Influence of premature exposure of implants on early crestal bone loss: an experimental study in dogs

Je Hyeon Yoo, Byung Ho Choi, Jingxu Li, Han Sung Kim, Chang Yong Ko, Feng Xuan, Seung Mi Jeong

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Objective: Several studies have reported on spontaneous early exposure of submerged implants, suggesting that exposed implants have greater bone loss than nonexposed implants. The purpose of this study was to compare the effects of implant-abutment connections and partial implant exposure on crestal bone loss around submerged implants. Study design: Bilateral, edentulated, flat alveolar ridges were created in the mandible of 6 mongrel dogs. After 3 months of healing, 2 fixtures were placed on each side of the mandible following a commonly accepted 2-stage surgical protocol. The fixtures on each side were randomly assigned to 1 of 2 procedures. In the first, a cover screw was connected to the fixture, and the incised gingiva was partially removed to expose the cover screw (partially exposed group). In the second, a healing abutment was connected to the fixture so that the coronal portion of the abutment remained exposed to the oral cavity (abutment-connected group). After 8 weeks, micro-computed tomography (micro-CT) at the implantation site was performed to measure the bone height in the peri-implant bone. Data were analyzed by Wilcoxon's signed rank test. Results: The average bone height was greater for the abutment-connected fixture (9.8 ± 0.5 mm) than for the partially exposed fixture (9.3 ± 0.5 mm; P < .05). Conclusion: These results suggest that when implant exposure is detected, the placement of healing abutments may help limit bone loss around the submerged implants.

Original languageEnglish
Pages (from-to)702-706
Number of pages5
JournalOral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology
Volume105
Issue number6
DOIs
Publication statusPublished - 2008 Jun 1

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Dogs
Bone and Bones
Mandible
Alveolar Process
Gingiva
Nonparametric Statistics
Mouth
Tomography

All Science Journal Classification (ASJC) codes

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology
  • Dentistry(all)

Cite this

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title = "Influence of premature exposure of implants on early crestal bone loss: an experimental study in dogs",
abstract = "Objective: Several studies have reported on spontaneous early exposure of submerged implants, suggesting that exposed implants have greater bone loss than nonexposed implants. The purpose of this study was to compare the effects of implant-abutment connections and partial implant exposure on crestal bone loss around submerged implants. Study design: Bilateral, edentulated, flat alveolar ridges were created in the mandible of 6 mongrel dogs. After 3 months of healing, 2 fixtures were placed on each side of the mandible following a commonly accepted 2-stage surgical protocol. The fixtures on each side were randomly assigned to 1 of 2 procedures. In the first, a cover screw was connected to the fixture, and the incised gingiva was partially removed to expose the cover screw (partially exposed group). In the second, a healing abutment was connected to the fixture so that the coronal portion of the abutment remained exposed to the oral cavity (abutment-connected group). After 8 weeks, micro-computed tomography (micro-CT) at the implantation site was performed to measure the bone height in the peri-implant bone. Data were analyzed by Wilcoxon's signed rank test. Results: The average bone height was greater for the abutment-connected fixture (9.8 ± 0.5 mm) than for the partially exposed fixture (9.3 ± 0.5 mm; P < .05). Conclusion: These results suggest that when implant exposure is detected, the placement of healing abutments may help limit bone loss around the submerged implants.",
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Influence of premature exposure of implants on early crestal bone loss : an experimental study in dogs. / Yoo, Je Hyeon; Choi, Byung Ho; Li, Jingxu; Kim, Han Sung; Ko, Chang Yong; Xuan, Feng; Jeong, Seung Mi.

In: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology, Vol. 105, No. 6, 01.06.2008, p. 702-706.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Influence of premature exposure of implants on early crestal bone loss

T2 - an experimental study in dogs

AU - Yoo, Je Hyeon

AU - Choi, Byung Ho

AU - Li, Jingxu

AU - Kim, Han Sung

AU - Ko, Chang Yong

AU - Xuan, Feng

AU - Jeong, Seung Mi

PY - 2008/6/1

Y1 - 2008/6/1

N2 - Objective: Several studies have reported on spontaneous early exposure of submerged implants, suggesting that exposed implants have greater bone loss than nonexposed implants. The purpose of this study was to compare the effects of implant-abutment connections and partial implant exposure on crestal bone loss around submerged implants. Study design: Bilateral, edentulated, flat alveolar ridges were created in the mandible of 6 mongrel dogs. After 3 months of healing, 2 fixtures were placed on each side of the mandible following a commonly accepted 2-stage surgical protocol. The fixtures on each side were randomly assigned to 1 of 2 procedures. In the first, a cover screw was connected to the fixture, and the incised gingiva was partially removed to expose the cover screw (partially exposed group). In the second, a healing abutment was connected to the fixture so that the coronal portion of the abutment remained exposed to the oral cavity (abutment-connected group). After 8 weeks, micro-computed tomography (micro-CT) at the implantation site was performed to measure the bone height in the peri-implant bone. Data were analyzed by Wilcoxon's signed rank test. Results: The average bone height was greater for the abutment-connected fixture (9.8 ± 0.5 mm) than for the partially exposed fixture (9.3 ± 0.5 mm; P < .05). Conclusion: These results suggest that when implant exposure is detected, the placement of healing abutments may help limit bone loss around the submerged implants.

AB - Objective: Several studies have reported on spontaneous early exposure of submerged implants, suggesting that exposed implants have greater bone loss than nonexposed implants. The purpose of this study was to compare the effects of implant-abutment connections and partial implant exposure on crestal bone loss around submerged implants. Study design: Bilateral, edentulated, flat alveolar ridges were created in the mandible of 6 mongrel dogs. After 3 months of healing, 2 fixtures were placed on each side of the mandible following a commonly accepted 2-stage surgical protocol. The fixtures on each side were randomly assigned to 1 of 2 procedures. In the first, a cover screw was connected to the fixture, and the incised gingiva was partially removed to expose the cover screw (partially exposed group). In the second, a healing abutment was connected to the fixture so that the coronal portion of the abutment remained exposed to the oral cavity (abutment-connected group). After 8 weeks, micro-computed tomography (micro-CT) at the implantation site was performed to measure the bone height in the peri-implant bone. Data were analyzed by Wilcoxon's signed rank test. Results: The average bone height was greater for the abutment-connected fixture (9.8 ± 0.5 mm) than for the partially exposed fixture (9.3 ± 0.5 mm; P < .05). Conclusion: These results suggest that when implant exposure is detected, the placement of healing abutments may help limit bone loss around the submerged implants.

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