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Biomedical subjects

G Marzo

Publications and source records attributed to G Marzo.

11 recordsLinked to original sources
PubMed2006

Radiographic appearance of apical closure in apexification: follow-up after 7-13 years.

AIM: This was the radiographic evaluation of 15 maxillary incisors apexification treatment carried out on 7-9 years old patients with periapical pathology due to pulpal necrosis after dental trauma. MATERIALS AND METHODS: The treatment consisted of two phases. The aim of first phase was the formation of a calcified apical barrier through calcium hydroxide medications repeated twice with a three months interval. The aim of the second phase was the obturation of the root canal system once achieved a radiographic evidence of the formation of an apical barrier. The treated teeth were radiographed at six months and then periodically once a year for a period of 7 and 13 years. RESULTS: The radiographic analysis allowed to underline three different kinds of apical formation: a physiological development of the apical portion with a final root length equal to the contralateral tooth; the formation of a cap tissue and an apical development with the final root length slightly shorter than the contralateral tooth; or the formation of different layers of mineralised tissue that aggregate together trough the years. CONCLUSION: Apexification is not a static phenomenon and the apexified area undergoes through the years to a conspicuous readjustment involving bone, apical root tissues and root filling material.

Calcium Hydroxide↗
PubMed2006

Ocular correction effects on EMG activity of stomatognathic muscles in children with functional mandibular lateral- deviation: a case control study.

AIM: This study was conducted in order to determine the ocular correction effects on electromyography activity of anterior temporal, masseter, sternocleidomastoid and anterior digastric muscles in children with functional mandibular lateral-deviation. METHODS: This study was performed on 32 subjects, aged between 8 and 12 years with functional lateral deviation of mandible and oculo-extrinsic muscular tone disorders. After complete ophthalmologic evaluation and ocular correction prescription, the children were randomly divided into two groups: study and control. In the study group (16 subjects) EMG activity at rest was recorded in the following conditions: with eyes closed; with eyes open; with ocular correction modified through electromyographic control. In the control group (16 subjects) EMG activity at rest was recorded in the following conditions: with eyes closed; with eyes open; with conventional ocular correction. Data were acquired in 15-seconds trial using a SEMG K7, while the subjects maintained rest dental position. RESULTS/STATISTICS: Both groups presented a significative correlation between value of lateral-deviation and the degree of ocular-extrinsic muscular tone disorders (r=0.69). In addition, a significant statistical increase of EMG activity at rest with eyes open in both groups was observed in the anterior temporal left and right. A significant decrease of EMG activity with open eyes was observed only with ocular correction upon electromyographic control (study group). The findings, expressed as Symmetry Index, showed a significant increase of muscles imbalance right/left with conventional methods of ocular correction (p < 0.0001). CONCLUSION: The significant worsening in EMG activity, mainly observed with conventional corrective lenses, could have an important consequence in clinical diagnostic and therapeutic behaviour because anterior temporal muscles are important in postural position of the mandible. Instead EMG corrective lenses could improve tonus and balance of stomatognathic muscles and, therefore, support the functionality of orthodontic treatment. Moreover, the data suggest an interesting new tool in order to reach an interdisciplinary approach to complex growth disorders represented by functional lateral deviation of mandible and ocular-extrinsic muscular tone disorders.

Child↗
PubMed2005

Pit and fissure sealants: results at five and ten years.

AIM: This was to evaluate the efficacy of pit and fissure sealant (FS) using two different application techniques for caries prevention assessed at five and ten years. METHODS: The study was conducted using Delton(R) pit and fissures sealant applied with either rubber dam (RD) (Group A: 50 children, 200 first permanent molars, 120 second permanent molars) or cotton wool rolls (CR) (Group B: 50 children, 200 first permanent molars, 112 second permanent molars). At five and ten years FS were evaluated for retention, loss and incidence of occlusal and proximal carious lesions recorded. STATISTICS: The data were analysed with the Chi- square test comparing the results obtained for first permanent molars and second permanent molars at five and ten years. RESULTS: There was no statistical difference between results in the two groups (p< or =0.05). The highest retention rate, 81.7%, was found for second permanent molars sealed under RD at the five year assessment. The lowest, 64.3% also for second molars sealed under CR humidity control at ten years. CONCLUSIONS: Pit and fissure sealants are a valid preventive approach that can be applied with similar results with rubber dam or cotton rolls.

