Effects of different depths of gap on healing of surgically created coronal defects around implants in dogs: A pilot study

Hong Cheol Yoon, Jung Yoo Choi, Ui-Won Jung, Eun Kyung Bae, Seongho Choi, Kyoo Sung Cho, Ho Yong Lee, Chong Kwan Kim, June Sung Shim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Background: This study investigated the bone growth pattern in surgically created coronal defects with various depths around implants in dogs. Methods: Four mongrel dogs were used. All mandibular premolars were extracted under general anesthesia and left to heal for 2 months. After ostectomy, bony defects were prepared in test sites, using a stepped drill with a diameter of 6.3 mm and two depths: 2.5 mm (test sites 1 [T1]) and 5.0 mm (test sites 2 [T2]). In the control sites, the implants were placed after ostectomy without any coronal defects. T1, T2, and control sites were prepared in the right and left sides of the mandible. Six implants, 3.3 mm in diameter and 10 mm in length, were placed in each dog; the implants were submerged completely. Two dogs were sacrificed 8 weeks after surgery, and the other two dogs were sacrificed 12 weeks after surgery. The stability of all implants was measured with a resonance frequency analyzer after placement and after sacrifice. All sites were block-dissected for ground sectioning and histo-logic examination. Results: After 12 weeks of healing, only T2 were not filled fully with bone. At week 8, the mean bone-to-implant contact (BIC) was 47.7% for control, 43.6% for T1, and 22.2% for T2. At week 12, the control BIC was 56.7% and the 2.5-mm defect had a greater BIC (58.8%). However, in the 5-mm defect, the BIC was 35.1%. At insertion, stability was reduced at sites with a greater defect depth. Similar stability was noted in all specimens after 8 and 12 weeks of healing. Conclusion: Bone healing between an implant and marginal bone was compromised at sites with a deeper defect when the width of the bone defect was 1.5 mm.

Original languageEnglish
Pages (from-to)355-361
Number of pages7
JournalJournal of Periodontology
Volume79
Issue number2
DOIs
Publication statusPublished - 2008 Feb 1

Fingerprint

Dogs
Bone and Bones
Mandrillus
Bone Development
Bicuspid
Mandible
General Anesthesia

All Science Journal Classification (ASJC) codes

  • Periodontics

Cite this

Yoon, Hong Cheol ; Choi, Jung Yoo ; Jung, Ui-Won ; Bae, Eun Kyung ; Choi, Seongho ; Cho, Kyoo Sung ; Lee, Ho Yong ; Kim, Chong Kwan ; Shim, June Sung. / Effects of different depths of gap on healing of surgically created coronal defects around implants in dogs : A pilot study. In: Journal of Periodontology. 2008 ; Vol. 79, No. 2. pp. 355-361.
@article{5ea9135b57684efe8fd02315ed5a0d8d,
title = "Effects of different depths of gap on healing of surgically created coronal defects around implants in dogs: A pilot study",
abstract = "Background: This study investigated the bone growth pattern in surgically created coronal defects with various depths around implants in dogs. Methods: Four mongrel dogs were used. All mandibular premolars were extracted under general anesthesia and left to heal for 2 months. After ostectomy, bony defects were prepared in test sites, using a stepped drill with a diameter of 6.3 mm and two depths: 2.5 mm (test sites 1 [T1]) and 5.0 mm (test sites 2 [T2]). In the control sites, the implants were placed after ostectomy without any coronal defects. T1, T2, and control sites were prepared in the right and left sides of the mandible. Six implants, 3.3 mm in diameter and 10 mm in length, were placed in each dog; the implants were submerged completely. Two dogs were sacrificed 8 weeks after surgery, and the other two dogs were sacrificed 12 weeks after surgery. The stability of all implants was measured with a resonance frequency analyzer after placement and after sacrifice. All sites were block-dissected for ground sectioning and histo-logic examination. Results: After 12 weeks of healing, only T2 were not filled fully with bone. At week 8, the mean bone-to-implant contact (BIC) was 47.7{\%} for control, 43.6{\%} for T1, and 22.2{\%} for T2. At week 12, the control BIC was 56.7{\%} and the 2.5-mm defect had a greater BIC (58.8{\%}). However, in the 5-mm defect, the BIC was 35.1{\%}. At insertion, stability was reduced at sites with a greater defect depth. Similar stability was noted in all specimens after 8 and 12 weeks of healing. Conclusion: Bone healing between an implant and marginal bone was compromised at sites with a deeper defect when the width of the bone defect was 1.5 mm.",
author = "Yoon, {Hong Cheol} and Choi, {Jung Yoo} and Ui-Won Jung and Bae, {Eun Kyung} and Seongho Choi and Cho, {Kyoo Sung} and Lee, {Ho Yong} and Kim, {Chong Kwan} and Shim, {June Sung}",
year = "2008",
month = "2",
day = "1",
doi = "10.1902/jop.2008.070306",
language = "English",
volume = "79",
pages = "355--361",
journal = "Journal of Periodontology",
issn = "0022-3492",
publisher = "American Academy of Periodontology",
number = "2",

}

Effects of different depths of gap on healing of surgically created coronal defects around implants in dogs : A pilot study. / Yoon, Hong Cheol; Choi, Jung Yoo; Jung, Ui-Won; Bae, Eun Kyung; Choi, Seongho; Cho, Kyoo Sung; Lee, Ho Yong; Kim, Chong Kwan; Shim, June Sung.

