Congenital nasal pyriform aperture stenosis and single central maxillary incisor

Preoperative evaluation with three-dimensional computed tomography

Jon Kway Huang, Sho Jen Cheng, Cheng Chien Yang, Chun Ho Yun, Shin Lin Shih

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Background and Purpose: Congenital nasal pyriform aperture stenosis (CNPAS) is an uncommon cause of nasal airway obstruction in neonates and infants. It is frequently associated with a single central maxillary incisor (SCMI). The purpose of this study was to assess whether 3-dimensional spiral computed tomography (3D spiral CT) could be used for the diagnosis of CNPAS and for detecting SCMI in CNPAS patients before tooth eruption. Methods: From January 1996 to December 2001, 16 patients (mean age, 2 ± 3 months) with clinically suspected CNPAS and 13 normal control subjects (mean age, 28 ± 32 months) were studied prospectively by 3D spiral CT. On the 3D CT image of each subject, the middle pyriform aperture width (MPAW), upper 1/4 PA width (UPAW), and middle internasal process width (MINPW) were measured. In addition, the ratios of MINPW to MPAW and of MINPW to UPAW were calculated. SCMI was identified as a bigger tooth with singular convexity. Results: SCMI was diagnosed in 11 of the 16 CNPAS patients. In the CNPAS patient group, the mean MINPW (5 ± 1 mm) was significantly shorter than the mean MPAW (9 ± 1 mm) and the mean UPAW (8 ± 1 mm) [P < 0.001]. However, in the normal control group, the mean UPAW (13 ± 2 mm) was significantly shorter thant the mean MPAW (16 ± 3 mm) and the mean MINPW (16 ± 3 mm) [p < 0.01]. In the CNPAS patients, the mean ratios of both MINPW to MPAW (0.5 ± 0.1) and of MINPW to UPAW (0.6 ± 0.1) were significantly lower than the corresponding mean ratios in the normal control subjects (1.0 ± 0.1 and 1.3 ± 0.2, respectively; both p < 0.001). Conclusion: Our results indicate that CNPAS is frequently associated with a SCMI and CNPAS patients have a significant reduction in the MINPW and in the ratios of MINPW to MPAW and of MINPW to UPAW. We conclude that 3D spiral CT can be used for diagnosis of CNPAS and for detecting SCMI in CNPAS patients before tooth eruption.

Original languageEnglish
Pages (from-to)37-40
Number of pages4
JournalJournal of the Formosan Medical Association
Volume103
Issue number1
Publication statusPublished - Jan 1 2004
Externally publishedYes

Fingerprint

Nose
Pathologic Constriction
Tomography
Spiral Computed Tomography
Tooth Eruption
Single upper central incisor
Nasal Obstruction
Tooth
Newborn Infant
Control Groups

Keywords

  • Maxilla
  • Nasal cavity
  • Nasal obstruction
  • Tomography, spiral computed

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Congenital nasal pyriform aperture stenosis and single central maxillary incisor : Preoperative evaluation with three-dimensional computed tomography. / Huang, Jon Kway; Cheng, Sho Jen; Yang, Cheng Chien; Yun, Chun Ho; Shih, Shin Lin.

In: Journal of the Formosan Medical Association, Vol. 103, No. 1, 01.01.2004, p. 37-40.

Research output: Contribution to journalArticle

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abstract = "Background and Purpose: Congenital nasal pyriform aperture stenosis (CNPAS) is an uncommon cause of nasal airway obstruction in neonates and infants. It is frequently associated with a single central maxillary incisor (SCMI). The purpose of this study was to assess whether 3-dimensional spiral computed tomography (3D spiral CT) could be used for the diagnosis of CNPAS and for detecting SCMI in CNPAS patients before tooth eruption. Methods: From January 1996 to December 2001, 16 patients (mean age, 2 ± 3 months) with clinically suspected CNPAS and 13 normal control subjects (mean age, 28 ± 32 months) were studied prospectively by 3D spiral CT. On the 3D CT image of each subject, the middle pyriform aperture width (MPAW), upper 1/4 PA width (UPAW), and middle internasal process width (MINPW) were measured. In addition, the ratios of MINPW to MPAW and of MINPW to UPAW were calculated. SCMI was identified as a bigger tooth with singular convexity. Results: SCMI was diagnosed in 11 of the 16 CNPAS patients. In the CNPAS patient group, the mean MINPW (5 ± 1 mm) was significantly shorter than the mean MPAW (9 ± 1 mm) and the mean UPAW (8 ± 1 mm) [P < 0.001]. However, in the normal control group, the mean UPAW (13 ± 2 mm) was significantly shorter thant the mean MPAW (16 ± 3 mm) and the mean MINPW (16 ± 3 mm) [p < 0.01]. In the CNPAS patients, the mean ratios of both MINPW to MPAW (0.5 ± 0.1) and of MINPW to UPAW (0.6 ± 0.1) were significantly lower than the corresponding mean ratios in the normal control subjects (1.0 ± 0.1 and 1.3 ± 0.2, respectively; both p < 0.001). Conclusion: Our results indicate that CNPAS is frequently associated with a SCMI and CNPAS patients have a significant reduction in the MINPW and in the ratios of MINPW to MPAW and of MINPW to UPAW. We conclude that 3D spiral CT can be used for diagnosis of CNPAS and for detecting SCMI in CNPAS patients before tooth eruption.",
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T1 - Congenital nasal pyriform aperture stenosis and single central maxillary incisor

