Home Archive Vol.39, No.2, 2013 Case Reports Study on the Importance of the Complementary Exams for the Dento- Parodontal Changes to the Patiences with Occlusal Trauma

Study on the Importance of the Complementary Exams for the Dento- Parodontal Changes to the Patiences with Occlusal Trauma


1 U.M.F. Craiova, Faculty of Dental Medicine, Departament of Prothetics-Oclusology; 2 U.M.F. Craiova, Faculty of Dental Medicine, Departament of Oral Health; 3 U.M.F. Craiova, Faculty of Medicine, Departament of Pathology

ABSTRACT: The diagnosis of the occlusal disorders of the dento-maxillary is a delicate stage, but of great importance in establishing the functional rehabilitation of the dental arches. Occlusal disorders occur as a result of dental anomalies of number, odontal coronary lesions, dental migration, edentulous, gnatoprotetic devices  improperly executed, changes of the occlusion parameters, and secondary musculoskeletal and joint disorders.The difficulty in the diagnosis, is that any trauma occurring in any component of the stomatognathic system  may lead to occlusal dysfunction. Meanwhile, occlusal dysfunction can cause symptoms in all dento-maxillary structures. Recent research on the phenomenon of occlusal trauma etiology showed major difficulties in determining the exact causes and evolution of the phenomenon itself. This paper highlights the importance  of usage in practice of the registration and transfer  systems, also the important role of the radiological examination in detecting and highlighting the phenomenon of occlusal trauma.

KEYWORDS: occlusal trauma, occlusal dysfunction, alveolar resorbtion, miloliza.


The problem in diagnosing  patients with trauma of occlusal nature of the  dento-maxillary is  that it is difficult to draw the dividing limit between normal and pathological state. Deviations from occlusal morphology and function are often unexpected consequence of dental procedures , plus, as a starting point dental architecture itself.

The restoration of the “peaceful state of occlusion “is a priority in the medical practice requiring the follow-up of each patient. In this case the completion of clinical information through data provided by complementary  exams  becomes a necessity.

Materials and methods

The research was conducted on a total of 45 patients who presented themselves at Prosthodontics Clinic of the Faculty of Dentistry at the University of Medicine Craiova. The radiological examination was conducted in collaboration with the Department of Imaging and Radiology. In this study we included patients, of both sexes, that had no problems associated with the oral mucous or other general disorders.

In the Department of Prosthodontics the commonly used technique is the  intraoral graphical registration. It is used in this manner a partially programmable articulator and the Gelber set. Recording the position of the jaw compared to the skull involves using face bow transfer. The facial  arch is provided with a  nasal stopper  which permits the stabilization of the patient  , also materializing the horizontal plane of reference depending on the length of the stopper rod attachment site is located approximately in the plane Frankfurt. Radiological examination was performed on groups of teeth, or teeth at the front and side teeth in both the maxilla and mandible as and panoramic radiographs.


The registration intraoral graphics is a relatively simple method but with superior results compared to the classical methods of determining the premature contacts and the occlusal interferences. The clinical exam in many cases can provide wrong data on dento-dental relationships and false information on determining the centric relation and maximum intercuspidal relationship. The technique proves its importance in the occlusal rebalancing by selective polishes performed both to patients who show signs of occlusal dysfunction, and especially in situations where restoring the integrity of the dental arch is achieved by gnatoprotetics devices.

 The radiological exam highlights the changes in the dental and bone injuries related to the development of dental, periodontal or other, whose clinical manifestation and dysfunctional symptoms can overlap.

Based on these observations we selected a series of clinical cases that we present in this paper.


Case report 1

S.M. patient, 26 years old, requires a complete dental checking and accuses a slight retraction and bleeding of the gums when brushing the front maxillary and mandibular area. The clinical examination shows the presence of the caries at the neck level of the dental units together with  an abrasion  located in the upper front incisor level (2.1.), at the incision level, and at the mandibular central incisor (3.1.) due to the vicious habit of interposition of various objects at this level. The mandibular dental arch presents an incorrectly executed  conjunct non-physionomic prosthetic which at the clinical examination shows premature contacts and interference in the lateral movement, also proven by the studied models mounted in the articulator. At the mandible it is observed the presence of tremor together with the opening of the interdental space 3.1.a-3.2. and at  the level of 4.1 - 4.2.



Fig.1.Clinical aspect,  overview

 Radiologically, at the jaw level , we have noticed minor bone injuries of various types: low bone resorption of the interalveolar septum, this one having an amputated aspect or being of the type of halisteresis resorption in the central zone of the interalveolar bone septum with the hypercondensation of the internal alveolar blade. The radiological examination at the mandibular level  shows for  the inferior frontal incisors a sharp amputation of the interdental septa accompanied by a decrease in volume of the pulp cavity.

