XMLinkActa Medica Okayama2005-78061642024A novel brief questionnaire using a face rating scale to assess dental anxiety and fear244254ENTakuyaMinoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry, and Pharmaceutical SciencesAyaKimura-OnoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry, and Pharmaceutical SciencesHikaruArakawaDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry, and Pharmaceutical SciencesKanaTokumotoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry, and Pharmaceutical SciencesYokoKurosakiDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry, and Pharmaceutical SciencesYoshizoMatsukaDepartment of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima UniversityKenjiMaekawaDepartment of Removable Prosthodontics and Occlusion, Osaka Dental UniversityTakuoKubokiDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry, and Pharmaceutical SciencesPURPOSE This study aimed to evaluate the reliability and validity of a four-item questionnaire using a face rating scale to measure dental trait anxiety (DTA), dental trait fear (DTF), dental state anxiety (DSA), and dental state fear (DSF).<br>
MATERIALS AND METHODS Participants were consecutively selected from patients undergoing scaling (S-group; n = 47) and implant placement (I-group; n = 25). The S-group completed the questionnaire both before initial and second scaling, whereas the I-group responded on the pre-surgery day (Pre-day), the day of implant placement (Imp-day), and the day of suture removal (Post-day).<br>
RESULTS The reliability in the S-group was evaluated using the test-retest method, showing a weighted kappa value of DTA, 0.61; DTF, 0.46; DSA, 0.67; DSF, 0.52. Criterion-related validity, assessed using the State-Trait Anxiety Inventory’s trait anxiety and state anxiety, revealed positive correlations between trait anxiety and DTA/DTF (DTA, ρ = 0.30; DTF, ρ = 0.27, ρ: correlation coefficient) and between state anxiety and all four items (DTA, ρ = 0.41; DTF, ρ = 0.32; DSA, ρ = 0.25; DSF, ρ = 0.25). Known-group validity was assessed using the initial data and Imp-day data from the S-group and I-group, respectively, revealing significantly higher DSA and DSF scores in the I-group than in the S-group. Responsiveness was gauged using I-group data, showing significantly lower DSA and DSF scores on post-day compared to other days.<br>
CONCLUSION The newly developed questionnaire has acceptable reliability and validity for clinical use, suggesting its usefulness for research on dental anxiety and fear and for providing patient-specific dental care.No potential conflict of interest relevant to this article was reported.Japan Prosthodontic SocietyActa Medica Okayama1883-19586812023Tooth morphology fusion technique is more accurate than conventional technique in transferring morphology of provisional to definitive screw-retained, implant-supported crown: A preliminary intervention study139146ENTakuyaMinoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry and Pharmaceutical SciencesYokoKurosakiDepartment of Oral Rehabilitation and Implantology, Okayama University HospitalKanaTokumotoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry and Pharmaceutical SciencesKojiIzumiSHIKEN CorporationHiroshiMitsumuneSHIKEN CorporationKenjiMaekawaDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry and Pharmaceutical SciencesAkihiroUedaDental Technician Laboratory, Okayama University HospitalTomohitoNakanoDental Technician Laboratory, Okayama University HospitalJunichiSejimaDental Technician Laboratory, Okayama University HospitalAyaKimura-OnoDepartment of Oral Rehabilitation and Implantology, Okayama University HospitalTakuoKubokiDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Faculty of Medicine, Dentistry and Pharmaceutical SciencesPurpose: To compare the accuracy of the tooth morphology fusion (TMF) digital technique and customized impression transfer coping (conventional) technique when transferring the morphology of a provisional crown to a definitive screw-retained implant-supported crown.<br>
Methods: Six cases of partial edentulism (one anterior and five posterior) treated with oral implant placement in our clinic for the loss of three or fewer teeth in the maxilla or mandible between April 2017 and September 2018 were included. After implant placement and re-entry surgery, provisional restorations were made and adjusted to obtain the ideal morphology. Two definitive restorations were constructed by transferring the complete morphology of the provisional restorations, including the subgingival contour, using the TMF digital and conventional techniques. Three sets of surface morphological data were obtained using a desktop scanner. The three-dimensional total discrepancy volume (TDV) between the provisional restoration (reference) and the two definitive restorations was digitally measured by overlapping the surface data of the stone cast using the Boolean operation. Each TDV ratio (%) was calculated by dividing the TDV by the volume of provisional restoration. The median TDV ratios for TMF and conventional techniques were compared using the Wilcoxon signed-rank test.<br>
