Abstract The objective of this study was to analyze the influence of insertion torque, bone type, and peri-implant bone loss on implant stability quotient (ISQ) of cylindrical external hexagon (EH) and Morse Taper (MT) implants. Forty-four single implants were placed in the edentulous areas of 20 patients who met the inclusion and exclusion criteria. Immediately after implant placement (t1) and after osseointegration (four and six months for mandible and maxilla, respectively) (t2), insertion torque, resonance frequency, and peri-implant bone loss were measured using probing depths and digital periapical radiography. A significant difference was noted in the ISQ values between t1 and t2 in type III bone for EH and MT implants. No significant difference in bone loss values was observed when comparing bone types for EH or MT in all evaluated sites. Based on marginal bone loss assessed using radiography, there was no significant difference between the MT and EH groups. A positive correlation between torque and ISQ t1 value was observed for MT (correlation: 0.439; p = 0.041) and EH (correlation: 0.461; p = 0.031) implants. For EH and MT implants, the greater the insertion torque, the greater was the ISQ value (moderately positive correlation). A weak negative correlation was found between bone type and ISQ t1 for MT implants. Contrarily, no correlation was observed between bone type and ISQ t1 for EH implants. In all cases, bone loss around the implants was clinically normal. periimplant peri (ISQ (EH (MT Fortyfour Forty four 2 criteria t (t1 maxilla respectively t2, , (t2) frequency radiography sites groups (correlation 0.439 0439 0 439 0.041 0041 041 0.461 0461 461 0.031 0031 031 moderately correlation. . correlation) Contrarily cases normal (t (t2 0.43 043 43 0.04 004 04 0.46 046 46 0.03 003 03 0.4 4 0.0 00 0.

Abstract Introduction with the technological advance in dentistry, light-polymerized three-dimensional (3D) printing resins had become an alternative for the manufacture of occlusal splint splints. Objective the present study aimed to analyze the flexural strength of a resin for 3D printing compared to conventional acrylic resins (chemically activated and thermally activated), under the influence of thermocycling. Material and method 60 specimens were made, which were distributed in six experimental groups (n = 10), according to the resin employed (chemically activated acrylic resin, thermally activated acrylic resin and 3D printing resin) and the treatment received (control and thermocycling). The specimens were submitted to flexural strength by the three-point flexural test. Result data analysis showed that the material factor (<0.0001) and the thermocycling factor (p = 0.0096) influenced flexural strength, however, the interaction between the two factors did not (p = 0.9728). Conclusion it was concluded that 3D printing resins presented the lowest flexural resistance to acrylic resins, especially when submitted to thermocycling. dentistry lightpolymerized light polymerized threedimensional three dimensional D (3D splints chemically activated, , activated) 6 made n 10, 10 10) control . thermocycling) threepoint point test <0.0001 00001 0 0001 (<0.0001 p 0.0096 00096 0096 however 0.9728. 09728 0.9728 9728 0.9728) 1 <0.000 0000 000 (<0.000 0.009 0009 009 0972 0.972 972 <0.00 00 (<0.00 0.00 097 0.97 97 <0.0 (<0.0 0.0 09 0.9 9 <0. (<0. 0. <0 (<0 < (< (

Resumo Introdução com o avanço tecnológico dentro da odontologia, as resinas fotopolimerizáveis para impressão tridimensional (3D) se tornaram uma alternativa para a fabricação de dispositivos interoclusais. Objetivo o presente trabalho teve como objetivo analisar a resistência flexural de uma resina para impressão tridimensional comparada com resinas acrílicas convencionais (quimicamente ativada e termicamente ativada), sob a influência da termociclagem. Material e método foram confeccionados 60 corpos de prova, que foram distribuídos aleatoriamente em seis grupos experimentais (n=10), de acordo com a resina utilizada (resina acrílica ativada quimicamente, resina acrílica ativada termicamente e resina para impressão 3D) e com o tratamento recebido (controle e termociclagem). Os corpos de prova foram submetidos ao ensaio de flexão de três pontos para determinação da resistência flexural. Resultado a análise dos dados demonstrou que o fator material (<0.0001) e o fator termociclagem (p=0.0096) influenciaram a resistência flexural, entretanto, a interação entre os dois fatores não (p=0.9728). Conclusão deste modo podemos concluir que a resina para impressão 3D apresentou desempenho inferior às resinas acrílicas, especialmente quando submetida a termociclagem. odontologia D (3D interoclusais quimicamente ativada, , ativada) 6 n=10, n10 n n=10 10 (n=10) controle . termociclagem) <0.0001 00001 0 0001 (<0.0001 p=0.0096 p00096 p 0096 (p=0.0096 entretanto p=0.9728. p09728 p=0.9728 9728 (p=0.9728) n1 n=1 1 (n=10 <0.000 0000 000 (<0.000 p=0.009 p0009 009 (p=0.009 p0972 p=0.972 972 (p=0.9728 n= (n=1 <0.00 00 (<0.00 p=0.00 p000 (p=0.00 p097 p=0.97 97 (p=0.972 (n= <0.0 (<0.0 p=0.0 p00 (p=0.0 p09 p=0.9 9 (p=0.97 (n <0. (<0. p=0. p0 (p=0. (p=0.9 <0 (<0 p=0 (p=0 < (< p= (p= ( (p

