Maxillary V-4: Four implant treatment for maxillary atrophy with dental implants fixed apically at the vomer-nasal crest, lateral pyriform rim, and zygoma for immediate function. Report on 44 patients followed from 1 to 3 years

The Journal of Prosthetic Dentistry
Ole T JensenDaniel F Galindo

Abstract

The V-4 implant placement technique is important for restoring patients with maxillary atrophy, but little has been documented on the outcomes of these treatments. The purpose of this study was to evaluate the outcome of immediate function after 1 year when implants were placed without vertical bone augmentation in Cawood-Howell Classes IV-VI maxillary atrophy (Class C-D by the "all-on-four" site classification) with the nasal crest, lateral pyriform rim, and sometimes the zygoma for apical implant fixation. Function of implants that had been immediately loaded were studied retrospectively after 1 year in 44 patients from 2 different clinics. For each patient studied, 2 angled implants were placed in the midline in the nasal crest/vomer area, and typically, 2 implants were engaged apically in the lateral pyriform rim bilaterally. All 4 of the implants used were angled toward the midline in a V formation, termed "V-4" implant placement. Insertion torque, anterior-posterior spread, implant diameter, implant length, and posterior cantilever were recorded. Implant survival and bone stability were assessed after 1 year. When the lateral pyriform was highly deficient (Class D), zygomatic implants were used posteriorly. A total of 179...Continue Reading

References

Apr 1, 1991·International Journal of Oral and Maxillofacial Surgery·J I Cawood, R A Howell
Aug 1, 1988·International Journal of Oral and Maxillofacial Surgery·J I Cawood, R A Howell
Apr 16, 2011·Oral and Maxillofacial Surgery Clinics of North America·Stuart GravesOle T Jensen
Nov 25, 2011·Contemporary Clinical Dentistry·Romesh SoniD R Prithviraj
Dec 3, 2011·The Journal of Prosthetic Dentistry·Stephen M Parel, William R Phillips

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Citations

Jul 17, 2016·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Bruno Ramos ChrcanovicAnn Wennerberg
Aug 10, 2020·Computers in Biology and Medicine·Aysa AyaliSevcan Kurtulmus-Yilmaz

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