Results: The median TDV ratio between provisional and definitive restorations constructed using the TMF digital technique (8.05%) was significantly lower than that obtained using the conventional technique (13.56%, P < 0.05).<br>
Conclusions: In this preliminary intervention study, the TMF digital technique was more accurate than the conventional technique for the transfer of morphology from provisional to definitive prosthesis.No potential conflict of interest relevant to this article was reported.SpringerActa Medica Okayama2198-40341012024Long-term follow-up of a patient with Parkinson's disease under nursing care after replacement of fixed implant-supported prostheses with an implant overdenture: a case report37ENKanaTokumotoDepartment of Oral and Maxillofacial Surgery, School of Medicine, Hyogo Medical UniversityTakuyaMinoOkayama University Dental SchoolIkueTosaOkayama University Dental SchoolKoOmoriDepartment of Oral Rehabilitation and Regenerative Medicine, Dentistry and Pharmaceutical Sciences, Okayama University Graduate School of MedicineMichiyoYamamotoDental Clinic, AINOSATO ClinicKazukiTakaokaDepartment of Oral and Maxillofacial Surgery, Shiga University of Medical ScienceKenjiMaekawaDepartment of Removable Prosthodontics and Occlusion, Osaka Dental UniversityTakuoKubokiOkayama University Dental SchoolHiromitsuKishimotoDepartment of Oral and Maxillofacial Surgery, School of Medicine, Hyogo Medical UniversityBackground In older patients with progressive neurodegeneration, replacing fixed implant-supported prostheses (FIP) with implant overdentures (IOD) has been proposed to prevent future mucosal injury and create an oral environment that is easier for caregivers to clean. However, there have been no reports on the progress after replacing FIP with IOD. In this report, we present the progress of an older patient with Parkinson’s disease in whom FIP was replaced with IOD.<br>
Case presentation An 81-year-old male patient with Parkinson’s disease presented to our outpatient clinic with bruxism and crossbites. FIPs, with five Brånemark system implants, were placed in the bilateral lower molars. The FIP was replaced with an IOD with two locator attachments to create an oral environment that was easier for caregivers to clean and allow easy recovery of masticatory function if residual teeth were fractured in the care environment. As his systemic condition deteriorated, treatment was changed from outpatient to in-home visits. During dental care visits, professional oral cleaning and denture repair were continued, and good nutritional status was maintained. However, the patient developed cholecystitis and was hospitalized. During hospitalization, gastrostomy was performed because he developed aspiration pneumonia. After discharge from the hospital, the patient remained in bed all day and could not wear an IOD, resulting in buccal mucosa ulceration due to abrasion of the locator abutment. We decided to replace the abutment with cover screws; however, not all the implants could sleep submucosally. Although regular oral cleaning was resumed, new ulcers developed even when cover screws were installed. Additionally, swelling and drainage were observed at the peri-implant mucosal site where peri-implantitis had once occurred during an outpatient visit. The patient was readmitted to the hospital for a urinary tract infection, and subsequent visits were abandoned.<br>
Conclusions By replacing FIP with IOD in an older patient with Parkinson’s disease, we addressed a barrier to caregiver-provided oral management. The removable prosthesis facilitated smooth oral care by caregivers and functional recovery in the event of trouble with residual teeth. However, it could not completely avoid the recurrence of buccal mucosal ulcers or peri-implantitis.No potential conflict of interest relevant to this article was reported.SpringerActa Medica Okayama2198-4034912023Accuracy of a novel modified single computed tomography scanning method for assisting dental implant placement: a retrospective observational