Adolescent↗
PubMed2004

Relationship between mandibular deviation and ocular convergence.

Recent studies have confirmed the relationship between head posture, mandibular position and visual focusing. A case-controlled study was conducted to assess the occurrence of ocular convergence defects between subjects with functional mandibular latero-deviation and healthy subjects in pediatric age. Sixty subjects (the study group) presented mandibular latero-deviation classified as functional according to the use of a clinical examination and frontal and basal tele-radiography. Sixty subjects without functional mandibular laterodeviation (control group) were selected randomly from all subjects seeking pediatric dental care and matched by gender and age to study group. All one hundred and twenty subjects were submitted to orthoptic tests performed by the same operator. These results seemed to confirm that in mandibular latero-deviation subjects ocular convergence defects occurred in greater frequency than in controls underlining the importance of role of pediatric dentistry among interdisciplinary cooperation.

Case-Control Studies↗
PubMed2003

Psychological aspects in paediatric dentistry: parental presence.

AIM: The scope of the present study has been the analysis of the main psychological approaches used during a first dental visit of a child to gain the necessary collaboration, focusing on the influence of parental presence during the visit. METHODS: The study was conducted on a group of 200 children divided into two sub-groups. In Group I the child was seen without the parent's presence and in Group II the parent was present throughout the visit. Assessment of behaviour was by a simple 'co-operative' or 'non-cooperative' in achieving a dental examination and prophylaxis. Statistical analysis was made by chi square and Fisher's exact test. RESULTS: In Group I (parent out) 89% of children were fully co-operative compared with 63% in Group II (parent present) which was significantly different (chi square 18.503, p<0.001). In addition 8% of children in Group II failed to return for any further dental care compared with 1% in Group I, which was also significantly different (Fisher's exact test p=0.1231). CONCLUSION: Parental presence affects a child's behaviour on an initial dental visit, which is better when the parent is excluded.

Chi-Square Distribution↗
PubMed2002

Chemical and pharmacological shaping of necrotic primary teeth.

AIM: The object of this study was the evaluation of the success rate of endodontic treatment of primary teeth with necrotic pulps performed through a partial pulpectomy and a chemical shaping. MATERIALS AND METHODS: The study was conducted on 50 necrotic primary molars, with an oral fistula and a clinical and radiographical positive diagnosis. On each tooth the endodontic treatment was performed through mechanical strumentation for only 2-3 mm beyond the orifices of the canals and copious alternate irrigation with 10vol H(2)O(2) and 3% NaOCl (chemical shaping). After the pharmacological shaping the canals were filled with a slurry mix of powdered macrolide antibiotic (josamicina) and glycerine (or anaesthetic solution). At the second visit the same procedure was either repeated, if an oral fistula was still present, or the canals were sealed with a small amount of josamicina and glycerine paste and zinc oxide eugenol to a working length. RESULTS: The overall success rate, considering the first two teeth that were extracted as inappropriate case selection, was 45 out of the original 48 or 93%. While considering all the teeth treated the success rate was 45 out of 50, or 90%.

Journal Article↗
PubMedDate not supplied

Caries-risk assessment: the role of salivary tests.

Although the incidence of caries has diminished dramatically over the past 3 decades, small groups of subjects remain highly susceptible and do not respond to conventional preventive programs. An accurate individual caries-risk assessment allows to identify the etiological factors responsible for the disease and design a rational approach to treatment, addressed to the specific needs of the patients. The use of appropriate caries-risk prediction models, which include the use of simple chairside caries-susceptibility salivary tests, is the most suitable and modern approach to the problem. A review of the literature on salivary tests, at present available, able to identify the factors contributing to caries susceptibility, is presented. Each test is accurately described, with regard both to its procedure and the interpretation of its results:

Dental Caries↗