Evaluation of mandibular implant sites: correlation between panoramic and linear tomography

• Published in: Brazilian dental journal 2003, Vol.14 (3), p.209-213
• Main Authors: Rockenbach, Maria Ivete Bolzan, Sampaio, Maria Carméli Correia, Costa, Lino João da, Costa, Nilza Pereira da
• Format: Article
• Language: English
• Subjects: implants; linear tomography; mandible; panoramic radiography
• ISSN: 0103-6440; 0103-6440
• DOI: 10.1590/S0103-64402003000300013

The reliability of the linear tomography and panoramic radiography made with X-ray equipment was evaluated (Vera View Scope X-600; Morita). The sample was composed of 20 dry human hemimandibles, in which the area selected for analysis was 1.5 cm distal from the limit set before the mental foramen. Four measurements were made. The images obtained were drawn on acetate paper and the hemimandibles cut at the demarcated area. The measurements were made using a digital electronic pachymeter. The values found for the radiographic images were compared to those obtained in the mandibular specimens and submitted to statistical evaluation by the Wilcoxon test. It was concluded that both techniques were reliable for the accomplishment of vertical linear measurements in the selected area. However, a 2.0 mm safety margin is recommended. Objetivando a análise de sítios para colocação de implantes, avaliou-se a confiabilidade da tomografia linear e da radiografia panorâmica realizadas com o equipamento de raios-X Vera View Scope X-600 (Morita). A amostra constituiu-se de 20 hemimandíbulas humanas secas, cuja área selecionada localizou-se a 1,5 cm para distal do limite anterior do forame mental. Quatro medidas foram estabelecidas. As imagens obtidas foram traçadas em papel acetato e as hemimandíbulas seccionadas na região demarcada. As mensurações foram realizadas com a utilização de um paquímetro eletrônico digital (Starret). Os valores encontrados nas imagens radiográficas foram comparados com aqueles obtidos nos espécimes mandibulares e submetidos a avaliação estatística pelo teste de Wilcoxon. Concluiu-se que ambas as técnicas são confiáveis para a realização de medidas lineares verticais na área selecionada, no entanto, recomenda-se a utilização de uma margem de segurança de 2,0 mm.