, Ribeirão Preto, São Paulo, CEP: 14040-904 Brazil
| | - Alexandre Elias Trivellato
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Av Do Café, S/nCampus USP, Ribeirão Preto, São Paulo, CEP: 14040-904 Brazil
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Amaral EC, Javaroni JB, Silveira HA, Trivellato AE, Sverzut CE, León JE. Pseudocarcinomatous Squamous Hyperplasia After Surgical Management Of Pediatric Ameloblastoma: An Immunohistochemical Study. J Maxillofac Oral Surg 2023; 22:741-745. [PMID: 37534340 PMCID: PMC10390451 DOI: 10.1007/s12663-023-01912-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 03/26/2023] [Indexed: 08/04/2023] Open
Abstract
Pseudocarcinomatous squamous hyperplasia (PSH) affecting the jaws is uncommon. The mandible is the most common location, usually as a complication associated with osteomyelitis, medication-related osteonecrosis or osteoradionecrosis. Herein, we report an 8-year-old male patient presenting a solid ameloblastoma, plexiform type, who was treated by segmental mandibulectomy with bone grafting. Three months later, on the underlying graft, a sinus tract was observed, and a small bone fragment was resected which was diagnosed as bone sequestration associated with PSH. After 7-year follow-up, the patient is well, without alterations. To our knowledge, for the first time, we report in detail the immunohistochemical features of PSH which, in addition to epithelial component profile and chronic inflammatory cells, revealed a diffuse infiltration by dendritic cells, suggesting that epithelial cell-immune cell interactions in PSH pathogenesis should also be considered.
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Affiliation(s)
- Eloísa Costa Amaral
- Oral and Maxillofacial Surgery, Department of Oral and Maxillofacial Surgery and Periodontology, Ribeirão Preto Dental School (FORP/USP), University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Julia Biliato Javaroni
- Oral Pathology, Department of Stomatology, Public Oral Health, and Forensic Dentistry, Ribeirão Preto Dental School (FORP/USP), University of São Paulo, Ribeirão Preto, São Paulo, 14040-904 Brazil
| | - Heitor Albergoni Silveira
- Oral Pathology, Department of Stomatology, Public Oral Health, and Forensic Dentistry, Ribeirão Preto Dental School (FORP/USP), University of São Paulo, Ribeirão Preto, São Paulo, 14040-904 Brazil
| | - Alexandre Elias Trivellato
- Oral and Maxillofacial Surgery, Department of Oral and Maxillofacial Surgery and Periodontology, Ribeirão Preto Dental School (FORP/USP), University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Cássio Edvard Sverzut
- Oral and Maxillofacial Surgery, Department of Oral and Maxillofacial Surgery and Periodontology, Ribeirão Preto Dental School (FORP/USP), University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Jorge Esquiche León
- Oral Pathology, Department of Stomatology, Public Oral Health, and Forensic Dentistry, Ribeirão Preto Dental School (FORP/USP), University of São Paulo, Ribeirão Preto, São Paulo, 14040-904 Brazil
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Sverzut TFV, Sverzut AT, Trivellato AE, Sverzut CE. Retrospective analysis of the predictability of using three-dimensional models for preoperative planning of the length of zygomatic implants. Oral Maxillofac Surg 2023; 27:53-58. [PMID: 35166998 DOI: 10.1007/s10006-022-01047-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 02/10/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE This present study aimed to retrospectively evaluate the predictability of using three-dimensional models (TDMs) to plan the preoperative lengths of zygomatic implants (ZIs). METHODS The records of all patients that received such implants between March 2007 and March 2019 were evaluated. The ZI lengths predicted on the TDMs were compared to the lengths of the implants the patients received. RESULTS In total, the records of 74 patients were evaluated, of which 37 records met the criteria of inclusion, and were included in the study. Twenty-seven (73%) of the patients were female and 10 (27%) were male, ranging from 34 to 80 years of age, with the average age being 55.7 years. Seventeen (43.2%) of these patients were classified as ASA I and 21 (56.8%) as ASA II. A total of 142 ZIs were planned and installed in the time frame mentioned. Without distinguishing the region of the maxilla, the implants used were, on average, 1.1 mm larger in length than those initially planned. CONCLUSION Overall, the data indicates moderate agreement between the planned and surgical lengths of the ZIs and indicates that using TDMs is a predictable and reliable preoperative planning technique of the length of posterior ZIs.
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Affiliation(s)
- Thales Fabro Vanzela Sverzut
- Residency Training Program in Oral and Maxillofacial Surgery, School of Dentistry of Ribeirão Preto of the University of São Paulo, Avenida Do Café, s/n, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil
| | - Alexander Tadeu Sverzut
- Department of Oral Diagnosis, Maxillofacial Surgery Division, Piracicaba Dental School of the University of Campinas, Av. Limeira, 901, Bairro Areião, Piracicaba, São Paulo, 13414-903, Brazil
| | - Alexandre Elias Trivellato
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto of the University of São Paulo, Avenida Do Café, s/n, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil
| | - Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto of the University of São Paulo, Avenida Do Café, s/n, Monte Alegre, Ribeirão Preto, São Paulo, 14040-904, Brazil.
