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Dive into the research topics where Ricardo José de Holanda Vasconcellos is active.

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Featured researches published by Ricardo José de Holanda Vasconcellos.


Journal of Cranio-maxillofacial Surgery | 2012

Glandular odontogenic cyst: case report and review of diagnostic criteria

Hécio Henrique Araújo de Morais; Ricardo José de Holanda Vasconcellos; Thiago de Santana Santos; Lélia Maria Guedes Queiroz; Éricka Janine Dantas da Silveira

The glandular odontogenic cyst (GOC) is an uncommon jaw bone cyst of odontogenic origin with unpredictable and potentially aggressive behaviour. It also has the propensity to grow to a large size and tendency towards recurrence. GOC can be easily misdiagnosed microscopically as a central mucoepidermoid carcinoma. This paper reports a case of GOC in a 56-year-old male and reviews the main criteria for accurate diagnosis. The diagnosis of GOC can be extremely difficult due to the rarity of the cyst and lack of clear diagnostic criteria.


Journal of Oral and Maxillofacial Surgery | 2009

A New Approach for Reconstruction of a Severely Atrophic Mandible

Nadja Lopes; David Moraes de Oliveira; André Vajgel; Ivo Pita; Tácio Pinheiro Bezerra; Ricardo José de Holanda Vasconcellos

PURPOSE The purpose of this study is to report a case of a patient with a severely atrophic mandible (less than 5 mm) who was treated without bone graft using short implants and internal rigid fixation. PATIENT AND METHODS A 61-year-old woman was referred to a private clinic in the city of Recife (Brazil) with a severely resorbed mandible (less than 5 mm). The patient reported a history of nearly 15 years of complete edentulism and consecutive treatment failures. Cone beam tomography was performed and severe atrophy was confirmed, revealing total bilateral exposed inferior alveolar nerves. There was a high risk of pathologic mandible fracture, since bone density in critical areas was very low. Treatment of choice was the placement of 4 Shorty (3.75 x 5.5 mm) implants (Nobel Biocare, Göteborg, Sweden) at the symphysis for immediate functional reasons and a 2.0-mm large profile Unilock bone plate (Synthes Maxillofacial, Paoli, PA) to reinforce the mandible. A rapid prototype model was made to help precontour the plate, enabling the insertion of the plate through the transoral approach. RESULTS A week after surgery, a Brånemark prosthesis protocol was performed and the patient was satisfied with the result. At 29 months after surgery, the patient was still satisfied and had excellent function without complications. CONCLUSIONS Because of the reported advances in implantology and internal rigid fixation, more patients would be able to improve their severe dental condition without the use of more invasive techniques.


Journal of Cranio-maxillofacial Surgery | 2012

Comparative analysis of preemptive analgesic effect of tramadol chlorhydrate and nimesulide following third molar surgery

Fábio Andrey da Costa Araújo; Thiago de Santana Santos; Hécio Henrique Araújo de Morais; José Rodrigues Laureano Filho; Emanuel Dias de Oliveira e Silva; Ricardo José de Holanda Vasconcellos

The aim of this prospective, randomized, controlled, paired trial was to perform a comparative analysis of the preemptive analgesic effect of nimesulide and tramadol chlorhydrate during third molar surgery. The study was carried out between March and November 2009, involving 94 operations in 47 male and female patients with bilateral impacted lower third molars in comparable positions. The sample was divided into two groups. Group A received an oral dose of 100 mg of nimesulide 1 h prior to surgery. Group B received an oral dose of 100 mg of tramadol chlorhydrate 1 h prior to surgery. The following aspects were evaluated in the postoperative period: adverse effects of the drugs; amount of rescue medication used (acetaminophen 750 mg); and pain 5, 6, 24, 36, 48, 60, 72 and 84 h after surgery using a visual analog pain scale. Peak pain occurred 5 h after surgery in both groups, with a mean pain score of 2.3 in Group A and 3.0 in Group B; this difference did not achieve statistical significance (p > 0.141). Based on the sample studied, nimesulide and tramadol chlorhydrate demonstrate similar preemptive analgesic effects when used in lower third molar surgeries.


Journal of Oral and Maxillofacial Surgery | 2013

Comparative Finite Element Analysis of the Biomechanical Stability of 2.0 Fixation Plates in Atrophic Mandibular Fractures

André Vajgel; Igor Batista Camargo; Ramiro Brito Willmersdorf; Tiago Menezes de Melo; José Rodrigues Laureano Filho; Ricardo José de Holanda Vasconcellos

