December, 2009, Vol. 11, No. 4

CONTENTS

Effects of different repolishing techniques on colour change of provisional prosthetic materials
Vygandas Rutkunas, Vaidotas Sabaliauskas
105 -112

Early Morphofunctional Response of Contact Tissue after Intraosal Implantation in Rabbit Jaw of Pure Synthetic Hydroxyapatite (HAp) Bioceramic Materials and HAp Saturated with Lidocaine
Ilze Salma, Mara Pilmane, Andrejs Skagers, Janis Vetra, Girts Salms, Liga Berzina-Cimdina, Rita Serzane
113-118

Relationship between tooth size discrepancies and malocclusion
Kristina Lopatiene, Aiste Dumbravaite
119-124

Osteopontin and Osteocalcin in Maxilla Tissue of Skeletal Class III Patients
Iveta Jankovska, Mara Pilmane, Ilga Urtane
125-128

In vitro investigation of the integration depth of oral fluids and disinfectants into alginate impressions
Rimas Surna, Jonas Junevicius, Evaldas Rutkauskas
129-134

© 2009 Stomatologija

Stomatologija 2009; 11 (4): 125-128 342 KB

Osteopontin and Osteocalcin in Maxilla Tissue of Skeletal Class III Patients

Iveta Jankovska, Mara Pilmane, Ilga Urtane

Summary

Bone extracellular matrix proteins osteopontin and osteonectin have important function during embryonic osteogenesis and are active in bone remodeling process. Knowledge about bone extracellular matrix proteins explores the mechanisms of craniofacial development and helps to understand better morphopathogenesis of severe dentofacial anomalies. Aim of the current study was to investigate an expression of osteopontin and osteocalcin in maxilla tissue in skeletal Class III patients.

The study group included 10 skeletal Class III patients to whom combined orthodontic and surgical treatment was recommended. Samples of tuber maxillae tissue from ten skeletal Class III malocclusion patients were collected due the orthognatic surgery procedure. The routine histological method was followed and samples were stained by hematoxyline-eosine. Tissue samples were stained according the standard immunohistochemical methods and expression of osteocalcin and osteopontin in maxilla tissue was examined. Distribution of these factors was evaluated semiquantitetively by counting the positive structures in visual field.

The trabecules of bone contained parallel located collagen fibers and irregular bone mineralization. Connective tissue proliferation in osteon channels was observed. Quantity of cells positive to osteopontin was higher than quantity of cells containing osteocalcin in all patterns extracted of maxilla tissue in patients with skeletal Class III.

In few cases osteocalcin positive cells were located near the border with soft tissue – close to osteogenic cells zone, but no osteocalcin was observed deeper in bone. The intensity of osteocalcin expression was variable, and differs individually despite the relatively regular osteopontin distribution in all patterns.

There were pronounced osteopontin, but not osteocalcin-containing cells with approximately similar intensity of protein expression in tuber maxillae in skeletal Class III patients.

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¹Department of Orthodontics, Institute of Stomatology, Riga Stradins University, Riga, Latvia

²Institute of Anatomy and Anthropology, Riga Stradins University, Riga, Latvia

Iveta Jankovska¹ – D.D.S.

Mara Pilmane² – Dr. med., Dr. hab. med., Corresponding member of Latvian Academy of Science, Director of Institute of Anatomy and Anthropology

Ilga Urtane¹ – D.D.S., Dr. med., Professor and Head of Department of Orthodontics, Director of Institute of Stomatology

Address correspondence to Iveta Jankovska, Department of Orthodontics, Institute of Stomatology, Riga Stradins University, 20 Dzirciema Street, Riga, Latvia, LV 1007.

E-mail address: iveta.j@one.lv