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De Oliveira Barbeiro C, Trivellato PFB, De Souza FHP, Bufalino A, Sverzut CE, Trivellato AE, León JE. ODONTOGENIC MYXOMA ASSOCIATED WITH CALCIFICATIONS: CASE REPORT OF AN UNUSUAL HISTOPATHOLOGICAL FEATURE. Oral Surg Oral Med Oral Pathol Oral Radiol 2022. [DOI: 10.1016/j.oooo.2022.01.144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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da Silva Oliveira S, de Carvalho PHM, Sverzut CE, Trivellato AE. Does the type of sagittal split ramus osteotomy influence fixation strength? Evaluation of the mechanical behavior of two types of fixation used in three types of sagittal split ramus osteotomy. Oral Maxillofac Surg 2022; 26:633-639. [PMID: 35022847 DOI: 10.1007/s10006-022-01038-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 01/04/2022] [Indexed: 10/19/2022]
Abstract
PURPOSE This study compared the mechanical behavior of two fixation techniques used in three sections representing the sagittal split ramus osteotomy (SSRO) in polyurethane replicas that were divided into groups, according to type of section, and sub-groups according to type of fixation, simulating 11-mm advancement and 6º clockwise mandibular rotation. METHODS Loads were applied in two regions, aiming at progressive application and consequent strength value, measured in kilogram-force in displacements of 1, 3, 5, and 7 mm, from the load application tip. Shapiro-Wilk test was performed, followed by two-way analysis of variance (ANOVA-2 way), and Bonferroni's multiple comparison. RESULTS The results showed no statistically significant difference in the type of section and type of fixation used when load was applied to the inter-incisor region. However, when load was applied to the first molar region, statistically significant difference was observed in 1-mm displacement, in which section described by Epker with two modifications showed greater strength, regardless of type of fixation used (p = 0.007). CONCLUSION In the application of load in the inter-incisor region, there was no statistical difference between the type of osteotomy and the type of fixation used. When applying loads to molars, there was a difference for the type of osteotomy, where the Epker osteotomy with 2 modifications presented greater resistance, regardless of the type of fixation used.
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Affiliation(s)
- Soraya da Silva Oliveira
- School of Dentistry of Ribeirão Preto (FORP-USP), University of São Paulo, Avenida Do Café, S/NRibeirão Preto, São Paulo, 14040-904, Brazil
| | - Pedro Henrique Mattos de Carvalho
- School of Dentistry of Ribeirão Preto (FORP-USP), University of São Paulo, Avenida Do Café, S/NRibeirão Preto, São Paulo, 14040-904, Brazil
| | - Cássio Edvard Sverzut
- School of Dentistry of Ribeirão Preto (FORP-USP), University of São Paulo, Avenida Do Café, S/NRibeirão Preto, São Paulo, 14040-904, Brazil
| | - Alexandre Elias Trivellato
- School of Dentistry of Ribeirão Preto (FORP-USP), University of São Paulo, Avenida Do Café, S/NRibeirão Preto, São Paulo, 14040-904, Brazil.
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Romano F, Sverzut CE, Trivellato AE, Saraiva MCP, Nguyen TT. Surgically assisted rapid palatal expansion (SARPE): three-dimensional superimposition on cranial base. Clin Oral Investig 2022; 26:3885-3897. [PMID: 35013784 DOI: 10.1007/s00784-021-04355-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 12/29/2021] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To evaluate dental and skeletal changes caused by surgically assisted rapid palatal expansion (SARPE) using the superimposition of three-dimensional cone-beam computed tomography (CBCT) images on the cranial base. MATERIAL AND METHODS This is a retrospective quasi-experiment before-and-after study using a convenience sample. Twenty-four adult patients (13 male and 11 female) were evaluated before SARPE (T0), immediately after expansion (T1), and after 6 months of retention (T2). CBCT scans were superimposed on the anterior cranial base using voxel-based registration. Measurements from different reference points were used for comparisons between times. RESULTS At T1, all teeth had significant buccal tipping. At T2, most teeth remained in the same position as at T1, except the first premolar and the first molar, whose buccal roots moved slightly. The amount of bony expansion was 65 to 70% of the amount of tooth movement. The A point and maxillary incisors moved anteriorly from T0 to T1 and T2 (p < 0.0001). Inter-nasal distance had increased significantly at T1 (p < 0.0001) and remained stable at T2 (p = 0.478). No expansion was achieved at the zygomatic arch (p = 0.114). CONCLUSION SARPE promoted substantial buccal tipping of posterior teeth and some bone displacement; it also moved the maxilla and teeth forward and increased nasal width. CLINICAL RELEVANCE No other clinical studies have evaluated dental and skeletal changes caused by SARPE using superimposition of 3D CBCT images on the cranial base. This study findings may help clinical dentists plan treatments using safe and reliable information.
