Fernando Vacilotto Gomes scite author profile

Traumatic dentoalveolar injuries are frequent in children and adolescents, affecting teeth, their supporting structures and adjacent soft tissues and contributing to the appearance of major psychosocial and economic problems. Tooth avulsion, the most severe dentoalveolar lesion, is a dental emergency. The prognosis of avulsed teeth significantly depends on prompt and efficient action at the site of the accident, thus requiring that parents or caretakers be knowledgeable about the correct management of this situation. The objective of the present study was to assess the level of knowledge of parents or caretakers concerning the management of tooth avulsion and to investigate the association between level of knowledge and schooling, monthly family income and age. We interviewed 107 parents or caretakers using a 12-item questionnaire comprising objective questions whose answers received a score from 0 to 3. The results show that 99% of those interviewed would immediately seek professional help; however, 71% did not know what avulsion was. Only 3% would use milk as storage medium and 16% would attempt replantation of the avulsed tooth. The distribution of final means for the overall level of parent or caretaker knowledge was 44.63% for score 3, 15.88% for score 2, 17.99% for score 1 and 21.47% for score 0, showing a low level of knowledge concerning tooth avulsion. Schooling, monthly family income and age were not associated with the knowledge scores for any of the 12 questions. The level of parent and caretaker knowledge concerning the management of tooth avulsion is low, without association with age, schooling and monthly family income.

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Low-level laser therapy improves peri-implant bone formation: resonance frequency, electron microscopy, and stereology findings in a rabbit model

Gomes

Mayer

Massotti

et al. 2015

International Journal of Oral and Maxillofacial Surgery

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Peri-implant osseointegration after low-level laser therapy: micro-computed tomography and resonance frequency analysis in an animal model

et al. 2016

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The purpose of the present study is to evaluate the effects of low-level laser therapy on the osseointegration process by comparing resonance frequency analysis measurements performed at implant placement and after 30 days and micro-computed tomography images in irradiated vs nonirradiated rabbits. Fourteen male New Zealand rabbits were randomly divided into two groups of seven animals each, one control group (nonirradiated animals) and one experimental group that received low-level laser therapy (Thera Lase®, aluminum-gallium-arsenide laser diode, 10 J per spot, two spots per session, seven sessions, 830 nm, 50 mW, CW, Ø 0.0028 cm). The mandibular left incisor was surgically extracted in all animals, and one osseointegrated implant was placed immediately afterward (3.25ø × 11.5 mm; NanoTite, BIOMET 3i). Resonance frequency analysis was performed with the Osstell® device at implant placement and at 30 days (immediately before euthanasia). Micro-computed tomography analyses were then conducted using a high-resolution scanner (SkyScan 1172 X-ray Micro-CT) to evaluate the amount of newly formed bone around the implants. Irradiated animals showed significantly higher implant stability quotients at 30 days (64.286 ± 1.596; 95 % confidence interval (CI) 60.808-67.764) than controls (56.357 ± 1.596; 95 %CI 52.879-59.835) (P = .000). The percentage of newly formed bone around the implants was also significantly higher in irradiated animals (75.523 ± 8.510; 95 %CI 61.893-89.155) than in controls (55.012 ± 19.840; 95 %CI 41.380-68.643) (P = .027). Laser therapy, based on the irradiation protocol used in this study, was able to provide greater implant stability and increase the volume of peri-implant newly formed bone, indicating that laser irradiation effected an improvement in the osseointegration process.

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Histomorphometric Assessment of the Influence of Low-Level Laser Therapy on Peri-Implant Tissue Healing in the Rabbit Mandible

