Maximum and with Correlation Its Endtulous Arch for Denture Size

Keywords: Maximum Mouth Opening (MMO),Edentulous Arch,Alveolar Ridge Dimensions, Complete Dentures, Oral Morphometry, Prosthodontics

European Journal of Prosthodontics and Restorative Dentistry (2026) 34 (2), 173–177

Maximum Mouth Opening

and Its Correlation with
Salah Khalaf BDS, MSc, PhD
University Name: University of Anbar, Faculty of
Dentistry, Prosthodontics Unit.
Endtulous Arch for Denture
Email ID: den.salah.a@uoambar.edu.iq
Size
Abdul-Hadi NF BDS, MSc.
ORCID ID: https://orcid.org/0000-0002-2487-0073

University Name: University of Anbar, Faculty of
Dentistry, Prosthodontics Unit.
Email ID: noor.falah.@uoanbar.edu.iq
ORCID ID: https://orcid.org/0000-0002-6839-2907

Maha Mishaal Turki BDS, MSc.
University Name: University of Anbar, Faculty
of
Dentistry, Prosthodontics Unit.
Email ID: maha-mishaal@uoanbar.edu.iq
ORCID ID: https://orcid.org/0000-0002-5291-2664

Address for correspondence: Dr. Salah Khalaf
Abbas,
Prosthodontics Units, Faculty of Dentistry,
University of Anbar, Iraq
E-mail: dr.salah_alrawi@yahoo.com;
Email ID: den.salah.a@uoambar.edu.iq

Aim: This study aimed to determine the number of edentulous residual ridges in stone casts of individuals with full dentures and to analyze the relationship between these ridges and mouth openness. Methods: The sample consisted of eighty study casts, forty of which were upper and forty of which were lower. Measurements were taken with the assistance of a dry-point compass and a transparent ruler. The measurements for maximum mouth opening (MMO) were collected from volunteers who were instructed to open their mouths to their furthest extent until there was no more room to open. Utilizing a Boley gauge, the distance measured from the edge of the upper lip to the edge of the lower lip was determined. Results: Correlations between mouth opening and arch size (length and width) were verified using Spearman correlation and simple linear regression. Individuals with larger maxillary and mandibular alveolar ridges had wider mouth openings. Conclusion: A significant correlation was found between arch size (length and width) and mouth opening. Keywords: Alveolar ridge dimensions; Complete dentures; Edentulous residual ridge; Maximum mouth opening; Oral morphometry; Prosthodontics.

Received: 11.03.2026 Revised: 25.03.2026 Accepted:02.04.2026

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