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Affiliation(s)
- Fábio Romano
- Department of Pediatric Dentistry, Orthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil. .,Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA.
| | - Cássio Edvard Sverzut
- Department of Oral & Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Alexandre Elias Trivellato
- Department of Oral & Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Maria Conceição Pereira Saraiva
- Department of Pediatric Dentistry, Epidemiology, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Tung T Nguyen
- Department of Orthodontics, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
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Augusto-Neto RT, Marinheiro BH, Silveira HA, Polanco XBJ, León JE, Trivellato AE, Sverzut CE. Complex odontoma restricting mouth opening: an unusual clinical presentation and surgical management. Int J Health Sci (Qassim) 2021; 15:60-63. [PMID: 34548864 PMCID: PMC8434844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Odontomas are common benign odontogenic tumors, being often detected on routine radiographs during the first two decades of life. Rarely, odontoma can interfere with jaw movements, causing mouth opening limitation. A 28-year-old male patient was referred complaining of restriction of mouth opening and mandibular movements, which started 6 months ago. Clinical examination revealed a painless increase of volume on the right maxilla, which interfered the mandibular movements, being associated with pain in these attempts. A well-defined, oval radiopaque lesion in close relationship with the impacted maxillary right third molar was detected in tomographic reconstructions. A surgical excision of the lesion was performed, and microscopy revealed complex odontoma. After 4 months of follow-up, the patient achieved adequate mouth opening and recovered mandibular movements. In the current case, the lesion was placed in a difficult access site, which directly interfered with the displacement of coronoid process. Odontoma should be included in the differential diagnosis when assessing causes of restricted mouth opening.
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Affiliation(s)
- Renato Torres Augusto-Neto
- Department of Oral and Maxillofacial Surgery and Periodontology, Oral and Maxillofacial Surgery, Ribeirão Preto Dental School (FORP/USP); University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Bruno Henrique Marinheiro
- Department of Oral and Maxillofacial Surgery and Periodontology, Oral and Maxillofacial Surgery, Ribeirão Preto Dental School (FORP/USP); University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Heitor Albergoni Silveira
- Department of Stomatology, Public Oral Health, and Forensic Dentistry, Oral Pathology, Ribeirão Preto Dental School (FORP/USP); University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Xiomara Beatriz Jimenez Polanco
- Department of Stomatology, Public Oral Health, and Forensic Dentistry, Oral Pathology, Ribeirão Preto Dental School (FORP/USP); University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Jorge Esquiche León
- Department of Stomatology, Public Oral Health, and Forensic Dentistry, Oral Pathology, Ribeirão Preto Dental School (FORP/USP); University of São Paulo, Ribeirão Preto, São Paulo, Brazil,Address for correspondence: Jorge Esquiche León, Oral Pathology, Department of Stomatology, Public Oral Health, and Forensic Dentistry, Oral Pathology, Ribeirão Preto, Dental School, University of São Paulo, Avenida do Café, S/N, Ribeirão Preto, São Paulo, 14040-904, Brazil. Phone: +55-16 33154063. E-mail:
| | - Alexandre Elias Trivellato
- Department of Oral and Maxillofacial Surgery and Periodontology, Oral and Maxillofacial Surgery, Ribeirão Preto Dental School (FORP/USP); University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, Oral and Maxillofacial Surgery, Ribeirão Preto Dental School (FORP/USP); University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Dias RR, Takeshita WM, Sverzut AT, Trivellato AE, Sverzut CE. Linear analysis of the nasal septum in patients treated with surgically assisted rapid maxillary expansion. Am J Orthod Dentofacial Orthop 2020; 159:71-80. [PMID: 33234461 DOI: 10.1016/j.ajodo.2019.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 11/01/2019] [Accepted: 11/01/2019] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Surgically assisted rapid maxillary expansion is a widely used surgical procedure for resolving transverse maxillary occlusal changes in patients with bone maturity. However, few studies about the postoperative morphologic alterations in the nasal cavity in its inferior portion and the nasal septum positioning exist. METHODS The linear nasal septum measurements of 26 adult patients treated with surgically assisted rapid maxillary expansion from 2009 to 2013 were assessed through a retrospective analysis of cone-beam computed tomographies, in Digital Imaging and Communications in Medicine files, through the Dolphin Imaging program (Dolphin Imaging and Management Solutions, Chatsworth, Calif), aimed to identify significant changes during 3 time periods of the treatment: preoperative, immediately after the palatal expansion device locking (immediate postoperative), and 6-months postoperative (late postoperative). The analyses were performed in the inferior third of the nasal septum, from 4 equidistant points in anteroposterior position and height, using fixed cranial references for lateral measures of displacement. RESULTS No significant difference was found between preoperative, immediate postoperative, and late postoperative measurements in the 4 fixed nasal septum measurements, applying the analysis of variance test with a significance level of 5%. Comparing the surgical times alone, we found no statistically significant difference between the right and left sides applying the Student t test, which also showed symmetry in the nasal septum. CONCLUSIONS The measurements of the nasal septum did not change in the different surgical times throughout their inferior extension, and they remained symmetrical throughout patients' follow-up period.
