Dental implant treatment for two adjacent missing teeth in the esthetic region: A systematic review and 10‐year results of a prospective comparative pilot study

ObjectivesTo investigate if the fracture load of implant‐supported cantilever fixed dental prostheses (ICFDPs) in the anterior region is affected by the implant type and the aging protocol.Materials and MethodsSixty ICFDPs were prepared using multilayer monolithic zirconia for restoring bone‐level (BL) and tissue‐level (TL) titanium‐zirconium implants. Fracture load was measured at baseline (no aging) or after aging in a chewing simulator loading the implant crown or the cantilever in a 30° angle (n = 10 per group). A two‐way ANOVA was applied (α = 0.05) for the effects of implant type and aging protocol.ResultsImplant type (p < 0.001) and aging (p < 0.001) had a significant effect on fracture load values. Baseline specimens of both BL (665 ± 62 N) and TL (554 ± 23 N) had significantly higher mean fracture load values than those of aged specimens(BL implant crown 545 ± 46 N, BL cantilever 563 ± 45 N, TL implant crown 455 ± 32 N, TL cantilever 476 ± 24 N) (p < 0.001). The loading position during aging did not affect fracture load values for BL (p = 0.980) nor TL (p = 0.749). BL implants failed by cement fracture and abutment deformation, while for TL the transmucosal part of the implant deformed.ConclusionsThe fracture load values of anterior ICFDPs decrease with aging in a chewing simulator. BL implants are preferable over TL implants for anterior ICFDPs as higher fracture load values were achieved, and no implant deformation occurred.

show abstract

The impact of a 1 mm interimplant distance on the interproximal crestal bone height. A case report with a 10-year follow-up and literature review

Schwarz,

Szmukler-Moncler,

Melendez

et al. 2024

Preprint

View full text Add to dashboard Cite

Background Between adjacent dental implants, an interimplant distance (IID) of at least 3 mm has been recommended to avoid resorbing the interproximal crestal bone. The effect of a 2 mm IID on crestal bone loss has been investigated but the literature is scarce when it comes to an IID of 1 mm. There is a need to document such clinical situations when they occur and elucidate if such a narrow IID is deleterious or not to the interproximal crest. The present case deals with an IID of 1 mm in the premolar area where, for the first time, the fate of an interimplant crest is reported after a 10-year follow-up.Case presentation : A 57-year-old patient attended with 2 hopeless maxillary premolars. The mesio-distal space available for implant rehabilitation was too narrow to receive standard diameter implants and keep an inter-implant distance (IID) of 3 mm as recommended by accepted guidelines. A protocol of immediate implant placement and provisionalization involving 2 implants of Ø 3.5 mm was implemented; placement in the extraction sockets resulted in an IID of 1 mm. After 3 months of healing the final prosthesis was delivered; the patient has been followed for 10 years now. Surprisingly, the findings showed that the interimplant crest was maintained 1.40 mm coronal to the shoulder of the neck of the implants. Bone completely filled the space between the prosthetic concave abutments and the interproximal papilla was closing the embrasure. The literature reports only 2 experimental studies involving a 1 mm IID; both showed that this did not lead to the resorption of the interproximal bone.Conclusions Unexpectedly, the present case with an IID of 1 mm did not lead to the resorption of the interproximal bone after 10 years. It is speculated that the reason for that is due to the implants displaying an internal conical connection, the platform-switching feature, concave abutments and subcrestal placement. The fate of the interproximal crest of implants placed with an IID of 1 mm lacks scientific evidence. More studies are warranted to elucidate this question in order to propose the best implant treatment in cases displaying a limited mesio-distal space.

show abstract

Dental implant treatment for two adjacent missing teeth in the esthetic region: A systematic review and 10‐year results of a prospective comparative pilot study

Cited by 3 publications

References 23 publications

Outcomes of implants placed in sites of previously failed implants: a systematic review and meta-analysis

Outcomes of implants placed in sites of previously failed implants: a systematic review and meta-analysis

Implant‐Supported Cantilever Fixed Dental Prosthesis in the Anterior Region: Effect of Implant Type and Aging In Vitro

The impact of a 1 mm interimplant distance on the interproximal crestal bone height. A case report with a 10-year follow-up and literature review

Contact Info

Product

Resources

About