Kinematic analysis of mandibular motion before and after mandibulectomy and mandibular reconstruction in dogs

Boaz Arzi, Frank J Verstraete, Tanya C. Garcia, Monica Lee, Se Eun Kim, Susan M Stover

Research output: Contribution to journalArticle

Abstract

OBJECTIVE: To evaluate and quantify the kinematic behavior of canine mandibles before and after bilateral rostral or unilateral segmental mandibulectomy as well as after mandibular reconstruction with a locking reconstruction plate in ex vivo conditions. SAMPLE: Head specimens from cadavers of 16 dogs (range in body weight, 30 to 35 kg). PROCEDURE: Specimens were assigned to undergo unilateral segmental (n = 8) or bilateral rostral (8) mandibulectomy and then mandibular reconstruction by internal fixation with locking plates. Kinematic markers were attached to each specimen in a custom-built load frame. Markers were tracked in 3-D space during standardized loading conditions, and mandibular motions were quantified. Differences in mandibular range of motion among 3 experimental conditions (before mandibulectomy [ie, with mandibles intact], after mandibulectomy, and after reconstruction) were assessed by means of repeated-measures ANOVA. RESULTS: Both unilateral segmental and bilateral rostral mandibulectomy resulted in significantly greater mandibular motion and instability, compared with results for intact mandibles. No significant differences in motion were detected between mandibles reconstructed after unilateral segmental mandibulectomy and intact mandibles. Similarly, the motion of mandibles reconstructed after rostral mandibulectomy was no different from that of intact mandibles, except in the lateral direction. CONCLUSIONS AND CLINICAL RELEVANCE: Mandibular kinematics in head specimens from canine cadavers were significantly altered after unilateral segmental and bilateral rostral mandibulectomy. These alterations were corrected after mandibular reconstruction with locking reconstruction plates. Findings reinforced the clinical observations of the beneficial effect of reconstruction on mandibular function and the need for reconstructive surgery after mandibulectomy in dogs.

Original languageEnglish (US)
Pages (from-to)637-645
Number of pages9
JournalAmerican journal of veterinary research
Volume80
Issue number7
DOIs
StatePublished - Jul 1 2019

Fingerprint

Mandibular Reconstruction
kinematics
Mandible
Biomechanical Phenomena
Dogs
dogs
Mandibular Osteotomy
Cadaver
Canidae
Reconstructive Surgical Procedures
Head
surgery
analysis of variance
body weight
Articular Range of Motion
Analysis of Variance
Body Weight

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Kinematic analysis of mandibular motion before and after mandibulectomy and mandibular reconstruction in dogs. / Arzi, Boaz; Verstraete, Frank J; Garcia, Tanya C.; Lee, Monica; Kim, Se Eun; Stover, Susan M.

In: American journal of veterinary research, Vol. 80, No. 7, 01.07.2019, p. 637-645.

Research output: Contribution to journalArticle

@article{0b59238d9ca14bb4999a1305a4e96410,
title = "Kinematic analysis of mandibular motion before and after mandibulectomy and mandibular reconstruction in dogs",
abstract = "OBJECTIVE: To evaluate and quantify the kinematic behavior of canine mandibles before and after bilateral rostral or unilateral segmental mandibulectomy as well as after mandibular reconstruction with a locking reconstruction plate in ex vivo conditions. SAMPLE: Head specimens from cadavers of 16 dogs (range in body weight, 30 to 35 kg). PROCEDURE: Specimens were assigned to undergo unilateral segmental (n = 8) or bilateral rostral (8) mandibulectomy and then mandibular reconstruction by internal fixation with locking plates. Kinematic markers were attached to each specimen in a custom-built load frame. Markers were tracked in 3-D space during standardized loading conditions, and mandibular motions were quantified. Differences in mandibular range of motion among 3 experimental conditions (before mandibulectomy [ie, with mandibles intact], after mandibulectomy, and after reconstruction) were assessed by means of repeated-measures ANOVA. RESULTS: Both unilateral segmental and bilateral rostral mandibulectomy resulted in significantly greater mandibular motion and instability, compared with results for intact mandibles. No significant differences in motion were detected between mandibles reconstructed after unilateral segmental mandibulectomy and intact mandibles. Similarly, the motion of mandibles reconstructed after rostral mandibulectomy was no different from that of intact mandibles, except in the lateral direction. CONCLUSIONS AND CLINICAL RELEVANCE: Mandibular kinematics in head specimens from canine cadavers were significantly altered after unilateral segmental and bilateral rostral mandibulectomy. These alterations were corrected after mandibular reconstruction with locking reconstruction plates. Findings reinforced the clinical observations of the beneficial effect of reconstruction on mandibular function and the need for reconstructive surgery after mandibulectomy in dogs.",
author = "Boaz Arzi and Verstraete, {Frank J} and Garcia, {Tanya C.} and Monica Lee and Kim, {Se Eun} and Stover, {Susan M}",
year = "2019",
month = "7",
day = "1",
doi = "10.2460/ajvr.80.7.637",
language = "English (US)",
volume = "80",
pages = "637--645",
journal = "American Journal of Veterinary Research",
issn = "0002-9645",
publisher = "American Veterinary Medical Association",
number = "7",