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Affiliation(s)
- Rafael Rodrigues Dias
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | - Alexander Tadeu Sverzut
- Division of Oral and Maxillofacial Surgery, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Alexandre Elias Trivellato
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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de Carvalho PHM, Oliveira SDS, Favaro M, Sverzut CE, Trivellato AE. Which type of method shows the best mechanical behavior for internal fixation of bilateral sagittal split osteotomy in major advancements with clockwise rotation? Comparison of four methods. Oral Maxillofac Surg 2020; 25:27-34. [PMID: 32661574 DOI: 10.1007/s10006-020-00883-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 07/07/2020] [Indexed: 11/30/2022]
Abstract
PURPOSE The aim of the present study was to evaluate the four methods for bilateral sagittal osteotomy fixation. METHODS In this study, 56 replicas of whole mandibles made of rigid polyurethane were used. After simulation of major advancement (11 mm) with clockwise rotation of the mandible (6o) in relation to the occlusal plane, the bone segments were fixed with plates and screws of the 2.0-mm system on both the right and left sides: group I, double "H" plate; group II, two mini-plates; group III, "hybrid technique"; and group IV, three bicortical screws in the "inverted L" pattern. The mandibles were submitted to load on the central incisors and right first molar. RESULTS The mean value of group I was higher than those of groups IV and II in the displacement of 1 mm (F = 4.705; p = 0.010) with load on the incisor. The mean value of group III was higher than those of groups I and II in the displacement of 1 mm (F = 5.166; p = 0.007) and 3 mm (F = 5.166; p = 0.007). The mean value of group IV was higher than that of group II (F = 3.142; p = 0.044) with load on the molar. CONCLUSION Therefore, after the analyses, the hybrid technique was the one that showed the best results.
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Affiliation(s)
- Pedro Henrique Mattos de Carvalho
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto (FORP/USP), University of São Paulo, Avenida do Café, S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Soraya da Silva Oliveira
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto (FORP/USP), University of São Paulo, Avenida do Café, S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Matheus Favaro
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto (FORP/USP), University of São Paulo, Avenida do Café, S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto (FORP/USP), University of São Paulo, Avenida do Café, S/N, Ribeirão Preto, SP, 14040-904, Brazil
| | - Alexandre Elias Trivellato
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto (FORP/USP), University of São Paulo, Avenida do Café, S/N, Ribeirão Preto, SP, 14040-904, Brazil.
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De Almeida LY, Dos Santos JL, Sverzut CE, Trivellato AE, De Almeida LKY, Ribeiro-Silva A, León JE. Intraoral Pigmented Low-Grade Adenocarcinoma, Not Otherwise Specified: an Immunohistochemical Study. Oral Surg Oral Med Oral Pathol Oral Radiol 2018. [DOI: 10.1016/j.oooo.2018.02.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Miotto LN, Ferrisse TM, Colturato CBN, Almeida LY, Trivellato AE, Sverzut CE, León JE. Solitary Central Osteoma of the Maxilla: a Case Report. Oral Surg Oral Med Oral Pathol Oral Radiol 2018. [DOI: 10.1016/j.oooo.2018.02.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Cavalieri-Pereira L, Spagnol G, Sverzut CE, de Moraes M, Trivellato AE. Resistance of four fixation techniques used to treat subcondylar fractures. Oral Maxillofac Surg 2018; 22:91-96. [PMID: 29344821 DOI: 10.1007/s10006-018-0675-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 01/09/2018] [Indexed: 06/07/2023]
Abstract
OBJECTIVE This study aimed to evaluate the resistance of four fixation techniques used to treat subcondylar fractures. The following techniques were evaluated: fixation with one 4-hole single straight plate; fixation with one 2-mm 4-hole system plate and one 1.5-mm 3-hole system plate; fixation with two 2-mm plates with a 3-hole anterior plate; and fixation with two 2-mm plates with four holes each. STUDY DESIGN Each fixation technique was subjected to a resistance test. The load values were measured when displacement of 1, 2, and 5 mm was reached. Load values were compared for statistically significant differences using analysis of variance (ANOVA; p < 0.5) and Tukey's test. RESULTS Statistically significant differences were observed, when the load was applied to the first molar on the side of the fracture. The group treated with a 4-hole, 2-mm, one plate system showed resistance to lower load values than the groups treated with two plates in any combination. CONCLUSIONS When the fracture was fixed using two plates, regardless of the kind of plates used, no statistically significant difference between the groups was observed. However, two plate systems showed better resistance than one plate systems.
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Affiliation(s)
- Lucas Cavalieri-Pereira
- Division of Oral and Maxillofacial Surgery, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil
| | - Guilherme Spagnol
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n-Campus USP, 14090-904, Ribeirão Preto, São Paulo, Brazil
| | - Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n-Campus USP, 14090-904, Ribeirão Preto, São Paulo, Brazil
| | - Márcio de Moraes
- Division of Oral and Maxillofacial Surgery, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil
| | - Alexandre Elias Trivellato
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n-Campus USP, 14090-904, Ribeirão Preto, São Paulo, Brazil.