Massotti

Gomes

Mayer

et al. 2015

Photomedicine and Laser Surgery

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Objective: The purpose of this study was to demonstrate the effect of low-level laser therapy (LLLT) on the peri-implant bone healing process in the rabbit mandible. Background data: LLLT has been shown to accelerate tissue repair and osseointegration of implants placed into the rabbit tibia. However, the beneficial effects of LLLT have never been tested in the rabbit mandible, which would more closely mimic the human situation. Materials and methods: Twenty-four male New Zealand rabbits were randomly divided into four groups of six animals each. All animals had their left mandibular incisors extracted, followed by immediate insertion of a titanium dental implant in the fresh socket. Three groups received LLLT [aluminum-galliumarsenide (AlGaAs), k = 830nm, 50 mW, continuous wave (CW)] at three different energy densities per treatment session (E-5, 5 J/cm 2 ; E-10, 10 J/cm 2 ; and E-20, 20 J/cm 2 ). Irradiation was performed every 48 h for 13 days, totaling seven sessions. One group received sham treatment (controls). Histological sections were obtained from each of the 24 mandibles dissected, without first decalcifying the specimens, and were stained with hematoxylin and eosin and Picrosirius red for histomorphometric evaluation. Bone-to-implant contact (BIC), bone formation area, and collagen fiber area were assessed by light microscopy. Results: Significant differences were found between group E-20 and all other groups ( p < 0.05). Histomorphometric evaluation showed significantly higher BIC and significantly more collagen fibers in group E-20. Conclusions: Photobiostimulation with LLLT at an energy density of 20 J/cm 2 per session had a significant positive effect on new bone formation around dental implants inserted in the rabbit mandible.

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Oral Myiasis

Martins¹,

Freddo²,

Gomes³

et al. 2012

Journal of Craniofacial Surgery

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Metodologia para avaliação do efeito sistêmico e local da LLLT na osseointegração de implantes dentários em mandíbula de coelhos: nota prévia

Mayer¹,

Oliveira²,

Massotti³

et al. 2014

Rev. da Fac. de Odontologia, UPF

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Knowledge of dental students of avulsed permanent teeth

Habekost

Miotto

Gomes

et al. 2010

cmbio

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<span style="font-size: 11pt; font-family: " lang="EN-US">The survival of an avulsed permanent tooth depends on the management and the appropriate treatment of the injury by the dental surgeon. The aim of this study was to assess the knowledge of first-year and last-year dental undergraduates on guidelines for management and treatment of tooth avulsion. A 10-item multiple-choice questionnaire was distributed among 65 first-year and 60 last-year dental undergraduates at the School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Brazil, between 2006 and 2007. Answers were graded 0 to 3. The results revealed a low level of knowledge among first-year and last-year students on the management and treatment of permanent avulsed teeth. Knowledge of last-year undergraduates of tooth avulsion was lower than what is required for a future dental surgeon. In conclusion, there is a need to improve the knowledge of dental students in the guidelines for the management of tooth avulsion. Because tooth avulsion is the most prevalent lesion in dentoalveolar traumas, it is of the utmost importance that dental surgeons be prepared to treat it properly, avoiding damage to neighboring teeth and structures, and esthetic, functional, psychosocial and therapeutic implications for the patient.</span>

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Assessment of LLLT systemic effects on thyroid hormones function after dental titanium implant installation: An experimental rabbit model

Mayer¹,

Gomes²,

Baraldi³

et al. 2013

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This study aimed to assess the systemic effect of LLLT on thyroid gland functioning and consequently on calcium regulation through Triiodothyronine (T 3) and Thyroxine (T 4) measurements in rabbits' serum. A total of thirty two New Zealand male rabbits were randomly distributed in four groups with eight animals each: control group C (nonirradiated animals), group EI (5 J/cm 2 per session), group EII (10 J/cm 2 per session) and group EIII (20 J/cm 2 per session). All animals underwent lower left incisor extraction followed by immediate insertion of an osseintegrated implant, providing an equality of initial clinical condition between the groups. The experimental groups were irradiated with aluminium gallium arsenide diode laser (GaAlAs, λ = 830 nm, 50 mW, CW), during 13 days at each 48 hours, totalizing 7 sessions. Laboratorial T 3 and T 4 measurements were done in four distinct moments (before surgical procedure, immediately after surgical procedure, after the first LLLT session and after the last LLLT session) in all animals. The results obtained showed statistically significant differences in Triiodothyronine values between the groups throughout the experiment. It was concluded that the LLLT, in the protocol of irradiation used in this study, promoted a significantly alteration on rabbits' serum hormonal levels.

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