Virtual implant planning in the edentulous maxilla: Criteria for decision making of prosthesis design

Marianna Avrampou, Regina Mericske-Stern, Markus B. Blatz, Joannis Katsoulis

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Objectives: To evaluate prosthetic parameters in the edentulous anterior maxilla for decision making between fixed and removable implant prosthesis using virtual planning software. Material and methods: CT- or DVT-scans of 43 patients (mean age 62 ± 8 years) with an edentulous maxilla were analyzed with the NobelGuide™ software. Implants (≥3.5 mm diameter, ≥10 mm length) were virtually placed in the optimal three-dimensional prosthetic position of all maxillary front teeth. Anatomical and prosthetic landmarks, including the cervical crown point (C-Point), the acrylic flange border (F-Point), and the implant-platform buccal-end (I-Point) were defined in each middle section to determine four measuring parameters: (1) acrylic flange height (FLHeight), (2) mucosal coverage (MucCov), (3) crown-Implant distance (CID) and (4) buccal prosthesis profile (ProsthProfile). Based on these parameters, all patients were assigned to one of three classes: (A) MucCov ≤ 0 mm and ProsthProfile≥450 allowing for fixed prosthesis, (B) MucCov = 0-5 mm and/or ProsthProfile = 300-450 probably allowing for fixed prosthesis, and (C) MucCov ≥ 5 mm and/or ProsthProfile ≤ 300 where removable prosthesis is favorable. Statistical analyses included descriptive methods and non-parametric tests. Results: Mean values were for FLHeight 10.0 mm, MucCov 5.6 mm, CID 7.4 mm, and ProsthProfile 39.10. Seventy percent of patients fulfilled class C criteria (removable), 21% class B (probably fixed), and 2% class A (fixed), while in 7% (three patients) bone volume was insufficient for implant planning. Conclusions: The proposed classification and virtual planning procedure simplify the decision-making process regarding type of prosthesis and increase predictability of esthetic treatment outcomes. It was demonstrated that in the majority of cases, the space between the prosthetic crown and implant platform had to be filled with prosthetic materials.

Original languageEnglish (US)
Pages (from-to)152-159
Number of pages8
JournalClinical Oral Implants Research
Volume24
Issue numberA100
DOIs
StatePublished - Aug 1 2013

Fingerprint

Prosthesis Design
Maxilla
Prostheses and Implants
Decision Making
Crowns
Cheek
Software
Esthetics
Tooth

Keywords

  • Computer-assisted implantology
  • Decision making
  • Edentulous maxilla
  • Three-dimensional
  • Virtual implant planning

ASJC Scopus subject areas

  • Oral Surgery

Cite this

Virtual implant planning in the edentulous maxilla : Criteria for decision making of prosthesis design. / Avrampou, Marianna; Mericske-Stern, Regina; Blatz, Markus B.; Katsoulis, Joannis.

In: Clinical Oral Implants Research, Vol. 24, No. A100, 01.08.2013, p. 152-159.

Research output: Contribution to journalArticle

Avrampou, Marianna ; Mericske-Stern, Regina ; Blatz, Markus B. ; Katsoulis, Joannis. / Virtual implant planning in the edentulous maxilla : Criteria for decision making of prosthesis design. In: Clinical Oral Implants Research. 2013 ; Vol. 24, No. A100. pp. 152-159.
@article{c7398ac402cc4735928d7e3ff9314ab9,
title = "Virtual implant planning in the edentulous maxilla: Criteria for decision making of prosthesis design",
abstract = "Objectives: To evaluate prosthetic parameters in the edentulous anterior maxilla for decision making between fixed and removable implant prosthesis using virtual planning software. Material and methods: CT- or DVT-scans of 43 patients (mean age 62 ± 8 years) with an edentulous maxilla were analyzed with the NobelGuide™ software. Implants (≥3.5 mm diameter, ≥10 mm length) were virtually placed in the optimal three-dimensional prosthetic position of all maxillary front teeth. Anatomical and prosthetic landmarks, including the cervical crown point (C-Point), the acrylic flange border (F-Point), and the implant-platform buccal-end (I-Point) were defined in each middle section to determine four measuring parameters: (1) acrylic flange height (FLHeight), (2) mucosal coverage (MucCov), (3) crown-Implant distance (CID) and (4) buccal prosthesis profile (ProsthProfile). Based on these parameters, all patients were assigned to one of three classes: (A) MucCov ≤ 0 mm and ProsthProfile≥450 allowing for fixed prosthesis, (B) MucCov = 0-5 mm and/or ProsthProfile = 300-450 probably allowing for fixed prosthesis, and (C) MucCov ≥ 5 mm and/or ProsthProfile ≤ 300 where removable prosthesis is favorable. Statistical analyses included descriptive methods and non-parametric tests. Results: Mean values were for FLHeight 10.0 mm, MucCov 5.6 mm, CID 7.4 mm, and ProsthProfile 39.10. Seventy percent of patients fulfilled class C criteria (removable), 21{\%} class B (probably fixed), and 2{\%} class A (fixed), while in 7{\%} (three patients) bone volume was insufficient for implant planning. Conclusions: The proposed classification and virtual planning procedure simplify the decision-making process regarding type of prosthesis and increase predictability of esthetic treatment outcomes. It was demonstrated that in the majority of cases, the space between the prosthetic crown and implant platform had to be filled with prosthetic materials.",
keywords = "Computer-assisted implantology, Decision making, Edentulous maxilla, Three-dimensional, Virtual implant planning",
author = "Marianna Avrampou and Regina Mericske-Stern and Blatz, {Markus B.} and Joannis Katsoulis",
year = "2013",
month = "8",
day = "1",
doi = "10.1111/j.1600-0501.2011.02407.x",
language = "English (US)",
volume = "24",
pages = "152--159",
journal = "Clinical Oral Implants Research",
issn = "0905-7161",
publisher = "Blackwell Munksgaard",
number = "A100",