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Yamaji MAK, Oliveira Neto PJD, Ribeiro MDC, Pereira LC, Morais MD, Sverzut CE, Trivellato AE. Evaluation of in vitro resistance of different 2.0-mm titanium plates on the mandibular angle sectioning. Oral Maxillofac Surg 2016; 19:65-70. [PMID: 25015878 DOI: 10.1007/s10006-014-0456-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Accepted: 07/01/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The purpose of this study was to compare, by mechanical in vitro testing, a regular 5-hole plate and a long 4-hole plate with a regular 4-hole plate, applied to stabilize a simulated mandibular angle fracture. STUDY DESIGN The plates from the 2.0-mm titanium-based system were adapted and stabilized passively in the same site in both groups using four screws, 6 mm long. During the resistance-to-load test, the force was applied perpendicular to the occlusal plane at three different points: first molar at the plated side, first molar at the contralateral side, and between the central incisors. RESULTS The regular 5-hole plates and longer 4-hole plates were superior to the regular 4-hole plates. Furthermore, no statistically significant difference was found between the regular 5-hole plates and long 4-hole plate. CONCLUSIONS The length and shape of plates did not interfere with the effectiveness to stabilize the fragments. OBJECTIVE The purpose of this study was to compare, by mechanical in vitro testing, a regular 5-hole plate and a long 4-hole plate with a regular 4-hole plate, applied to stabilize a simulated mandibular angle fracture.Study design The plates from the 2.0-mm titanium-based system were adapted and stabilized passively in the same site in both groups using four screws, 6 mm long. During the resistance-to-load test, the force was applied perpendicular to the occlusal plane at three different points: first molar at the plated side, first molar at the contralateral side, and between the central incisors. RESULTS The regular 5-hole plates and longer 4-hole plates were superior to the regular 4-hole plates. Furthermore, no statistically significant difference was found between the regular 5-hole plates and long 4-hole plate.Conclusions The length and shape of plates did not interfere with the effectiveness to stabilize the fragments.
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Araújo RTE, Sverzut AT, Trivellato AE, Sverzut CE. Retrospective Analysis of 129 Consecutive Zygomatic Implants Used to Rehabilitate Severely Resorbed Maxillae in a Two-Stage Protocol. Int J Oral Maxillofac Implants 2016; 32:377–384. [PMID: 27632155 DOI: 10.11607/jomi.5136] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE To report on the clinical outcome of 129 zygomatic implants placed in 37 patients with severely resorbed partially or completely edentulous maxillae. MATERIALS AND METHODS Patients who received zygomatic implants between 2007 and 2014 were included in this retrospective analysis. All patients were treated using the same surgical protocol, the sinus slot technique. The following data were recorded: sex, age, race, medical history, etiology, addictions, degree of bone atrophy, type and size of zygomatic implants, number of implants placed, type of prosthesis, survival rate, and success of implants and complications. Follow-up included standardized clinical and tomography examinations. RESULTS Thirty-seven consecutive patients (25 women, 12 men; mean age 55.64 years [range 40 to 77 years]) were treated. All were in need of oral reconstruction and had maxillary atrophy that warranted zygomatic implant placement. One hundred twenty nine zygomatic implants were placed in these 37 patients. Two of the implants failed, resulting in a cumulative survival rate of 98.44%. Maxillary sinusitis was the most common complication found (21.62%); however, neither of the implant failures was related to sinusitis or smoking. CONCLUSION The zygomatic implant is a reliable option for treatment of the severely resorbed maxilla.
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Moura LB, Spin-Neto R, Sverzut CE, Monnazzi MDS, Trivellato AE, Gabrielli MAC, Pereira-Filho VA. Evaluation of the palatal split pattern in surgically rapid maxillary expansion-comparison of two techniques. Oral Maxillofac Surg 2016; 20:255-258. [PMID: 27154514 DOI: 10.1007/s10006-016-0562-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 05/02/2016] [Indexed: 06/05/2023]
Abstract
PURPOSE Surgically assisted rapid maxillary expansion is performed to correct transverse deficiencies of the maxilla, and it is indicated in specific clinical situations. The literature presents different opinions in several aspects, mainly regarding the effect of disjunction of the pterygoid plates. The aim of this study was to evaluate the pattern of maxillary expansion obtained with two surgical techniques, with and without disjunction of the pterygoid plates. METHODS Twenty patients treated with surgically assisted rapid maxillary expansion for correction of transversal discrepancies were included in this retrospective study and divided into two groups: (G1) patients operated without disjunction of pterygoid plates and (G2) patients treated with release of the pterygoid plates. RESULTS There were seven male and 13 female patients, and the mean age was 29.9 years. Cone beam computed tomography images obtained after final activation of the expansion device were evaluated and complete disjunction of the midpalatal suture (type I) was present in 75 % of the patients whereas incomplete disjunction of the midpalatal suture (type II) was observed in 25 %. Chi-square test showed no statistically significant difference between groups (p = 0.606). CONCLUSION No difference was found in relation to the maxillary disjunction pattern irrespective of the treatment given to pterygoid plates.
