Why paranasal sinuses?

Blaney, Sean

doi:10.1017/s0022215100113635

Cited by 54 publications

(64 citation statements)

References 16 publications

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“…Considering the various theories about the function of the paranasal sinuses which are summarized by Blanton and Biggs (1969) and recently discussed by Blaney (1986;1990), the results of the present study, first of all, support a structural role of the maxillary sinus associated with the architecture of the skull. However, the skull is a complex structure and involved in numerous biological roles such as brain protection, food gathering or maintenance of respiratory flow (Russel and Thomason, 1993).…”

Section: Discussionsupporting

confidence: 81%

Growth Pattern of the Maxillary Sinus in Orang-Utan Based on Measurements of CT Scans

Koppe

Röhrer-Ertl²,

Hahn

et al. 1995

Okajimas Folia Anatomica Japonica

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Summary: The postnatal growth of the maxillary sinus was analyzed in 20 male and 20 female skulls of orang-utan (Pongo satyrus borneensis) in 5 age steps. Coronal CT scans were carried out of all skulls using a computed tomograph Siemens SOMATOM DR. The distances between the CT scans were always 4 mm. The outline of the maxillary sinus was surrounded on the CT scans with a planimeter and then the volumes were calculated. Using a growth model introduced by Fanghariel (1974), growth functions for the volume measurements for male anf female animals were calculated separately. The growth curves showed a particular course, which was characterized by a quick rise until the age of 15 years. After the age of 20 years the curves for females orang-utan became gradually flat. At the age of 21 to 23 years the confidence intervals of the growth curves for male and female orang-utan began to drift apart, indicating the appearance of a sexual dimorphism. Using the basicranial length as an indicator of skull size, it becomes evident, that the sexual difference in the maxillary sinus' volume is probably based on the fact, that the maxillary sinus' volume of the male orang-utan increases further on following a common growth pattern.

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Section: Discussionsupporting

confidence: 81%

Growth Pattern of the Maxillary Sinus in Orang-Utan Based on Measurements of CT Scans

Koppe

Röhrer-Ertl²,

Hahn

et al. 1995

Okajimas Folia Anatomica Japonica

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“…Whereas these pillars are thought of as a means to transfer forces generated by the jaw muscles through the cranium, the spaces in between these pillars are from a biomechanical viewpoint regions that are considerably less loaded [DuBrul, 1980]. Thus, it is not surprising that the paranasal sinuses are widely seen as spaces which develop to replace areas of less loaded bone [Blaney, 1990]. A review of MS pneumatization in catarrhine primates, however, does not support this assumption [Koppe and Nagai, 1998].…”

Section: Implication Of Craniofacial Growth On Skull Pneumatization Imentioning

confidence: 99%

“…Its function or biological significance, however, is still uncertain. Out of the many theories for the functions of the paranasal sinuses [Blanton and Biggs, 1969;Blaney, 1990], consensus seems to regard the sinuses as spaces that develop to replace a functionless bone [Witmer, 1997].…”

Section: Introductionmentioning

confidence: 99%

Growth Pattern of the Maxillary Sinus in the Miniature Pig <i>(Sus scrofa)</i>

Koppe¹,

Klauke²,

Lee³

et al. 2000

Cells Tissues Organs

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The biological role of the paranasal sinuses is obscure, can be elucidated through a cross-sectional growth study of the maxillary sinus in miniature pigs. The maxillary sinus area was obtained from lateral cephalograms of left skull halves of 103 female miniature pigs of known ages, from newborn to 24 months. Out of several nonlinear models, the growth of the maxillary sinus was best described with the Gompertz model. The first derivative of the Gompertz curve revealed an increase in the growth rates of the maxillary sinus until 4 months, after which sinus growth slowed down. The eruption of the permanent molars did not seem to have a significant influence on this growth pattern. Furthermore, growth in maxillary sinus size in the miniature pig does not follow growth in skull size closely, which showed the highest growth rates in newborn animals. In addition, a correlation analysis revealed that the relationship between maxillary sinus area and different characteristics of the masticatory apparatus (including linear cranial dimensions, and the dry weight of the masseter and zygomatico-mandibularis muscles) were influenced greatly by skull size. These results suggest that the existence of pneumatic cavities within the mammalian skull is not satisfactorily explained solely by an architectural theory. Epigenetic factors are likely to influence the final shape of the maxillary sinus.

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“…In particular, the current debate about whether the paranasal sinuses have a structural or a functional role (or both ) has not yet been resolved [1,2]. Although this situation is unsatisfactory per se, it is interesting that uncertainty about the functions of the sinus spaces has not deterred researchers from using the paranasal sinuses as a trait in phylogenetic analyses of primates [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

A Longitudinal Study of the Growth Pattern of the Maxillary Sinus in the Pig-Tailed Macaque (Macaca nemestrina)

Koppe

Swindler²,

Lee³

2000

IJFP

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The ontogeny of sexual dimorphism in maxillary sinus size in a nonhuman primate was studied longitudinally for a period of 8 years in 25 female and 25 male Macaca nemestrina via lateral cephalograms. The maxillary sinus was traced and its area digitized. The growth of female maxillary sinuses was described with a Gompertz model; the best fit to the male data was obtained by the logistic model. Growth curves and confidence intervals revealed that the sinuses grew in a similar fashion for 3–4 years in both sexes. After this, female sinuses achieved a plateau in their development while male sinuses continued to grow. Confidence intervals suggested that size dimorphism appeared at the age of 6.3 years. Lowess regression indicated growth spurts in both sexes. Females experienced an earlier and smaller spurt than males. Sexual dimorphism in maxillary sinus size seems to represent a combination of differences in velocity and length of growth. This study indicates that growth of the maxillary sinus follows closely the growth in body size. Nevertheless, due to the variation in sinus size in Macaca, it is questionable if body size is the main determinant of maxillary sinus size. It is suggested that Macaca, with its wide geographic range and different environments, is an especially appropriate genus to use to test hypotheses about the evolution of skull pneumatization in primates.

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Why paranasal sinuses?

Cited by 54 publications

References 16 publications

Growth Pattern of the Maxillary Sinus in Orang-Utan Based on Measurements of CT Scans

Growth Pattern of the Maxillary Sinus in Orang-Utan Based on Measurements of CT Scans

Growth Pattern of the Maxillary Sinus in the Miniature Pig <i>(Sus scrofa)</i>

A Longitudinal Study of the Growth Pattern of the Maxillary Sinus in the Pig-Tailed Macaque (Macaca nemestrina)

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