Fig.2.Interalveolar sept resorption

Fig.3.Horizontal and vertical alveolar bone resorbtion)

Case report 2

V.C.patient, 54 years old shows to the dental checking  accusing the presence of lesions in the maxillary front group. Clinical examination shows at the jaw level, in the lateral areas, the presence of two non-physionomic incorrectly executed prosthetics. The models analysis in the half programmable articulator proves the presence of the premature contacts and of the occlusal interferences. The lack of the occlusal rebalance therapy after the completion of the prosthetics determined the appearance of the occlusal trauma clinically put into evidence in this case for  the superior frontal group by typical mylolysis lesions.

Fig.4.Clinical aspect right maxillary arcade,

Fig.5.Clinical aspect, left maxillary arcade

Radiological examination shows us the geometry of the mylolysis  lesions, pathognomonic sign in the occlusal trauma, hypercementosis at the 3.7. level

Fig.6.Radiological image of the mylolysis lesions, diffuse calcifications

Fig.7.Hypercementosis and diffuse pulp calcifications 3.7.


The occlusal dysfunction determines the occurrence of some supraliminal forces, traumatogene, but their transmission direction coincides with the route of the physiological occlusal forces overtaking: the tooth - the periodontal ligament – the alveolar bone[1,2]. Our research showed that poorly made prosthetic rehabilitation in conjunction wrong endodontic treatments causes premature contacts and occlusal interferences, situations in which the horizontal occlusal forces cause changes occurring at the dental-periodontal level[3,4,5]. The consequence of this situation serves to emphasize or even aggravation of the occlusal dysfunction[6.7 ]. In this way the occlusal trauma occured either in the dental unit or dental group or lead to the destructions of the periodontal ligaments manifested by tooth mobility and  bone lesions manifested by resorbtions or emphasized bone appositions.

The action of the microbial factors depends on the ratio of the interalveolar bone septum peak and the apical level of the subgingival bacterial plaque adherent to the gingival sulcus epithelium. The bacteria located at this level have a range of 1.5-2.5 mm. The increase of their virulence induces the increase of their outreach and causes inflammatory lesions of interdental space structures[8]. As for the patients with marginal periodontal with normal clinical aspect the gingival bacterial penetration level is low, the bacterial plaque does not penetrate deeply and completely the gingival sulcus epithelium.

It can be concluded that the dental tissues subjected to the occlusal trauma undergoes a hipercalcification process[1.8]. The coronary volume can be reduced , amputated by more or less pronounced abrasion processes. We noticed that in some cases that, after a relatively short period, the occlusal lack of balance after the prosthetic treatments allows the appearance of the abrasion areas, mainly in the antagonist arches  . The pulp cavity can appear much reduced due to the deposition of the secondary dentine, and sometimes it is observed the appearance of the pulpolithes.

There can be detected inversions of the crown-root ratio in horizontal and vertical direction and mylolysis lesions, showing clear that the tooth suffers from occlusal trauma. All our studies have shown the association of the mylolysis lesions with the phenomenon of occlusal trauma  in which the presence of tooth mobility was associated in most of the  clinical cases. The radiography is particularly important when the clinical symptoms are relatively minimal[9.10]. We noticed horizontal and vertical resorptions of the alveolar bone. The reversal of the crown-root ratio in the horizontal direction occurs when increased abrasion bring the  surface of the occlusion in the maximum coronary equator, increasing the  instability of the tooth. Changing the crown-root ratio in the vertical direction is highlighted when the clinical crown is increased by resorbtions and alveolar atrophy, too high fillings, incorrect prosthetic treatment [11], as showed in our research. 


1. If the occlusal trauma occurs in patients with a periodontal with clinically normal alveolar bone and ligament  it causes minor injuries without having inflammatory character.

2. The marginal periodontal disease with bivalent, occlusal and bacterial etiology, is clinically manifested by signs of inflammation, but it is accompanied by the damaging of  the fibers of the ligament and of the alveolar bone structures.

3. The occlusal trauma produces in dental tissues a hipercalcification  process.

4. The resorbtions   and the alveolar atrophy determine the changing of the crown-root ratio in both in the vertical and in the horizontal direction.

5. The deposits of dentine, side senescence produce an uniform narrowing of the pulp chamber and root canal almost to extinction.



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Coresponding Author: Associate professor Mihai Raul Popescu PhD,MD;UMF Craiova, Facultaty of Dental Medicine, e-mail:popescumihairaul@yahoo.com

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