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Affiliation(s)
- Lucas Borin Moura
- Division of Oral and Maxillofacial Surgery, Department of Diagnosis and Surgery, Dental School at Araraquara - Unesp, Rua: Humaitá, 1680, Araraquara, SP, 14801-903, Brazil.
| | - Rubens Spin-Neto
- Section of Oral Radiology, Department of Dentistry, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodonthology, Dental School at Ribeirão Preto-USP, Ribeirão Preto, SP, Brazil
| | - Marcelo da Silva Monnazzi
- Division of Oral and Maxillofacial Surgery, Department of Diagnosis and Surgery, Dental School at Araraquara - Unesp, Rua: Humaitá, 1680, Araraquara, SP, 14801-903, Brazil
| | - Alexandre Elias Trivellato
- Department of Oral and Maxillofacial Surgery and Periodonthology, Dental School at Ribeirão Preto-USP, Ribeirão Preto, SP, Brazil
| | - Marisa Aparecida Cabrini Gabrielli
- Division of Oral and Maxillofacial Surgery, Department of Diagnosis and Surgery, Dental School at Araraquara - Unesp, Rua: Humaitá, 1680, Araraquara, SP, 14801-903, Brazil
| | - Valfrido Antonio Pereira-Filho
- Division of Oral and Maxillofacial Surgery, Department of Diagnosis and Surgery, Dental School at Araraquara - Unesp, Rua: Humaitá, 1680, Araraquara, SP, 14801-903, Brazil
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Sverzut CE, Trivellato AE, Sverzut AT. Use of a titanium mesh "shelter" combined with the soft tissue matrix expansion (tent pole) grafting in the reconstruction of a severely resorbed edentulous mandible. Technical note. Braz Dent J 2015; 26:193-7. [PMID: 25831113 DOI: 10.1590/0103-6440201301957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 11/19/2014] [Indexed: 11/22/2022] Open
Abstract
Patients wearing complete dentures for a long time usually exhibit lack of bone and keratinized mucosa in the bearing area due to bone resorption. The patients suffering from this phenomenon usually have unstable and non-retentive complete denture, which result in constant trauma to the mucosa, pain, functional limitations and worsening of facial esthetics. An innovative technique has been described in which a novel surgical approach using osseointegrated dental implants as "tent poles" was applied concomitant with particulate autogenous bone graft. The authors claim that the control and maintenance of the surgically expanded soft tissue volume should prevent graft resorption in the long term. Nevertheless, resorption of the bone graft is usually more significant where the bone mass is poorer, in the mandibular body. This paper describes a case of severely resorbed edentulous mandible in which the "tent pole" technique was applied with some modifications. Use of the titanium mesh "shelters" and two additional implants was effective in "protecting" the bone graft in the posterior portion of the mandibular body increasing bone mass volume in this area. Furthermore, we believe that this kind of graft "protection" on the whole residual alveolar ridge can increase the width of bone mass gain optimizing the "tent pole" technique.
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Affiliation(s)
- Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, USP - University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Alexandre Elias Trivellato
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, USP - University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Alexander Tadeu Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, USP - University of São Paulo, Ribeirão Preto, SP, Brazil
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Veronez B, Matos FPD, Monnazzi MS, Sverzut AT, Sverzut CE, Trivellato AE. Maxillofacial infection. A retrospective evaluation of eight years. Braz J Oral Sci 2014. [DOI: 10.1590/1677-3225v13n2a04] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Pepato AO, Palinkas M, Regalo SCH, Ribeiro MC, Souza TAS, Siéssere S, de Sousa LG, Sverzut CE, Trivellato AE. Analysis of masticatory efficiency by electromyographic activity of masticatory muscles after surgical treatment of zygomatic-orbital complex fractures. J Stomat Occ Med 2013. [DOI: 10.1007/s12548-013-0078-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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de Medeiros EHP, Pepato AO, Sverzut CE, Trivellato AE. Orbital abscess during endodontic treatment: a case report. J Endod 2012; 38:1541-3. [PMID: 23063232 DOI: 10.1016/j.joen.2012.06.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 06/25/2012] [Accepted: 06/30/2012] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Orbital infections may result in permanent morbidity because of the severity of infection. Furthermore, delayed diagnosis or treatment of orbital infections can lead to intracranial complications and even death. The majority of orbital infections develop from paranasal sinus infections, cutaneous infections, and periorbital trauma. Dacryocystitis and odontogenic infection are also accounted as potential etiologies but are scarcely reported in scientific literature. METHODS The patient revealed a history of having endodontic treatment on left maxillary second molar performed 2 weeks previously. Moreover, she exhibited signs of facial pain accompanied by sinusitis symptoms, fever, and nasal obstruction the week after this endodontic procedure. The patient presented proptosis, impairment of ocular motility to the right side, facial tenderness, palpebral erythema, and referred decreased visual acuity. Intraoral exam revealed root fragments of left maxillary first molar and an extensive carious lesion on left maxillary second molar. Computed tomography enabled the observation of frontal sinus, left-sided maxillary, opacity of sphenoidal and ethmoidal sinuses, and apical lesion of left maxillary first and second molars, all suggesting the presence of their apex in the maxillary sinus. In addition, images revealed ocular proptosis and presence of high-density areas suggestive of pus in the medial orbital wall region. RESULTS The patient was submitted to surgical drainage under general anesthesia approximately 8 hours after the clinical evaluation. CONCLUSIONS Early detection of orbital infection, proper diagnostic tests, and treatment may provide successful outcomes of this rarely occurring disease.
