Background/purpose: Previous studies have reported on changes in masticatory ability and patient satisfaction after restoration of missing second molars. However, there has been no evaluation of the masticatory ability and oral health-related quality of life (OHRQoL) of patients who did not replace their second molar. The purpose of the present study was to analyze the effects of the loss of a second molar on masticatory ability and OHRQoL.
Methods: Twenty-two subjects who had lost a second molar (the missing group) and another 22 subjects with complete dentition (the control group) were enrolled. In the evaluation of masticatory ability, an objective test by measurement of the mixing ability index (MAI) with the occlusal contact area and a subjective test by questionnaire on food intake ability (FIA) were used. In the assessment of the OHRQoL and patient satisfaction, the Korean Oral Health Impact Profile (OHIP-14K) questionnaire was employed.
Results: The inter-group comparison revealed the control group to have significantly higher mean scores of MAI, FIA, key FIA and hard FIA. Although insignificant, the control group also had a larger mean occlusal contact area and a lower mean OHIP-14K score.
Conclusion: Within the limitations of this study, a missing second molar could lead to diminished objective and subjective masticatory ability with poorer OHRQoL. In conclusion, replacement with a suitable implant prosthesis should be performed after the loss of a second molar.
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http://dx.doi.org/10.1016/j.jfma.2024.12.012 | DOI Listing |
ACS Appl Mater Interfaces
January 2025
School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, P. R. China.
The elevated glutathione (GSH) level and hypoxia in tumor cells are two key obstacles to realizing the high performance of phototherapy. Herein, the electron-donating rotors are introduced to wings of electron-withdrawing pyrrolopyrrole cyanine (PPCy) to form donor-acceptor-donor structure -aggregates for amplified superoxide radical generation, GSH depletion, and photothermal action for hypoxic cancer phototherapy to tackle this challenge. Three PPCy photosensitizers (PPCy-H, PPCy-Br, and PPCy-TPE) produce hydroxyl radicals (•OH) and superoxide radicals (O) in hypoxia tumors exclusively as well as excellent photothermal performances under light irradiation.
View Article and Find Full Text PDFJ Clin Med
January 2025
Radboudumc 3D Lab, Radboud Institute for Health Sciences, Radboud University Medical Center, P. O. Box 9101, 6500 HB Nijmegen, The Netherlands.
This retrospective longitudinal outcome study comparing orthodontic extraction modalities, including extraction of maxillary first or second molars, aimed to compare the three-dimensional tooth movement of maxillary canines (C), premolars (P1, P2), and molars (M1, M2) in Class II division 1 malocclusion treatment with fixed appliances. A sample of 98 patients (mean age 13.20 ± 1.
View Article and Find Full Text PDFFoods
January 2025
Tea Science Center, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
The major components of tea leaves and their infusions were analyzed for various types of green tea available in Japan in 2022. Almost all the green teas used were from the first crop, known for their high amino acid content. The amino acids theanine and arginine in green tea have been shown to reduce stress.
View Article and Find Full Text PDFPLoS One
January 2025
Department of Morphological Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland.
The study involved a gross anatomical description of the parotid gland, mandibular gland, monostomatic sublingual gland, polystomatic sublingual gland, and zygomatic gland in 12 adult Eurasian wolves (Canis lupus lupus) (wild free-ranging individuals and their zoo counterparts), including their morphometry and microscopic evaluation using hematoxylin & eosin, mucicarmine, azan trichrome, PAS, AB pH 1.0, AB pH 2.5; AB pH 2.
View Article and Find Full Text PDFCureus
December 2024
Pediatric and Preventive Dentistry, Dr. Hedgewar Smruti Rugna Sewa Mandal's Dental College and Hospital, Hingoli, IND.
Tooth impaction and eruption failure present common challenges in pediatric dentistry. We report a case of a 10-year-old boy of Indian origin presenting with a missing left mandibular primary second molar and impacted first permanent molar. Radiographic examination revealed an ankylosed primary molar obstructing the path of an unerupted premolar.
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