PURPOSE The objective of the present study was to conduct a computational, laboratory-based comparison of the biomechanical stability of 2.0 fixation locking plates with different profiles in Class III atrophic mandibular fractures using 3-dimensional finite element analysis. MATERIALS AND METHODS Three-dimensional finite element models simulating Class III atrophic mandibular fractures were constructed. The models were divided into 4 groups according to plate thickness (1.0, 1.5, 2.0, and 2.5 mm). Fractures were simulated in left mandibular bodies, and 3 locking screws were used on each side of each fracture for fixation. Bite forces of approximately 63 N were simulated in the incisor and molar regions of the mandibles in finite element models. RESULTS The level of compressive strain on the bone around the screw was within the physiological limit. No significant difference was observed in the displacement of bone segments in the fracture region. Von Mises stress was higher during simulated bites in the molar region for plates with thicknesses of 1.0 mm. Plate tension values were below the level required for permanent deformation or fracture in all models. The 2.5-mm-thick plate presented better biomechanical performance than all other plates. The 2.0-mm-thick plate also showed satisfactory results and adequate safety limits. CONCLUSION Large-profile (2.0-mm-thick) locking plates showed better biomechanical performance than did 1.0- and 1.5-mm-thick plates and can be considered an alternative reconstruction plate for the treatment of Class III atrophic mandibular fractures.


Pesquisa Odontológica Brasileira | 2003

Conduction velocity of the rabbit facial nerve: a noninvasive functional evaluation

Belmiro Cavalcanti do Egito Vasconcelos; Ricardo José de Holanda Vasconcellos; Riedel Frota Sá Nogueira Neves

The aim of this study was to evaluate standardized conduction velocity data for uninjured facial nerve and facial nerve repaired with autologous graft nerves and synthetic materials. An evaluation was made measuring the preoperative differences in the facial nerve conduction velocities on either side, and ascertaining the existence of a positive correlation between facial nerve conduction velocity and the number of axons regenerated postoperatively. In 17 rabbits, bilateral facial nerve motor action potentials were recorded pre- and postoperatively. The stimulation surface electrodes were placed on the auricular pavilion (facial nerve trunk) and the recording surface electrodes were placed on the quadratus labii inferior muscle. The facial nerves were isolated, transected and separated 10 mm apart. The gap between the two nerve ends was repaired with autologous nerve grafts and PTFE-e (polytetrafluoroethylene) or collagen tubes. The mean of maximal conduction velocity of the facial nerve was 41.10 m/s. After 15 days no nerve conduction was evoked in the evaluated group. For the period of 2 and 4 months the mean conduction velocity was approximately 50% of the normal value in the subgroups assessed. A significant correlation was observed between the conduction velocity and the number of regenerated axons. Noninvasive functional evaluation with surface electrodes can be useful for stimulating and recording muscle action potentials and for assessing the functional state of the facial nerve.


Oral Surgery, Oral Medicine, Oral Pathology, and Oral Radiology | 2013

Clinical study of hemodynamic changes comparing 4% articaine hydrochloride with 1:100,000 and 1:200,000 epinephrine

Hécio Henrique Araújo de Morais; Ricardo José de Holanda Vasconcellos; Thiago de Santana Santos; Nelson Studart Rocha; Fábio Andrey da Costa Araújo; Ricardo Wathson Feitosa de Carvalho

OBJECTIVE To evaluate hemodynamic changes with the use of 4% articaine and 2 different concentrations of epinephrine (1:100,000 and 1:200,000) in the surgical removal of symmetrically positioned lower third molars. STUDY DESIGN A prospective, randomized, double-blind clinical trial was carried out involving 42 patients each undergoing 2 surgeries on separate occasions under local anesthesia with 4% articaine and either epinephrine 1:100,000 or 1:200,000. The following parameters were assessed at 4 different moments: systolic, diastolic, and mean blood pressure; heart rate; oxygen saturation; rate pressure product (RPP); and pressure rate quotient (PRQ). RESULTS The concentration of epinephrine did not affect diastolic blood pressure or oxygen saturation during the surgeries. Significant differences between were detected for heart rate, RPP, and PRQ (P < .05). CONCLUSIONS The epinephrine concentration (1:100,000 or 1:200,000) in a 4% articaine solution influences hemodynamic parameters without perceptible clinical changes in healthy patients undergoing lower third molar removal.


Brazilian Dental Journal | 2007

Fracture of the coronoid and pterygoid processes by firearms: case report

David Moraes de Oliveira; Ricardo José de Holanda Vasconcellos; José Rodrigues Laureano Filho; Rafael Vago Cypriano

A rare case of fracture of the coronoid and the pterygoid process caused by firearms is described. A 28-year-old male was hit by a bullet in the face, resulting in restricted mouth opening, difficulty in chewing and pain when opening the mouth. Clinical examination revealed a perforating wound in the right parotid region and a similar wound on the left side of the same region. A CT scan showed comminuted fracture of the left coronoid process and bilateral comminuted fracture of the pterygoid processes. Treatment was conservative, speech therapy was conducted and it was successful. Details of the clinical signs, radiology (3D-CT scan), treatment and follow-up are presented.