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Affiliation(s)
- Eduardo Henrique Pantosso de Medeiros
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Pepato AO, Yamaji MAK, Sverzut CE, Trivellato AE. Lower third molar infection with purulent discharge through the external auditory meatus. Case report and review of literature. Int J Oral Maxillofac Surg 2011; 41:380-3. [PMID: 22004947 DOI: 10.1016/j.ijom.2011.09.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 07/25/2011] [Accepted: 09/20/2011] [Indexed: 11/18/2022]
Abstract
This manuscript reports an uncommon case of inferior third molar facial abscess with purulent secretion drainage through the left external acoustic meatus. The patient's left external acoustic meatus was filled with a purulent secretion observed on a CT scan. He underwent surgery to drain the facial abscess. Despite facial abscesses being routine occurrences, the literature does not contain many case reports of odontogenic facial abscesses with drainage via the external acoustic meatus. These situations occur in two possible ways: multiple fissures in the anterior wall of the cartilaginous portion of the external acoustic meatus; and congenital defects that are occasionally present in the anterior-superior aspect of the external acoustic meatus, known as the foramen of Huschke, which allow communication between the external acoustic meatus and mandibular fossa. These defects may also predispose the patient to the spread of the infection or tumour from the external auditory canal to the infratemporal fossa and vice versa. No otological sequelae were observed in this case. The authors conclude that the hypothesis of bone malformation cannot be excluded, and affirm that any facial abscess requires appropriate and immediate treatment for adequate resolution, by removing the causal factor and providing systemic support.
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Affiliation(s)
- A O Pepato
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Ribeiro MC, Regalo SCH, Oliveira Pepato A, Siéssere S, de Souza LG, Sverzut CE, Trivellato AE. Bite force, electromyography, and mandible mobility during the 6-month period after surgical treatment for isolated fractures of the zygomatico-orbital complex. ACTA ACUST UNITED AC 2011; 111:e1-7. [DOI: 10.1016/j.tripleo.2010.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 10/26/2010] [Accepted: 11/08/2010] [Indexed: 10/18/2022]
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Abstract
BACKGROUND Myiasis is the invasion of living tissue of humans and other mammals by eggs or maggots of flies of the order of Diptera. It occurs mainly in the Tropics and is associated with inadequate public and personal hygiene. Oral myiases in an older man appears to be rare. OBJECTIVE To relate a case of oral myiases in a debilitated older man treated by mechanical removal of the maggots, identifying the adult insect that caused the infestation. METHODS The diagnosis of oral myiasis was established by the clinical examination and it was detected that the infestation involved only soft tissue and the sinus cavity. The patient was submitted to two mechanical removal of the visible maggots. RESULTS Total of 110 maggots was removed from the oral cavity of the patient and adult insects was identified as belonging to the Calliphoridae Family, Cochliomyia hominivorax species. The patient died two days after the second procedure by severe systemic complications. CONCLUSIONS The mechanic removal and the identification of the maggots must be adopted as soon as possible to prevent further tissue damage and bacterial infection in cases of oral myiasis. Special attention should be given to the debilitated old patients that are particularly susceptible to oral myiasis infestation.
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Affiliation(s)
- Michel Campos Ribeiro
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, Brazil.
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Sverzut CE, Trivellato AE, Sverzut AT, de Matos FP, Kato RB. Removal of a maxillary third molar accidentally displaced into the infratemporal fossa via intraoral approach under local anesthesia: report of a case. J Oral Maxillofac Surg 2009; 67:1316-20. [PMID: 19446223 DOI: 10.1016/j.joms.2008.09.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2008] [Accepted: 09/06/2008] [Indexed: 11/16/2022]
Affiliation(s)
- Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Sverzut CE, Lucas MA, Sverzut AT, Trivellato AE, Beloti MM, Rosa AL, de Oliveira PT. Bone repair in mandibular body osteotomy after using 2.0 miniplate system--histological and histometric analysis in dogs. Int J Exp Pathol 2008; 89:91-7. [PMID: 18336526 DOI: 10.1111/j.1365-2613.2007.00569.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The objective of this study was to evaluate the bone repair along a mandibular body osteotomy after using a 2.0 miniplate system. Nine adult mongrel dogs were subjected to unilateral continuous defect through an osteotomy between the mandibular 3rd and 4th premolars. Two four-hole miniplates were placed in accordance with the Arbeitgeimeinschaft für Osteosynthesefragen Manual. Miniplates adapted to the alveolar processes were fixed monocortically with 6.0-mm-length titanium alloy self-tapping screws, whereas miniplates placed near the mandible bases were fixed bicortically. At 2, 6 and 12 weeks, three dogs were sacrificed per period, and the osteotomy sites were removed, divided into three thirds (Tension Third, TT; Intermediary Third, IT; Compression Third, CT) and prepared for conventional and polarized light microscopy. At 6 weeks, while the CT repaired faster and showed bone union by woven bone formation, the TT and IT exhibited a ligament-like fibrous connective tissue inserted in, and connecting, newly formed woven bone overlying the parent lamellar bone edges. At 12 weeks, bone repair took place at all thirds. Histometrically, proportions of newly formed bone did not alter at TT, IT and CT, whereas significantly enhanced bone formation was observed for the 12-week group, irrespective of the third. The results demonstrated that although the method used to stabilize the mandibular osteotomy allowed bone repair to occur, differences in the dynamics of bone healing may take place along the osteotomy site, depending on the action of tension and compression forces generated by masticatory muscles.
