RT Journal Article
T1 Impact of abutment geometry on early implant marginal bone loss. A double-blind, randomized, 6-month clinical trial
A1 Pérez-Sayáns García, Mario
A1 Castelo Baz, Pablo
A1 Penarrocha-Oltra, David
A1 Seijas Naya, Flavio
A1 Conde Amboage, Mercedes
A1 Somoza Martín, José Manuel
K1 Dental implant
K1 Early marginal bone loss
K1 Prostheses abutment width
K1 Randomized clinical trial
K1 Single tooth
AB Objectives: The objective of this study was to analyze the impact of the abutment width on early marginal bone loss (MBL).Material  and  Methods:  A balanced, randomized, double- blind clinical trial with two parallel experimental arms was conducted without a control group. The arms were “cylindrical” abutment and “concave” abutment. Eighty hexagonal internal connection implants, each with a diameter of 4 × 10 mm, were placed in healed mature bone. The main variable was the peri-implant tissue stability, which was measured as MBL at 8 weeks and 6 months.Results: The final sample consisted of 77 implants that were placed in 25 patients. 38 (49.4%) were placed using the cylindrical abutment, and the other 39 (50.6%) were placed using the concave abutment. The early global MBL of −0.6 ± 0.7 mm in the cy-lindrical abutment group was significantly higher than it was in the concave abutment group, in which the early global MBL was −0.4 ± 0.6 mm (p= .030). The estimated ef-fect size (ES) was negative for the cylindrical abutment (ES =  −1.3730, CI −2.5919 to −0.1327; t- value   =  −2.4893; p=  .0139), therefore implying a loss of mean bone level, and it was positive for the concave abutment (ES =  2.8231; CI: 1.4379 to 4.2083; t- value= 4.0957; p= .0002), therefore implying an increase in the average bone level.Conclusions: The  concave  abutments  presented  significantly  less  early  MBL  at 6 months post- loading than classical cylindrical abutments did
PB Wiley
YR 2022
FD 2022
LK http://hdl.handle.net/10347/33476
UL http://hdl.handle.net/10347/33476
LA eng
NO Pérez-Sayans, M., Castelo-Baz, P., Penarrocha-Oltra, D., Seijas-Naya, F., Conde-Amboage, M., & Somoza-Martín, J. M. (2022). Impact of abutment geometry on early implant marginal bone loss. A double-blind, randomized, 6-month clinical trial. Clinical Oral Implants Research, 33(10), 1038-1048.
NO Ministerio de Ciencia e Innovación, Grant/Award Number: PID2020-116587GB-I00; European Union; Nueva Galimplant and the University of Santiago de Compostela, Grant/Award Number: USC-2019-    CE178
DS Minerva
RD 28 abr 2026