The restoration of single-implants using computer-assisted design/computer-assisted manufacturing abutments appears to help maintaining a regular papillary filling although the variations of the implant positioning or the restoration/teeth relation.
Aim
The aim of this study was to compare the influence of the abutment height and insertion timing on early marginal bone loss (MBL) in posterior mandibular partial implant‐supported restorations.
Material and methods
The study was planned as a prospective, randomized, controlled parallel group including subjects in need of at least two implants for the restoration of an edentulous posterior mandibular area. The patients were allocated into Groups A (implants immediately connected to 2‐mm height abutments), B (immediately connected 1‐mm height abutments), and C (2‐mm abutments were inserted in a second‐stage surgery). Each subject was placed in a 1‐year follow‐up program, including examination assessment of various soft tissue and bone‐level parameters.
Results
A total of thirty‐three patients, including sixty‐eight implants, were enrolled in this study. One implant was lost on group C after the first month of healing. A mean MBL change of 0.719 ± 0.361, 0.651 ± 0.379, and 0.754 ± 0.672 mm was computed for groups A, B, and C, respectively, with no significant differences found. The early MBL at T1 was an independent predictor variable for the marginal bone alterations that were assessed at T3 (p < 0.001).
Conclusion
The first‐month MBL variation is a predictor factor of the bone alterations that might occur after 1 year of treatment. The early connection of final prosthetic abutments with distinct heights does not seem to reduce the 1‐year MBL rate when compared with traditional treatment protocols.
ObjectivesThe aim of this study was to assess the clinical outcomes achieved with
Computer-Assisted Design/Computer-Assisted Manufacturing implant abutments
in the anterior maxilla.Material and MethodsNineteen patients with a mean age of 41 (range form 26 to 63) years, treated
with 21 single tooth implants and 21 Computer-Assisted
Design/Computer-Assisted Manufacturing (CAD/CAM) abutments in the anterior
maxillary region were included in this study. The patients followed 4
criteria of inclusion: (1) had a single-tooth implant in the anterior
maxilla, (2) had a CAD/CAM abutment, (3) had a contralateral natural tooth,
(4) the implant was restored and in function for at least 6 months up to 2
years. Cases without contact point were excluded. Presence/absence of the
interproximal papilla, inter tooth-implant distance (ITD) and distance from
the base of the contact point to dental crest bone of adjacent tooth (CPB)
were accessed.ResultsForty interproximal spaces were evaluated, with an average mesial CPB of 5.65
(SD 1.65) mm and distal CPB of 4.65 (SD 1.98) mm. An average mesial ITD of
2.49 (SD 0.69) mm and an average distal ITD of 1.89 (SD 0.63) mm were
achieved. Papilla was present in all the interproximal spaces accessed.ConclusionsThe restoration of dental implants using CAD/CAM abutments is a predictable
treatment with improved aesthetic results. These type of abutments seem to
help maintaining a regular papillary filling although the variations of the
implant positioning or the restoration teeth relation.
This paper presents an alternative configuration concept for photovoltaic solar cells, namely a Smart Solar Cluster (SSC), which is a self-reconfigurable cluster of either discrete or integrated cells conveniently connected to photoconductive components. Our basic aim is to assess whether an SSC, based on commercial component specifications, can operate efficiently during the year. The simulation results indicate the most appropriate way to design a system using SSCs. This concept is independent of the materials used for the photocell and for the photoconductor, provided their characteristic curves are known.
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