Maxillary sinus floor pneumatization and alveolar ridge resorption after tooth loss: a cross-sectional study

Abstract This is a cross-sectional study that aimed to estimate maxillary sinus floor (MSF) pneumatization in single missing tooth of posterior maxilla, by using cone-beam computed tomography (CBCT). CBCT images were analyzed bilaterally and divided into 2 groups: edentulous site (EdS) - edentulous single region of upper second premolar, first or second molars; Tooth site (TS) - contralateral region homologous to the EdS region, with tooth present. Variables evaluated were: sinus height (SH), estimated sinus pneumatization (eSP: ∆ EdS - TS), healed ridge height (HR) and presence of localized sinus pneumatization (LSP) in molars teeth at TS. HR were categorized according to therapeutic option for posterior maxilla. 183 CBCT scans were included and it was observed that EdS presented a higher SH than the TS (p < 0.001) showing an eSP of 0.9 ± 2.93 mm. First molars presented the highest SH for both sides, although significant differences were detected when compared to second molars. First molars were mostly affected by LSP at TS (36 out of 43). Individuals with LSP at TS presented lower HR than the ones without LSP (p < 0.05). 54% of the cases presenting LSP obtained HR < 5 mm, which indicates sinus lift surgery. The present study showed that tooth loss in posterior maxilla favors sinus pneumatization and the identification of LSP at molar roots seems to indicate a greater necessity for sinus lift surgeries.

Diagnóstico diferencial da sinusite de origem odontológica por meio da tomografia computadorizada / Differential diagnosis of dental sinusitis with the aid of computed tomography

O objetivo do presente artigo é apresentar três casos clínicos com diagnóstico de sinusite de origem odontológica, ou síndrome endo-antral, um quadro inflamatório infeccioso de origem endodôntica que acomete dos tecidos e mucosa do seio maxilar adjacentes aos ápices radiculares.Os casos apresentados chamam a atenção para a dificuldade do diagnóstico apenas coma radiografia periapical e a importância da tomografia computadorizada como recurso auxiliar.

The aim of the current article is to report three clinical cases diagnosed as sinusitis of dental origin, or endo-antral syndrome, an inflammatory condition of endodontic infection origin that affects the tissues and mucosa of the adjacent maxillary sinus up to the root apex. The presented cases draw attention to the difficulty of diagnosis only with periapical radiography and the importance of computed tomography as an auxiliary resource.

Cisto radicular inflamatório extenso envolvendo seio maxilar / Large radicular cyst involving the maxillary sinus

O cisto radicular é o cisto odontogênico de maior significado clínico para o cirurgião-dentista. Por ser a lesão cística inflamatória mais frequentemente encontrada dos maxilares, é a mais tratada. Ocorre nos ápices de dentes infectados em decorrência à necrose pulpar. Embora o cisto radicular faça parte do cotidiano do clínico, há poucos trabalhos descrevendo as suas características clínicas e tomográficas. Assim, o objetivo deste trabalho é o de apresentar um cisto radicular extenso com envolvimento do seio maxilar e cavidade nasal cujo exame de tomografia computadorizada por feixe cônico foi essencial para o delineamento do plano de tratamento...

The radicular cyst is the odontogenic lesion with major clinical significance for the dental surgeon. Once this is the most common inflammatory cystic lesion, the radicular cyst is the most treated one. It affects the apical portion of infected teeth after the pulp necrosis. Although the radicular cyst is part of the routine of the dental practice, there are only few studies describing its clinical and thomographic features. Thus, the aim of this work is to report an extensive radicular cyst involving the maxillary sinus and nasal cavity which cone bean computerized tomography was essential for the surgical planning...

Morphometric Analysis of Developing Maxillary Sinuses in Human Foetuses / Análisis Morfométrico del Desarrollo de los Senos Maxilares en Fetos Humanos