Journal of Craniofacial Surgery | 2012

Hemodynamic Changes Comparing Lidocaine HCl With Epinephrine and Articaine HCl With Epinephrine

Hécio Henrique Araújo de Morais; Thiago de Santana Santos; Fábio Andrey da Costa Araújo; André Vajgel; Ricardo José de Holanda Vasconcellos

Background The aim of the present study was to analyze hemodynamic changes after the administration of either 2% lidocaine with epinephrine 1:100,000 (L100) or 4% articaine with epinephrine 1:200,000 (A200) in the surgical removal of symmetrically positioned lower third molars. Methods A prospective, randomized, double-blind, clinical trial was carried out involving 43 patients. Each patient underwent 2 surgeries on different occasions—one under local anesthesia with L100 and the other with A200. The following parameters were assessed at 4 different times: systolic, diastolic, and mean blood pressure; heart rate; oxygen saturation; rate pressure product (RPP); and pressure rate quotient (PRQ). Results No hypertensive peak was observed in systolic, diastolic, and mean blood pressure at any evaluation time. Moreover, the type of anesthetic solution did not affect diastolic blood pressure, oxygen saturation or PRQ during the surgeries. Statistically significant differences between groups were detected with regard to heart rate and RPP (P < 0.05). Conclusions The epinephrine concentration (1:100,000 or 1:200,000) and local anesthetic solutions used (2% lidocaine or 4% articaine) influenced hemodynamic parameters without perceptible clinical changes in healthy patients undergoing lower third molar removal.


Journal of Cranio-maxillofacial Surgery | 2015

Treatment of condylar fractures with an intraoral approach using an angulated screwdriver: Results of a multicentre study

André Vajgel; Thiago de Santana Santos; Igor Batista Camargo; David Moraes de Oliveira; José Rodrigues Laureano Filho; Ricardo José de Holanda Vasconcellos; Sergio Monteiro Lima; Valfrido Antonio Pereira Filho; A.A. Mueller; Philipp Juergens

BACKGROUND This multicentre study aimed to investigate long-term radiographic and functional results following the treatment of condylar fractures using an angulated screwdriver system and open rigid internal fixation with an intraoral surgical approach. METHODS Twenty-nine patients with a total of 32 condylar fractures were evaluated. The patients were investigated prospectively based on the following variables: age, sex, aetiology, side, location and classification of the fracture, degree of displacement, associated fractures, surgical approach, oral health status, type of osteosynthesis plate, duration of surgery, mouth-opening, complications, and duration of follow-up. RESULTS The fractures were classified as subcondylar (n = 25) or condylar neck (n = 7). Mean patient age was 36.38 ± 16.60 years. The median duration of postoperative follow-up was 24.39 ± 13.94 months. No joint noise, weakness of the facial nerve, joint pain, or muscle pain was observed. An additional retromandibular approach was necessary to enable the treatment of one subcondylar fracture with medial displacement. CONCLUSION Subcondylar or condylar neck fractures with medial or lateral displacement can be treated using an intraoral approach with satisfactory results with the advantages of the absence of visible scarring, the avoidance of facial nerve injury, and the ability to obtain rapid access to the fracture.


International Journal of Oral and Maxillofacial Surgery | 2017

Effects of co-administered dexamethasone and nimesulide on pain, swelling, and trismus following third molar surgery: a randomized, triple-blind, controlled clinical trial

Jimmy Charles Melo Barbalho; Ricardo José de Holanda Vasconcellos; H.H. de Morais; Lucas Alexandre de Morais Santos; R. de A.C. Almeida; H.L. Rêbelo; Eudes Euler de Souza Lucena; S.Q. de Araújo

This study aimed to determine the effect of the co-administration of dexamethasone 8mg and nimesulide 100mg given 1h before mandibular third molar surgery. A prospective, randomized, triple-blind, split-mouth clinical trial was developed at the study institution in Pernambuco, Brazil. A pilot study was first performed (95% confidence interval, 80% test power, and 5% error), and a sample of 40 patients aged between 18 and 40 years was selected. The patients were randomized and divided into two groups: dexamethasone+placebo and dexamethasone+nimesulide. The following parameters were evaluated: pain (visual analogue scale), total number of rescue analgesics taken, time taken to first rescue analgesic consumption, oedema, trismus, and patient satisfaction. The paired t-test and the Wilcoxon test were used to compare means. Statistically significant differences were found between the groups in pain values at 2, 4, and 12h postoperative, and in the total number of rescue analgesics and time taken to first rescue analgesic ingestion (P<0.05), with results in favour of dexamethasone+nimesulide administration. Oedema and trismus were similar in the two treatment groups and decreased over time postoperatively. The co-administration of dexamethasone and nimesulide reduces pain intensity and the need for rescue medication after third molar surgery.

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Thiago de Santana Santos

Universidade Federal de Sergipe

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