Michael Klein1, Dennis Tarnow2, Giordani Santos Silveira3, Lauren Lehrfield4. 1. Medical Director, Keystone Dental Inc./Paltop Advanced Dental Solutions Ltd.; Private Practice, Cedarhurst, New York. 2. Clinical Professor, Department of Periodontology, Director of Implant Education, Columbia University, College of Dental Medicine, New York, New York. 3. PhD Student, Department of Orthodontics, School of Dentistry, Pontifical Catholic University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil. 4. QA and RA Associate, Paltop Advanced Dental Solutions, Ltd.
Abstract
OBJECTIVE: The aim of this clinical study was to retrospectively evaluate changes in bone following final abutment insertion and functional loading and to evaluate bone status relative to implant type, width, and length; placement into healed bone and extraction sockets; immediate provisionalization; abutment type (single-unit, multi-unit, cementable stock abutment, custom abutment, ti-base, UCLA); cementable restoration, screw-retained restoration, splinted restoration, and single-unit restoration. MATERIALS AND METHODS: Fifty consecutive patients with 87 implants were evaluated radiographically following final abutment insertion and functional loading to their latest follow-up radiograph. Follow-up evaluation time from final abutment insertion ranged from 11 months (335 days) to 4 years (1,484 days), with an average of 831 days (2.3 years). Mesial and distal surfaces were examined and graded as bone improved, bone maintained, and bone decreased. A total of 174 surfaces were graded (87 implants). RESULTS: Thirty percent of implant surfaces showed bone improvement following restoration, 62% of implant surfaces showed bone maintenance, and 8% showed bone decrease (range 0.1 mm to 1 mm). CONCLUSIONS: This retrospective study showed an unusual phenomenon of bone improvement following restoration for 30% of implant surfaces. Eight percent of the surfaces showed bone decrease but at a maximum of 1 mm. This places 100% of the followed implants well within established criteria for successful implant bone maintenance. There was no statistical difference among the groups in age, gender, implant diameter, implant length, implant location (maxilla versus mandible, anterior versus posterior), and prosthetic procedures. Additional highly controlled prospective studies are being planned to validate and further the authors' knowledge.
OBJECTIVE: The aim of this clinical study was to retrospectively evaluate changes in bone following final abutment insertion and functional loading and to evaluate bone status relative to implant type, width, and length; placement into healed bone and extraction sockets; immediate provisionalization; abutment type (single-unit, multi-unit, cementable stock abutment, custom abutment, ti-base, UCLA); cementable restoration, screw-retained restoration, splinted restoration, and single-unit restoration. MATERIALS AND METHODS: Fifty consecutive patients with 87 implants were evaluated radiographically following final abutment insertion and functional loading to their latest follow-up radiograph. Follow-up evaluation time from final abutment insertion ranged from 11 months (335 days) to 4 years (1,484 days), with an average of 831 days (2.3 years). Mesial and distal surfaces were examined and graded as bone improved, bone maintained, and bone decreased. A total of 174 surfaces were graded (87 implants). RESULTS: Thirty percent of implant surfaces showed bone improvement following restoration, 62% of implant surfaces showed bone maintenance, and 8% showed bone decrease (range 0.1 mm to 1 mm). CONCLUSIONS: This retrospective study showed an unusual phenomenon of bone improvement following restoration for 30% of implant surfaces. Eight percent of the surfaces showed bone decrease but at a maximum of 1 mm. This places 100% of the followed implants well within established criteria for successful implant bone maintenance. There was no statistical difference among the groups in age, gender, implant diameter, implant length, implant location (maxilla versus mandible, anterior versus posterior), and prosthetic procedures. Additional highly controlled prospective studies are being planned to validate and further the authors' knowledge.
Authors: Franz J Strauss; Marina Siegenthaler; Christoph H F Hämmerle; Irena Sailer; Ronald E Jung; Daniel S Thoma Journal: Clin Oral Implants Res Date: 2022-05-29 Impact factor: 5.021