study42ENHiroakiShimizuDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakuyaMinoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesYokoKurosakiDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHikaruArakawaDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKanaTokumotoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesAyaKimura-OnoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKenjiMaekawaDepartment of Remov‑ able Prosthodontics and Occlusion, Osaka Dental UniversityTakuoKubokiDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesPurpose The aim of this study is to compare dental implant placement accuracy of three surgical guide fabrication methods: single (SCT) and double computed tomography (DCT), and a newly developed modified SCT (MSCT) scan method.<br>
Methods A total of 183 cases (183 surgical guides, and 485 implants) of static-guide-assisted implant placement surgery using the SCT, DCT, or MSCT methods in a dental clinic were included in the study. Three-dimensional (3D) deviations (mm) at the entry and tip of the implant body between preoperative simulation and actual placement were measured as surrogate endpoints of implant placement accuracy. The following survey details were collected from medical records and CT data: sex, age at implant placement surgery, surgical guide fabrication method, number of remaining teeth, implant length, implant location, alveolar bone quality, and bone surface inclination at implant placement site in preoperative simulation, etc. Risk factors for reducing implant placement accuracy were investigated using generalized estimating equations.<br>
Results The SCT and DCT methods (odds ratios [ORs] vs. MSCT method: 1.438, 1.178, respectively), posterior location (OR: 1.114), bone surface buccolingual inclination (OR: 0.997), and age at implant placement surgery (OR: 0.995) were significant risk factors for larger 3D deviation at the entry; the SCT (OR: 1.361) and DCT methods (OR: 1.418), posterior location (OR: 1.190), implant length (OR: 1.051), and age at implant placement surgery (OR: 0.995) were significant risk factors for larger 3D deviation at the tip of the implant body.<br>
Conclusions Implant placement accuracy was better using the MSCT method compared to the SCT and DCT methods.No potential conflict of interest relevant to this article was reported.Japan Prosthodontic SocietyActa Medica Okayama1883-19586512021Newly developed data-matching methodology for oral implant surgery allowing the automatic deletion of metal artifacts in 3D-CT images using new reference markers: A case report125129ENHiroakiShimizuDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesHikaruArakawaDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakuyaMinoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical SciencesYokoKurosakiDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesKanaTokumotoDepartment of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesTakuoKubokiOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesPatients: The patient was a 55-year-old woman with left upper molar free-end edentulism and 9 full cast metal crowns in her mouth. Three three-dimensional (3D) images were superimposed: a computed tomography (CT) image with the patient wearing the CT-matching template (CTMT) with six glass ceramic markers, which hardly generate any artifacts, on the template surface, and oral plaster model surfaces with and without CTMTs. Metal artifacts were automatically removed by a Boolean operation identifying unrealistic images outside the oral plaster model surface. After the preoperative simulation, fully guided oral implant surgery was performed. Two implant bodies were placed in the left upper edentulism. The placement errors calculated by comparing the preoperative simulation and actual implant placement were then assessed by a software program using the 3D-CT bone morphology as a reference. The 3D deviations between the preoperative simulation and actual placement at the entry of the implant body were a maximum 0.48 mm and minimum 0.26 mm. Those at the tip of the implant body were a maximum 0.56 mm and a minimum 0.25 mm.<br/>
Discussion: In this case, the maximum 3D deviations at the entry and tip section were less than in previous studies using double CT.<br/>
Conclusions: Accurate image fusion utilizing CTMT with new reference markers was possible for a patient with many metal restorations. Using a surgical guide manufactured by the new matching methodology (modified single CT scan method), implant placement deviation can be minimized in patients with many metal restorations. No potential conflict of interest relevant to this article was reported.