Abstract In this study, we aimed to evaluate the halitosis and pain threshold of the peri-implant soft tissues in individuals rehabilitated with implant-supported prostheses. Forty-eight subjects were divided into four groups (n = 12) according to their prosthetic rehabilitation: single-tooth fixed prosthesis, multi-tooth fixed prosthesis, overdentures, and the Brånemark protocol. Halitosis was measured using a halimeter, whereas the pain threshold was measured using Von Frey monofilaments. Measurements were taken before (t0) and 30 days after (t1) placement of healing caps, and at the time of (t2) and 30 days after (t3) prosthetic placement. Halitosis data were analyzed using the chi-square test and Bonferroni correction (p < 0.05). Two-way ANOVA and Tukey’s test (p < 0.05) were used to analyze pain threshold data. We noted an association between halitosis and time for the Brånemark protocol [X2(6) = 18.471; p = 0.005] and overdenture groups [X2(6) = 17.732; p = 0.007], and between halitosis and type of prosthesis only at t0 [X2(6) = 12.894; p = 0.045]. The interaction between time and the type of prosthesis significantly interfered with the mean pain threshold values (p = 0.001). At most time points, the majority of participants in each group had clinically unacceptable halitosis. After 30 days of using the prostheses, the overdenture group had a lower pain threshold compared to the Brånemark protocol group. study periimplant peri implant implantsupported supported prostheses Fortyeight Forty eight n 12 rehabilitation singletooth single tooth multitooth multi overdentures halimeter monofilaments t (t0 3 t1 (t1 caps t2 (t2 t3 (t3 chisquare chi square 0.05. 005 0.05 . 0 05 Twoway Two way Tukeys Tukey s X26 X X2 6 [X2(6 18.471 18471 18 471 0.005 0005 17.732 17732 17 732 0.007, 0007 0.007 , 007 0.007] 12.894 12894 894 0.045. 0045 0.045 045 0.045] 0.001. 0001 0.001 001 0.001) points 1 (t 00 0.0 [X2( 18.47 1847 47 0.00 000 17.73 1773 73 12.89 1289 89 004 0.04 04 0. [X2 18.4 184 4 17.7 177 7 12.8 128 8 [X 18. 17. 12.

Resumo Este estudo teve como objetivo avaliar a halitose e o limiar de dor dos tecidos moles peri-implantares em indivíduos reabilitados com próteses implantossuportadas. Um total de 48 indivíduos foram divididos em quatro grupos (n=12), de acordo com as reabilitações: prótese fixa unitária, prótese fixa multidentária, sobredentadura e protocolo de Brånemark. A halitose foi medida com um halímetro, enquanto o limiar de dor foi medido com monofilamentos de von Frey. As medições foram feitas antes (t0) e 30 dias após (t1) a colocação das tampas de cicatrização e no momento (t2) e 30 dias após (t3) a colocação da prótese. Os dados de halitose foram analisados por meio do teste qui-quadrado e correção de Bonferroni (p < 0,05). ANOVA de duas vias e o teste de Tukey (p < 0,05) foram usados para analisar os dados do limiar de dor. Observou-se associação entre halitose e tempo para o protocolo de Brånemark [X2(6) = 18,471; p = 0,005] e grupos overdenture [X2(6) = 17,732; p = 0,007], e entre halitose e tipo de prótese apenas em t0 [X2(6) = 12,894; p = 0,045]. A interação entre o tempo e o tipo de prótese interferiu significativamente nos valores médios do limiar de dor (p = 0,001). Na maioria dos pontos de tempos, a maioria dos participantes de cada grupo apresentava halitose clinicamente inaceitável. Após 30 dias de uso das próteses, o grupo overdenture apresentou menor limiar de dor em comparação ao grupo do protocolo de Brånemark. periimplantares peri implantares implantossuportadas 4 n=12, n12 n n=12 , 12 (n=12) reabilitações unitária multidentária halímetro Frey t (t0 3 t1 (t1 t2 (t2 t3 (t3 quiquadrado qui quadrado 0,05. 005 0,05 . 0 05 Observouse Observou se X26 X X2 6 [X2(6 18,471 18471 18 471 0,005 0005 17,732 17732 17 732 0,007, 0007 0,007 007 0,007] 12,894 12894 894 0,045. 0045 0,045 045 0,045] 0,001. 0001 0,001 001 0,001) tempos inaceitável n1 n=1 1 (n=12 (t 00 0,0 [X2( 18,47 1847 47 0,00 000 17,73 1773 73 12,89 1289 89 004 0,04 04 n= (n=1 0, [X2 18,4 184 17,7 177 7 12,8 128 8 (n= [X 18, 17, 12, (n