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Affiliation(s)
- Cássio Edvard Sverzut
- Department of Oral and Maxillofacial Surgery and Periodontology, Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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dos Santos TI, de Oliveira PT, Rosa AL, da Rocha Barros VM, Papalexiou V, Sverzut CE. Histological and histomorphometric analysis of the bone-screw interface in the mandibular body after using a 2.0-mm miniplate system: an experimental study in dogs. J Oral Maxillofac Surg 2007; 65:2169-75. [PMID: 17954310 DOI: 10.1016/j.joms.2006.11.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2006] [Revised: 05/17/2006] [Accepted: 11/16/2006] [Indexed: 11/29/2022]
Abstract
PURPOSE To evaluate the bone-screw interface in a 2.0-mm miniplate system used for rigid internal fixation (RIF). MATERIALS AND METHODS Nine adult mongrel dogs were subjected to unilateral continuous defect through an osteotomy between the lower third and fourth premolars. The control contralateral side remained untreated. Two 4-hole miniplates were placed bilaterally according to the Arbeitgeimeinschaft für Osteosynthesefragen manual. Miniplates adapted to the alveolar processes were fixed monocortically with 6.0-mm-long titanium alloy screws, whereas miniplates placed near the mandible base were fixed bicortically. At 2, 6, and 12 weeks, mandible segments enclosing the RIF were removed, fixed in formalin, ground-sectioned, and stained with toluidine blue. Under conventional light microscopy, proportions of bone-to-screw contact (BSC) were determined, and data were compared by analysis of variance. RESULTS At 2 weeks, for both groups, the area between threads exhibited necrotic bone with multiple cracks and absence of bone cells and blood vessels. At 6 and 12 weeks, new Haversian systems progressively replaced necrotic bone. At each time point, no significant differences were seen between screws placed in the same miniplate or between groups. The proportions of BSC were statistically similar at 2 and 6 weeks and lower at 12 weeks. CONCLUSION The results suggested that in this model, osteotomy did not significantly alter bone repair adjacent to the screw surface.
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Affiliation(s)
- Thiago Iafelice dos Santos
- Department of Oral and Maxillofacial Surgery and Periodontology, Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Abstract
The aim of this study was to determine the biocompatibility and osteoconductive potential of a high-strength canasite glass ceramic. Glass-ceramic rods were produced using the lost-wax casting technique and implanted in the mid-shafts rabbit femurs. Implants were harvested at 4, 13 and 22 weeks and prepared for light and electron microscopy. Hydroxyapatite was used as a control material. Hydroxyapatite implants were surrounded by new mineralised bone tissue after 4 weeks of implantation. The amount of bone surrounding the implant increased slightly at 13 weeks. In contrast, canasite glass and glass ceramic implants were almost entirely surrounded by soft tissue during all the time periods. Close contact between bone and canasite glass-ceramic implant without the intervening fibrous tissue was observed in only a few regions. The canasite formulation evaluated was not osteoconductive and appeared to degrade in the biological environment. It was therefore concluded that the canasite formulation used was unsuitable for use as implant. Further work is required to improve the biocompatibility of these materials with bone tissue. It is possible that this could be achieved by reducing the solubility of the glass and glass ceramic.
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Rosa AL, Sverzut CE, Xavier SP, Lavrador MA. Clinical effectiveness of lidocaine and benzocaine for topical anesthesia. Anesth Prog 2002; 46:97-9. [PMID: 11692349 PMCID: PMC2148990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
The effectiveness of lidocaine and benzocaine in reducing pain produced by needle insertion into the palate was evaluated in a double-blind and placebo-controlled study using a more suitable method. Twenty subjects, 10 men and 10 women, submitted to 4 sessions in which they were randomly treated with 5% lidocaine, a placebo that tasted like lidocaine, 20% benzocaine, and a placebo that tasted like benzocaine. At each session, a 27-gauge needle was inserted into the palate twice, once before (baseline) and once after drug application for 1 minute. Immediately after each insertion, subjects indicated on a visual analog scale the pain intensity perceived. Lidocaine and benzocaine were equally efficient, and both were better than placebo in reducing pain caused by insertion of needles into the palate.
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Affiliation(s)
- A L Rosa
- Department of Oral and Maxillofacial Surgery and Periodontology, Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Brazil.
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Sverzut CE, Gabrielli MF, Vieira EH, Sverzut AT. [Radiographic assessment of the anterior height of the mandible after vestibuloplasty with the lipswitch technique: study with humans]. Pesqui Odontol Bras 2001; 15:133-7. [PMID: 11705195 DOI: 10.1590/s1517-74912001000200009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this study was to determine, through cephalometric analysis, the anterior height of the mandible after vestibuloplasty through the lipswitch technique. Thirteen patients (8 women and 5 men) with ages between 32 and 77 years (mean age of 54.3 years) were evaluated. The postoperative periods were 30, 90 and 180 days. During this time there was a reduction of 0.6 mm in the anterior height of the mandible, which was not significant.
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Affiliation(s)
- C E Sverzut
- Disciplina de Cirurgia, Faculdade de Odontologia de Ribeirão Preto da USP
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