}

TY - JOUR

T1 - Kinematic analysis of mandibular motion before and after mandibulectomy and mandibular reconstruction in dogs

AU - Arzi, Boaz

AU - Verstraete, Frank J

AU - Garcia, Tanya C.

AU - Lee, Monica

AU - Kim, Se Eun

AU - Stover, Susan M

PY - 2019/7/1

Y1 - 2019/7/1

N2 - OBJECTIVE: To evaluate and quantify the kinematic behavior of canine mandibles before and after bilateral rostral or unilateral segmental mandibulectomy as well as after mandibular reconstruction with a locking reconstruction plate in ex vivo conditions. SAMPLE: Head specimens from cadavers of 16 dogs (range in body weight, 30 to 35 kg). PROCEDURE: Specimens were assigned to undergo unilateral segmental (n = 8) or bilateral rostral (8) mandibulectomy and then mandibular reconstruction by internal fixation with locking plates. Kinematic markers were attached to each specimen in a custom-built load frame. Markers were tracked in 3-D space during standardized loading conditions, and mandibular motions were quantified. Differences in mandibular range of motion among 3 experimental conditions (before mandibulectomy [ie, with mandibles intact], after mandibulectomy, and after reconstruction) were assessed by means of repeated-measures ANOVA. RESULTS: Both unilateral segmental and bilateral rostral mandibulectomy resulted in significantly greater mandibular motion and instability, compared with results for intact mandibles. No significant differences in motion were detected between mandibles reconstructed after unilateral segmental mandibulectomy and intact mandibles. Similarly, the motion of mandibles reconstructed after rostral mandibulectomy was no different from that of intact mandibles, except in the lateral direction. CONCLUSIONS AND CLINICAL RELEVANCE: Mandibular kinematics in head specimens from canine cadavers were significantly altered after unilateral segmental and bilateral rostral mandibulectomy. These alterations were corrected after mandibular reconstruction with locking reconstruction plates. Findings reinforced the clinical observations of the beneficial effect of reconstruction on mandibular function and the need for reconstructive surgery after mandibulectomy in dogs.

AB - OBJECTIVE: To evaluate and quantify the kinematic behavior of canine mandibles before and after bilateral rostral or unilateral segmental mandibulectomy as well as after mandibular reconstruction with a locking reconstruction plate in ex vivo conditions. SAMPLE: Head specimens from cadavers of 16 dogs (range in body weight, 30 to 35 kg). PROCEDURE: Specimens were assigned to undergo unilateral segmental (n = 8) or bilateral rostral (8) mandibulectomy and then mandibular reconstruction by internal fixation with locking plates. Kinematic markers were attached to each specimen in a custom-built load frame. Markers were tracked in 3-D space during standardized loading conditions, and mandibular motions were quantified. Differences in mandibular range of motion among 3 experimental conditions (before mandibulectomy [ie, with mandibles intact], after mandibulectomy, and after reconstruction) were assessed by means of repeated-measures ANOVA. RESULTS: Both unilateral segmental and bilateral rostral mandibulectomy resulted in significantly greater mandibular motion and instability, compared with results for intact mandibles. No significant differences in motion were detected between mandibles reconstructed after unilateral segmental mandibulectomy and intact mandibles. Similarly, the motion of mandibles reconstructed after rostral mandibulectomy was no different from that of intact mandibles, except in the lateral direction. CONCLUSIONS AND CLINICAL RELEVANCE: Mandibular kinematics in head specimens from canine cadavers were significantly altered after unilateral segmental and bilateral rostral mandibulectomy. These alterations were corrected after mandibular reconstruction with locking reconstruction plates. Findings reinforced the clinical observations of the beneficial effect of reconstruction on mandibular function and the need for reconstructive surgery after mandibulectomy in dogs.

UR - http://www.scopus.com/inward/record.url?scp=85068862012&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068862012&partnerID=8YFLogxK

U2 - 10.2460/ajvr.80.7.637

DO - 10.2460/ajvr.80.7.637

M3 - Article

C2 - 31246128

AN - SCOPUS:85068862012

VL - 80

SP - 637

EP - 645

JO - American Journal of Veterinary Research

JF - American Journal of Veterinary Research

SN - 0002-9645

IS - 7

ER -