El desarrollo de los senos paranasales en humanos y en muchos mamíferos ha permanecido como un enigma hace ya varios milenios. Análisis morfométricos de los senos maxilares en fetos humanos no han sido suficientemente documentados y en la India son inexistentes. El presente estudio fue llevado a cabo para determinar los diferentes diámetros, el padrón de crecimiento, el dimorfismo sexual y las variaciones bilaterales en los senos maxilares de 37 fetos humanos de diferentes edades (16-34 semanas de vida intrauterina), los cuales fueron divididos en 5 grupos etarios. Los senos maxilares fueron disecados por la parte nasal del maxilar y los diversos diámetros fueron medidos con la ayuda de un caliper. El crecimiento porcentual del diámetro AP fue +48 por ciento en los fetos de 17-20 semanas (p <0.001), el diámetro vertical fue de +60 por ciento (p <0.001).Los diámetros AP de ambos lados de un feto tuvieron una variación significativa (p <0.005) en menores de 17 semanas. Los diámetros AP fueron invariablemente mayores en fetos masculinos, pero una variación significativa (p <0.001) fue encontrada solamente en individuos de 26 a 36 semanas, mientras que una variación significativa (p <0.02) fue observada en los diámetros transversos en fetos masculinos de 21-25 semanas. Las dimensiones anteroposteriores mostraron un crecimiento más rápido, mientras que otros diámetros fueron en concordancia con la circcunferencia craneal. Se puede concluir que: 1) Diámetros diferentes del seno maxilar tienen una aceleración de crecimiento en diferentes periodos de la vida intrauterina. 2) Valores de los diámetros AP permanecen más altos, desde el inicio al término de la vida intrauterina. 3) Los senos maxilares permanecen relativamente más amplios en fetos masculinos a través de su vida.

The development of the paranasal sinuses, in human race and in many mammals remained as much an enigma as it did nearly two millennia ago. Morphometric analysis of maxillary sinuses in human foetuses are not fully documented and also their morphological studies in Indian population are non-existent. So the present study was conducted to determine the different diameters, the pattern of growth, sexual dimorphism and bilateral variations in maxillary sinuses. 37 human foetuses of different age groups (16 - 34 wks of IUL) were divided into five groups on the basis of age. Maxillary sinuses were dissected out from the nasal aspects of maxillae and their various diameters were measured with the help of Vernier callipers. The percent growth of AP diameter was +48% in 17-20 wks (p <0.001), of vertical diameter was +60% in 17-20 wks (p <0.001) and of transverse diameter was + 47% in 17-20 wks (p <0.001). Out of 3,anteroposterior diameters were maximum throughout foetal life. AP diameters of both sides of a foetus had significant variation (p <0.005) in <17 wks. AP diameters were invariably more in males but significant variation (p <0.001) was found only in 26-36 wks while significant variation (p <0.02) was observed in transverse diameters in males of 21-25 wks. Anteroposterior dimensions showed faster growth while other diameters were in pace with the head circumference. It was concluded that: 1) Different diameters of maxillary sinus have spurt of growth in different periods of IUL. 2) Values of anteroposterior diameter remain higher, right from the beginning to the end of intra-uterine life. 3) Maxillary sinuses remain relatively larger in males throughout life.

Crecimiento y desarrollo del seno maxilar y su relación con las raíces dentarias / Growt and development of the maxillary sinus and its relation with the dental roots

El seno maxilar es el primero en desarrollarse y lo hace en el transcurso del tercer mes de gestación (12ava semana V.I.U.) siguiendo una serie de sucesos morfogenéticos. Su ritmo de crecimiento es muy lento durante la vida fetal. Para algunos autores su crecimiento depende de las piezas dentarias, pero está demostrado que lo hace como consecuencia de la función respiratoria. Los dientes relacionados con el piso del seno varían y pueden ser sólo los tres molares o incluir los premolares y los caninos. La Sinusitis Maxilar se acompaña con frecuencia de dolor dentario. Las infecciones pueden propagarse con facilidad entre el seno frontal o las celdillas etmoidales anteriores, la cavidad nasal, los dientes y el seno maxilar.

The sinus maxillary is the first which starts its development, and it do this during the third month of the gestation (12th week VIU) through a group of morfogenetics events. It’s rhythm growth is too slaw during the fetal life. For some authors the growth of the sinus maxillary depends on the dental pieces, but it’s proved that it’s growth is a consequence of the respiratory function. The teeth which have relation with the floor of sinus can be the premolars, the canines or only the three molars. The maxillary (sinusitis) usually presents tooth ache. The infections are able to propagate easily around the sinus frontalis or the cells etmoidalis carlier, the nasal cavity, the teeth and the sinus maxillary.

Tratamento da deficiência da pré-maxila com o regulador de funçäo aragäo (RFA IV): apresentaçäo de um caso clínico / Tratment of premaxillary deficiency with the Aragao Functional Regulator (RFV IV): case report

O autor apresenta um método de tratamento que proporciona um melho crescimento e desenvolvimento da regiäo da pré-maxila e por conseqüência, do têrço-médio da face