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Volume 42 , Issue 5
September/October 2022

Pages 683689


Single-Unit Short Implants in the Molar Region: A Retrospective Study with a Minimum 3-Year Follow-up

Eduardo Anitua, MD, DDS, PhD/Javier Flores, DDS/Sofia Fernandez de Retana, PhD/Mohammad Hamdan Alkhraisat, DDS, MSc, PhD, Eu PhD


DOI: 10.11607/prd.5005

The high biomechanical loads in molar region wounds challenge the indication for short implants to be used as a single-unit implant. This study reports on the outcomes of single-unit short implants (≤ 8.0 mm) in the maxillary and mandibular molar regions. Forty-nine short implants were placed in 48 patients to replace a missing molar tooth. Two-piece restorations with screw retention were fabricated. During the follow-up, implant survival and marginal bone loss (MBL) were assessed. The known implant length was used as a reference to calibrate the linear measurements on digital periapical radiographs, and descriptive statistical analysis was performed. The implants were followed over a period of 47 12 months. No implant failure was recorded, and no prosthesis failure was observed. The average MBL was 0.15 0.5 mm. The mean crown height space was 13 3 mm. The overall crown-to-implant ratio was 1.7 0.4. Two technical complications occurred due to the loosening of the unit abutment. After screw re-tightening, no more screw loosening was observed. This study supports the use of short implants as a single-unit implant in the maxillary and mandibular molar regions.


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