In: Journal of Periodontology, Vol. 79, No. 2, 01.02.2008, p. 355-361.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of different depths of gap on healing of surgically created coronal defects around implants in dogs

T2 - A pilot study

AU - Yoon, Hong Cheol

AU - Choi, Jung Yoo

AU - Jung, Ui-Won

AU - Bae, Eun Kyung

AU - Choi, Seongho

AU - Cho, Kyoo Sung

AU - Lee, Ho Yong

AU - Kim, Chong Kwan

AU - Shim, June Sung

PY - 2008/2/1

Y1 - 2008/2/1

N2 - Background: This study investigated the bone growth pattern in surgically created coronal defects with various depths around implants in dogs. Methods: Four mongrel dogs were used. All mandibular premolars were extracted under general anesthesia and left to heal for 2 months. After ostectomy, bony defects were prepared in test sites, using a stepped drill with a diameter of 6.3 mm and two depths: 2.5 mm (test sites 1 [T1]) and 5.0 mm (test sites 2 [T2]). In the control sites, the implants were placed after ostectomy without any coronal defects. T1, T2, and control sites were prepared in the right and left sides of the mandible. Six implants, 3.3 mm in diameter and 10 mm in length, were placed in each dog; the implants were submerged completely. Two dogs were sacrificed 8 weeks after surgery, and the other two dogs were sacrificed 12 weeks after surgery. The stability of all implants was measured with a resonance frequency analyzer after placement and after sacrifice. All sites were block-dissected for ground sectioning and histo-logic examination. Results: After 12 weeks of healing, only T2 were not filled fully with bone. At week 8, the mean bone-to-implant contact (BIC) was 47.7% for control, 43.6% for T1, and 22.2% for T2. At week 12, the control BIC was 56.7% and the 2.5-mm defect had a greater BIC (58.8%). However, in the 5-mm defect, the BIC was 35.1%. At insertion, stability was reduced at sites with a greater defect depth. Similar stability was noted in all specimens after 8 and 12 weeks of healing. Conclusion: Bone healing between an implant and marginal bone was compromised at sites with a deeper defect when the width of the bone defect was 1.5 mm.

AB - Background: This study investigated the bone growth pattern in surgically created coronal defects with various depths around implants in dogs. Methods: Four mongrel dogs were used. All mandibular premolars were extracted under general anesthesia and left to heal for 2 months. After ostectomy, bony defects were prepared in test sites, using a stepped drill with a diameter of 6.3 mm and two depths: 2.5 mm (test sites 1 [T1]) and 5.0 mm (test sites 2 [T2]). In the control sites, the implants were placed after ostectomy without any coronal defects. T1, T2, and control sites were prepared in the right and left sides of the mandible. Six implants, 3.3 mm in diameter and 10 mm in length, were placed in each dog; the implants were submerged completely. Two dogs were sacrificed 8 weeks after surgery, and the other two dogs were sacrificed 12 weeks after surgery. The stability of all implants was measured with a resonance frequency analyzer after placement and after sacrifice. All sites were block-dissected for ground sectioning and histo-logic examination. Results: After 12 weeks of healing, only T2 were not filled fully with bone. At week 8, the mean bone-to-implant contact (BIC) was 47.7% for control, 43.6% for T1, and 22.2% for T2. At week 12, the control BIC was 56.7% and the 2.5-mm defect had a greater BIC (58.8%). However, in the 5-mm defect, the BIC was 35.1%. At insertion, stability was reduced at sites with a greater defect depth. Similar stability was noted in all specimens after 8 and 12 weeks of healing. Conclusion: Bone healing between an implant and marginal bone was compromised at sites with a deeper defect when the width of the bone defect was 1.5 mm.

UR - http://www.scopus.com/inward/record.url?scp=39749088089&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=39749088089&partnerID=8YFLogxK

U2 - 10.1902/jop.2008.070306

DO - 10.1902/jop.2008.070306

M3 - Article

C2 - 18251651

AN - SCOPUS:39749088089

VL - 79

SP - 355

EP - 361

JO - Journal of Periodontology

JF - Journal of Periodontology

SN - 0022-3492

IS - 2

ER -