T2 - Preoperative evaluation with three-dimensional computed tomography

AU - Huang, Jon Kway

AU - Cheng, Sho Jen

AU - Yang, Cheng Chien

AU - Yun, Chun Ho

AU - Shih, Shin Lin

PY - 2004/1/1

Y1 - 2004/1/1

N2 - Background and Purpose: Congenital nasal pyriform aperture stenosis (CNPAS) is an uncommon cause of nasal airway obstruction in neonates and infants. It is frequently associated with a single central maxillary incisor (SCMI). The purpose of this study was to assess whether 3-dimensional spiral computed tomography (3D spiral CT) could be used for the diagnosis of CNPAS and for detecting SCMI in CNPAS patients before tooth eruption. Methods: From January 1996 to December 2001, 16 patients (mean age, 2 ± 3 months) with clinically suspected CNPAS and 13 normal control subjects (mean age, 28 ± 32 months) were studied prospectively by 3D spiral CT. On the 3D CT image of each subject, the middle pyriform aperture width (MPAW), upper 1/4 PA width (UPAW), and middle internasal process width (MINPW) were measured. In addition, the ratios of MINPW to MPAW and of MINPW to UPAW were calculated. SCMI was identified as a bigger tooth with singular convexity. Results: SCMI was diagnosed in 11 of the 16 CNPAS patients. In the CNPAS patient group, the mean MINPW (5 ± 1 mm) was significantly shorter than the mean MPAW (9 ± 1 mm) and the mean UPAW (8 ± 1 mm) [P < 0.001]. However, in the normal control group, the mean UPAW (13 ± 2 mm) was significantly shorter thant the mean MPAW (16 ± 3 mm) and the mean MINPW (16 ± 3 mm) [p < 0.01]. In the CNPAS patients, the mean ratios of both MINPW to MPAW (0.5 ± 0.1) and of MINPW to UPAW (0.6 ± 0.1) were significantly lower than the corresponding mean ratios in the normal control subjects (1.0 ± 0.1 and 1.3 ± 0.2, respectively; both p < 0.001). Conclusion: Our results indicate that CNPAS is frequently associated with a SCMI and CNPAS patients have a significant reduction in the MINPW and in the ratios of MINPW to MPAW and of MINPW to UPAW. We conclude that 3D spiral CT can be used for diagnosis of CNPAS and for detecting SCMI in CNPAS patients before tooth eruption.

AB - Background and Purpose: Congenital nasal pyriform aperture stenosis (CNPAS) is an uncommon cause of nasal airway obstruction in neonates and infants. It is frequently associated with a single central maxillary incisor (SCMI). The purpose of this study was to assess whether 3-dimensional spiral computed tomography (3D spiral CT) could be used for the diagnosis of CNPAS and for detecting SCMI in CNPAS patients before tooth eruption. Methods: From January 1996 to December 2001, 16 patients (mean age, 2 ± 3 months) with clinically suspected CNPAS and 13 normal control subjects (mean age, 28 ± 32 months) were studied prospectively by 3D spiral CT. On the 3D CT image of each subject, the middle pyriform aperture width (MPAW), upper 1/4 PA width (UPAW), and middle internasal process width (MINPW) were measured. In addition, the ratios of MINPW to MPAW and of MINPW to UPAW were calculated. SCMI was identified as a bigger tooth with singular convexity. Results: SCMI was diagnosed in 11 of the 16 CNPAS patients. In the CNPAS patient group, the mean MINPW (5 ± 1 mm) was significantly shorter than the mean MPAW (9 ± 1 mm) and the mean UPAW (8 ± 1 mm) [P < 0.001]. However, in the normal control group, the mean UPAW (13 ± 2 mm) was significantly shorter thant the mean MPAW (16 ± 3 mm) and the mean MINPW (16 ± 3 mm) [p < 0.01]. In the CNPAS patients, the mean ratios of both MINPW to MPAW (0.5 ± 0.1) and of MINPW to UPAW (0.6 ± 0.1) were significantly lower than the corresponding mean ratios in the normal control subjects (1.0 ± 0.1 and 1.3 ± 0.2, respectively; both p < 0.001). Conclusion: Our results indicate that CNPAS is frequently associated with a SCMI and CNPAS patients have a significant reduction in the MINPW and in the ratios of MINPW to MPAW and of MINPW to UPAW. We conclude that 3D spiral CT can be used for diagnosis of CNPAS and for detecting SCMI in CNPAS patients before tooth eruption.

KW - Maxilla

KW - Nasal cavity

KW - Nasal obstruction

KW - Tomography, spiral computed

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EP - 40

JO - Journal of the Formosan Medical Association

JF - Journal of the Formosan Medical Association

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