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.

Alveolar ridge preservation in the posterior maxilla reduces vertical dimensional change: A randomized controlled clinical trial

“…It was reported that sinus pneumatization was larger following extraction of teeth surrounded by a superiorly curving sinus floor. A recent cross‐sectional study using CBCT demonstrated sinus pneumatization predominantly occurred at extraction sites where the sinus floor was located more apical than the root apex, and hardly occurred at the sites located coronal than the root apex (Cavalcanti et al, ). However, in the present study, no correlation was found between the extent of sinus pneumatization and the anatomy of the sinus floor.…”

Tooth Extraction as a Risk Factor for Maxillary Sinus Pneumatization: A Case-control Study

“…Currently, cone-beam computed tomography (CBCT) is a common diagnostic tool that supports threedimensional (3D) imaging and provides thin, detailed sections to assess the relationship between the maxillary sinus floor and the alveolar bone ridge. Although this method reduces the overlapping of anatomical structures and enables a better assessment, a few studies used CBCT to analyze sinus floor pneumatization in the posterior maxilla [1,2,[7][8][9]. The purpose of this study was to determine the amount of sinus pneumatization after the extraction of maxillary teeth in the premolar and molar regions associated with the maxillary sinus via the evaluation of panoramic views.…”

“…This thin bone may break and dislocate during extraction, potentially causing the sinus to expand toward the socket. Additionally, larger amounts of pneumatization can occur after molar extraction [1,2,4]. These larger defects can be observed in the alveolar bone after molar extraction, and the longer healing period required allows the sinus to pneumatize.…”

Frecuencia, hallazgos y variaciones óseas en radiografías panorámicas de personas con edentulismo total

“…Tales condiciones generan decisiones particulares de tratamiento, pues en un 54 % de los casos se requieren procedimientos quirúrgicos previos a la colocación de implantes o a la confección de prótesis totales. Adicionalmente, se ha observado que la pérdida de dientes en el maxilar superior se asocia con neumatización sinusal y se necesita cirugía de elevación de seno en más de la mitad de los casos (6).…”