The both graft materials improved the bone volumetric ability to anchorage a dental implant. Moreover, the mixture of HA and autogenous bone graft showed lower degree of resorption and higher dimensional stability when compared with autogenous bone graft alone, at least at 180 days of healing. The CT exam protocol should be used as an important tool to measure bone grafts volumetric alterations.
This study demonstrated that there is no sufficient evidence to support the thesis that the volume of the maxillary sinus influences the contraction of the grafts, at least on sample or the biomaterials evaluated in this cohort study.
Este estudo teve como objetivo avaliar a associação da condição periodontal materna na ocorrência de parto pré-termo e baixo peso ao nascimento de (PTBPN). Participaram do estudo 236 mulheres, com a média de 25 anos de idade e características socioeconômicas semelhantes, que deram à luz em uma instituição de saúde pública de Belo Horizonte (MG - Brasil). Os dados maternos, obstétricos e pediátricos foram obtidos nos prontuários médicos. O exame periodontal foi realizado no período de internação pós-parto, em seis sítios ao redor de todos os dentes presentes e incluiu a avaliação dos parâmetros clínicos profundidade de sondagem (PS), nível clínico de inserção (NIC) e sangramento à sondagem (SS). Para a análise considerou-se como caso
de doença periodontal a presença de um sítio com PS e NIC e” 4 mm. Não houve diferenças significantes quando da análise das variáveis raça, escolaridade, prematuridade prévia, diabetes, infecção geniturinária, consumo de álcool, hábito de fumar e doença periodontal. O teste Qui-quadrado mostrou significância estatística para os fatores de risco hipertensão (p=0,016) e consumo de drogas ilícitas (p=0,017). Já o teste t Student mostrou significância estatística para a variável idade (p=0,010). Na análise multivariada somente o consumo de drogas ilícitas mostrou-se significativo: elevou de 25% para 66,7% a ocorrência de
PTBPN. Esses resultados demonstraram que a condição periodontal materna não apresentou associação estatisticamente significativa com a ocorrência de PTBPN (p= 0,364).
The GEISTLICH BIO-OSS and STRAUMANN BONECERAMIC interposition grafts exhibited similar and sufficient dimensional stability and volume gain for short implants in the atrophic posterior mandible.
This study aimed to compare the primary and secondary stability, measured by resonance frequency analysis (RFA), in implants of different lengths installed in areas submitted to maxillary sinus lift. Correlation between RFA and implant insertion torque was also assessed. Twenty implants of 9 and 11 mm were inserted in areas submitted to maxillary sinus lift. The insertion torque was measured by the Bien Air motor. Osstell, through RFA, determined the implant stability quotient (ISQ) 2 times: the day of implant installation (T1) and 90 days after implant installation (T2). No differences were observed in the ISQ between T1 and T2 when the 20 implants were grouped, nor when the 9 mm implants were evaluated separately. In contrast, when the 11 mm values were evaluated separately, the ISQ was significantly higher in T2 than in T1 ( P < .05). In T1, 9 mm implants had a higher ISQ than 11 mm ones ( P < .05), whereas in T2, the implants of 11 mm showed a higher ISQ than did the 9 mm implants ( P < .05). There was no difference in insertion torque between 9 and 11 mm implants ( P > .05), nor was there a correlation between ISQ and insertion torque ( P > .05). In conclusion, longer implants (11 mm) presented a significant increase in ISQ values during the healing period when installed in areas previously submitted to maxillary sinus lift. This phenomenon was not observed for shorter implants (9 mm). Finally, no correlation was observed between ISQ and insertion torque.
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