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Table 4 Prosthetic complications

From: Current status of implant prosthetics in Japan: a survey among certified dental lab technicians

Question   Values
Q9. What are the main issues generally encountered? Compatibility precision issues 29.6%
Aesthetic issues 33.2%
Occlusal issues 37.2%
Q10. What are the main fabrication challenges faced? Poor implant location and orientation 42.4%
Inadequate consideration of occlusion 17.0%
Defects and inaccuracies in impression and bite registration 29.0%
Defective or unreasonable prosthesis design 10.6%
Other 1.0%
Q11. What are the frequently received repair requests involving implant fixed prostheses? Facing damage and chipping 54.5%
Facing discoloration and wear (indirect composite veneer crowns) 17.0%
Bridge connector fracture 10.0%
Design changes and modification associated with additional implants 13.9%
Other 4.6%
Q12. What kind of creative steps do you take in order to prevent veneer fracture and chipping in the molar region? Use of metal occlusal designs 15.1%
Use of indirect composite resin material 15.7%
Devise metal coping designs 36.3%
Cover the distal-most part with metal 24.0%
Nothing in particular 8.9%
Q13. What are the frequently received repair requests for IODs? Fracturing of the denture base or denture tooth detachment/fracture 53.8%
Mesostructure (attachment) damage 8.4%
Occlusal reconstruction due to denture wear or attrition 24.1%
Replacement of the attachment system (transition to another system) 8.1%
Other 5.6%
Q14. Do you have any requests for dentists who practice implant treatment? To consult technicians or allow technicians to participate from the treatment planning stage 28.3%
To use suitable implant location and orientation 31.8%
To improve treatment and condition of soft tissue 21.8%
To study more about prostheses and occlusion 14.5%
Other 3.6%