Study on Suitability of Grafted Bone Following Mandibular Reconstruction Evaluated According to Masticatory Performance Scores Using Half-Portion Gummy Jelly

Abstract

When performing mandibular reconstruction following mandibular segmentectomy, the surgical method that we have been using involves creating a surgical guide plate using a three dimensions model for bending the mandible reconstruction plate. It has been reported that the current method results in an excellent suitability of the graft into the mandible, which allows for a highly esthetic recovery. The purpose of the present study was to evaluate how well the current surgical method enables the grafted bone to suitability within the mandibular defect in terms of esthetics and functionality by measuring masticatory performance using a gummy score method. We enrolled 11 patients who had undergone mandibular reconstruction using the current method following mandibular tumorectomy at Osaka Medical College Hospital. Among them, 6 evaluable patients were examined using the gummy score method and occlusal force measurement two months after the operation. Gummy score evaluations were performed while masticating on a whole and then a half-portion gummy jelly, taking into account the decline in occlusal force. The results revealed a declining tendency in masticatory performance and occlusal force; however, adequate masticatory performance was obtained with the half-portion gummy jelly. We believe that the gummy score method using a test gummy jelly is a useful tool in evaluating whether a functionally good suitability between the grafted bone and the mandible has been achieved after mandibular reconstruction using the current method.

Mechanical, Histological, and Scanning Electron Microscopy Study of the Effect of Mixed-Acid and Heat Treatment on Additive-Manufactured Titanium Plates on Bonding to the Bone Surface

“…Therefore, artificial bone with shape-recovery capacity and high compatibility with the living body has long been needed to solve these problems, and customized artificial bone, in which hard tissues are artificially created based on computed tomography (CT) scans of a patient, has been in development [ 4 , 5 , 6 ]. In particular, titanium (Ti), which has high biocompatibility, has been used in many implantable medical devices in clinical settings, including artificial joints and dental implants, and its high efficacy and safety have been demonstrated [ 7 , 8 , 9 , 10 , 11 , 12 ]. Of the customizable technologies, additive manufacturing (AM) using the selective laser technique, which creates artificial bone with Ti particles based on CT scans of a patient, has attracted attention [ 13 , 14 , 15 ].…”

The Relationship between Jaw Function and Cognitive Function in the Elderly Population

“…To obtain gummy jelly scores, each subject chewed one test gummy jelly (UHA Mikakuto Co., Ltd., Osaka, Japan) as the chewing sample 30 times, and then spit the comminuted pieces into a gauze cloth. The pieces were transferred to a transparent petri dish and used as samples for visual inspection; two evaluators visually compared the size of the pieces in the same sample on a scale of 1 to 10 in order to obtain the gummy score If the scores of the two evaluators differed, the higher score was used 4,5) . • Tongue pressure: Tongue pressure was measured using a tongue Correspondence to: Dr. Kei Suzuki, Department of Oral Surgery, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki City, Osaka, 569-8686, Japan; Tel: +81-72-683-1221; Fax: +81-72-684-6833; E-mail: ora096@osaka-med.…”

The effect of simple heat treatment on apatite formation on grit‐blasted/acid‐etched dental Ti implants already in clinical use

“…This might be because of their poor mineralization capacity, 9,10 although the fixation between the bone and implant and recovery of occlusal force are also affected by the implant placement site and the size of bone defect. 11,12 Kokubo et al 13 reported that a simple heat treatment at 600 C following a H 2 SO 4 /HCl mixed acid treatment provided Ti with high apatite formation in a simulated body fluid (SBF) 14 that was ion-concentrated so as to be nearly equal to human blood plasma. The treated Ti tightly bonded to living bone when it was implanted into a rabbit tibia.…”