}

TY - JOUR

T1 - Virtual implant planning in the edentulous maxilla

T2 - Criteria for decision making of prosthesis design

AU - Avrampou, Marianna

AU - Mericske-Stern, Regina

AU - Blatz, Markus B.

AU - Katsoulis, Joannis

PY - 2013/8/1

Y1 - 2013/8/1

N2 - Objectives: To evaluate prosthetic parameters in the edentulous anterior maxilla for decision making between fixed and removable implant prosthesis using virtual planning software. Material and methods: CT- or DVT-scans of 43 patients (mean age 62 ± 8 years) with an edentulous maxilla were analyzed with the NobelGuide™ software. Implants (≥3.5 mm diameter, ≥10 mm length) were virtually placed in the optimal three-dimensional prosthetic position of all maxillary front teeth. Anatomical and prosthetic landmarks, including the cervical crown point (C-Point), the acrylic flange border (F-Point), and the implant-platform buccal-end (I-Point) were defined in each middle section to determine four measuring parameters: (1) acrylic flange height (FLHeight), (2) mucosal coverage (MucCov), (3) crown-Implant distance (CID) and (4) buccal prosthesis profile (ProsthProfile). Based on these parameters, all patients were assigned to one of three classes: (A) MucCov ≤ 0 mm and ProsthProfile≥450 allowing for fixed prosthesis, (B) MucCov = 0-5 mm and/or ProsthProfile = 300-450 probably allowing for fixed prosthesis, and (C) MucCov ≥ 5 mm and/or ProsthProfile ≤ 300 where removable prosthesis is favorable. Statistical analyses included descriptive methods and non-parametric tests. Results: Mean values were for FLHeight 10.0 mm, MucCov 5.6 mm, CID 7.4 mm, and ProsthProfile 39.10. Seventy percent of patients fulfilled class C criteria (removable), 21% class B (probably fixed), and 2% class A (fixed), while in 7% (three patients) bone volume was insufficient for implant planning. Conclusions: The proposed classification and virtual planning procedure simplify the decision-making process regarding type of prosthesis and increase predictability of esthetic treatment outcomes. It was demonstrated that in the majority of cases, the space between the prosthetic crown and implant platform had to be filled with prosthetic materials.

AB - Objectives: To evaluate prosthetic parameters in the edentulous anterior maxilla for decision making between fixed and removable implant prosthesis using virtual planning software. Material and methods: CT- or DVT-scans of 43 patients (mean age 62 ± 8 years) with an edentulous maxilla were analyzed with the NobelGuide™ software. Implants (≥3.5 mm diameter, ≥10 mm length) were virtually placed in the optimal three-dimensional prosthetic position of all maxillary front teeth. Anatomical and prosthetic landmarks, including the cervical crown point (C-Point), the acrylic flange border (F-Point), and the implant-platform buccal-end (I-Point) were defined in each middle section to determine four measuring parameters: (1) acrylic flange height (FLHeight), (2) mucosal coverage (MucCov), (3) crown-Implant distance (CID) and (4) buccal prosthesis profile (ProsthProfile). Based on these parameters, all patients were assigned to one of three classes: (A) MucCov ≤ 0 mm and ProsthProfile≥450 allowing for fixed prosthesis, (B) MucCov = 0-5 mm and/or ProsthProfile = 300-450 probably allowing for fixed prosthesis, and (C) MucCov ≥ 5 mm and/or ProsthProfile ≤ 300 where removable prosthesis is favorable. Statistical analyses included descriptive methods and non-parametric tests. Results: Mean values were for FLHeight 10.0 mm, MucCov 5.6 mm, CID 7.4 mm, and ProsthProfile 39.10. Seventy percent of patients fulfilled class C criteria (removable), 21% class B (probably fixed), and 2% class A (fixed), while in 7% (three patients) bone volume was insufficient for implant planning. Conclusions: The proposed classification and virtual planning procedure simplify the decision-making process regarding type of prosthesis and increase predictability of esthetic treatment outcomes. It was demonstrated that in the majority of cases, the space between the prosthetic crown and implant platform had to be filled with prosthetic materials.

KW - Computer-assisted implantology

KW - Decision making

KW - Edentulous maxilla

KW - Three-dimensional

KW - Virtual implant planning

UR - http://www.scopus.com/inward/record.url?scp=84880702970&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880702970&partnerID=8YFLogxK

U2 - 10.1111/j.1600-0501.2011.02407.x

DO - 10.1111/j.1600-0501.2011.02407.x

M3 - Article

C2 - 22324427

AN - SCOPUS:84880702970

VL - 24

SP - 152

EP - 159

JO - Clinical Oral Implants Research

JF - Clinical Oral Implants Research

SN - 0905-7161

IS - A100

ER -